2008-276 D - Laserfiche WebLink

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that meets ASTM D429. The stem shall be cast bronze and have an integral thrust collar with a Deh in thrust bearing above and below the collar. The gate valve shall have two 0 - rings set in machined grooves in the seal plate. The stem seal plate shall have an O-ring gasket to seal against the bonnet secured with bolts and nuts. The body, bonnet, and seal plate shall have a factory -applied thermoplastic epoxy coating on all interior and exterior surfaces. All internal parts shall be accessible for repair or maintenance without removing the body from the line. Valve shall be Style 4067 as manufactured by M&H Valve Co., Metroseal 250 as manufactured by U.S. Pipe, American -Darling or Clow. B. A geared side -mounted actuator with 2" operating shall be used where a top mount operator will not have adequate cover. Contractor to confirm prior to ordering valve. 2.10 CHECK VALVES A. High Service Pump The Globe Style Silent Check Valves shall be fully automatic, spring loaded, and guided disc. The valve shall open as the pump starts to closed just prior to flow reversal upon pump outage. The valve shall have a cast iron body, bronze seat, disc and bushing and stainless steel spring. All internal parts shall be field replaceable for ease of maintenance. The valve shall be model GC as manufactured by Multiplex Manufacturing Co., CRISPIN Valve Div., Berwick, PA. 2.11 AIR RELEASE VALVE A. Air release valves shall be the type to automatically exhaust large quantities of air during filling and allow air to re-enter when draining or subject to a negative pressure. B. Valve shall be 1" with N.P.T. threaded inlet and outlet. The valve body shall be cast iron. The float, internal float guides and trim shall be 316 stainless steel. The seat shall be BUNA-N. C. Valve shall be manufactured by Crispin, Valmatic or approved equal. 2.12 PIPE COUPLINGS A. Couplings shall be EPDM gasketed, sleeve -type, with diameter to fit existing pipe. Coupling shall include a steel middle ring, follower rings, wedge -section gaskets and truck head type steel bolts. Couplings shall be manufactured by Dresser, or equal. 2.13 TAPPING SLEEVE & VALVE A. Tapping sleeve shall be 304 stainless steel with flanged outlet and 304 stainless steel bolts: Sleeve shall be JCM #432, Smith/Blair (Rockwell) #662, Ford Fast, or equal. All sleeves shall have a minimum working pressure of 150 psi. All taps shall be machine drilled, no burned taps will be allowed B. Tapping valves shall be resilient seat type with a flanged joint on the inlet side and a mechanical joint on the discharge side of the valve. Tapping valves shall have a 2 -inch operating nut. Working pressure rating shall not be less than 200 psi. Gaskets between the 044572017 15100-8