Humphrey 500, 501 & 590 series air-piloted valves are either double diaphragm poppet design (500 and 590) or of piston poppet design (501). 500 and 590 series valves require no lubrication and are ideal for use with instrument air or other media which prohibit lubrication. They have no sliding seals subject to cuts, metal seals subject to scratches, or O-rings subject to damage or replacement so they are also ideal for use with contaminated media and are unaffected by compressor varnish.
501 series valves require lubrication and offer the convenience of straight-line plumbing.  4-way valves are also available in the 501 series. Any 500, 501 or 590 series valve can be mounted in any position.

Features

• Brass Body
• Built In Mounting