26QA004 Amendment 0002 SF 30.pdf

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended. is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER.

If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

16C. DATE SIGNED

Previous edition unusable STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6) CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X) 9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

Continuation of Description

Miscellaneous text in this section has been modified from:

MULTI-TURN VALVE ACTUATOR, STEM, AND PEDESTAL

Product Description

SECTION 35 20 16.54

PART 1 GENERAL

1.1 SCOPE

The work provided for herein consists of furnishing, and delivering one (1) multi-turn valve actuator, one (1) rising stem, two (2) stem guides, one (1) stem cover, and one (1) pedestal complete with all necessary accessories and appurtenances, all as shown on the contract drawings and specified herein. Provide one (1) included and one (1) spare stem lift nut, both threaded to match the stem. Installation of components under this contract will be performed by the Government. Electric actuators must meet the requirements of AWWA C542.

1.2 GENERAL REQUIREMENTS

The contract drawings indicate the requirements and general arrangement of the multi-turn valve actuator (hereafter called "actuator"), stem, stem guides, stem cover, and the pedestal. These components are replacements for existing equipment and will be installed by the Government on the existing water control structure for operating the existing cast iron slide gate at the Chippewa Diversion low flow channel in Watson, MN.

1.3 MEASUREMENT AND PAYMENT

The components will not be measured for payment. Payment will be made at the contract job price for "MULTI-TURN VALVE ACTUATOR, STEM, AND PEDESTAL." Price and payment constitute full compensation for furnishing all plant, labor, material and equipment, and preserving and

W912ES26QA0040002

delivering the actuator, stem, pedestal, stem nuts, stem guides, stem cover, and all appurtenances, accessories, and parts required.

1.4 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN GEAR MANUFACTURERS ASSOCIATION (AGMA)

ANSI/AGMA 6013 (2016B; R 2021) Standard for Industrial Enclosed Gear Drives

ANSI/AGMA 6113 (2016B; R 2021) Standard for Industrial Enclosed Gear Drives (Metric Edition)

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.1 (2024) Unified Inch Screw Threads (UN, UNR, and UNJ Thread Form)

ASME B1.5 (1997; R 2024) ACME Screw Threads

ASME B18.2.8 (1999; Stabilized 2021) Clearance Holes for Bolts, Screws, and Studs

ASME B36.19 (2022; Errata 2023) Welded and Seamless Wrought Stainless Steel Pipe

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C542 (2016; R 2021) Electric Motor Actuators for Valves and Slide Gates

AWWA C560 (2021) Cast-Iron Slide Gates

AWWA C561 (2021) Fabricated Stainless-Steel Slide Gates

ASTM INTERNATIONAL (ASTM)

ASTM A6/A6M (2026) Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

ASTM A240/A240M (2026) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A276/A276M (2025) Standard Specification for Stainless Steel Bars and Shapes

ASTM A312/A312M (2025) Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A484/A484M (2024b) Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings

ASTM B584 (2022) Standard Specification for Copper Alloy Sand Castings for General Applications

ASTM F593 (2024) Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs

ASTM F594 (2024) Standard Specification for Stainless Steel Nuts

AMERICAN WELDING SOCIETY (AWS)

AWS B2.1/B2.1M (2026) Specification for Welding Procedure and Performance Qualification

AWS D1.6/D1.6M (2017) Structural Welding Code -- Stainless Steel

AWS QC1 (2016) Specification for AWS Certification of Welding Inspectors

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY

(MSS)

MSS SP-102 (2024) Multi-Turn Valve Actuator Attachment

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2024) Motors and Generators

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-2-2610 (2025) Engineering and Design - Mechanical and Electrical Design for Lock and Dam Operating Equipment

1.5 DESIGN

Design load, extreme load, rated load, and working load are defined in the Chippewa Low Flow Gate Machinery Calculations document, provided in the appendix. The Chippewa Low Flow Gate Machinery Calculations document is for reference only. The Contractor is required to verify all calculations using actuator manufacturer data, stem guide manufacturer data, and material property values from the mill test reports for the stem and pedestal. The calculations document and this specification section contains the required standards, formulas, and parameters. The system must be able to move the gate at a rate of 6 to 12 inches per minute at the working load.

1.5.1 Actuator

The actuator must meet the applicable requirements of AWWA C542 and be a product of a manufacturer who has been engaged during the past ten (10) years in the production of actuators that comply with AWWA C542. Submit an Actuator Manufacturer Qualification Memo, prior to shipment from the manufacturing facility and signed by a manufacturing company officer, attesting to at least ten (10) years experience manufacturing actuators that comply with AWWA C542. The actuator must be able to produce the working load plus an additional 20 percent reserve capacity.

The effect of the stem factor in selecting the motor/actuator assembly must be calculated using the stem factor formula in AWWA C560 with a minimum coefficient of static friction for lubricated surfaces of 0.15. Submit Actuator Dimensional Outline Drawings and Data prior to ordering actuator.

