Ball valve with Male Thread
Ball valve with Male Thread
(OP)
Hello,
I want to use forged ball valve for drain and vent application. Valve is of DN15 & DN20, I am planing to to have Male thread connection by that it can directly get assembled on Threaded Half coupling CL3000. I am worried about ease of availability and the orientation of the valve handle. Can any one suggest me what will be difficulties if I go with Male threaded end connection of the valve.
I want to use forged ball valve for drain and vent application. Valve is of DN15 & DN20, I am planing to to have Male thread connection by that it can directly get assembled on Threaded Half coupling CL3000. I am worried about ease of availability and the orientation of the valve handle. Can any one suggest me what will be difficulties if I go with Male threaded end connection of the valve.





RE: Ball valve with Male Thread
RE: Ball valve with Male Thread
"I am worried about ease of availability and the orientation of the valve handle"
That is one of the draw backs of such a system - you can't guarantee how many turns it is going to take to get to pressure tightness. You can never undo it but might not be able to turn it enough to get access.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Ball valve with Male Thread
RE: Ball valve with Male Thread
RE: Ball valve with Male Thread
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: Ball valve with Male Thread
We tried 3 piece socket weld valve with prewelded spool of 100 mm to avoid sealing damage due to weld heat. But the complete assembly is goes more than 200mm and its consuming to much place. Have a look on attachment Which is in my mind. Regarding removal I can remove it by just rotating valve through the threads.
Or is there any other way to get assembly more compact.
RE: Ball valve with Male Thread
RE: Ball valve with Male Thread
If limited by the space, disassemble the 3-piece ball valve to weld the end and then reassemble can be a good option as BCD stated above.
RE: Ball valve with Male Thread
RE: Ball valve with Male Thread
Sure you need to look at it, but if you open the valve and either wrap the valve in something wet and / or fill the valve to just below the seal location with a damp plug equal to the bore then reduce the heat input to a minimum ( stop welding after one pass - do it in bursts), then you shouldn't get to a situation where you run into trouble.
Or submerge the valve in water open, close the ball (trapping the water) then drain off either end and weld. If it gets really hot then you will see steam coming out the end seal....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.