Ball Valve Question?

[Slick]

I've decided to go with 2 ball valves mounted to my cart for the PP256 for switching between air and argon.

I was wondering if there is a certain rated ball valve I should look for?

[performance]

3/8" should be fine

[Slick]

They have different ratings also some for natural gas, some for fluids, others for "general" and PSI ratings.

My main concern was if Argon could get past the seals.

What I was thinking was 1/4 as the internal passage is larger than what goes into the machine. I have one thats rated up to 250 psi, has a yellow handle, and has 600 GWP and 150 SWP cast into it.

[performance]

Argon is heavy/dense. It'll sink in air. And its totally non reactive. I doubt you'll have any problem with any material rated for gas line pressure, particularly a metal/brass valve.

[Tony_F]

Sorry Slick I just saw your question in another thread, I've posted the response here as well.

Tony

http://www.mcmaster.com/

- 4112T23 COMPACT HIGH-PRESSURE BRASS BALL VALVE, 1/4" NPT FEMALE X MALE, LEVER HANDLE
- 50785K72 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, TEE
- 5346K16 BRASS BARBED HOSE FITTING, ADAPTER FOR 5/16" HOSE ID X 1/4" NPTF PIPE
- 50785K43 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, MALE X FEMALE 90 DEG ELBOW
- 50785K12 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, NIPPLE, 1-1/2" LENGTH

[Slick]

Sorry Slick I just saw your question in another thread, I've posted the response here as well.

Tony

http://www.mcmaster.com/

- 4112T23 COMPACT HIGH-PRESSURE BRASS BALL VALVE, 1/4" NPT FEMALE X MALE, LEVER HANDLE
- 50785K72 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, TEE
- 5346K16 BRASS BARBED HOSE FITTING, ADAPTER FOR 5/16" HOSE ID X 1/4" NPTF PIPE
- 50785K43 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, MALE X FEMALE 90 DEG ELBOW
- 50785K12 MED-PRESSURE BRASS THRD PIPE FITTING, 1/4" PIPE SIZE, NIPPLE, 1-1/2" LENGTH

Its ok Tony, thats pretty much what I did with a local supplier!