BLOCK & BLEED GATE VALVE 2

[kpm21443]

I have a specs of gate Valve with BLOCK & BLEED service. I think there is no service called BLOCK & BLEED. I think BLOCK & BLEED should be the design. Please advise.

 

[LittleInch]

Expanding gate valves could do this duty / service. Service is an odd title alright, but duy is probably a better word.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[johnduncanson]

A double-expanding gate valve can provide "double block and bleed functionality by isolating up stream and down stream:

http://petrolvalves.com/valves/on-off-valves/gate/Expanding-Through-Conduit

 

[Kreot]

If you need a double block and bleed valve you have plenty of choices. Expanding gate valves gives you mechanical sealing, a slab gate can also do this as long as you have floating seats. Ball valves can also give you the correct sealing. Just be sure that you differentiate between double block and bleed (DBB), and double isolation and bleed ( DI&B).