B09_Amd8_-_Spec_33_14_19_-_VALVES___HYDRANTS_FOR_WATER_UTILITY_SERVICE_0008.pdf

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VALVES & HYDRANTS FOR WATER UTILITY SERVICE

SECTION 33 14 19 – VALVES AND HYDRANTS FOR WATER UTILITY SERVICE

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes valves and accessory components for the Pressure Reducing Valve gallery as a component of the water distribution utility service, not limited to, the following:

1. Pressure Reducing Valves.

2. Transition Devices.

3. Gate Valves

4. Strainers

5. Combination Air & Vacuum Valves

6. Ball Valves

7. Duckbill Check Valve

8. Reduced Pressure Principle (RPZ) Backflow Preventer

9. Pipe Adapters

10. Pipe Couplings

11. Flange Connections

12. Pipe Supports

1.2 SUBMITTALS

A. Submit under provisions of Division One Specifications

B. Product Data

1. Manufacturer's installation instructions.

2. Shop Drawings: Detail gallery valve assemblies and indicate dimensions, method of field assembly, and components.

C. Manufacturer’s Certificate

D. Test Reports: Submit reports of field pressure tests and disinfection under provision of Division

One specifications.

1.3 RELATED SECTIONS

A. 33 14 23 Enclosures for Water Utility Piping and Valves

B. 32 13 13 Concrete Paving

C. 33 14 16 Site Water Utility Distribution Piping

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1.4 PROJECT RECORD DOCUMENTS

A. Submit under provisions of Division One Specifications

B. Accurately record actual locations of piping mains, valves, connections, and top of pipe elevations

C. Identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities.

1.5 QUALITY ASSURANCE

A. Perform Work in accordance with State of California Waterworks Standards

B. Manufacturer’s name and pressure rating marked on piping, valves and hydrants.

1.6 REGULATORY REQUIREMENTS

A. Conform to all applicable Federal codes and ordinances, laws and regulations of the National

Park Service

B. In case of apparent conflict, the Owner’s Representative shall govern over these specifications

C. In absence of State and local regulations, Uniform Plumbing Code applies

D. NFPA Compliance: Install fire water systems in accordance with NFPA 24 “Standard for the

Installation of Private Fire Service Mains and Their Appurtenances.”

E. UL Compliance: Provide fire hydrants that comply with UL 246 “Hydrants for Fire-Protection

Service,” and are listed by UL.

1.7 DELIVERY, STORAGE AND HANDLING

A. Preparation for Transport: Prepare valves for shipping as follows.

1. Ensure that valves are dry and internally protected against rust and corrosion.

2. Protect valves against damage to threaded ends, flange faces, and weld ends.

3. Set valves in best position for handling.

4. Set valves closed to prevent rattling.

B. Deliver, store, protect and handle products to site under provision of Division One Specifications

C. Deliver and store valves and accessories in shipping containers with labeling in place in accordance with AWWA C500

D. Provide temporary end caps and closures on piping and fittings. Maintain in place until installation.

E. Seal valve ends to prevent entry of foreign materials into valve body.

F. During loading, transporting and unloading, exercise care to prevent damage to material

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1. Use nylon slings only

2. Do not drop valves or fittings

3. Do not roll or skid

4. Repair any damage done to coating or lining

5. Handle per manufacturer’s recommendations

6. Store rubber gaskets in cool dark location

7. Store all material on wood pallets or timbers

PART 2 - PRODUCTS

2.1 PRESSURE REDUCING CONTROL VALVES

A. Function.

1. The Pressure Reducing Control Valve shall automatically throttle to reduce a higher incoming pressure and maintain an accurate and constant lower downstream pressure regardless of changing flow rate and/or inlet pressure. If downstream pressure increases above the pilot spring setting, the valve shall close.

B. Materials.

1. Material Specification for the Pressure Reducing Control Valves Main Valve as follows:

Component Material

Body & Cover Ductile Iron-ASTM A536

Cast Steel or Bronze (optional)

Main Valve Trim Bronze, Stainless Steel

Other Materials Available (optional)

Seat Bronze, Stainless Steel

Other Materials Available (optional)

Stem, Nut and Spring Stainless Steel, Dura-Kleen Stems™

Seal Disc Buna-N® Rubber

Diaphragm Nylon Reinforced Buna-N® Rubber

Other Materials Available (optional)

Internal Trim Parts Stainless Steel: Bronze; Brass

End Detail Flanged (1-1/2” – 36”)

Threaded (1” – 3”)

Grooved (1-1/2” – 8”)

Pressure Rating Class 150 lb. (250psi Max.)

Class 300 lb. (400psi Max.)

Temperature Range Water to 180ᵒF

Any other wetted metallic parts Stainless Steel; Bronze; Brass

Coating Fusion Bonded Epoxy Coating (Interior and Exterior);

ANSI / NSF 61 Approved / AWWA coating specifications C116-03.

Accessories Opening & Closing Speed Controls

Optional Accessories Position Indicator, Limit Switch, Check Feature, Isolation Valves, Gauges, Anti Cavitation Trim, Etc.

