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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.
Codes and Standards for leak testing valves 2010-10-20
The general understanding is that the ANSI Standard for Control valve leakage allows for a specific percentage of the rated valve capacity to pass through the seats when closed.
Lift Plug Type Valves 2010-10-20
That Lift Plug valves are, in some processes, good alternatives for ball or gate valves as they are full bore, pressure tight and do not wear whilst being turned.
BYPASS, ISOLATION OF PSV WHILE UNIT IN SERVICE 2010-10-19
Stop valves may be installed between a pressure relief device and the operating vessel for the purposes of inspection, repair and/or replacement of the pressure relief device.
