220523 - General Duty Valves for Plumbing PIping.pdf

09-01-20

22 05 23 - 1

SECTION 22 05 23

GENERAL-DUTY VALVES FOR PLUMBING PIPING

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section describes the requirements for general-duty valves for domestic water systems.

1.2 RELATED WORK

A. Section 22 11 23, Domestic Water Pumps

B. Section 22 35 00, Domestic Water Heat Exchangers.

1.3 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standard will govern.

B. American Society of Sanitary Engineering (ASSE):

1001-2017...............Performance Requirements for Atmospheric Type

Vacuum Breakers

C. American Society for Testing and Materials (ASTM):

B62-2017................Standard Specification for Composition Bronze or Ounce Metal Castings

D. International Code Council (ICC):

IPC-2018................International Plumbing Code

E. Manufacturers Standardization Society of the Valve and Fittings

Industry, Inc. (MSS):

SP-25-2018..............Standard Marking Systems for Valves, Fittings, Flanges and Unions

SP-70-2011..............Gray Iron Gate Valves, Flanged and Threaded

Ends

SP-71-2018..............Gray Iron Swing Check Valves, Flanged and

Threaded Ends

SP-80-2019..............Bronze Gate, Globe, Angle, and Check Valves

SP-85-2011..............Gray Iron Globe & Angle Valves, Flanged and

Threaded Ends

SP-110-2010.............Ball Valves Threaded, Socket-Welding, Solder

Joint, Grooved and Flared Ends

22 05 23 - 2

F. NSF International (NSF):

61-2019.................Drinking Water System Components – Health

Effects

372-2016................Drinking Water System Components – Lead Content

1.4 SUBMITTALS

A. Manufacturer's Literature and Data including: Full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity.

1. Ball Valves.

2. Gate Valves.

3. Check Valves.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Valves shall be prepared for shipping as follows:

1. Protect internal parts against rust and corrosion.

2. Protect threads, flange faces, grooves, and weld ends.

3. Set gate valves closed to prevent rattling.

4. Set ball valves open to minimize exposure of functional surfaces.

5. Block check valves in either closed or open position.

B. Valves shall be prepared for storage as follows:

1. Maintain valve end protection.

2. Store valves indoors and maintain at higher than ambient dew point temperature.

1.6 AS BUILT DOCUMENTATION

A. Not used.

PART 2 - PRODUCTS

2.1 VALVES, GENERAL

A. Asbestos packing and gaskets are prohibited.

B. Bronze valves shall be made with dezincification resistant materials.

Bronze valves made with copper alloy (brass) containing greater than 15 percent zinc shall not be permitted.

C. Valves in insulated piping shall have 2 inch stem extensions and extended handles of non-thermal conductive material that allows operating the valve without breaking the vapor seal or disturbing the insulation. Memory stops shall be fully adjustable after insulation is applied.

D. All valves used to supply potable water shall meet the requirements of

NSF 61 and NSF 372.

22 05 23 - 3

2.2 SHUT-OFF VALVES

A. Cold, Hot and Re-circulating Hot Water:

1. 2 inches and smaller: Ball, MSS SP-110, Ball valve shall be full port three piece or two piece with a union design with adjustable stem package. Threaded stem designs are not allowed. The ball valve shall have a SWP rating of 150 psig and a CWP rating of 600 psig.

The body material shall be Bronze ASTM B584, Alloy C844. The ends shall be non-lead solder.

2.3 MANUAL BALANCING VALVES

A. Not used.

2.4 THERMOSTATIC BALANCING VALVES

A. Not used.

2.5 CHECK VALVES

A. 3 inches and smaller shall be Class 125, bronze swing check valves with non-metallic disc suitable for type of service. The check valve shall meet MSS SP-80 Type 4 standard. The check valve shall have a CWP rating of 200 psig. The check valve shall have a Y pattern horizontal body design with bronze body material conforming to ASTM B62, solder joints, and PTFE or TFE disc.

2.6 GLOBE VALVES

A. Not used.

2.7 WATER PRESSURE REDUCING VALVE AND CONNECTIONS

A. Not used.

2.8 BACKWATER VALVE

A. Not used.

2.9 BACKFLOW PREVENTERS

1. Not used.

2.10 CHAINWHEELS

1. Not used.

2.11 THERMOSTATIC MIXING VALVES

1. Not used.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Valve interior shall be examined for cleanliness, freedom from foreign matter, and corrosion. Special packing materials shall be removed, such as blocks, used to prevent disc movement during shipping and handling.

22 05 23 - 4

B. Valves shall be operated in positions from fully open to fully closed.

Guides and seats shall be examined and made accessible by such operations.

C. Threads on valve and mating pipe shall be examined for form and cleanliness.

D. Do not attempt to repair defective valves; replace with new valves.

3.2 INSTALLATION

A. Install valves with unions or flanges at each piece of equipment arranged to allow service, maintenance, and equipment removal without system shutdown.

B. Valves shall be located for easy access and shall be provide with separate support. Valves shall be accessible with access doors when installed inside partitions or above hard ceilings.

C. Valves shall be installed in horizontal piping with stem at or above center of pipe.

D. Valves shall be installed in a position to allow full stem movement.

E. Check valves shall be installed for proper direction of flow and as follows:

1. Swing Check Valves: In horizontal position with hinge pin level and on top of valve.

3.3 LABELING AND IDENTIFYING

A. Not used.

3.4 ADJUSTING

A. Not used.

3.5 STARTUP AND TESTING

A. Perform tests as recommended by product manufacturer and listed standards and under actual or simulated operating conditions and prove full compliance with design and specified requirements. Tests of the various items of equipment shall be performed simultaneously with the system of which each item is an integral part.

B. When any defects are detected, correct defects and repeat test at no additional cost or time to the Government.

3.6 COMMISSIONING

A. Not used.

3.7 DEMONSTRATION AND TRAINING

A. Not used

- - E N D - - -