1.5.2 Stem

Fabricate the stem from solid stainless steel as specified in PART 2.1 MATERIALS. Submit Stem Data and Calculations using the formulas, thread designation, design criteria, loads, and factors of safety given in the Chippewa Low Flow Gate Machinery Calculations document and contract drawings prior to fabrication of the stem. The Contractor may propose a commercial off-the-shelf pedestal as long as it can be shown that it meets the requirements of this section.

1.5.3 Pedestal

The pedestal must meet or exceed the strength requirements of EM 1110-2-2610 for tension, compression, and buckling. The pedestal must be designed with a minimum safety factor of 5 applied to the actuator's rated load with regard to the ultimate tensile strength of the material. The pedestal must be designed for a unit stress not to exceed 75% of the yield strength of the material used when subjected to the actuator's extreme load. The pedestal must be designed to withstand buckling with a minimum factor of safety of 3 applied to the maximum working load, using the Euler or J.B. Johnson formulas, as appropriate. Submit Pedestal Data and Calculations prior to fabrication of the pedestal.

1.5.4 Stem Guides

Stem guide components must be designed to withstand 2 percent of the rated load of the actuator assembly and must meet the requirements of AWWA C560 or AWWA C561. Submit Stem Guide Data and Calculations prior to fabrication of stem and pedestal.

1.6 WORKMANSHIP

All workmanship, whether in the factory or the field, must be performed in a skillful and professional manner by qualified mechanics under competent supervision and direction and in accordance with the best modern practice for the various trades involved and for the manufacture of high-grade machinery. All parts must have accurately machined mounting and bearing surfaces so that they can be assembled without fitting, chipping or re-machining. All parts must conform to the design dimensions and be free of defects in either workmanship or material that will impair their service. All attaching bolt holes must be accurately drilled to the layout indicated on the shop drawings and actuator dimensional outline drawings and data.

1.7 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Shop Drawings; G, ME

Actuator Dimensional Outline Drawings and Data; G, ME

Furnish the Contracting Officer for their review and approval dimensional outline drawings, catalog data and other information and calculations which will include at least the following:

(1) Name of actuator manufacturer.

(2) Model number and weight.

(3) Dimensional drawing.

(4) Descriptive bulletin, including a breakaway drawing illustrating all operating components, a parts list and materials of construction.

(5) Strength and durability HP ratings per ANSI/AGMA 6013 or ANSI/AGMA 6113.

(6) The electric motor's HP rating, the starting, running, and locked rotor torques, full load and locked rotor amps.

(7) The rated load of the actuator.

(8) The extreme (locked rotor) load of the actuator.

(9) Equipment sizing calculations, including all related factors and supporting literature.

(10) Control wiring diagram.

(11) Actuator Torque Switch Range and Settings

SD-03 Product Data

Actuator Manufacturer Qualification Memo

SD-05 Design Data

Stem Data and Calculations; G, ME

Pedestal Data and Calculations; G, ME

Stem Guide Data and Calculations; G, ME

Gate Lift System Checks And Tests; G, ME

SD-06 Test Reports

Welding Inspection Report

Quality Control Test Report; G, ME

Actuator Performance Test Report; G, ME

SD-07 Certificates

Welder Qualifications

Weld Inspector Certification

Material Certification; G

SD-10 Operation and Maintenance Data

Provide both an electronic (PDF) and a hard copy of Operation and Maintenance Manuals. All manuals and parts lists must be bound separately, be approximately 8-1/2 inches by 11 inches, printed on good quality paper and bound between flexible, durable covers. Drawings incorporated in the manual and/or parts lists may be reduced to page size provided they are clear and easily legible, or may be folded into the manual to page size. Photographs and/or catalog cuts of components may be included for identification. Submit the operation and maintenance manual and parts lists no later than the time of shipment of the gate actuators.

Installation Manual; G, ME

Operation And Maintenance Manuals; G, ME

1.8 SUBMITTAL DESCRIPTIONS

The following subparagraphs describe in detail the submittals pertaining to the work specified in this section.

1.8.1 Shop Drawings

Submit complete shop drawings of the actuator, stem, stem nuts, stem guides, stem cover with label, pedestal, appurtenances, accessories, and parts to the Contracting Officer for approval.

Submit drawings of items made specially or specifically for this project prior to fabrication. Submit drawings or catalog cuts of standard manufactured articles prior to ordering. Drawings of any items made specially or specifically for this project must be true shop drawings, but catalog cuts are sufficient for standard manufactured articles, and outline drawings of such equipment may be used in the assembly drawings. However, for those items for which true shop drawings are not required, sufficient descriptive data and/or other information, in addition to the catalog cuts, must be submitted to demonstrate compliance with the specifications.

1.8.2 Installation Manual

Prior to shipment of the gate actuator to the shop performing gate lift system testing, submit a copy of the actuator manufacturer's standard manual in electronic format (PDF) describing procedures to be followed in installing and adjusting the gate actuators. The installation manual must be of such a nature that it may be comprehended by an engineer or mechanic without extensive experience installing equipment of this type. The description must be a step by step explanation of operations required, and include, where applicable, such things as bolt torque values, actuator pre-assembly, electrical connections, commissioning procedures, functional checks, position and limit switch settings, adjustments, and similar details.

