Thanks Reverman,
i wasn't concerned about possible damage because hopefully it will be setup and tested correctly (although maybe should add a note about replacing operator with gear if needed for test) nor even cost since I’m not buying it. we need to replace an existing valve (6in to...
thank you for your time and pointing out the errors in the specification, however the closure test in B16.34 is still the real question.
btw;
Operating condition is approx. 15 psig
Design is 30 psig
as specified the valve would need to operate at 30 psig. so as i tried to state, providing an...
thanks
the spec did not mention B16.34 but did mention that the max diff pressure is 20 psi. so in my opinion that operator/gearing should produce enough torque to open the valve again 20 psi.
still don't know how the closure test would be performed and why anyone would want to buy a extra...
thanks for the reply,
you are correct in that this is for steam applications, more specifically the connection/transistion from P-91 to 316 S.S. for super critical boiler instrumentation tubing
the next question is, is there any issues if the point where the transistion weld is made then...
have a question about the closure test in B16.34 and how it relates to the motor operator on a shutoff valve.
Process design conditons are (steam) approx. 20 psig and 275 degF.
valve supplier quoted a class 150# valve with a very larger motor operator; stating that to meet the closure test in...
