Pex Plumbing Valves
April 4th, 2009 | 
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PEX Plumbing Valves include all the fittings and valves needed to make connections in a PEX plumbing system. These include SSC PEX Fittings (Clamp PEX Fittings) and Expansion Style PEX Fittings(ProPEX Fittings). To make SSC Connections, SSC PEX Tool is needed, whereas to make ProPEX connections a Wirsbo Expander tool is required.
ProPEX chrome-plated PEX Stop Valves come in either straight or angle stop configurations. These PEX stop valves are used for point-of-use shut-off at the fixture. Both Valves connect 1/2″ PEX Tubing to 3/8″ O.D. Risers. Compression inserts and rings for the 3/8″ riser connections are included with the valves. ProPEX Tool is required to make the 1/2″ ProPEX connections. ProPEX Rings are usually purchased separately.
ProPEX Ball Valve (brass) main features include: in-line, shut-off valve for 3/8″, 1/2″, and 3/4″ PEX Tubing. ProPEX Angle Ball Valve (brass) features are: a quarter-turn shut-off valve for 1/2″ PEX Tubing. ProPEX Tool is required. ProPEX Rings are purchased separately as well.
PEX Plumbing is the future of the plumbing industry. PEX Plumbing involves PEX tubing, PEX fittings, PEX manifolds or Plumbing Manifolds, and the PEX Tools that accompany these parts.
John Parker
http://www.articlesbase.com/business-articles/pex-plumbing-valves-86606.html
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Posted in Ball Valves
Can I use plumbing check valves in a pneumatic system?
I understand that air behaves as a fluid so therefore i figure it may work but i would like some verification since water and air are molecularly different. I would plumbing grade check valves temporarily for testing because they are cheaper and easier to get. I would eventually get pneumatic grade valves once i know that my system works as intended.
Yes, quite often you can. Many smaller screwed brass valves have AWG ratings which means "air, water gas". (That may be OWG, oil, water, gas) These are around the 125 -250 psig rating. This includes gate, globe, check. I do not know what a plumbing grade or pneumatic grade valve would be in this pressure range. We used the same valves, 125-250 psi screwed or 125 – 600 pound ANSI flanged and welded , equally for steam, water, compressed air and some gasses based on the pressure ratings. We used the Power Piping Code for nearly all services.
When we were in high pressures gasses we used CGA ratings. And there were specialities for extremely high pressure gasses.
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