addendum-3-rfp-des-2025-02.pdf

Little Bog Pond Dam & Lower Trio Pond Dam

Reconstruction Project

Addendum #3

Please find the following ADDENDUM #3, dated September 9th, 2024, for the Little Bog Pond Dam & Lower

Trio Pond Dam Reconstruction Project which is to be included as part of the Contract Documents thereof.

As per Specification Section 00200, Article 13.09 the bid shall contain an acknowledgment of receipt of this

Addendum #3, (and all addenda). The number and date of which shall be filled in by filling out the information in the space provided in Section 00301 – Bid Form, Article 3 – 3.01A.

Please note bids are due Thursday, September 12th, 2024, at 2:00 PM (EST). Hard copy bids may be received as stipulated in the Contract Documents. This Addendum has been issued to address Prospective Contractor

Questions on the Contract Drawings and Specifications.

ITEM #1: Response to Contractor Questions

1. Please confirm no Davis Bacon or Prevailing wages are required for the project. Please see response in

Addendum #1 for clarifications on prevailing wages.

“The expected total cost of the project is estimated to be less than $10 million and therefore Section 00805 Article 3 SC-103.06a I. Federal Requirements is not applicable…”

2. Can you please provide information or brand and model for the backflow preventer for the spillway draining system shown on drawing S-103 and S-203? We can’t seem to find any information in drawings or spec book. At the 4-in HDPE piping outlets use HydroGate Model 50c 4-in Flap Gate or approved equal. For the 8-in underdrain piping outlets use RedValve Checkmate UltraFlex 8-in In-Line

Check Valve or approved equal. See Figure 1 below; product brochures for each are included as attachments.

Figure 1. Screenshot of Section A on Sheet S-203 showing location of flap gate and backflow preventer.

GEI Consultants, Inc. 1 | P a g e

Attachments:

Attachment #1 – Hydro Gate Product Data

Attachment #2 – Red Valve CheckMate UltraFlex Product Data

GEI Consultants, Inc. 2 | P a g e

FLAP GATES

TABLE OF CONTENTS

FLAP GATES

Applications

Description.................................................................................................................................................................................................................................................................................1-3

HEAVY DUTY FLAP GATES

Features

Description

Dimensional Data................................................................................................................................................................................................................................................................... 5-6

Specifcations............................................................................................................................................................................................................................................................................6-7

FLEXIBLE (RUBBER) FLAP GATES

Applications

Description

Features

Specifcations

Description

DESCRIPTION

Hydro Gate® fap gates are made of cast iron or ductile iron, depending on the type of service. A small diferential pressure on the back of the gate causes it to open automatically to allow discharge through levees, sewer lines or drainage conduits. When water on the face side of the gate rises above water on the back side, the gate closes automatically to prevent backfow.

Flap gates are equipped with fat-back seats for attaching to wall thimbles, new concrete headwalls, existing walls or pipe fanges. The seat or frame of the fap gate is attached to a wall or pipe fange and forms the opening through which water passes. Since the gate opens or closes automatically, a mechanical lifting device is not necessary.

Automatic drainage gates must be kept clean if they are to function correctly. The hinged fap acts as a natural skimmer to cause timber, logs or trash to catch between the fap and the seat at low fow.

Periodic inspection and cleaning should be scheduled when the water fowing through the fap gate carries foating material.

To make the gate more self-cleaning, it should be mounted 12 to 18".

above the apron in front of the gate. This allows room at the bottom for foating material to work its way out and makes the gate fap somewhat self-cleaning.

SEAT (FRAMES)

A seat (or frame) is a one-piece casting. The seating face is cast and machined at an angle of vertical so that the hinged cover has a horizontal force component to completely seat the gate by gravity.

Corrosion-resistant seating faces are pneumatically impacted into dovetail grooves for heavy-duty gates. All seating faces (above 4" diameter) are machined fat and to a 63 micro-inch fnish.

When rubber seats are specifed, the gumdrop cross-section rubber seal is locked into a deep dovetail groove in the seat.

FLAPS (COVERS)

Flaps are iron castings of reinforced fat plate design. Reinforcing ribs (both horizontal and vertical) are cast integrally along with bosses for the hinges.

Corrosion-resistant seating faces are attached as described in the previous section for frames.

FLAP GATES

24" HEAVY DUTY FLAP GATE

APPLICATIONS

• Flood Control

• Municipal Projects

• Farm Levees

• Sewer Outfalls

• Industrial Waste Lines

• Water and Sewage Treatment Plants

• Tidal Drainage

• Irrigation Systems

• Pump Discharge Control

DOUBLE-HINGE ACTION

For proper seating of a fap gate, double-hinge action is necessary.

The main hinge action on any fap gate is about its upper pivot points.

However, fexibility is required at the bottom pivot points to allow seating of the fap against the seat. All Hydro Gate® fap gates have this double action with bushings at each pivot point.

It is necessary that bottom hinge action be limited. Otherwise, the fap can turn completely over on itself and wedge back in the opening of the gate seat, rendering the gate useless. Heavy-duty circular opening fap gates are provided with hinge arms extending beyond the bottom pivot point. This limits the double-hinge action and prevents the fap from being rotated outward at the bottom. In addition, the bottom end of each hinge arm has a fne adjustment bolt to further limit the double-hinge action. Square or rectangular opening fap gates are also provided with extended links for fne adjustment even though the bottom of the fap cannot be turned into the gate opening as in the round gates.

