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Catalog 3501E Metric Flow Control Blocking Valves Prestobloc - Pilot-operated blocking fittings Principle Prestobloc pilot-operated blocking fittings are designed for mounting directly to the cylinder ports. Available with push-in or threaded Moving terminations, these function fittings permit safe and immediate stopping of the piston rod by blocking the cylinder supply and exhaust. Operation � Pilot operated diaphragm maintains full flow when pilot signal is present. exhaust � Spring closes the poppet valve locking air in the cylinder when the supply pilot signal is removed. P C Pilot signal � Prestobloc fittings used in conjunction with Prestoflow flow regula- tors are mounted on inlet and outlet ports. � Pilot signal should be independent from the control valve. Prestobloc fitting Control signal Blocked Diaphragm To power valve exhaust supply P Poppet valve Removal Spring initiatesblocking Blocking principle Cylinder Technical features BODY BOLT BOLT SEALING PILOT WORKING WORKING TERMINATIONS MATERIAL MATERIAL THREAD DEVICE TERMINATION TEMPERATURE PRESSURE Zinc Alloy Brass 1/8 BSPP Nylon 6 mm - 1/4 - 1/2 4 mm - 8 mm From 0� to 140 PSI Epoxy Coated 1/4 BSPP Washer 12 mm BSPP Push-In +150� F 3/8 BSPP Push-In Female 1/2 BSPP Thread Applications 1 2 Safety stop Stroke control Safety locks Prevents descent under load in the event of Stops the piston in various positions for Safety guards for assembly and punch power failure conveying and handling applications. presses. Combination with an emergency switch: restarting the cylinder after resetting the emergency switch. Parker Hannifin Corporation C19 Parker Brass Products Division Otsego, Michigan
Goodyear Rubber Products
