Can someone suggest a good source to guide in the design of a gas control valve trim (plug and seat) set? I must comply with NACE MR0175.

Can anyone explain what is anti static and double block and bleed in a ball valve, please explain how it works.

Sitting here trying to find a good solution for a sanitary valve, to be used in waterbased paint production. Our concerns is how to avoid bacteria contamination.

This is a personally financed effort, so I don't have an aerospace sized budget, but my budget is non zero. I'm looking for advice on valves, my Servo driven ball valves have too much slop/hysteresis.

I was recently teaching a class that included a section on valves. When I got to Ball Valves I said that "while quarter-turn plug valves have been available for most of the 20th century, the earliest

this is in reference with ASME - B 16.10 ... 2002 Q1) in this std mating flanges are defined to be as per B 16.5 and B 16.47 series A... but wht bout flanged valves with series B? ( ref pg 2)

I'm trouble shooting an instesting problum. Numerious 3" 300# ball valves (floating design) hold fine at high pressure (600 psi) but leak at low pressure (aprox 15psi head pressure) when pumps are off

I have a special problem with respect to valve that are used in offshore oil and gas industry. A perticular manufacturer supply us valves complying all the testing and specification requirement. But i