LUBRICATION OF PIVOT POINTS

Lubrication of pivot points on fap gates is usually not necessary.

The construction of the hinge assembly permits only a few degrees of rotation at the bottom pivot points. The gate cover rotates about the upper pivot points through an arc of 90° or less. With this limited rotation, lubrication of bushings is usually not justifed nor is it normally recommended. When lubrication of fap gate pivot points is desired, two methods can be used:

1. A permanently lubricated bushing is installed at the factory. If lubrication of pivot points is desired, the permanently lubricated bronze bushing is recommended; or

2. Links or hinge arms can be drilled for zerk-type grease fttings for use with ordinary grease guns.

LOSS OF HEAD THROUGH FLAP GATES

Tests conducted on fap gates show that the loss of head due to the fap riding on the water is very small compared with other losses in the hydraulic structure. Of these head losses, the entrance loss is usually considerably more critical than loss at the fap gate on the outlet end of the conduit.

The Hydraulic Laboratory of the State University of Iowa conducted a series of tests to determine the amount of head lost by water discharging through Model 10C fap gates (formerly Armco-Calco).

The gates — 18, 24 and 30" in diameter — were supplied from commercial stock.

The following passage is excerpted from the report of Floyd A. Nagler, associate professor of mechanics and hydraulics, who supervised the tests.

“Based on these experiments the following empirical formula was derived to express the loss in head through Calco Gates of varying sizes and with diferent velocities of fow:

L = loss of head in feet v = velocity of fow through gate in feet per second d = diameter of outlet in feet e = base of natural logarithms g = acceleration of gravity, 32 ft / sec / sec

L = 4v2 e -1.15v (—) (—)g √d

It may be concluded from these experiments that the Calco gate in its hydraulic characteristics is all that the manufacturers have claimed for

it. The small loss in head obtained through these gates demonstrates that their installation has little efect on the discharged capacity of drainage outlets.”

Heavy-duty fap gates have heavier faps or covers than the gate model tested. As a result, head losses through these gates may be slightly more than those indicated by the tests.

ATTACHMENT TO CONCRETE WALL OR PIPE FLANGE

Since fap gates open when subjected to a back pressure, only a small unseating force is encountered. When a fap gate is under face or seating head, the force of the water pushes against the cover and only the weight of the gate itself is on the attaching bolts or anchors. For this reason, fasteners are needed only to hold the gate on the wall or fange. There is no hydrostatic force tending to separate the gate from the wall or fange.

In attaching a round heavy-duty fap gate to a pipe fange, the gate is partially drilled to match a 125 lb. ASME bolt circle with only a portion of the holes being used. The cost to full drill the gate seat, mate every hole in the fange, and furnish the additional corrosion-resistant bolts and install them is not justifed.

Flanges must be installed perfectly fat. Any warpage of a fange is transferred to the gate seat, preventing the fap to seat properly, particularly at low diferential head. (Perfectly fat is generally defned as within plus or minus 1/64" of a true theoretical fat plane.)

ADJUSTABLE TOP PIVOT POINTS

For the adjustable pivot point on Hydro Gate® heavy-duty and medium-duty fap gates, four holes are drilled and tapped – two per side – in the fat ears at the top of the gate seat (see Figure 6-1).

Threaded studs are screwed into these holes and are securely locked in position.

A double-eared adjustable pivot lug is then placed on these two studs, and hex nuts are placed on both sides of the bosses. Another double set of ears projects to the top of the pivot lug for mounting of the hinge arms. A bushing in the hinge arm works on the body of the assembly pin. This arrangement allows the assembly pins through all pivot points to be in double shear for added strength and also provides for minimum lateral movement of the fap during gate operation.

With the double-nut arrangement on each stud, the top pivot lug can be moved in and out from the wall to vary the location of the top pivot point with respect to the seating face of the gate. All adjusting can be accomplished without removing the gate fap cover from the gate, as is necessary for other pivot arrangements.

The force required to open the gate increases as the pivot lug is moved back toward the wall. When the gate is in a tidal zone or when the gate is partially submerged, the pivot lug can be moved back as far as possible so that the weight of the fap keeps the gate closed. Where less pressure is needed to operate the gate, the pivot lugs are moved farther away from the wall.

STAINLESS STEEL BUMPER (OPTIONAL)

Gates mounted on a pump discharge pipe (not mounted on a head wall) or mounted in an area where excessive velocities occur should be specifed to have a spring bumper (swing) to prevent the cover from being thrown over center over top of gate thus preventing the gate from closing automatically. It also prevents personal injury caused by a fap that is balanced or teetering over center. Designed for gate seat or wall mounting, depending on application or gate size.

ANTI-SWAY BAR

The anti-sway bar creates a uniform and rigid hinging operation of the gate by tying together all four hinge points. This prevents the gate components from “shaking themselves” loose and progression to failure.

LEAKAGE

Leakage through fap gates decreases as head increases. At very low heads, there may be insufcient force to fully efect a tight, intimate ft of the seats, and somewhat greater leakage is likely.

OPENING PRESSURE

Any signifcant depth of water behind the gate will cause the cover to unseat a crack and allow drainage. The pivot lug can be adjusted for more or less sensitivity. When adjusted for less sensitivity, greater depth of water (back pressure) will be needed to crack the gate open.

Generally, fap gates cannot hold more than a few inches of backwater for an extended length of time.

