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Valve explanation

RE: Valve explanation

garciaf,
Please back the camera up a little so we get more of an overall shot.

Sometimes its possible to do all the right things and still get bad results

RE: Valve explanation

Garciaf,That Valves appears to be a High Pressure Trunnion Ball valve (http://www.jdbv.com/products/forgedtrunnionballval...

"A"- This may be for lubrication of the Trunnion(Stem)
"B"- This may be for lubrication of the upstream and downstream Seals

Sometimes its possible to do all the right things and still get bad results

RE: Valve explanation

I agree that "B" connections are injection points for lubrication of the seals, but "A" appears to be a bleed valve for typically checking seat tightness in a double block and bleed valve. The exhaust port is clearly visible.
Cheers,
John

RE: Valve explanation

I agree with JhonGP A = Bleed valve, and B = injection port.

RE: Valve explanation

IMHO, A is a body vent - that's why it has a hole in side of it. Just be careful if you use it - sometimes these screw in to release gas and out to seal - caught me out once as we were gassing up - a fitter had gone through and what he thought has checked tightness of vents and the thing leaked like sieve as soon as we put gas into it!

B I think are the lines to inject sealant onto the seal face.

find the sectional drawing and all will be revealed.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Valve explanation

Yes "A" is a body bleed. Often there is a recessed Allen screw where the small bolt is, but it does the same thing, loosen the small bolt and a stem comes off a seat and bleeds the valve body through the hole on the big nut. There is also a bump on the big nut (you can see it in the picture on the top face of the nut) to let someone know that it is a bad idea to put a wrench on that part. I've never had the big nut loosen when I operated the bleed valve, but I suppose it could happen.

"B" are seal fluid injection ports, not trunnion bearing lubricant (the trunnion bearings are in line with the actuator).

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

RE: Valve explanation

those are bleed valves . in some valve manufacturer, they weld this bleed valve are prior to deployment to permanent subsea use.

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