1.8.3 Operation and Maintenance Manuals

Submit both electronic (PDF) copies and hard copies of all operation and maintenance, lubrication, and repair manuals for all equipment. Furnish operation and maintenance manuals containing complete information in connection with the operation, lubrication, adjustment, routine and/or special maintenance, disassembly, repair and reassembly of the electric motor driven gate actuators and appurtenances furnished under this section. Furnish copies of the manufacturer's spare parts lists and/or bulletins for the gate actuators and appurtenances. Clearly show all details and parts, and adequately describe all parts or have proper identification marks. Submit the operation and maintenance manual and parts lists at the time of shipment of the gate actuators.

1.8.4 Quality Control Test Report

Submit a Quality Control Test Report of the stem, stem lift nuts, and pedestal prior to shipment from fabrication facility. Report dimensional checks of the stem, stem lift nuts, and pedestal.

Dimensional values are provided in the contract drawings. Meet the tolerance requirements of

ASTM A484/A484M.

1.9 PREPARATION FOR SHIPMENT

Prior to shipment, prepare all equipment and parts for shipment as described herein. All large, bulky and/or heavy, greater than 100 pounds, elements must be mounted on skids or pallets of ample size and strength to facilitate loading and unloading. Pack all small parts in sturdy wood or heavy corrugated paperboard boxes. Provide a packing list, indicating the contents of each such box and enclose in a moisture-proof envelope securely fastened to the outside of the box. The skid and/or pallet mounting and the boxing must be done in a manner which will prevent damage during loading, shipment, unloading, storage and any associated and/or subsequent handling. If shipment is on open-air conveyance, provide weatherproof covers during shipment to protect all items.

1.10 PREPARATION FOR STORAGE

All products must be protectively processed for not less than 12-months of indoor cold storage at the destination.

1.11 WARRANTY

The Contractor must furnish to the Government, under separate cover, the manufacturer's and fabricator's standard commercial warranty for the actuator, stem, stem nuts, stem guides, pedestal, appurtenances, accessories, and parts, but not less than a minimum of 1 year warranty must be provided. Warranty period will begin on the date of acceptance at the delivery site.

PART 2 PRODUCTS

2.1 MATERIALS

All materials must be free from defects and imperfections, of recent manufacture and unused, and of the classifications and grades specified herein unless otherwise approved by the Contracting Officer. Material not specifically described, as far as practicable, conform to the latest specifications of the American Society for Testing and Materials.

2.1.1 Bronze

2.1.1.1 Bronze Castings

Bronze castings for lift nuts must meet the applicable requirements of ASTM B584 for Copper Alloy No. CA 863, CA 865, or CA 873. Bronze castings for stem guide bushings must meet the applicable requirements of ASTM B584 for Copper Alloy No. CA 863, CA 865, CA 873, or CA 932.

2.1.1.2 Silicon Bronze

Silicon bronze for fasteners must meet the applicable requirements of ASTM F468.

2.1.2 Stainless Steel

2.1.2.1 Pedestal Stainless steel plates and bars used to fabricate the pedestal must meet the applicable requirements of ASTM A276/A276M or ASTM A240/A240M for Type 304L or 316L.

Stainless steel pipe used to fabricate the pedestal must be seamless and meet the applicable requirements of ASME B36.19 and ASTM A312/A312M for 304L or 316L. Submit material certification for the pedestal prior to shipment.

2.1.2.2 Stem

Stainless steel for the stem must meet the applicable requirements of ASTM A276/A276M type 304 or 316. Submit material certification for the stem prior to shipment.

2.1.2.3 Fasteners

Stainless steel for fasteners must meet the applicable requirements of ASTM F593 and ASTM F594. Fasteners must match the same alloy group as the components in which they are in contact.

2.2 EQUIPMENT

2.2.1 Stem Stem threads must be either machine-cut or cold rolled and of the double-lead ACME type and meet the requirements of ASME B1.5. The stem and nut threads must have sufficient contact area so that the contact pressure will not exceed 5,000 psi when the maximum stem thrust is exerted. The stem thread surfaces in contact with the lift nut must have not rougher than a 63 micro-inch finish if machine cut and not rougher than a 32 micro-inch finish if roll-formed. The exterior corners of the threads, either during or after machining, must be given a slight radius of approximately 0.015-inch in order to prevent them from acting as cutting edges as the stem passes through the lift nut. The stem must be of stainless steel. Fit the stem with a tapped hole in the top end for handling. Make the tapped hole of sufficient diameter and depth for the insertion of an eyebolt of sufficient strength to pick up the entire stem from a horizontal position.

2.2.2 Pedestal

Fabricate a pedestal that meets the dimensional requirements in the contract drawings and material requirements in section 2.1.2.1. The Contractor may propose a commercial off-the-shelf pedestal as long as it can be shown that it meets the requirements of this section. Any proposed variance of the pedestal height must include a recalculation of the stem length, stem buckling calculation, and stem cover length. The pedestal base plate indicated in the contract drawings is provided by the Government.