2. All water system components shall be compliant with NSF 61.

C. Manufacture

1. Main Valve

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a. The main valve shall be hydraulically operated, single diaphragm actuated, globe or angle pattern. The valve shall consist of three major components; the body with seat installed, the cover with bearing installed and the diaphragm assembly. The diaphragm assembly shall be the only moving part and shall form a sealed chamber in the upper portion of the valve, separating the operating pressure from line pressure. Packing glands, stuffing boxes and/or rolling diaphragm technology will not be permitted and there shall be no pistons operating the main valve or pilot controls. No fabrication or welding shall be used in the manufacturing process. Y-pattern valves shall not be permitted. Main valve shall comply with NSF/ANSI

Standard 61 and certified lead free to NSF/ANSI 372 as a safe drinking water system component.

2. Main Valve End Connections

a. End Connections for control valve shall be flanged per ASME/ANSI B16.42, Class

150 or Class 300 (1-1/2” thru 36”) or Threaded End Connections (1” thru 3”) or

Grooved End Connections (1-1/2” thru 8”)

3. Main Valve Body

a. No separate chamber(s) below the diaphragm shall be allowed between the main valve cover and body. No fabrication or welding shall be used in the manufacturing process.

b. The valve shall contain a resilient, synthetic rubber disc with a rectangular cross-section contained on three and one half sides by a disc retainer and forming a tight seal against a single removable seat insert. No O-ring type discs (circular, square, or quad type) shall be permitted as the seating surface. The disc guide shall be of the contoured type to permit smooth transition of flow and shall hold the discs firmly in place. The disc retainer shall be of a sturdy one-piece design capable of withstanding opening and closing shocks. It must have straight edge sides and a radius at the top edge to prevent excessive diaphragm wear as the diaphragm flexes across this surface. No hour-glass shaped disc retainers shall be permitted and no V-type or slotted-type disc guides shall be used.

c. The diaphragm assembly containing a non-magnetic stainless steel stem; of sufficient diameter to withstand high hydraulic pressures and shall be fully guided at both ends by a bearing in the main valve cover and an integral bearing in the valve seat. The valve seat shall be a solid, one-piece design and shall have a minimum five-degree taper on the seating surface for a positive, drip-tight shut off. No center guides shall be permitted. The stem shall be drilled and tapped in the cover end to receive and affix such accessories as may be deemed necessary. The diaphragm assembly shall be the only moving part and shall form a sealed chamber in the upper portion of the valve, separating the operating pressure from the line pressure. No bolts or cap screws shall be permitted for use in the construction of the diaphragm assembly.

d. The flexible, non-wicking, FDA approved diaphragm shall consist of nylon fabric bonded with synthetic rubber compatible with the operating fluid. The diaphragm’s center hole for the main valve stem must be sealed by the vulcanized process or a rubber grommet sealing the center stem hole from the operating pressure. The diaphragm must withstand a Mullins Burst Test of a minimum of 600 X per layer of nylon fabric and shall be cycled tested 100,000 times to insure longevity. The diaphragm shall not be used as the seating surface. The diaphragm shall be fully supported in the valve body and cover by machined surfaces which support no less than one-half of the total surface area of the diaphragm in either the fully opened or fully closed position. Bellofram type rolling diaphragms shall not be permitted.

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e. The main valve seat and stem bearing in the valve cover shall be removable. The cover bearing and seat in the 6” and smaller size valve shall be threaded into the cover and body. The valve seat in the 8” and larger size valves shall be retained by flat head machine screws for ease of maintenance. The lower bearing of the valve stem shall be contained concentrically within the seat and shall be exposed to the flow on all sides to avoid deposits. To ensure proper alignment of the valve stem, the valve body and cover shall be machined with a locating lip. No “pinned” covers to the valve body shall be permitted. Cover bearing, disc retainer and seat shall be made of the same material. All necessary repairs and/or modifications other than replacement of the main valve body shall be possible without removing the valve from the pipeline. The valve shall be designed such that both the cover assembly and internal diaphragm assembly can be disassembled and lifted vertically straight up from the top of a narrow opening/vault. Y-pattern valves shall not be permitted. The seat shall be of the solid one piece design. Two piece seats or seat inserts shall not be permitted. Packing glands and/or stuffing boxes shall not be permitted.

4. Pilot Control System:

a. The pressure reducing pilot control shall be a direct-acting, adjustable, spring-loaded, normally open, diaphragm valve designed to permit flow when controlled pressure is less than the spring setting. The pilot control is held open by the force of the compression on the spring above the diaphragm and it closes when the delivery pressure acting on the underside of the diaphragm exceeds the spring setting. The pilot control shall have a second downstream sensing port which can be utilized to install a pressure gauge. Pilot shall comply with NSF/ANSI 61 and certified lead free to NSF/ANSI 372 as a safe drinking water system component.

b. The pilot control system shall include a strainer, a fixed orifice closing speed and all required control accessories, equipment, control tubing and fittings. No variable orifices shall be permitted. The pilot system shall include an opening speed control on all valves sizes 3” and smaller as standard equipment. The pilot system shall include isolation ball valves on sizes 4” and larger as standard equipment. A full range of spring settings shall be available in ranges of 0 to 400 psi. Pilot to be manufactured by control valve manufacturer.