SAFETY NOTICE

Gates (particularly smaller gates) in public areas should be fenced since children playing on or around them can lift the covers and be injured at the cover’s pinch points.

Pivot Adjusting Nuts

Threaded Adjusting Studs

Adjustable Pivot Lug

Mounting Holes

Seating Face

Pin Bushing

Stainless Hinge Pin

Stainless Pin Washer

Link Arm Stainless Cotter Pin Cover

Lower Adjusting Mechanism

FIGURE 6-1

ADJUSTABLE TOP PIVOT AND LINK ASSEMBLY

HEAVY DUTY FLAP GATES

60" X 36" RECTANGULAR FLAP GATE INSTALLATION

FEATURES

• Model 50C (Circular)

• Model 50 (Square or Rectangular)

• Seating heads to 50'

• Round, square or rectangular opening

• Flat-back, corrosion-resistant fasteners

• Ductile iron links and lugs

DESCRIPTION

Flat-back seats are for attaching the gate to a concrete wall pipe fange or wall thimble. The back of this gate seat is machined to a plane and drilled. Studs or anchor bolts should be of the same material as gate assembly bolts.

Heavy-duty fap gates have fully adjustable top pivot points. Through the use of two threaded studs, the top pivot point can be moved laterally from the wall to adjust the sensitivity of the gate or to compensate for slight misalignment in installation. The threaded studs with double-locking nuts allow adjustment to be accomplished without disassembly of the gate. By moving the top pivot point back, additional head is required to open the gate as the weight of the fap keeps the gate closed and reduces futtering action caused by waves. Links or hinge arms are ductile iron and holes at pivot points are bronze bushed. The hinge pins through the links are in double shear due to double-eared pivot lugs at the top of the link and double bosses on the fap at the bottom. All fasteners are furnished in Type 316 stainless steel, for all environmental applications.

A lifting eye is cast integrally with the fap cover to permit manual operation or to hold the gate open. A rubber seating face is recommended in the gate seat if the gate is attached to the discharge end of a pump where slamming action will occur. The seating face on the cover is bronze. This corrosion resistant face is machined to a plane and makes contact with the rubber on the seat when the gate is closed. The rubber face on the seat is set in a machined dovetail groove that holds it frmly in position without the aid of bolts, pins or adhesive. The rubber face acts as a cushion for the fap as it closes under moderate slamming action. These gates are exceptionally watertight under higher face pressures because of slight deformation of the rubber faces.

FABRICATED HEAVY DUTY FLAP GATES

Our team has the capability to provide a fabricated version of the Heavy Duty Flap Gate for special applications. This type of gate can accommodate odd size requirements or enhanced corrosion resistance than the cast iron line. Fabricated Flap Gates are ofered in aluminum, stainless steel, or carbon steel and are designed with rubber seating faces. The fabricated version of the fap gate is designed to have the same functionality and performance as the cast iron version.

Dimensional Data

FIGURE 6-2

HEAVY-DUTY FLAP GATE (MODEL 50C)

MODEL 50C ROUND OPENING

FOR HEADS TO 50 FT

DIAMETER (IN.)

OPENING SIZE DIA. (IN.) A B C

DIAMETER (IN.)

OPENING SIZE DIA. (IN.) A B C

PIVOT RADIUS (IN.)

12 16.75 14 19.75 15 20.31

21 28.00 14.00 16.50 27.38 24 32.00 16.00 19.25 31.25 27 34.75. 17.38 21.25 36.00

9.00 11.00 13.50

4.50 5.25

16.00

5.50 6.75 8.00

8.25 9.50 9.75

7.31 11.75 14.00 15.25

19.00 9.50 10.25

21.25 10.63 12.50

22.25 11.13 12.50

23.50 11.75 13.00

24.75 12.50 15.75

27.50 13.75 16.25

21.25 25.00 26.25

PIVOT RADIUS (IN.)

Pivot Radius

A

B

C

30 38.75 19.38 23.25 38.50 36 46.00 23.00 27.50 45.50 42 53.00 26.50 32.50 53.50 48 59.50 29.75 37.75 61.75 54 66.25 33.25 39.75 67.25 60 73.00 36.50 46.00 76.00

80.00 86.50 93.50

40.00 43.25 46.75

50.00 54.25 58.25

83.00 90.00 97.00

84 100.00 50.00 62.25 104.25 90 106.50 53.25 65.50 111.25 96 113.25 56.63 65.50 117.25

108 125.00 62.50 75.13 129.75 zservinski Highlight zservinski Highlight 9.00 zservinski Highlight 4.50 zservinski Highlight .25 zservinski Highlight zservinski Highlight 7.31 zservinski Highlight

MODEL 50C ROUND OPENING

Dimensional Data

MODEL 50C ROUND OPENING

FOR HEADS TO 50 FT

DIAMETER (IN.)

OPENING DIA. (IN.) A B C PIVOT RADIUS (IN.)

12 x 12 18.00 9.00 11.25 18.25 18 x 18 25.00 12.50 15.75 25.00 24 x 24 32.00 15.00 19.25 31.25 30 x 18 37.00 12.50 15.75 25.00 30 x 30 40.50 18.75 25.75 40.25 36 x 24 44.00 16.00 21.00 31.25 36 x 36 44.00 22.00 27.50 45.25 42 x 30 52.00 19.25 23.25 38.25 42 x 42 52.00 25.00 32.50 53.25 48 x 24 56.00 16.00 19.00 29.25 48 x 36 56.00 22.00 27.50 46.50 48 x 48 58.00 29.00 37.75 61.75 54 x 36 63.00 22.50 27.50 47.50 54 x 54 64.00 32.00 39.75 66.75 60 x 30 68.00 19.00 24.25 39.75

DIAMETER (IN.)