2.2.3 Stem Guides

Stem guides must be of stainless steel, epoxy-painted cast-iron, or epoxy-painted ductile iron and bronze bushed. The bronze bushing must be machine-bored 1/16-inch to 1/8-inch larger than the stem diameter. The stem guide, including the bronze bushing, must be the two-piece collar type which can be installed and removed with the stem in place.

2.2.4 Fasteners

The quantity and size of fasteners must meet the requirements recommended by the actuator manufacturer. Thread standards must meet the requirements of ASME B1.1.

2.2.5 Stem Cover

Provide a stem cover for the slide gate actuator. The stem cover tube must be transparent and made of UV-stabilized polycarbonate or polycarbonate with an anti-UV layer coextruded or applied by the pipe manufacturer. The pipe must be of sufficient diameter to permit full travel of the stem without obstruction or binding. The bottom of the cover is to contain an adapter to be threaded into the top of the actuator to prevent rainwater entry. Provide two (2) self-stick labels made of transparent biaxially oriented polyethylene terephthalate (BoPET) with major hash marks each 1-foot increment and minor hash marks each 0.1-foot increment along the range from gate closed at zero (0) feet to fully open at four (4) feet. Make the stem cover tube 6 inches longer than required.

Do not attach the stem cover cap or apply the stem cover label. The government will cut the tube to size, attach the cap, and apply the label onsite.

2.3 ELECTRIC MOTOR DRIVEN GATE ACTUATOR

2.3.1 General

The existing slide gate must be opened and closed by means of an individual multi-turn actuator unit driven by an electric motor and mounted on the pedestal as shown on the contract drawings.

The unit must consist of complete, compact, rugged assemblies specially designed and manufactured for the required service, and be delivered completely wired, assembled and ready for installation. All parts of the lift mechanism must be designed to move the slide gate at a rate of 6 to 12 inches per minute at the working load. The actuator must be designed in conformance with the latest edition of standard practices of ANSI/AGMA 6013 or ANSI/AGMA 6113. Submit the manufacturer's Actuator Performance Test Report in conformance with SECTION 5 of AWWA C542 prior to shipment from the manufacturing facility. Actuator Performance Test Report must include the actuator and motor serial numbers.

2.3.2 Electric Gate Actuator Assembly

The electric motor for the gate actuator must have a continuous duty rating, be suitable for operation on a 240 volt, 1 phase, 60 Hz circuit, have sufficient horsepower to operate the actuator unit through the full gate travel in both directions without exceeding the full load ampere rating, and conform to applicable requirements of NEMA MG 1. All bearings must be the anti friction type. The actuator must be rated for operation in ambient temperatures between -30 degrees C and 65

.degrees C

All components including the motor, reversing contactors and overload relays, pushbuttons, indicating lights, control transformer, reductions gearing, stem lift nuts, bearings and limit switches, must be enclosed in NEMA Type 4 enclosures with an FA-14 flange that conforms to applicable requirements of MSS SP-102 and ASME B18.2.8 and mounted on a stainless steel pedestal.

Design the pedestal to position the center of the stem lift nut at 34 inches above the bottom of the pedestal. Any proposed commercial off-the-shelf pedestal that does not meet the 34 inch dimension must be accompanied by a recalculation of the stem length, stem buckling calculation, and stem cover length and will require approval of the Contracting Officer.

a. Reduction gearing must consist of generated helical gears of heat-treated steel. Worms are to be of hardened alloy steel with threads ground and polished. The worm gear must be in one piece of high strength cast bronze. Run all reduction gearing in lubricant. All gears, the stem lift nuts and other working components must be carried on heavy duty ball or tapered roller bearings adequate for all torque and thrust loads imposed by operation of the gate at the specified working load.

Provide suitable seals at all points as required to retain the lubricant. Select a motor actuator that permits manual operation of the unit in event of power failure or as necessary during servicing.

b. Provide a handwheel, and an arrow with the word "OPEN" cast on the rim of the wheel, indicating the direction of opening. Effort required to operate the actuator manually with the gate in motion must not exceed 40 pounds at the wheel rim, and 80 pounds at the wheel rim to unseat the gate. The motor actuator must include a built in clutch mechanism so that the handwheel will not rotate during motor operation nor turn the motor during manual operation.

c. The unit must include a built-in lost motion device which will permit the motor to attain full speed after which a hammer blow must be imparted to the hoisting mechanism to initiate gate motion in either the opening or closing direction of travel.

d. Supply bronze lift nuts, made in two pieces with accurately machined splines or keys and threads. The two piece nut consists of an outer member, having a flange or flanges on the exterior and splines on the interior, which mates with an inner member having splines on the exterior and threads on the interior. The outer member must be mounted in the unit housing. Secure the inner member to the outer member by either a threaded retainer ring or another suitable arrangement.

e. After the gate has been either completely closed or securely supported in the partially open position, this inner member must be capable of being easily removed by disassembling its retaining arrangement and turning the handwheel. Each stem lift nut must be adequately designed, factory tested and inspected with the stem with which it will operate. Run each nut by hand throughout the length of the stem with which it will operate. The internal thread must have the lower or non working face relieved 1/64 inch to ensure that the threads will bottom out before wedging can occur. Drill the lift nuts or otherwise provide with adequate oil recesses and passages to ensure passage of lubricant to all interior threaded surfaces of the nuts. The internal arrangement of the motor actuator units must be such that all moving parts run in lubricant, with adequate fittings and seals provided to retain the lubricant. Use lubricant per recommendations by the actuator manufacturer.

