VA 22 05 23-2009 GENERAL-DUTY VALVES FOR PLUMBING PIPING.pdf

1、12-09 22 05 23 - 1 SECTION 22 05 23 GENERAL-DUTY VALVES FOR PLUMBING PIPING SPEC WRITER NOTE: Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A. This section describes

2、 the requirements for general-duty valves for domestic water and sewer systems. 1.2 RELATED WORK A. Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING. 1.3 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES. B. Manufacturers Literature and Data: 1. Val

3、ves. 2. Backflow Preventers. 3. Pressure Reducing Valves. 4. Backwater Valves5. All items listed in Part 2 - Products. 1.4 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 des

4、ignation only. B. American Society for Testing and Materials (ASTM):A536-84(R 2004) Standard Specification for Ductile Iron Castings C. American Society of Sanitary Engineering (ASSE) ASSE 1003-01 (R 2003) Performance Requirements for Water Pressure Reducing Valves ASSE 1012-02 . Backflow Preventer

5、with Intermediate Atmospheric Vent ASSE 1013-05 . Reduced Pressure Principle Backflow Preventers and Reduced Pressure Fire Protection Principle Backflow Preventers D. International Code Council (ICC) IPC-06 (R 2007) International Plumbing Code E. Manufacturers Standardization Society of the Valve an

6、d Fittings Industry, Inc. (MSS): Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 23 - 2 SP-25-98 . Standard Marking System for Valves, Fittings, Flanges and UnionsSP-67-02a (R 2004) Butterfly Valve of the Single flange Type (Lug Wafer) SP

7、-70-06 . Cast Iron Gate Valves, Flanged and Threaded Ends. SP-72-99 . Ball Valves With Flanged or Butt Welding For General Purpose SP-80-03 . Bronze Gate, Globe, Angle and Check Valves. SP-110-96 Ball Valve Threaded, Socket Welding, Solder Joint, Grooved and Flared Ends 1.5 DELIVERY, STORAGE, AND HA

8、NDLING 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 angle, gate, and globe valves closed to prevent rattling. 4. Set ball and plug valves open to minimize exposure of functi

9、onal surfaces 5. Set butterfly valves closed or slightly open. 6. 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. C. A sling

10、shall be used for large valves. The sling shall be rigged to avoid damage to exposed parts. Hand wheels or stems shall not be used as lifting or rigging points. PART 2 - PRODUCTS 2.1 VALVES A. Asbestos packing and gaskets are prohibited. B. Bronze valves shall be made with dezincification resistant

11、materials. Bronze valves made with copper alloy (brass) containing more than 15 percent zinc shall not be permitted. C. Valves in insulated piping shall have 50 mm or DN50 (2 inch) stem extensions and extended handles of non-thermal conductive material that allows operating the valve without breakin

12、g the vapor seal or disturbing the insulation. Memory stops shall be fully adjustable after insulation is applied. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-09 22 05 23 - 3 D. Exposed Valves over 65 mm or DN65 (2-1/2 inches) installed at an

13、elevation over 3.6 meters (12 feet) shall have a chain-wheel attachment to valve hand-wheel, stem, or other actuator. E. Ball valves, pressure regulating valves, gate valves, globe valves, and plug valves used to supply potable water shall meet the requirements of NSF 61. F. Shut-off: 1. Cold, Hot a

14、nd Re-circulating Hot Water: a. 50 mm or DN50 (2 inches) and smaller: Ball, MSS SP-72, 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 1035 kPa (150 psig)

15、 and a CWP rating of 4140 kPa (600 psig). The body material shall be Bronze ASTM B584, Alloy C844. The ends shall be solder, b. Less than 100 mm DN100 (4 inches): Butterfly shall have an iron body with EPDM seal and aluminum bronze disc. The butterfly valve shall meet MSS SP-67, type I standard. The

16、 butterfly valve shall have a SWP rating of 1380 kPa (200 psig). The valve design shall be lug type suitable for bidirectional dead-end service at rated pressure. The body material shall meet ASTM A 536, ductile iron. c. 100 mm (DN100) (4 inches) and larger: 1) Class 125, OS replace with new valves.

17、 3.2 VALVE 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 ac

18、cess 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. Provided by IHSNot for ResaleNo reproduction or networking permitted with

19、out license from IHS-,-,-12-09 22 05 23 - 9 E. Install chain wheels on operators for ball butterfly gate and globe valves NPS 100 mm or DN100 (4 inches) and larger and more than 2400 mm (12 feet) above floor. Chains shall be extended to 1500 mm 3600 mm (60 inches) above finished floor. F. Check valv

20、es shall be installed for proper direction of flow and as follows: 1. Swing Check Valves: In horizontal position with hinge pin level. 3.3 ADJUSTING A. Valve packing shall be adjusted or replaced after piping systems have been tested and put into service but before final adjusting and balancing. Replace valves shall be replaced if persistent leaking occurs. - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-