OPENING DIA. (IN.) A B C PIVOT RADIUS (IN.)

60 x 36 70.00 23.00 29.00 48.75 60 x 48 70.00 29.00 37.75 61.75 60 x 60 70.00 35.00 45.75 75.75 66 x 42 76.00 26.00 32.75 53.50 66 x 66 76.00 38.00 52.00 85.00 72 x 48 82.00 29.00 37.75 61.75 72 x 60 82.00 35.00 45.75 75.75 72 x 72 82.00 41.00 54.75 90.50 84 x 60 94.00 35.00 46.00 75.75 84 x 84 94.00 47.00 62.25 104.00 96 x 60 108.00 36.00 46.00 76.00 96 x 84 108.00 48.00 62.50 104.00 96 x 96 108.00 54.00 69.00 117.00

108 x 108 120.00 60.00 76.00 138.00 120 x 120 132.00 60.00 81.00 149.00

Pivot Radius

A

B

C

FIGURE 6-3

HEAVY-DUTY FLAP GATE (MODEL 50)

SPECIFICATIONS

GENERAL

Flap gates and accessories shall be of the size, material and construction shown on the drawings and specifed herein. They shall be Hydro Gate® heavy-duty fap gates or approved equal, with circular, square or rectangular openings. Similar installations shall have operated successfully for fve years or more. All component parts shall be of the type material shown in the “Materials” section of this specifcation. The Material Combination Number applicable to each gate shall be shown in the “Gate Schedule.”

SEAT

The seat shall be fat back and shall be cast in one piece with a raised section around the perimeter of the waterway opening to mount the seating faces. The raised section shall provide a seating plane diverging top to bottom from the plane of the mounting fange to assist in positive closure of the cover. The seat shall be shaped to provide two bosses extended above the top of the waterway opening for mounting the pivot lugs. Pivot lug bosses shall be drilled and tapped for

Specifcations mounting studs. The back of the seat shall be machined to a plane and drilled to mate the anchor or stud layout. Gates attached to concrete shall be mounted on anchor bolts and grouted in place.

COVER

The cover shall be cast in one piece with necessary reinforcing ribs, a lifting eye for manual operation, and with bosses to provide a pivot point connection with the links. Bosses shall be designed to place the hinge pins in double shear when the gate is assembled.

SEATING FACES

A full-width, dovetail slot shall be machined around the perimeter of the cover and the seat. Corrosion-resistant dovetail seating faces shall be mounted in the slot and held securely without use of screws or other fasteners. The seating faces shall be machined to a plane with a minimum 63 micro-inch fnish.

Flap gates subjected to pump discharge slamming action shall have a rubber seating face on the seat. Rubber seating faces shall be mounted in a dovetail slot and held securely without use of pins or screws. The seating face on the cover shall be as specifed in the previous section.

PIVOT LUGS

Each pivot lug shall be cast in one piece. Lugs shall have double bosses to place the top hinge pins in double shear when they are assembled through the link. The lugs shall be adjustable in the horizontal plane without removal of the cover from the gate links. The adjustment shall allow the top pivot point to be moved toward the gate seat for reduced sensitivity of the cover, or moved away from the gate seat to provide opening with minimum diferential head. Two corrosion-resistant studs shall be used to connect each pivot lug to the gate seat.

LINKS

The links connecting the cover and pivot lugs shall be heavy duty and cast in one piece. Each link shall be provided with commercial grade, corrosion-resistant bushings at each pivot point. The bottom of the links shall be provided with an adjusting screw to properly align seating faces on the cover with respect to the seat. The links shall be designed to limit the double hinge action, preventing the cover from rotating sufciently to become wedged in the open position.

FASTENERS

All anchor bolts, assembly bolts, screws, studs and nuts shall be of ample size to safely withstand the forces created by operation of the gate under the heads shown in the “Gate Schedule”. Quantity and size of the fasteners shall be recommended by the manufacturer. Anchor bolts shall be furnished with two nuts each to facilitate installation and alignment of the gates when attached to concrete.

PAINTING

Machined surfaces shall be coated with a water-resistant, rust-preventive compound. All cast iron parts shall be shop cleaned and painted in accordance with the manufacturer’s standard practice.

DRAWINGS FOR APPROVAL

Drawings showing the dimensions and details required to locate and install the component assemblies shall be submitted for the engineer’s approval prior to fabrication.

INSTALLATION

Installation of all parts shall be done by the contractor in a workmanlike manner and in accordance with the manufacturer’s instructions. It shall be the contractor’s responsibility to handle, store and install the gate in strict accord with the manufacturer’s drawings and recommendations.

MATERIALS

Hydro Gate® Flap Gates are manufactured in one standard material combination, as listed below. Various components of the fap gate are available in other materials when absolutely required by the customer. Any material variations are subject to additional costs.

Optional materials listed below are not necessarily all inclusive. Please contact our Engineering Department for any additional clarifcation on optional materials.

