I am having leakage on the intake valves of my new Dart heads and valves on my small chevy when shop air is applied into the compustion chamber threw the spark plug hole.

Could anyone help with my query. I work in a refinery and we have some old documents on leakage rates of isolation valves (ball valves). The data sheets specifies design shut off class/leakage rates (

Would like to know whether axial control valves of dresser design can be used in either direction of flow. Can any one guide specifically about Dresser Valve Model 78-AX-1/HW.

Monday I needed to drain a produced water gathering system for maintenance. This system is supplied by four gas wells with pump jacks on them. The pump jacks discharge directly into the gas gatherin

I am trying to determine in which standard the p/T ratings of PN designated valves is given. Or in other words, when a valve is stated to be PN16 Rated - to which standard is is rated as such?

I have a flow from a pump, and soon after the pump discharge want to be able to take off half the flow at times, and regulate the pressure. Is this possible with an isolation valve and single contro

Do any of you know design criterion for snuffing steam rates for a vent stack or relief valve discharge? I imagine that this flow is set by some minumum exit velocity, but perhaps there is more.

I've been tasked with designing a variety of valves for use within a Fuel Metering Unit. Usually we use O-rings for sealing purposes between sleeves and bores.