5. Material Specification for Pilot Control:

Body & Cover Bronze, Low Lead CuZn21Si3P or UNS C87850

Stainless Steel (optional)

Pilot Trim Brass & Stainless Steel 303

Rubber Buna-N®

Connections FNPT

Pressure Rating 400 psi Max.

Temperature Range Water to 180ᵒF Max.

Control Tubing Copper

Stainless Steel (optional)

Flexible Braided Stainless Steel (optional)

Polyethylene (optional)

Control Fittings Brass

Stainless Steel (optional)

6. Factory Assembly:

a. Each control valve shall be factory assembled.

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b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001: 2008.

c. For all control valves, the factory assembly shall include the complete main valve, pilot valve(s), and all associated accessories and control equipment.

d. During factory assembly the control valve manufacture shall make all necessary adjustments and correct any defects.

7. Nameplates:

a. Each Control Valve and associated pilot(s) shall be provided with an identifying nameplate

b. Nameplates, depending on type and size of control valve, shall be mounted in the most practical position possible, typically on the inlet side of the valve body.

c. Nameplates shall be brass and a minimum of 3/32” thick, ¾” high and 2-3/4” long.

d. Pertinent control valve data shall be etched or stamped into the nameplate. Data shall include control valve Catalog number, function, size, material, pressure rating, end-connection details, type of pilot controls used and control adjustment range.

8. Factory testing:

a. Each control valve shall be factory tested.

b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001: 2008

c. Tests shall conform to approved test procedures.

d. The standard factory tests shall include a valve body and cover leakage test, seat leakage test and a stroke test. Control valves and pilot valves, in the partially open position, with both ends closed off with blind flanges (valves) and pipe plugs (pilots), shall be subject to an air test. The applied air pressure shall be 90 psi minimum. All air pressure tests shall be applied for a minimum of 15 minutes. No visible leakage is permitted through the valve seat, the pressure boundary walls of the valve body, valve cover, pilot body, pilot cover or the body-cover joint.

e. Control valve manufacturer shall, upon request, offer additional testing, such as high pressure hydrostatic testing, positive material inspection testing, ferrite testing, liquid penetration inspection testing, magnetic particle examination testing and radiographic examination testing.

D. Product data

1. The following information shall be provided:

a. Control Valve manufacturer’s technical product data.

b. Control Valve manufacturer’s Installation, Operation and Maintenance manual

(IOM).

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2. Provide specific information on all optional features specified above and confirm that these items are provided.

3. The valve manufacturer shall be able to supply a complete line of equipment from 1” through 36” sizes and a complete selection of complementary accessories and equipment.

4. The control valve manufacture shall provide a computerized cavitation analysis report which shows flow rate, differential pressure, and percentage of valve opening. Cv factor, system velocity, and if there will be cavitation damage.

5. The manufacturer must also provide valve noise levels according to International Standards over the flow range of the valve. Noise calculation program will be specific to the control valve manufacturer, and based upon tests conducted by a third party, independent laboratory and will be able to provide dBA values for octave band frequencies between

31.5 and 8000 Hz. (Valves with KO trim calculations are per another industry accepted standard without the octave band frequency noise levels). Generic, third party noise calculation for non-specific control valves will not be accepted.

2.2 STRAINER

A. Application

1. H-style Strainer that shall be capable of preventing unwanted debris and solid particles from passing through the internal mesh and continuing downstream.

B. Standards Compliance

C. Materials

Component Material

Body & Cover Ductile Iron-ASTM A536

Support Frame Ductile Iron-ASTM A536

Strainer 316 Stainless Steel

Strainer Mesh 10 Mesh / 2000 Micron / Opening 0.078 inch (Standard)

18 mesh / 1000 Micron / Opening 0.039 inch (Optional)

14 mesh / 1410 Micron / Opening 0.059 inch (Optional)

Cover Fasteners Stainless Steel

Cover Vent Stainless Steel

Drain Blow-Off Plug Stainless Steel

Seal Buna-N Rubber

End Detail Flanged (1-1/2” – 24”)

Pressure Rating Class 150 lb. (250psi Max)

Temperature Range Water to 175˚F

Any other wetted metallic parts Stainless Steel; Bronze; Brass

Coating Fusion Bonded Epoxy Coating (Interior and Exterior);

ANSI / NSF 61 Approved / AWWA coating specifications C116-03

Optional Accessories Differential Pressure Switch, Differential Pressure

Gauge, Battery Powered Programmable Flushing Valve

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D. Manufacture

1. Strainer Body and Cover:

a. The body shall have a compact H-Style pattern with internal locating ribs for locating strainer mesh screen and support frame perpendicular to the flow direction.

The strainer shall have a flow area equal to or greater than 150 percent of the inlet flow area of the strainer. A rectangular cover shall be provide with a stainless-steel air elimination valve. The strainer cover seal shall be Buna-N O-ring. Strainer body shall have two blow-off drain ports, with pipe plugs located perpendicular to the flow, one on each side of the strainer body. The strainer shall have threaded side boss ports for optional accessories.