Seat and Cover

Standard Materials: Cast Iron, ASTM A126, Class B

Optional Materials: Austenitic Gray Iron (Ni-Resist), ASTM A436 Ductile Iron, ASTM A536 Grade 80-55-06

Seating Faces

Standard Materials: Silicon Bronze, ASTM B98, Alloy 651

Optional Materials: Neoprene, ASTM D2000, Grade 1BE625

Pivot Lugs

Standard Materials: Ductile Iron, ASTM A536 Grade 80-55-06

Optional Materials: Austenitic Gray Iron (Ni-Resist), ASTM A436

Links

Standard Materials: Ductile Iron, ASTM A536 Grade 80-55-06

Optional Materials: Austenitic Gray Iron (Ni-Resist), ASTM A436 Stainless Steel, ASTM A276, Type 304 or 316

Bushings

Standard Materials: Bronze, ASTM B584, Alloy 932

Optional Materials: Self-Lubricating Bronze, (various) Stainless Steel, ASTM A276, Type 304 or 316

Fasteners

Standard Materials: Stainless Steel, ASTM F593 (Bolts), Alloy Group 2, Type 316

FLEXIBLE (RUBBER) FLAP GATES

APPLICATIONS

• Very low unseating head requirements

• Pump discharge

• Coastal tide basin drainage

• Combined sewage overfow requirements

DESCRIPTION

Flexible Flap Gates are manufactured with a stainless steel frame and a reinforced neoprene cover. To aid in the sealing of the gate, a fexible neoprene seal is mounted to the stainless steel frame.

These gates are quiet operating and require very little maintenance.

Should debris collect behind the cover it is easily removed or fushed out. These gates are ideally suited for pump discharge and wave action. There are no hinge pins to wear out and they never need painting. The Flexible Flap Gate can be mounted to a fabricated wall thimble or to a concrete wall with the incorporation of a grout pad.

These gates are available in a variety of sizes. For the minimum and maximum gate sizes available, please consult our Engineering staf.

When specifying Hydro Gate® Flexible Flap Gates be sure to consider the characteristics of the water, the gate’s function, the opening size and the maximum head requirements. Our Engineering staf is experienced in answering any of the questions you may have concerning the design and use of the Flexible Flap Gate.

FEATURES

• Stainless steel frame (seat)

• Flexible fber reinforced neoprene cover (fap), one inch thick for most applications

• Stainless steel reinforcing angles bolted to cover with full width stainless steel backer bar

• Resilient neoprene hollow bulb seal bolted to frame for seating seal

• Flexible continuous hinge integral with neoprene cover

DESIGN AND APPLICATION FEATURES

• Simple rugged design

• Low head loss, low cracking pressure, self draining

• Quiet operation, no slamming metal to metal

• Withstands pump discharge and reverse fow slamming and wave action

• Tolerates debris, cover molds around objects

• Corrosion resistant to most water born contaminates, resistant to algae and marine growth

• No painting, no lubrication, no broken hinges, links or worn pins

• Smooth design for easy fushing

Hydro Gate rubber fap gates are best suited for wall mounting on anchor bolts and grout pad. They can also be mounted on a fabricated or cast iron thimble; however, the back fange is unmachined which requires heavy layer of mastic or a thick soft gasket to seal the fange joint.

Gates larger (width or height) than 42" may require seaming and bonding of the rubber fap due to available rubber sheet width.

Multiple gate openings or multiple gates may be used in lieu of a seamed rubber cover. Multiple gate openings prevent debris from catching in the frame members.

Contact our Engineering Department for recommendations for your specifc application.

Specifcations

Lifting Eye (2 Required)

Heavy Clamp Angle and Serrated Spacer Bar

Flexible Solid Neoprene

Fabricated Stainless Steel Frame (Seat)

Stainless Steel Reinforcing Angles Designed for Seating Head

Lifting Eye

Resilient Neoprene Seal Bolted to Sides and

Bottom of Frame

RUBBER FLAP GATE — SECTION VIEW

SPECIFICATION FOR

FLEXIBLE (RUBBER) FLAP GATE

Flexible fap gates shall be of size and material grades as specifed herein and as shown on drawings and gate schedule. They shall be Hydro Gate® Flexible Flap Gate or approved equal. They shall be square or rectangular or multiple opening style.

FRAME

Frame shall be fabricated from stainless steel type 304. The frame shall have a diverging face top to bottom to assist in positive closure of the fap. The frame shall be provided with a rear attaching fange, holes to mount, and a concrete structure with a grout pad. Two lifting lugs shall be provided on the frame for handling and installation hanging.

COVER (FLAP)

The cover shall be fabricated from fabric reinforced neoprene rubber and type 304 stainless steel reinforcing angles attached to the rubber sheet with stainless steel through bolts and backing bars. The bolts shall be caulked or sealed to prevent leakage through the boltholes. The size and quantity of reinforcing beams shall be designed to withstand the maximum hydrostatic force applied to the gate. The hinge end of the cover shall be securely bolted to the frame with heaving clamping bars and bolts.

The rubber cover sheet shall be one piece without seams.

The rubber thickness shall be sufcient to prevent excessive “ballooning” under hydrostatic pressure. Gate widths greater than available rubber sheet shall be furnished with multiple (side by side) openings.

The fap cover shall have a lifting lug at its lower end to facilitate lifting for cleaning.

HINGE

The hinge shall be fexible type integral with the fexible rubber cover.

SEATING SURFACES

Resilient hollow section or lip type rubber seals shall be attached to the divergent face of the gate frame with bolts and stainless steel retainer bars. The resilient seals shall provide a high degree of water tightness.

