Pressure Seal Bonnet 3

[Procurement2]

I have attached the drawing of check valve. It looks like bolted bonnet but my manufacturer informs it is a pressure seal bonnet. Can any one explain to me whether the atatched valve is with bolted bonnet or pressure seal bonnet

 

[hsbcn]

hi Procurement2:

this looks like a pretty standard piston check valve to me. a pressure seal should look more like this:

http://www.tianvalve.com/img/english/Forged Steel Valves/Pressure-seal swing check valve-1.jpg

the body is tested at 79kg/cm2. that's not a lot of pressure, and you wouldn't need a pressure seal for that...

My focus: Alloy Valves in duplex, super duplex, alloy 20, monel, inconel, incoloy, hastelloy, titanium, 904L, zirconium and uranus Valve Stockist Valvulas

 

[pennpiper]

Procurement2,
Your valve and the one shown on the drawing by hsbcn are both Pressure Seal Bonnet Check Valves.
I say this, not because your drawing is labeled "Pressure Seal Bonnet Check Valve" but because the detail of the internals clearly shows the Pressure Seal Bonnet Design.

prognosis: Lead or Lag