2.3.3 Position Limit Switches and Torque Switches

Provide position limit switches for stopping the gate at both the adjustable fully closed and the normal fully open positions. Provide position limit switches that are adjustable and of the intermediate gear type, governed The closing and by rotation of the motor driving mechanism.

opening travel of each gate must be protected against overload by torque-responsive mechanical switches, one for each direction of travel. The torque switches must be operative during the entire travel of the gate to protect the stem and gate against possible damage in the event an obstruction is met. The torque switches must function without auxiliary relays or other devices and be field-adjustable to ensure (1) stopping the lowering operation of the gate should the stem load for any reason become compressive to a degree greater than the normal seating requirements, and (2) stopping the raising operation should a 100 percent overload develop. Internal motor control wiring for 120 volt operation and motor power wiring for 240 volt, 1 phase, 60 Hz operation.

2.3.4 Gate Actuator Controls

2.3.4.1 Controls

Provide the switches and controls with a hinged, padlockable, vandal resistant cover of at least 1/8 inch plate thickness and of NEMA Type 4 construction.

(a) Provide switches and/or pushbuttons in one the following formats:

(1) One OPEN pushbutton and one CLOSE pushbutton that operate in self-sustaining mode. One STOP pushbutton that immediately ceases all movement, regardless of direction. Three-position selector switch for LOCAL-OFF-REMOTE. Provide legend plate.

(2) One control switch with two positions, OPEN and CLOSE. One five-position selector switch for LOCAL-STOP-OFF-STOP-REMOTE. Provide legend plate.

(b) Pilot Lights: Two (2) solid-state indicator LEDs for long life and ease of replacement with legend plates. Green for fully opened and red for the fully closed position.

(c) Legend Plates: Made of corrosion-resistant metal with permanent marking made by machine engraving or machine stamping. Hand engraving, such as would be done with an engraving pencil, is not acceptable. Plates must be screwed or bolted in place.

2.3.4.2 Internal Control Features

In addition to the limit switches specified above, provide the following control features:

(a) A motor overload protective device.

(b) A thermostatic switch to deactivate the heater above a temperature determined by the manufacturer.

PART 3 EXECUTION

3.1 PAINTING

Each actuator must be painted with a complete coating system suitable for outdoor exposure in accordance with the manufacturer's standard practice, meets the Painting and Coatings requirements of AWWA C542, is of medium gray color, and is touched up as necessary prior to shipment. Fabricated stainless steel pedestals and stem guides do not require painting. Cast iron stem guides must be painted in accordance with AWWA C560.

3.2 LUBRICATION AND LUBRICANTS

Lubricate each actuator prior to any use or operation. Lubricate each bearing through its associated lubrication fitting, and pack the gears with lubricant at assembly. After shop testing, and prior to shipment, relubricate the bearings. All lubricants must be as recommended by the actuator manufacturer and be submitted by manufacturer's name and number as part of the shop drawings.

Furnish an amount of each lubricant sufficient for two (2) lubrication changes at no additional expense to the Government.

3.3 FABRICATION

Fabricate stem and pedestal using components that meet the requirements of ASTM A6/A6M.

Include stem dimensional measurements in Quality Control Test Report to assure compliance with Table 27 and Table 29 of ASTM A6/A6M.

3.3.1 Pedestal

Welding of the pedestal must be performed by welders and welding operators qualified to AWS B2.

1/B2.1M. Submit welder qualifications prior to shipment from fabrication facility. Perform visual inspection and penetrant testing of all pedestal welds in conformance with AWS D1.6/D1.6M.

Submit the inspector's current weld inspector certification prior to shipment from fabrication facility in conformance with the provisions of AWS QC1. Submit a welding inspection report prior to shipment from fabrication facility signed by the welding inspector. Include parallelism and perpendicularity measurements in the Quality Control Test Report.

3.3.2 Stem and Stem Lift Nuts

Run each stem lift nut along the entire length of the lubricated stem to check for binding and fit.

Correct any discrepancies and retest. Include results in the Quality Control Test Report.

-- End of Section --

To:

MULTI-TURN VALVE ACTUATOR, STEM, AND PEDESTAL

Product Description

SECTION 35 20 16.54

PART 1 GENERAL

1.1 SCOPE

The work provided for herein consists of furnishing, and delivering one (1) multi-turn valve actuator, one (1) rising stem, two (2) stem guides, one (1) stem cover, and one (1) pedestal complete with all necessary accessories and appurtenances, all as shown on the contract drawings and specified herein. Provide one (1) included and one (1) spare stem lift nut, both threaded to match the stem. Installation of components under this contract will be performed by the Government. Electric actuators must meet the requirements of AWWA C542.