LIMITATIONS

We want to be sure that fexible fap gates will meet the requirements of the project. Before specifying gates wider than 60" and head pressures more than twice the gate height, contact our Engineering Department for design and material limits. Provide information about the type of service, type of water, maximum seating heads and mounting information.

GATE SCHEDULE

QUANTITY REQUIRED SIZE OF OPENING (IN.) BACK TYPE SEATING HEAD (FT) REMARKS

OUR MISSION IS TO BE THE LEADING WATER CONTROL GATE MANUFACTURER IN THE WORLD, THROUGH CONTINUOUS DEVELOPMENT OF AN ORGANIZATION WHICH PROMOTES EXTRAORDINARY CUSTOMER SERVICE, SUPERIOR ENGINEERING, QUALITY PRODUCTS AND

ON-TIME DELIVERY.

For more information about us or to view our full line of water products, please visit www.hydrogate.com or call Hydro Gate® customer service at 1.800.423.1323.

Mueller refers to one or more of Mueller Water Products, Inc., a Delaware corporation ("MWP"), and its subsidiaries. MWP and each of subsidiaries are legally separate and independent entities when providing products and services. MWP does not provide products or services to third parties. MWP and each of its subsidiaries are liable only for their own acts and omissions and not those of each other. MWP brands include Mueller®, Echologics®, Hydro Gate®, Hydro-Guard®, Jones®, Mi.Net®, Milliken®, Pratt®, Singer®, and U.S. Pipe Valve & Hydrant. Please see www.muellerwp.com/about to learn more.

Copyright © 2019 Henry Pratt Company, LLC. All Rights Reserved. The trademarks, logos and service marks displayed in this document are the property of Mueller Water Products, Inc., its afliates or other third parties. Products marked with a section symbol (§) are subject to patents or patent applications. For details, visit www.mwppat.com. These products are intended for use in potable water applications. Please contact your Mueller Sales or Customer Service Representative concerning any other application(s).

F 13782 1/19 http://www.hydrogate.com www.mwppat.com www.muellerwp.com/about

BROCHURE RV08.00-1

May 2024

CheckMate UltraFlex®:The World’s Most Reliable In-Line Check Valve

CheckMate UltraFlex®- Often Imitated, Never Equaled A Legacy of Leadership Nearly 70 years ago, Red Valve was founded on a simple promise, In response, Red Valve developed and patented the Tideflex® to design and manufacture the highest quality engineered check Duckbill Check Valve and CheckMate® In-Line Check Valve.

valves, backed by an unsurpassed level of technical innovation Today, more than one million Tideflex® Duckbill Check Valves and customer service. and CheckMate® In-Line Check Valves are in service around the world, reliably solving backflow problems.

In 1984, the United States Environmental Protection Agency (EPA) commissioned Red Valve to develop and test an alternative The CheckMate UltraFlex® Valve is a professional’s choice for to flap gate valves with the understanding that “Increasing the municipal and industrial applications - including stormwater, reliability and performance of tide gates has a beneficial impact wastewater, highway run-off, combined sewer overflow on the general pollution abatement program for the nation’s (CSO), sanitary sewer overflow (SSO) and flood control.

waterways.” No other valve outperforms the CheckMate UltraFlex® for preventing unwanted backflow that can cause surcharging and flooding.

Multiple layers of elastomer and fabric Every valve is reinforced with a variety of ply options depending on size and process conditions.

reinforcing plies are vulcanized into a Plies include a wide range of natural and synthetic elastomers and fabrics as well as proprietary single unibody construction; no rivets or elastomers such as Neoprene (CR), Ethylene Propylene Diene Terpolymer (EPDM), Styrene connections to weaken and break. Butadiene Rubber (SBR), Fluoro Rubber (FKM), Nylon, Polyester and others.

Cuff

Wire-reinforced for strength and durability.

Clamp (installed in upstream or downstream cuff)

Saddle area is reinforced with a Extraction hole facilitates removal variety of proprietary natural and of the valve from the pipeline. Billsynthetic elastomers and fabrics.

(sealing area)

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The key to the CheckMate UltraFlex® Valve’s durability and longevity is Red Valve’s unmatched elastomer application knowledge and engineering expertise.

Unlike other in-line valves, CheckMate UltraFlex® Valves are hand-fabricated, using various natural and synthetic elastomers and fabric ply reinforcement, to create a unibody construction.

There are no molded parts, mechanical fasteners or rivets that will loosen or catch debris, corrode and fail, making the valve maintenance-free. CheckMate UltraFlex® Valves boast extremely low head loss, allowing nearly 100% flow capacity. Their inherent design and construction makes them the most user-friendly in-line check valves on the market today.

Features and Benefits:

• Extremely low head loss

• No moving mechanical parts to corrode, catch debris or fail

• Heavy-duty elastomer unibody construction

• Quick and easy installation

• Seals much better around debris compared to flap gates

• Operates on differential pressure, totally passive

• Virtually no maintenance

• Self-draining, with as little as 1" of cracking pressure

• Silent, non-slamming

• Available in sizes 3-84" (75-2100mm)

• Extensive independent hydraulic testing

FULLY OPEN

FULLY CLOSED

FLOWING

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Clamp

Saddle area features strategically placed reinforcing grooves and segmented pads customized for each application.

The Arc Notch in the UltraFlex® Valve’s bill functions as a hinge, greatly reducing the force required to unseat the valve. This patented design achieves very low snap-open pressure.

