Druck/Durchflussratensteuerventil

• Main Authors: HOSONO, MASAYUKI, YANG, QINGHAI
• Format: Patent
• Language: German
• Published: 22.04.2004
• Edition: 7
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CONTROLLING; 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; PHYSICS; REGULATING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A pressure adjustment device (23) is provided with a valve plug (82) for reducing the pressure of a pressure fluid based on the clearance between it and a seat part (94). A rod (86) has a seal (89) to be displaced together with the valve plug, and a spring element (76) which is attached to one end of the rod, to press the plug onto an annular projection (92) on the inside wall surface of a first valve body (12). When the secondary pressure supplied from a secondary connection (30) is balanced by the biasing force of the spring element, the valve assumes a closed state, and the plug rests on the seat part. An independent claim is included for a pressure or flow-rate control valve.