1.2 GENERAL REQUIREMENTS

The contract drawings indicate the requirements and general arrangement of the multi-turn valve actuator (hereafter called "actuator"), stem, stem guides, stem cover, and the pedestal. These components are replacements for existing equipment and will be installed by the Government on the existing water control structure for operating the existing cast iron slide gate at the Chippewa Diversion low flow channel in Watson, MN.

1.3 MEASUREMENT AND PAYMENT

The components will not be measured for payment. Payment will be made at the contract job price for "MULTI-TURN VALVE ACTUATOR, STEM, AND PEDESTAL." Price and payment constitute full compensation for furnishing all plant, labor, material and equipment, and preserving and delivering the actuator, stem, pedestal, stem nuts, stem guides, stem cover, and all appurtenances, accessories, and parts required.

1.4 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN GEAR MANUFACTURERS ASSOCIATION (AGMA)

ANSI/AGMA 6013 (2016B; R 2021) Standard for Industrial Enclosed Gear Drives

ANSI/AGMA 6113 (2016B; R 2021) Standard for Industrial Enclosed Gear Drives (Metric Edition)

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.1 (2024) Unified Inch Screw Threads (UN, UNR, and UNJ Thread Form)

ASME B1.5 (1997; R 2024) ACME Screw Threads

ASME B18.2.8 (1999; Stabilized 2021) Clearance Holes for Bolts, Screws, and Studs

ASME B36.19 (2022; Errata 2023) Welded and Seamless Wrought Stainless Steel Pipe

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C542 (2016; R 2021) Electric Motor Actuators for Valves and Slide Gates

AWWA C560 (2021) Cast-Iron Slide Gates

AWWA C561 (2021) Fabricated Stainless-Steel Slide Gates

ASTM INTERNATIONAL (ASTM)

ASTM A6/A6M (2026) Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

ASTM A240/A240M (2026) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A276/A276M (2025) Standard Specification for Stainless Steel Bars and Shapes

ASTM A312/A312M (2025) Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A484/A484M (2024b) Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings

ASTM B584 (2022) Standard Specification for Copper Alloy Sand Castings for General Applications

ASTM F593 (2024) Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs

ASTM F594 (2024) Standard Specification for Stainless Steel Nuts

AMERICAN WELDING SOCIETY (AWS)

AWS B2.1/B2.1M (2026) Specification for Welding Procedure and Performance Qualification

AWS D1.6/D1.6M (2017) Structural Welding Code -- Stainless Steel

AWS QC1 (2016) Specification for AWS Certification of Welding Inspectors

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY

(MSS)

MSS SP-102 (2024) Multi-Turn Valve Actuator Attachment

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2024) Motors and Generators

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-2-2610 (2025) Engineering and Design - Mechanical and Electrical Design for Lock and Dam Operating Equipment

1.5 DESIGN

Design load, extreme load, rated load, and working load are defined in the Chippewa Low Flow Gate Machinery Calculations document, provided in the appendix. The Chippewa Low Flow Gate Machinery Calculations document is for reference only. The Contractor is required to verify all calculations using actuator manufacturer data, stem guide manufacturer data, and material property values from the mill test reports for the stem and pedestal. The calculations document and this specification section contains the required standards, formulas, and parameters. The system must be able to move the gate at a rate of 6 to 12 inches per minute at the working load.

1.5.1 Actuator

The actuator must meet the applicable requirements of AWWA C542 and be a product of a manufacturer who has been engaged during the past ten (10) years in the production of actuators that comply with AWWA C542. Submit an Actuator Manufacturer Qualification Memo, prior to shipment from the manufacturing facility and signed by a manufacturing company officer, attesting to at least ten (10) years experience manufacturing actuators that comply with AWWA C542. The actuator must be able to produce the working load plus an additional 20 percent reserve capacity.

The effect of the stem factor in selecting the motor/actuator assembly must be calculated using the stem factor formula in AWWA C560 with a minimum coefficient of static friction for lubricated surfaces of 0.15. Submit Actuator Dimensional Outline Drawings and Data prior to ordering

.actuator

1.5.2 Stem

Fabricate the stem from solid stainless steel as specified in PART 2.1 MATERIALS. Submit Stem Data and Calculations using the formulas, thread designation, design criteria, loads, and factors of safety given in the Chippewa Low Flow Gate Machinery Calculations document and contract drawings prior to fabrication of the stem. The Contractor may propose a commercial off-the-shelf pedestal as long as it can be shown that it meets the requirements of this section.

1.5.3 Pedestal

The pedestal must meet or exceed the strength requirements of EM 1110-2-2610 for tension, compression, and buckling. The pedestal must be designed with a minimum safety factor of 5 applied to the actuator's rated load with regard to the ultimate tensile strength of the material. The pedestal must be designed for a unit stress not to exceed 75% of the yield strength of the material used when subjected to the actuator's extreme load. The pedestal must be designed to withstand buckling with a minimum factor of safety of 3 applied to the maximum working load, using the Euler or J.B. Johnson formulas, as appropriate. Submit Pedestal Data and Calculations prior to fabrication of the pedestal.

