Pneumatic And Hydraulic Equipment Page 600

AIR PILOTED VACUUM VALVES Humphrey air piloted valves are 2-position, 2-way or 3-way, normally closed only valves which require no lubrication, withstand contamination, and will not stick. They have no sliding seals subject to cutting and no metal seals subject to scratching. Full orifice throughout. For dimensions and other basic features, please consult equivalent model numbers (less VA prefix) in the Air-Piloted Valves section of this catalog. NORMAL This principle is employed in all Prefix "VA" piloted valves rated 0-29.5 inches Hg. For vacuums exceeding 29.0 inches Hg., order valves with fluoroelastomer diaphragms. ACTUATED VA125A Model VA125A is a full 0.125 inch orifice, air-piloted valve with spring and vacuum return. It requires an air pilot of 20 to 125 psig. Connections are 1/8 inch NPT. VA250A Model VA250A is a full 0.250 inch orifice, air-piloted valve with spring- and vacuum-return. It requires an air pilot of 20 to 125 psig. Connections: 1/4-inch NPT. VA500A Model VA500A is the 0.500 inch orifice version of the VA250A valve but is furnished with brass body and requires an air pilot pressure of 40 to 125 psig. VA590A Model VA590A is the 0.625 inch orifice version of the VA500A valve but is furnished with an anodized aluminum body and 3/4-inch NPT connections. Part No. Port Price VA125A-3-10-21 1/8" $36.67 VA250A-3-10-21 1/4" $60.95 VA500A-3-10-21 1/2" $169.41 VA590A-3-10-21 3/4" $190.04 Humphrey (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 600 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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