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OS&Y Valves NFPA requirement 2010-10-21
"A listed outside screw and yoke (OS&Y) gate valve shall be installed in the suction pipe. No valve other than a listed OS&Y valve shall be installed in the suction pipe within 50 ft (16 m) of the pum
Soft seat material 2010-10-21
Nylon, PTFE, RPTFE, Devlon & PEEK. Some sites will include many plastics that you should consider. You will find lots. Consider a few thoughts beyond the valve manufacturer.
Valve Seats 2010-10-21
Require a 6" 1500# ball valve the current datasheet specification gives the seat material as REINFORCED TEFLON(PTFE + 15% FIBER GLASS).
Actuator type for shut off valve 2010-10-21
First consideration for an on-off valve is to get enough force to cause the flow to stop. That is dependent on the valve.
PTFE for high performance butterfly valve 2010-10-21
The valve should be used below 300 psi and 410 F.For that pressure and this temperature, 100% PTFE is out of limits, since pure PTFE temperature resistance ends at 200dC, and you operate at 210dC.
Butterfly valve leaks over time 2010-10-20
The body is made from polypropylene, with a butterfly made of HDPE. It contains a circumferential nitrile seal. The system pumps wine up to a dynamic pressure of 80kPa.
Seating load for Ball valve 2010-10-20
How much seating force required to control leakage for following requirements.Allowable leakage when closed condition is 0.5cc/min.
Stellite or electro nickel plated 2010-10-20
Noting that on globe and check valve the use of stellite as hard facing and corrosion resistant layer on trim parts is the best solution for many vendors.