1.5.4 Stem Guides

Stem guide components must be designed to withstand 2 percent of the rated load of the actuator assembly and must meet the requirements of AWWA C560 or AWWA C561. Submit Stem Guide Data and Calculations prior to fabrication of stem and pedestal.

1.6 WORKMANSHIP

All workmanship, whether in the factory or the field, must be performed in a skillful and professional manner by qualified mechanics under competent supervision and direction and in accordance with the best modern practice for the various trades involved and for the manufacture of high-grade machinery. All parts must have accurately machined mounting and bearing surfaces so that they can be assembled without fitting, chipping or re-machining. All parts must conform to the design dimensions and be free of defects in either workmanship or material that will impair their service. All attaching bolt holes must be accurately drilled to the layout indicated on the shop drawings and actuator dimensional outline drawings and data.

1.7 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Shop Drawings; G, ME

Actuator Dimensional Outline Drawings and Data; G, ME

Furnish the Contracting Officer for their review and approval dimensional outline drawings, catalog data and other information and calculations which will include at least the following:

(1) Name of actuator manufacturer.

(2) Model number and weight.

(3) Dimensional drawing.

(4) Descriptive bulletin, including a breakaway drawing illustrating all operating components, a parts list and materials of construction.

(5) Strength and durability HP ratings per ANSI/AGMA 6013 or ANSI/AGMA 6113.

(6) The electric motor's HP rating, the starting, running, and locked rotor torques, full load and locked rotor amps.

(7) The rated load of the actuator.

(8) The extreme (locked rotor) load of the actuator.

(9) Equipment sizing calculations, including all related factors and supporting literature.

(10) Control wiring diagram.

(11) Actuator Torque Switch Range and Settings

SD-03 Product Data

Actuator Manufacturer Qualification Memo

SD-05 Design Data

Stem Data and Calculations; G, ME

Pedestal Data and Calculations; G, ME

Stem Guide Data and Calculations; G, ME

Gate Lift System Checks And Tests; G, ME

SD-06 Test Reports

Welding Inspection Report

Quality Control Test Report; G, ME

Actuator Performance Test Report; G, ME

SD-07 Certificates

Welder Qualifications

Weld Inspector Certification

Material Certification; G

SD-10 Operation and Maintenance Data

Provide both an electronic (PDF) and a hard copy of Operation and Maintenance Manuals. All manuals and parts lists must be bound separately, be approximately 8-1/2 inches by 11 inches, printed on good quality paper and bound between flexible, durable covers. Drawings incorporated in the manual and/or parts lists may be reduced to page size provided they are clear and easily legible, or may be folded into the manual to page size. Photographs and/or catalog cuts of components may be included for identification. Submit the operation and maintenance manual and parts lists no later than the time of shipment of the gate actuators.

Installation Manual; G, ME

Operation And Maintenance Manuals; G, ME

1.8 SUBMITTAL DESCRIPTIONS

The following subparagraphs describe in detail the submittals pertaining to the work specified in this section.

1.8.1 Shop Drawings

Submit complete shop drawings of the actuator, stem, stem nuts, stem guides, stem cover with label, pedestal, appurtenances, accessories, and parts to the Contracting Officer for approval.

Submit drawings of items made specially or specifically for this project prior to fabrication. Submit drawings or catalog cuts of standard manufactured articles prior to ordering. Drawings of any items made specially or specifically for this project must be true shop drawings, but catalog cuts are sufficient for standard manufactured articles, and outline drawings of such equipment may be used in the assembly drawings. However, for those items for which true shop drawings are not required, sufficient descriptive data and/or other information, in addition to the catalog cuts, must be submitted to demonstrate compliance with the specifications.

1.8.2 Installation Manual

Prior to shipment of the gate actuator to the shop performing gate lift system testing, submit a copy of the actuator manufacturer's standard manual in electronic format (PDF) describing procedures to be followed in installing and adjusting the gate actuators. The installation manual must be of such a nature that it may be comprehended by an engineer or mechanic without extensive experience installing equipment of this type. The description must be a step by step explanation of operations required, and include, where applicable, such things as bolt torque values, actuator pre-assembly, electrical connections, commissioning procedures, functional checks, position and limit switch settings, adjustments, and similar details.

1.8.3 Operation and Maintenance Manuals

Submit both electronic (PDF) copies and hard copies of all operation and maintenance, lubrication, and repair manuals for all equipment. Furnish operation and maintenance manuals containing complete information in connection with the operation, lubrication, adjustment, routine and/or special maintenance, disassembly, repair and reassembly of the electric motor driven gate actuators and appurtenances furnished under this section. Furnish copies of the manufacturer's spare parts lists and/or bulletins for the gate actuators and appurtenances. Clearly show all details and parts, and adequately describe all parts or have proper identification marks. Submit the operation and maintenance manual and parts lists at the time of shipment of the gate actuators.