2. End Connections:

a. End Connections for H-style strainer shall be flanged per ASME/ANSI B16.42, Class 150 (1-1/2” – 48”) or Class 300 (1-1/2” thru 24”).

3. Strainer Support Frame

a. A removable, mesh-support frame shall be located behind the strainer mesh screen to support it during normal flow use and constructed of same material as strainer body. The mesh-support frame shall have sufficiently large openings to allow full flow without deformation of the strainer mesh screen. Strainer mesh screen and support frame shall be installed from the top into the internal locating ribs of the strainer body, perpendicular to the flow, to minimize pressure drop.

4. Strainer Mesh Screen

a. The strainer mesh screen shall have contoured arch design to withstand flowing pressure distortions. The standard 10 mesh (2000 micron) screen element shall have

0.078 inch openings and the manufacturer shall offer optional mesh elements. All strainer mesh screen elements shall be constructed of 316 SS and be of rectangular-trapezoidal shape with a one-piece 316 SS reinforcement edge covering and securely fastened to the entire screen. All necessary inspection and/or cleaning of the strainer screen shall be possible by removing the top cover only; without removing the H-style Strainer from the pipeline. Screen shall also be capable of being cleaned with the cover attached by reverse fluid flow thru the strainer to atmosphere through one of the two provided blow-off drain plug ports.

5. Accessories

a. The H-style Strainer can be equipped with optional battery-powered programmable flushing valve allowing for automatic cleaning operation.

b. Optional Differential Pressure Switch.

c. Optional Differential Pressure Gauge Assembly.

6. Nameplates

a. Each H-style Strainer shall be provided with an identifying nameplate

b. Nameplates shall be mounted in the most practical position possible

c. Nameplates shall be brass and a minimum of 3/32” thick, ¾” high and 2-3/4” long.

d. Pertinent strainer data shall be etched or stamped into the nameplate. Data shall include Catalog number, size, material, pressure rating and end-connection details.

7. Factory Assembly

a. Each H-style Strainer shall be provided with an identifying nameplate.

b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001:2008.

8. Factory Testing

a. Each H-style Strainer shall be factory tested.

b. Tests shall conform to approved test procedures.

c. H-style Strainers with both ends closed off with blind flanges shall be subject to a hydrostatic test. The pressure shall be applied for a minimum of 5 minutes. No

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visible leakage is permitted through the pressure boundary walls of the strainer or the body-cover joint.

9. Product Data

a. The following information shall be provided

1) H-style Strainer manufacturer’s technical product data.

2) H-style Strainer manufacturer’s Installation, Operation and Maintenance manual (IOM).

b. The H-style Strainer manufacturer shall be able to supply a complete line of equipment from 1-1/2” through 48” sizes.

2.3 NON-RISING STEM (NRS) GATE VALVE

A. Application

1. Valve intended for use in potable water distribution to control flow of water.

B. Standards Compliance

1. ANSI/AWWA C515

2. UL 262 listed

3. FM 1120/1130 approved

4. ANSI/NSF 61 & 372 certified

C. Materials

1. Stem and stem nut: Bronze

a. Wetted bronze parts in low zinc bronze

b. Aluminum bronze components: Heat treated per AWWA C504

2. Body, gate: Ductile Iron

3. Resilient wedge: Fully encapsulated rubber wedge. Ethylene Propylene Diene Monomer

(EPDM)

D. Description & Design Requirements

1. Minimum 150 PSIG working pressure

2. Exposed Application: NRS, O-ring, stem seal, handwheel

3. Counterclockwise open rotation (open left)

4. Fusion bonded epoxy coating interior and exterior except stainless steel and bearing surfaces.

a. Comply with AWWA C550

b. Wetted bronze parts in low zinc bronze.

c. Aluminum bronze components: Heat treated per AWWA C504

2.4 TRANSITION DEVICE

A. Application

1. Installed on the downstream side of the bypass valve(s) in a Pressure Reducing Station.

The device ensures the velocity rate at which the transition happens where the main line valve begins to open. The velocity shall be governed by the pressure setpoint gap between the pressure reducing valves in the “main” and “bypass” lines.

B. Standards Compliance

1. ASTM A536

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2. ANSI 125/150/250/300

C. Materials

1. The transition device shall have an epoxy-coated ASTM A536 ductile iron compact wafer-style body with a stainless steel 302 trim.

2. The water-style body shall be designed to fit between ASNI 125/150/250/300 flanges.

D. Description & Design Requirements

1. To aid correct installation, the leading edge of the transition device shall have a chamfer and machined arrow to indicate the inlet side of the transition device.

2. The device shall ensure the velocity rate at which the transition happens where the “main” line valve(s) begins to open.

3. The velocity shall be governed by the pressure setpoint gap between the pressure reducing valves in the “main” and “bypass” lines.

