Differential control vacuum valve

• Main Author: LONG SHUYING
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The utility model relates to a differential control vacuum valve, including valve body, first gas movable valve element and second gas movable valve element and differential gas accuse return circuit, first gas movable valve element goes up to open has the vacuum mouth, still is equipped with connector and contact opening on the first gas movable valve element, is equipped with the seal port between connector and the contact opening, and second gas movable valve element's one end is equipped with the closing plate, and the other end is equipped with the piston, and second gas movable valve element's one end stretches into fixed connection closing plate behind connector and the seal port in proper order, and the cross sectional area of closing plate is greater than the cross sectional area of seal port, be equipped with the cavity cavity in the valve body, second gas movable valve element's the other end is located the cavity cavity and the piston separates the cavity cavity for first die cavity and second die