1.8.4 Quality Control Test Report

Submit a Quality Control Test Report of the stem, stem lift nuts, and pedestal prior to shipment from fabrication facility. Report dimensional checks of the stem, stem lift nuts, and pedestal.

Dimensional values are provided in the contract drawings. Meet the tolerance requirements of

ASTM A484/A484M.

1.9 PREPARATION FOR SHIPMENT

Prior to shipment, prepare all equipment and parts for shipment as described herein. All large, bulky and/or heavy, greater than 100 pounds, elements must be mounted on skids or pallets of ample size and strength to facilitate loading and unloading. Pack all small parts in sturdy wood or heavy corrugated paperboard boxes. Provide a packing list, indicating the contents of each such box and enclose in a moisture-proof envelope securely fastened to the outside of the box. The skid and/or pallet mounting and the boxing must be done in a manner which will prevent damage during loading, shipment, unloading, storage and any associated and/or subsequent handling. If shipment is on open-air conveyance, provide weatherproof covers during shipment to protect all items.

1.10 PREPARATION FOR STORAGE

All products must be protectively processed for not less than 12-months of indoor cold storage at the destination.

1.11 WARRANTY

The Contractor must furnish to the Government, under separate cover, the manufacturer's and fabricator's standard commercial warranty for the actuator, stem, stem nuts, stem guides, pedestal, appurtenances, accessories, and parts, but not less than a minimum of 1 year warranty must be provided. Warranty period will begin on the date of acceptance at the delivery site.

PART 2 PRODUCTS

2.1 MATERIALS

All materials must be free from defects and imperfections, of recent manufacture and unused, and of the classifications and grades specified herein unless otherwise approved by the Contracting Officer. Material not specifically described, as far as practicable, conform to the latest specifications of the American Society for Testing and Materials.

2.1.1 Bronze

2.1.1.1 Bronze Castings

Bronze castings for lift nuts must meet the applicable requirements of ASTM B584 for Copper Alloy No. CA 863, CA 865, or CA 873. Bronze castings for stem guide bushings must meet the applicable requirements of ASTM B584 for Copper Alloy No. CA 863, CA 865, CA 873, or CA 932.

2.1.1.2 Silicon Bronze

Silicon bronze for fasteners must meet the applicable requirements of ASTM F468.

2.1.2 Stainless Steel

2.1.2.1 Pedestal Stainless steel plates and bars used to fabricate the pedestal must meet the applicable requirements of ASTM A276/A276M or ASTM A240/A240M for Type 304L or 316L.

Stainless steel pipe used to fabricate the pedestal must be seamless and meet the applicable requirements of ASME B36.19 and ASTM A312/A312M for 304L or 316L. Submit material certification for the pedestal prior to shipment.

2.1.2.2 Stem

Stainless steel for the stem must meet the applicable requirements of ASTM A276/A276M type 304 or 316. Submit material certification for the stem prior to shipment.

2.1.2.3 Fasteners

Stainless steel for fasteners must meet the applicable requirements of ASTM F593 and ASTM F594. Fasteners must match the same alloy group as the components in which they are in contact.

2.2 EQUIPMENT

2.2.1 Stem Stem threads must be either machine-cut or cold rolled and of the double-lead ACME type and meet the requirements of ASME B1.5. The stem and nut threads must have sufficient contact area so that the contact pressure will not exceed 5,000 psi when the maximum stem thrust is exerted. The stem thread surfaces in contact with the lift nut must have not rougher than a 63 micro-inch finish if machine cut and not rougher than a 32 micro-inch finish if roll-formed. The exterior corners of the threads, either during or after machining, must be given a slight radius of approximately 0.015-inch in order to prevent them from acting as cutting edges as the stem passes through the lift nut. The stem must be of stainless steel. Fit the stem with a tapped hole in the top end for handling. Make the tapped hole of sufficient diameter and depth for the insertion of an eyebolt of sufficient strength to pick up the entire stem from a horizontal position.

2.2.2 Pedestal

Fabricate a pedestal that meets the dimensional requirements in the contract drawings and material requirements in section 2.1.2.1. The Contractor may propose a commercial off-the-shelf pedestal as long as it can be shown that it meets the requirements of this section. Any proposed variance of the pedestal height must include a recalculation of the stem length, stem buckling calculation, and stem cover length. The pedestal base plate indicated in the contract drawings is provided by the Government.

2.2.3 Stem Guides

Stem guides must be of stainless steel, epoxy-painted cast-iron, or epoxy-painted ductile iron and bronze bushed. The bronze bushing must be machine-bored 1/16-inch to 1/8-inch larger than the stem diameter. The stem guide, including the bronze bushing, must be the two-piece collar type which can be installed and removed with the stem in place.

2.2.4 Fasteners

The quantity and size of fasteners must meet the requirements recommended by the actuator manufacturer. Thread standards must meet the requirements of ASME B1.1.

2.2.5 Stem Cover

Provide a stem cover for the slide gate actuator. The stem cover tube must be transparent and made of UV-stabilized polycarbonate or polycarbonate with an anti-UV layer coextruded or applied by…