2.5 PRESSURE RELIEF VALVE

A. Application

1. The Pressure Relief/Sustaining Control Valve shall maintain a constant upstream pressure by bypassing or relieving excess pressure and shall maintain close pressure limits without causing surges. Valve will remain closed until the upstream pressure exceeds a pre-determined set point. Valve will be fast opening and modulate to limit the upstream pressure to a pre-determined set point. If upstream pressure decreases below the pilot spring setting, the valve shall close. Valve will be slow closing to prevent surges.

B. Standards Compliance

1. NSF/ANSI Standard 61, main valve, pilot control body

2. NSF/ANSI 372, main valve, pilot control body

3. ASME/ANSI B16.42

C. Materials

1. Material specification for the Pressure Relief/Sustaining Valve Main Valve as follows:

Body & Cover Ductile Iron-ASTM A536

Cast Steel or Bronze (optional)

Main Valve Trim Bronze, Stainless Steel

Other Materials Available (optional)

Disc Retainer Cast Iron

Diaphragm Washer Cast Iron

Seat Bronze, Stainless Steel

Other Materials Available (optional)

Stem, Nut & Spring Stainless Steel

Seal Disc Buna-N Rubber

Diaphragm Nylon Reinforced Buna-N Rubber

Internal Trim Parts Stainless Steel: Bronze; Brass

Flanged (1-1/2” – 36”)

Threaded (1” – 3”)

Grooved (1-1/2” – 8”)

Pressure Rating Class 150lb (250psi Max)

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Class 300lb (400psi Max)

Temperature Range Water to 180˚F

Any other wetted metallic parts Stainless Steel; Bronze; Brass

Coating Fusion Bonded Epoxy Coating (Interior &

Exterior)

D. Description & Design Requirements

1. Main Valve

a. The main valve shall be hydraulically operated, single diaphragm actuated, globe or angle pattern. The valve shall consist of three major components; the body with seat installed, the cover with bearing installed and the diaphragm assembly. The diaphragm assembly shall be the only moving part and shall forma sealed chamber in the upper portion of the valve, separating the operating pressure from line pressure. Packing glands, stuffing boxes and/or rolling diaphragm technology will not be permitted and there shall be no pistons operating the main valve or pilot controls. No fabrication or welding shall be used in the manufacturing process. Y-pattern valves shall not be permitted. Main valve shall comply with NSF/ANSI

Standard 61 and certified lead free to NSF/ANSI 372 as a safe drinking water system component.

2. Main Valve End Connections

a. End Connections for control valve shall be flanged per ASME/ANSI B16.42, Class

150 or Class 300 (1-1/2” thru 36”) or Threaded End Connections (1” thru 3”) or

Grooved End Connections (1-1/2” thru 8”)

3. Main Valve Body

a. No separate chamber(s) below the diaphragm shall be allowed between the main valve cover and body. No fabrication or welding shall be used in the manufacturing process.

b. The valve shall contain a resilient, synthetic rubber disc with a rectangular cross-section contained on three and one-half sides by a disc retainer and forming a tight seal against a single removable seat insert. No O-ring type discs (circular, square, or quad type) shall be permitted as the seating surface. The disc guide shall be of the contoured type to permit smooth transition of flow and shall hold the discs firmly in place. The disc retainer shall be of a sturdy one-piece design capable of withstanding opening and closing shocks. It must have straight edge sides and a radius at the top edge to prevent excessive diaphragm wear as the diaphragm flexes across this surface. No hours-glass shaped disc retainers shall be permitted, and no V-type or slotted-type disc guides shall be used.

c. The diaphragm assembly containing a non-magnetic stainless-steel stem; of sufficient diameter to withstand high hydraulic pressures and shall be fully guided at both ends by a bearing in the main valve cover and an integral bearing in the valve seat. The valve seat shall be a solid, one-piece design and shall have a minimum five-degree taper on the seating surface for a positive, drip-tight shut off. No center guides shall be permitted. The stem shall be drilled and tapped in the cover end to receive and affix such accessories as may be deemed necessary. The diaphragm assembly shall be the only moving part and shall form a sealed chamber in the upper portion of the valve, separating the operating pressure from the line pressure. No bolts or cap screws shall be permitted for use in the construction of the diaphragm assembly.

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d. The flexible, non-wicking, FDA approved diaphragm shall consist of nylon fabric bonded with synthetic rubber compatible with the operating fluid. The diaphragm’s center hole for the main valve stem must be sealed by the vulcanized process or a rubber grommet sealing the center stem hole from the operating pressure. The diaphragm must withstand a Mullins Burst Test of a minimum of 600 X per layer of nylon fabric and shall be cycled tested 100,000 times to insure longevity. The diaphragm shall not be used as the seating surface. The diaphragm shall be fully supported in the valve body and cover by machined surfaces which support no less than one-half of the total surface area of the diaphragm in either the fully opened or fully closed position. Bellofram type rolling diaphragms shall not be permitted.

e. The main valve seat and stem bearing in the valve cover shall be removable.

