Laserfiche WebLink
HD Fowler Company Submittal-Bid Item#27 <br /> RECOMMEND SPECIFICATIONS (NRS STYLE 7000)(OS&Y STYLE 7068)(2"-20") <br /> M&H AWWA C515 RESILIENT WEDGE GATE VALVES (2000) <br /> RECOMMENDED SPECIFICATIONS(2"-20") <br /> 1. Valves shall conform to the latest revision of AWWA Standard C515 covering resilient seated gate <br /> valves for water supply service. <br /> 2. The valves shall have a ductile iron body,bonnet,and 0-ring plate. The wedge shall be totally <br /> encapsulated with rubber. <br /> 3. The sealing rubber shall be permanently bonded to the wedge per ASTM D-429. <br /> 4. Valves shall be supplied with 0-ring seals at all pressure retaining joints. No flat gaskets shall be <br /> allowed. <br /> 5. The valves shall be either non-rising stem or rising stem,opening by turning left or right,and <br /> provided with 2"square operating nut or a handwheel with the word"Open"and an arrow to indicate <br /> the direction to open. <br /> 6. Stems shall be cast copper alloy with integral collars in full compliance with AWWA. All stems <br /> shall operate with copper alloy stem nuts independent of wedge and of stem(in NRS valves).OS&Y <br /> (rising stems)shall be bronze <br /> 7. All stems shall have two 0-rings located above the thrust collar and one 0-ring below. Stem 0-rings <br /> shall be replaceable with valve fully opened and subjected to full pressure. <br /> 8. The stems on 4"-20"shall have a low torque thrust bearing located above and below the stem collar <br /> to reduce friction during operation. <br /> 9. Waterway shall be smooth,unobstructed and free of all pockets,cavities and depressions in the seat <br /> area. Valves 4"and larger shall accept a full size tapping cutter. <br /> 10. The body,bonnet and 0-ring plate shall be fusion-bonded epoxy coated,both interior and exterior on <br /> body and bonnet. Epoxy shall be applied in accordance with AWWA C550 and be NSF 61 Certified. <br /> 11. Each valve shall have maker's name,pressure rating,and year in which it was manufactured cast in <br /> the body. Country of origin to be clearly cast into body&cover castings. <br /> 12. Prior to shipment from the factory,each valve shall be tested by hydrostatic pressure equal to the <br /> requirements of AWWA C509(and UL/FM where applicable). <br /> 13. Valves shall have all component parts cast and assembled in the USA and shall be manufactured by <br /> the M&H Valve Company. <br /> NOTE: It is recommended that valves be installed with stems vertical when used in raw sewage or <br /> sludge applications or in water with excessive sediment. <br /> September 1, 2012 / C515 Gate Valves <br />