CheckMate UltraFlex® - Increasing Flow Efficiency

The Next Generation in Valve Technology The patented CheckMate UltraFlex® In-Line Check Valve features strategically placed reinforcing grooves, segmented pads and an Arc Notch Bill. These advanced design features combine to significantly improve flow efficiency and reduce head loss, while providing reliable backflow protection.

When upstream head pressure gets to a specific level, CheckMate UltraFlex® In-Line Check Valves are designed to snap or pop open, allowing the rapid discharge of flow.

The UltraFlex’s® patented saddle grooves, segmented pads, Arc Notch and optimized construction allow the valve to open sooner. As a result, the pipeline and entire collection system drains faster.

Because the CheckMateUltraFlex® Valve opens with less head pressure, pipeline capacity is significantly increased, while the chance for standing water to collect upstream of the valve is greatly eliminated.

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UltraFlex® Boasts Lower Snap Pressure®

The CheckMate UltraFlex® Valve boasts a lower Snap Pressure® to open or unseat the valve, without compromising the valve’s ability to seal. This greatly improves capacity in pipelines and the rapid drainage of upstream flow through the valve. With its patented design features, the CheckMate UltraFlex® In-Line Check Valve boasts a significantly improved flow efficiency due to reduced head pressure levels required to snap open the valve.

The CheckMate UltraFlex® Valve will crack open with as little as 1” of head pressure.

When the CheckMate UltraFlex® snaps open, the valve immediately achieves rapid discharge of flow.

When upstream head reaches a certain level above pipe invert (for example, 8" head in a 24" valve), the UltraFlex® bill snaps open into a concave shape, allowing substantially more flow with the same amount of head. The valve will progressively open with increased head and flow. The CheckMate UltraFlex® can have up to 40% lower Snap Pressure® than a valve without the saddle grooves and Arc Notch.

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CheckMate UltraFlex® - Ultimate in Backflow Prevention

CheckMate UltraFlex®

Valves in Manhole Application

CheckMate UltraFlex® Valve in End of Pipe Application

Accept No Substitutes!

The innovative CheckMate UltraFlex® In-Line Check Valve has quickly become the specified choice for in-line residential, municipal and commercial areas where complete, dependable backflow prevention is critical. It has also become the valve of choice for municipal and industrial applications such as stormwater, wastewater, highway run-off, CSO, SSO and flood control, because it prevents unwanted backflow that can cause surges and flooding. In addition, the CheckMate® minimizes damage to wetlands, beaches and residential areas.

CheckMate UltraFlex® Valves are ideally suited for interceptor, manhole and outfall pipelines, as they allow flow to discharge with very little head loss and prevent backflow. The CheckMate UltraFlex® Valve’s innovative in-line design allows it to easily be installed without modifications to existing structures, making it the perfect choice for both municipalities and commercial property owners. The valve also eliminates hydraulic surges to wastewater treatment plants, potentially saving municipalities millions of dollars in maintenance and treatment costs.

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The CheckMate® seals tightly to provide odor control.

CheckMate® Solves Odor Problems When foul odors were plaguing a soybean-producing town in Illinois, officials turned to Red Valve for the most reliable, cost-effective solution. A chemical deodorizing system and a pump station were also evaluated, but far exceeded budget constraints. The CheckMate® In-Line Check Valve proved to be the perfect solution. The CheckMate® In-Line Valve was installed in 2012 and has worked flawlessly ever since, completely blocking the backdraft of the odor.

The unibody CheckMate® also prevents backflow.

Best of all, there has been no maintenance expense. According to a public works official, “This is one of the most cost-effective solutions to a nagging quality-of-life problem the city has ever implemented. We are now looking at other parts of the combined sewer system that has a few small odor problems due to escaping sewer gas.”

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Independently Tested, Field Validated

Independent Hydraulic Testing CheckMate UltraFlex® In-Line Check Valves are independently To supplement independent hydraulic testing, Red Valve tested to determine their hydraulic characteristics in both free continually conducts research and development and additional and submerged discharge applications. Published hydraulic in-house testing to improve existing products and develop new data is validated through independent testing. products.

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Simple Design for Simple Installation

CheckMate UltraFlex® Valves are easily installed regardless of difficult pipe end geometry or pipes in poor end condition.

There is no need to rebuild headwalls.

Slips Into Existing Pipeline The CheckMate UltraFlex® In-Line Check Valve is extremely easy to install, regardless of the existing environment or piping.

Its inherent design makes it the most user-friendly in-line check valve on the market today. From the upstream or downstream end of the pipe, simply insert the valve into position and clamp it into place.

Typically, no modification to the pipe or structure is required to install a CheckMate UltraFlex®. Because the valve is recessed inside of the pipe, additional permitting is not required. The results are construction cost savings, reduced installation time and reduced operational costs.

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Arch Pipe CheckMate

A Wide Range of Shapes and Styles

Elliptical and Arch Pipes Elliptical and arch pipes for drainage and flood prevention projects have become popular, particularly in high water table areas with shallow surface gradients. CheckMate UltraFlex®

In-Line Check Valves are the perfect solution as they can be customized to meet your specifications. Elliptical Pipe CheckMate

Rubber Flanged Rubber Flanged CheckMate UltraFlex® Check Valves can be manufactured with an integral rubber upstream or downstream flange. The flanged CheckMate UltraFlex® is inserted into the host pipe, then bolted to a mating flange or anchored to a concrete headwall. The flange can be circular with standard drilling; or circular, square or rectangular with custom flange drilling. The valve is supplied with retaining rings for mounting.