The cover bearing and seat in the 6” and smaller size valve shall be threaded into the cover and body. The valve seat in the 8” and larger size valves shall be retained by flat head machine screws for ease of maintenance. The lower bearing of the valve stem shall be contained concentrically within the seat and shall be exposed to the flow on all sides to avoid deposits. To insure proper alignment of the valve stem, the valve body and cover shall be machined with a locating lip. No

“pinned” covers to the valve body shall be permitted. Cover bearing, disc retainer and seat shall be made of the same material. All necessary repairs and/or modifications other than replacement of the main valve body shall be possible without removing the valve from the pipeline. The valve shall be designed such that both the cover assembly and internal diaphragm assembly can be disassembled and lifted vertically straight up from the top of a narrow opening/vault. Y-pattern valves shall not be permitted. The seat shall be of the solid one-piece design. Two piece seats or seat inserts shall not be permitted.

Packing glands and/or stuffing boxes shall not be permitted.

4. Pilot Control System

a. The pressure relief/sustaining pilot shall be a direct-acting, adjustable, spring-loaded, diaphragm valve designed to permit flow when controlling pressure exceeds the adjustable spring setting. The pressure relief pilot control is normally held closed by the force of the compression in the spring above the diaphragm and it opens when the pressure acting on the underside of the diaphragm exceeds the spring setting.

Pressure relief pilot control sensing shall be upstream of the pilot system strainer so accurate control may be maintained if the strainer is partially blocked. Pilot shall comply with NSF/ANSI 61 and certified lead free to NSF/ANSI 372 as a safe drinking water system component.

b. The pilot control system shall include a strainer, a fixed orifice closing speed and all required control accessories, equipment, control tubing and fittings. No variable orifices shall be permitted. The pilot system shall include an opening speed control on all valves sizes 3” and smaller as standard equipment. The pilot system shall include isolation ball valves on sizes 4” and larger as standard equipment. A full range of spring settings shall be available in ranges of 0 to 400 psi. Pilots to be manufactured by control valve manufacturer.

5. Material Specification for Pilot Control System

Pressure Relief/Sustaining Pilot Control

Body & Cover Bronze, Low Lead CuZn21Si3P or UNS C87850

Pilot Trim Brass & Stainless Steel 303

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Rubber Buna-N

Connections FNPT

Pressure Rating 400 psi Max

Temperature Range Water to 180˚F Max

Control Tubing Copper

Stainless Steel (optional)

Flexible Braided Stainless Steel (optional)

Polyethylene (optional)

Control Fittings Brass

6. Factory Assembly

a. Each control valve shall be factory assembled.

b. For all control valves, the factory assembly shall include the complete main valve, pilot valve(s), and all associated accessories and control equipment.

c. The Quality Management System of the factory shall be certified in accordance with

ISO 9001: 2008

d. During factory assembly the control valve manufacture shall make all necessary adjustments and correct any defects

7. Nameplates

a. Each Control Valve and associated pilot(s) shall be provided with an identifying nameplate.

b. Nameplates, depending on type and size of control valve, shall be mounted in the most practical position possible, typically on the inlet side of the valve body.

c. Nameplates shall be brass and a minimum of 3/32” thick, 3/4" high and 2-3/4” long.

8. Factory Testing

a. Each control valve shall be factory tested.

b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001:2008

c. Tests shall conform to approved test procedures.

d. The standard factory tests shall include a valve body and cover leakage test, seat leakage test, and a stroke test. Control valves and pilot valves, in the partially open position, with both ends closed off with blind flanges (valves) and pipe plugs

(pilots), shall be subject to an air test. The applied air pressure shall be 90 psi minimum. All air pressure tests shall be applied for a minimum of 15 minutes. No visible leakage is permitted through the valve seat, the pressure boundary walls of the valve body, valve cover, pilot body, pilot cover or the body-cover joint.

e. Control valve manufacturer shall, upon request, offer additional testing, such as high-pressure hydrostatic testing, positive material inspection testing, ferrite testing, liquid penetration inspection testing, magnetic particle examination testing and radiographic examination testing.

E. Product Data

1. The following information shall be provided:

a. Control Valve manufacturer’s technical product data

b. Control Valve manufacturer’s Installation, Operation and Maintenance manual

(IOM).

2. Provide specific information on all optional features specified above and confirm that these items are provided.

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3. The valve manufacturer shall be able to supply a complete line of equipment from 1” through 36” sizes and a complete selection of complementary accessories and equipment.

4. The control valve manufacture shall provide a computerized cavitation analysis report which shows flow rate, differential pressure, and percentage of valve opening. Cv factor, system velocity, and if there will be cavitation damage.

5. The manufacturer must also provide valve noise levels according to International Standards over the flow range of the valve. Noise calculation program will be specific to the control valve manufacturer, and based upon tests conducted by a third party, independent laboratory and will be able to provide dBA values for octave band frequencies between

21.5 and 8000 Hz. (Valves with KO trim calculations are per another industry accepted standard without the octave band frequency noise levels). Generic, third party noise calculations for non-specific control valves will not be accepted.

2.6 COMBINATION AIR & VACUUM VALVE WITH THROTTLING DEVICE AND

GOOSENECK

A. Application

1. Designed to protect pipelines from air lock and vacuum collapse by eliminating air and preventing vacuum formations in pipelines.

