Pneumatic And Hydraulic Equipment Page 587

250A-3-11 Normally open, 0.250-inch orifice valve. Furnished with pilot booster. Part No. Port Size Price 250A-3-11-21 1/4" $54.47 250-4A 4-way, 5-port valve with common supply and exhaust ports. 250-4AA Identical to the 250-4A valve but has an internal compensating orifice which maintains actuated position after momentary pilot signal, maintains "trapped" pilot reserve to compensate for minor leaks, and speeds both the opening and the closing response time. Part No. Port Size Price 250-4A-21 1/4" $115.73 250-4AA-21 1/4" $139.78 500A 2-way or 3-way, normally closed only valve offering high flow rates (to 200 scfm at 125 psig). The 500A requires no lubrication. Pilot air is isolated from valved media for applications requiring air pilot control for air, water, oil, instrument air, and gases. 500AB Identical to the 500A valve but has a booster piston to reduce pilot air pressure requirements. Part No. Port Size Price 500A-3-10 1/2" $137.44 500AB-3-10 1/2" $163.63 AIR PILOT VALVES H U M P H R E Y Humphrey JHF Catalog [ Volume 7 ] (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j 587 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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