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Diameter DN65 the following pipeline control valve selection: 1, the ball valve: cold work pressure of these valves should be 600 psi, two cast bronze body, PTFE seat, the standard flow channel, separate packing nut , With adjustable stem packing, blowout stem and chrome-plated brass / bronze balls. Where pressure drop is a concern, valves that do not reduce the diameter of full-flow ball valves or similar structures are required. The valve connection port should have an ANSI thread of sufficient depth, or have a longer weld port, and be manufactured in accordance with the American Society of Valve and Fitting Manufacturers Standards Association MSS-SP110. (1), the standard flow channel valves can be used: the United States NIBCO T-580-70 ball valve (thread); S-580-70 ball valve (welding) (2) US NIBCO T-585-70 ball valve (thread); S-585-70 ball valve (welding) 2, check valve: check valve diameter DN65 should be used Y-shaped spin-on structure, and in accordance with the United States valve And Tubing Manufacturer Standardization Association MSS-SP80, working pressure 125 pounds, in line with American Society for Testing and Materials ASTM B 62 standard bronze body, configuration Teflon valve seat valve or spring seat with elastic seat Lift check valve. Valve connections should be threaded or welded. Available valves: (1) 125 lb. US NIBCO T-413-Y check valve (thread); S-413-Y S-480-Y (Welded) (3) Pipeline control valve with DN 65 and above 3 Butterfly valves: These valves should be lugs or international pipe Standard IPS Tubular Connection Port Valve Body and is manufactured in accordance with the American Standardization Institute for Valves and Fittings Manufacturers MSS-SP67; bore DN50 to DN300 Nominal working pressure is 200 psi non-impact cold water and DN350 is 150 psi. The body for thermal insulation has a 2-inch lengthened pipe made of cast iron or ductile iron. Disc material is plated ductile iron or aluminum bronze alloy with Buna-N seat and seal; or Buna-N coated disc with polymer-coated valve body. Stem should be 400 series stainless steel, the stem can not be exposed on the butterfly fasteners. Diameter DN65 to DN150 should be configured with 10 position throttle control handle; diameter DN200 butterfly valve above should be configured gear operating mechanism. Lugs and tubular butterfly valves should be used as shut-off valves and can be used at the end of the pipe at full pressure without the need for a downstream flange. Handle operated valves should be suitable for locking in the open or closed position. Valves that can be used: (1), lug body, ductile iron disc plating NIBCO LD3110-3 butterfly valve (handle operating mechanism); LD3110-5 butterfly valve (gear operating mechanism) (2) Body, aluminum bronze disc of the US NIBCO LD2100-3 butterfly valve (handle operating mechanism); LD2100-5 butterfly valve (gear operating mechanism) (3), the body of the valve, the rubber coated butterfly US NIBCO GD4775- 3 butterfly valve (handle operating mechanism); GD4775-5 butterfly valve (gear operating mechanism) 4, check valve: check valve diameter DN65 and above should be flat (on clip) structure, and the configuration of stainless steel spring, bronze valve Plate, Rubber Seat, Cast Iron Body, ASTM A 126 Class B or A 48, 125 or 150 lb. Flange. Available valves: US NIBCO W-920-W, KW-900-W or W-910-W spring-driven lift check valve Keywords: Valve