Valve,
Humphrey, Air Piloted 501A-3-12-20, 1/2 Ports, 275 CFM AT 125 PSI
2&3WAY,N/0&C
Model 501A is
a multi-purpose valve offering high flow rates (to 275 scfm at 125
psig). With all ports on the same vertical plane, the 501A offers
straight-line plumbing. It is constructed of lightweight aluminum
which has been hardcoated for greater resistance to wear. With the
pilot pressure connected to pilot port, four functions are
possible.
- Normally
Closed: supply to NC port. NO port becomes exhaust port. CYL port
to work.
- Normally
Open: supply to NO port. NC port becomes exhaust port. CYL to
work.
- Directional:
supply to CYL port. Pilot air shifts NC open and NO closed.
- Di-Media:
supply #1 to NO; supply #2 to NC. CYL port is common.
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