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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.
The best valve for an actuator 2010-10-19
Operations has had problems with the current actuated startup bypass valves. The fluid in this aplication is Blend Oil. There is currently a 30s shutoff actuator on a 1/4 turn ball valve.
Cryogenic Globe Valve Flow Direction 2010-10-19
The service is liquid oxygen with this valve located on the upstream side of the liquid oxygen vaporizers.
Inside diameter for BW ends ball valve 2010-10-19
Full Bore does not mean piggable. It shall be inteprated as per API 6D standard bore dimension = 633 mm.
