About gate Double Block and Bleed Valve
About gate Double Block and Bleed Valve
(OP)
I have a problem and hope get a hand. The problem are as following:
"Gate Double Block and Bleed Valve to ensure proper sealing in each branch. The DB&B Valves are specialized sealing valve with spring loaded seals on both sides."
What's mean of Gate Double Block and Bleed Valve?
Thanks a lot
"Gate Double Block and Bleed Valve to ensure proper sealing in each branch. The DB&B Valves are specialized sealing valve with spring loaded seals on both sides."
What's mean of Gate Double Block and Bleed Valve?
Thanks a lot





RE: About gate Double Block and Bleed Valve
There are also some special stop valves with 2 seats which are claimed to serve the same function as a double block and bleed, but I know little about them.
RE: About gate Double Block and Bleed Valve
I have seen big-inch gate valves with a split gate that was spring loaded. I can't recall ever seeing a body bleed between the gates though. It seems like having a significant pressure upstream of an evacuated body would require an impossbilty large spring (50 psid on a 16-inch gate would be 2,500 lbf trying to unseat the gate, I'd hate to try to pre-load that spring).
If you are unclear on what Double Block and Bleed is, there have been many interesting discussions of the concept in this forum. Most recently the thread on Trunnion Ball valves last week had some very good information in it.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
RE: About gate Double Block and Bleed Valve
RE: About gate Double Block and Bleed Valve
Bob Paul
paulrj@ccvalve.com
RE: About gate Double Block and Bleed Valve
Bonney-Forge Vitas, Ring-O Valve etc will be able to point you the right way.
Cheers VG