B. Materials

Component Material

Body & Cover Ductile Iron-ASTM A536

Other Material Available (optional)

Float Ball Assembly Stainless Steel

Internal Trim Parts 1000psi minimum collapse rating

Seals and O-Rings NBR

Hex Headed Cap Bolts Steel, Cadmium Plated

Other Material Available (optional)

Inlet Connection Details Flanges (2”-6”)

Female Threaded NPT (1”-4”)

Outlet Connection Details Female Threaded NPT (all sizes)

Operating Pressure Rating 300psi Maximum (all sizes)

Temperature Range Water to 180˚F

Any other wetted metallic parts Stainless Steel

Coating Fusion Bonded Epoxy Coating (Interior and Exterior);

ANSI/NSF 61 Approved / AWWA coating specifications

C116-03

C. Manufacture

1. Valve

a. The Combination Air Release and Vacuum Breaker Valve shall consist of three major components; a single valve body, a single cover assembly with seat installed and a stainless-steel float ball assembly. Cover assembly shall be securely fastened to the valve body with hex headed cap bolts.

b. Access to the internal float ball assembly, for necessary servicing, cleaning and repairing shall be possible without removing the air release valve from the pipeline.

2. Connections

a. Inlet Connections for Air and Vacuum Release Valves shall be flanged per

ASME/ANSI B16.42, Class 150 (sizes 2” thru 6”) or shall be female NPT threaded

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connections (sizes 1” thru 4”). Outlet connections, on all devices, shall be female

NPT connection.

3. Valve Body

a. Valve body shall be a single piece design. Body shall have a 1/4" NPT drain connection with pipe plug installed. No fabrication or welding shall be used in the manufacturing process of the valve body.

4. Valve Cover and Seat Assembly

a. Valve seat assembly shall be fastened onto the cover. Seat assembly shall be easily removable from the cover, for any necessary servicing or cleaning.

5. Factory Assembly

a. Each Air and vacuum Release Valve shall be factory assembled.

b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001:2008.

c. During factory assembly the Combination Air Release and Vacuum breaker Valve manufacture shall make all necessary adjustments and correct any defects.

6. Nameplates

a. Each Combination Air Release and Vacuum Breaker Valve shall be provided with an identifying nameplate.

b. Nameplates shall be mounted in the most practical position possible, typically on the top cover of the Combination Air Release and Vacuum Breaker Valve.

c. Nameplates shall be brass and a minimum of 3/32” thick, 1/2” high and 2” long.

d. Pertinent Combination Air Release and Vacuum Breaker Valve data shall be etched or stamped into the nameplate. Data shall include valve catalog number, size, and stock number.

7. Factory Testing

a. Each Combination Air Release and Vacuum Breaker Valve shall be factory tested.

b. The Quality Management System of the factory shall be certified in accordance with

ISO 9001:2008.

c. Tests shall conform to approved test procedures.

d. The integral stainless steel float ball only shall be hydrostatically pressure tested to

275 PSI. There shall be no internal leakage. Float ball test shall be applied for a minimum of 3 minutes.

e. The standard factory test, for the air release valve assembly, shall include installation of the valve onto a test manifold. Air release valve assembly shall be vertically positioned onto the test manifold with the outlet in the up position. Device to be completely filled with water.

f. The standard factory test, for the air release valve assembly, shall include a low-pressure seat leak test and a high pressure body and seat leak test. Pressure in test manifold is raised to 1-1/2 - 2 PSI. Water is removed from the top of the valve cover. Low pressure seat leak test shall be applied for a minimum of 3 minutes.

Pressure in the test manifold is than raised to 90 PSI, conducting a high-pressure seat and body leak test. High pressure seat and body leak test shall be applied for a minimum of 5 minutes.

g. No visible leakage is permitted through the air release valve seat, the pressure boundary walls of the valve body, valve cover or the valve body-cover joint. All leaking valves shall be rejected. h. Combination Air Release and Vacuum Breaker

Valve manufacturer shall, upon request, offer additional testing, such as high pressure hydrostatic testing, positive material inspection testing, ferrite testing, liquid penetration inspection testing, magnetic particle examination testing and radiographic examination testing.

8. Product Data

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a. The following information shall be provided:

1) Combination Air Rele3ase and Vacuum Breaker Valve manufacturer’s technical product data.

2) Combination Air Release and Vacuum Breaker Valve manufacturer’s

Installation, Operation and Maintenance manual (IOM)

2.7 2” NPT QUARTER-TURN BALL VALVE

A. Application

1. Domestic water valves intended to convey and control water for human consumption or dispense water for human consumption. Valves must comply with the SDWA, requirements of authorities having jurisdiction, and NSF 61 and NSF 372, or must be certified to be in compliance with NSF 61 and NSF 372 (by an ANSI-accredited third-party certification body) that the weighted average lead content at wetted surfaces is less than or equal to 0.25 percent.

