Can someone please help me out with the differences between; 1.a manual gate valve and hydraulically actuated gatevalve 2.needle valves and gate valves.

We have a fire safe test facility and will fire safe test according to API 607_5th two weeks from now. but, we have any problem for apparatus such as upstream pipework.

I am doing a analysis of the component in the gate valve and this two ring confuse me.

The subject sounds like a noob question, but after 18 years in industry, I still haven't had a decent explanation regarding sudden and catastrophic failure of packing materials under pressure... I've

Having an impossible time tracking down a resistance coefficient for a 2" ball-type check valve. Can anyone help me out?

While I was making some midnight rounds on a start-up, I found an operator draining a large amount of condensate from a waterlogged exchanger to grade. He asked why it was taking so long.

I am installing an orifice in a system with a check valve. A far as flow is concerned in relation to the cracking pressure of the check valve, does it matter if I put the orifice upstream or downstrea

We were told today that we should use check valves on the discharge side of our slurry pumps to prevent possible (major) damage.