Pilot stage for a pressure control valve

A pilot stage for a pressure limiting valve comprises an axially displaceable valve piston (110) which delimits a valve chamber (141) axially at one end and forms a valve seat (140) therein for a closing cone (104). In a pressure chamber (164), the valve piston (110) forms an actuating surface which...

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Bibliographische Detailangaben
Hauptverfasser:	BOURKEL, ARSENE, POST, KARL-HEINZ, LANFERMANN, BERND, TRATBERGER, KARL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A pilot stage for a pressure limiting valve comprises an axially displaceable valve piston (110) which delimits a valve chamber (141) axially at one end and forms a valve seat (140) therein for a closing cone (104). In a pressure chamber (164), the valve piston (110) forms an actuating surface which is considerably larger than the free cross-section of the valve seat (140). By subjecting this pressure chamber (164) to pressure, a large hydrostatic force is exerted on the valve piston (110), this force being opposed to the closing force of the pressure-setting spring (106). A housing stop (130) defines a first axial end position of the valve piston (110) in the direction of this hydrostatic force. The pilot stage has improved properties both in manually adjustable and in proportional pressure limiting valves.