B. Standards Compliance

1. ANSI B1.20.1

2. NSF 61/372 certified.

3. Conforms to MSS-SP-110 Specifications

C. Materials

1. Body; Cast Bronze

2. End Cap; Cast Bronze

3. Ball Seat; PTFE

4. Ball; Brass, chrome plated

5. Stem; Brass

6. O-Ring; Fluorocarbon (FKM)

7. Stem Packing; PTFE

8. Packing Nut; Brass

9. Lever Handle; Steel, Plated & Vinyl Grip

10. Lock Washer; Stainless Steel

11. Stem Nut; Stainless Steel

D. Description & Design Requirements

1. Provide two piece, standard port, lever handled, bronze ball valve for general potable water applications.

2. Valve Pressure-Temperature Ratings: Not less than indicated and as required for system pressures and temperatures.

3. Valve Sizes: Same as upstream piping unless otherwise indicated.

4. Valve Actuator Type:

a. Hand Lever: For quarter-turn valves.

2.8 DUCKBILL CHECK VALVE

A. Application

1. Fully passive flow control device that controls back pressures on overflow lines.

B. Standards Compliance

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1. ANSI 125/150#

C. Materials

1. Rubber Flex

2. 316SS retaining rings

3. Elastomer Selection

D. Description & Design Requirements

1. Rubber Flex Flanged Duckbill Check Valve

2.9 REDUCED PRESSURE BACKFLOW PREVENTOR

A. Application

1. For installation on potable water lines to protect against back siphonage and backpressure of contaminated water into the potable water supply.

B. Standards Compliance

1. ASSE Listed 1013

2. cUPC Listed

3. CSA Certified B64.4

4. AWWA Compliant C511, and C550

5. FM Approved

6. UL Classified

7. C-UL Classified

8. NYC MEA 49-01-M Vol 2

9. Approved by the Foundation for Cross Connection Control and Hydraulic Research at the

University of Southern California.

10. Meets the requirements of NSF/ANSI/CAN 61

C. Materials

1. The main body and access cover shall be epoxy coated ductile iron (ASTM A 536).

2. The epoxy coating shall be NSF Approved fusion epoxy finish

3. The seat ring and check valve shall be 300 series NORYL

4. The stem shall be stainless steel (ASTM A 276)

5. The seat disc elastomers shall be EPDM.

D. Description & Design Requirements

1. The Reduced Pressure Principle Backflow Prevention Assembly shall be certified to

NSF/SNSI/Can 61, ASSE Listed 103, and supplied with full port gate valves.

2. The checks and the relief valve shall be accessible for maintenance without removing the device from the line.

3. The maximum working water pressure shall be 175 PSI

4. Size as noted on the contract drawing plans, sections & details

2.10 SLAB PENETRATION SEAL

A. Application

1. For the permanent, hydrostatic seal for pipe penetrations through concrete slabs.

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B. Standards Compliance

1. ASTM B633, Nuts & Bolts

C. Materials

1. Seal Elements: shall be made of EPDM rubber

2. Pressure Plates: shall be made of reinforced nylon polymer

3. Nuts & Bolts: shall be made of steel with 2-part Zinc Dichromate & corrosion inhibiting coating.

D. Description & Design Requirements

1. Suitable for direct ground burial, normal atmospheric conditions, and conditions with occasional or periodic water contact.

2. Provides electrical isolation where cathodic protection is required.

3. Temperature Range: -40˚ - +250˚F

4. Size as noted on contract drawing plans, sections & details

2.11 DUCTILE IRON FITTINGS

A. Corrosion resistance

1. All ductile iron fittings to be fusion bonded epoxy coated for corrosion resistance.

B. Standards

1. All epoxy coated fittings to meet NSF61 Standards.

2.12 PIPE SUPPORTS

A. Materials

1. Pipe supports to be ductile iron, steel or other approved materials.

2. Supports to be fusion bonded epoxy coated for corrosion resistance.

B. Installation

1. Ensure adjustable hangers that are designed to support the weight of the pipe and its contents.

2. All bolts, nuts, and other hardware shall be corrosion resistant.

3. Ensure all supports are installed and inspected per manufacturer’s recommendations.

PART 3 - EXECUTION

3.1 Delivery, Storage and Handling

A. Delivery

1. Call 48 hours prior to delivery

2. Upon delivery, control valves to be unloaded and stored by:

a. Owner, district or municipality

B. Packing and Shipping

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1. Control valves specified herein shall be factory assembled. Any control valve appurtenances, accessories, parts and assemblies that are shipped unassembled shall be packaged and tagged in a manner that will protect the equipment from damage and facilitate the final assembly in the field.

2. Care shall be taken in loading, transporting and unloading to protect control valves, appurtenances, or coatings from damage. Equipment shall not be dropped.

3. Prior to shipping, the control valves and all associated accessories shall be acceptably packaged and covered to prevent entry of foreign material.

4. All packaged control valves shall be shipped, remain covered and stored on site until they are installed and put into use.

C. Valve Installation

1. Carefully inspect valves before installation. Operate valve to determine the units are in proper working order, with valves seating and operating properly.

2. Set plumb and securely brace into place.

3.2 Field Testing

A. A direct factory representative shall be made available by the equipment supplier for start-up service, inspection and necessary adjustments

END OF SECTION 33 14 19