Valve explanation

[garciaf]

Here´s my issue:

I would like to know what is "A" and "B" in the photo attached.
I dont have information (manual)
Please help me I'll appreciate your comments.
What is the purpose of "A" and "B".

 

[pennpiper]

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

 

[garciaf]

Here is the image you're aksking
thanks for your help.

This valve is a ball valve.

 

[pennpiper]

Garciaf,That Valves appears to be a High Pressure Trunnion Ball valve (

http://www.jdbv.com/products/forgedtrunnionballvalve-ID80.html#.WFHGDX0iWjI

"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

 

[JohnGP]

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

 

[SPDL310]

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

 

[LittleInch]

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.

 

[zdas04]

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).

[bold]David Simpson, PE[/bold]
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

 

[hsemus]

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