Thimble Inserts A CheckMate UltraFlex® Thimble Insert is a CheckMate® Valve that is factory installed, clamped and pinned into a flanged or plain-end pipe. The Thimble Insert assembly is installed by inserting the CheckMate UltraFlex® into the I.D. of the host pipe. The Thimble Insert is available in flange or no-flange versions. A flange on a Thimble Insert can be upstream with circular, square, rectangular or custom flanges; or it can be located on the downstream side.

Plain end, no-flange thimble inserts are inserted into the host pipe and non-shrink grout is placed between the Thimble Insert O.D. and host pipe I.D. to form the seal. This can be done in circular pipe or in a square culvert.

Tandem Thimble Inserts can also be made for rectangular culverts. A variety of custom Thimble Insert configurations are also available.

Thimble Extensions A CheckMate UltraFlex® Thimble Extension is mounted to a mating flange or concrete headwall. The CheckMate® portion extends beyond the concrete headwall. Thimble Extensions have an upstream flange. They can also be designed with a downward sloping pipe stub to gain additional head.

UltraFlex® UltraFlex®

Upstream Flanged CheckMate UltraFlex®

Thimble Extension CheckMate UltraFlex®

Tandem Thimble Insert CheckMate UltraFlex®

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Configurations and Custom Designs

CheckMate® can be made for any pipe I.D. Flange shape and bolt pattern can be customized.

Built to fit in sizes from 3-72” (75-1800mm). Flangeless thimble inserts are available.

Pr es su re

St an da rdPr es su re St an da rd

Cuff Depth

Flow

Length Clamp

Cuff Depth

Downstream Clamp Upstream Clamp

Clamp

Downstream Flanged Upstream Flanged

Flow

Length

Flow Flow

Downstream Flanged Thimble Insert or Extension Upstream Flanged Thimble Insert or Extension

Flow Flow

NOMINAL

PIPE SIZE I.D. WEIGHT***

Inches Kg

4 100 7.9 201 1 1.5 38 85 26.0 3 1.5 5 125 9.5 241 1 1.5 38 83 25.3 4 2 6 150 11.0 279 1 2.0 51 83 25.3 9 4 7 175 12.8 325 1 2.0 51 79 24.1 11 5 8 200 15.2 386 1 2.0 51 79 24.1 13 6 9 225 15.4 391 1 2.0 51 75 22.9 17 8 10 250 16.1 409 1 2.0 51 71 21.6 20 10 12 300 19.8 503 1 2.0 51 68 20.1 37 17 14 350 25.8 655 1 4.0 102 64 20.0 110 50 15 381 25.8 655 1 4.0 102 62 18.9 120 55 16 400 28.6 726 1 4.0 102 60 18.3 133 52 18 450 31.0 787 1 4.0 102 56 17.1 143 65 20 500 42.1 1069 2 8.0 203 53 16.2 223 102 24 600 47.5 1207 2 8.0 203 45 13.7 304 137 26 650 50.0 1270 2 8.0 203 42 12.8 370 168 28 700 52.0 1321 2 8.0 203 40 12.2 434 197 30 750 54.9 1395 2 8.0 203 38 11.6 500 227 36 900 62.3 1582 2 8.0 203 30 9.1 828 376 42 1050 70.6 1793 2 8.0 203 28 8.5 1423 646 48 1200 79.0 2007 2 8.0 203 26 7.9 1801 817 54 1350 86.4 2195 2 8.0 203 20 6.1 2700 1225 60 1500 96.8 2459 2 9.0 229 18 5.5 3315 1504 72 1800 119.0 3023 3 12.0 305 15 4.6 6100 2767

*Shorter lengths available. **Back pressure measured from pipe invert.

Higher back pressure ratings available. Consult factory.

***Weights are approximate and do not include crating.

Millimeters

OVERALL

LENGTH*

Inches Millimeters

NUMBER

OF

CLAMPS

CUFF

DEPTH

Inches Millimeters

BACK PRESSURE

RATING**

Feet Meters lbs

75 5.1 130 1 1.5 38 10 0.7 0.3 100 7.9 201 1 1.5 38 10

3.0

1.5 0.7

DIMENSIONS

3.0 Lo

w

Pr es su re

RedValve.com I 11

JosJac3303 Do As Marked

JosJac3303 Do As Marked

Red Valve offers a worldwide, world-class custom service network. With corporate offices in Pittsburgh, PA, manufacturing facilities in Gastonia, NC, and a network of sales representatives around the globe, Red Valve has the sales engineering team to help you select the best choice of valves and related products for your applications.

The World Leader in Pinch and Check Valve Technology™

750 Holiday Drive, Suite 400, Pittsburgh, PA 15220 | 412.279.0044 | support@redvalve.com | RedValve.com

The information presented in this catalog is provided in good faith. Red Valve Company, Inc. and Tideflex® reserves the right to modify or improve its design specifications without notice and does not imply any guarantee or warranty for any of its products from reliance upon the information contained herein. All orders are subject to Red Valve Company, Inc.

standard terms and warranty and are subject to final acceptance by Red Valve Company, Inc.

Tideflex, Red Valve, the Red Valve “rv” logo, CheckMate, UltraFlex and Snap Pressure are registered trademarks of Red Valve

© 2023 Red Valve All rights reserved.

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