WJ641H bellows pneumatic shut-off valve

A, WJ641H bellows pneumatic shut-off valve - Overview: WJ641H bellows pneumatic shut-off valve is a pneumatic shut-off cut-off valve, normally open type of pneumatic bellows shut-off valve, in working condition solenoid is energized to open the gas supply valve to open, That power solenoid valve auto exhaust valve automatically closes, and the remote console (computer) supporting the use, use of air control valve is opened and closed. Dual bee design (bellow + packing) if bellows failure, the stem packing will prevent leaks, ensure stem zero leakage, providing no maintenance conditions. When the accident occurred, the valve coil instantaneous power, two-way solenoid valve is triggered quickly exhaust and enters the locked state. In this case, even if dismantling supply. Gas source. The valve is off when not re-open automatically. When the staff to deal with the accident, it must be free of air pressure, no power of the state for maintenance, accident after treatment, artificial re-open the valve, the gas supply would be restored, the power-ventilation. Valves are pilot-valve, easy and flexible open, even if the pressure reaches 1.6MPa open very easily, when the actuator to the pressure, the pilot valve opens. When the actuator pressure relief valve closes automatically present, this valve with a check valve principle, only one-way cut off, it must pay attention to road signs when installing flow valve (the valve flow path direction of the high-low) Second, WJ641H pneumatic bellows shut-off valves - the Performance Specification Table Nominal pressure 1.6 MPa Test pressure strength test seal test 2.4 1.76 1.76 airtight seal test test 0.6 the maximum operating temperature -29 ~ + 300 ℃ Suitable medium: water, steam, hot oil, three, WJ641H ripple pneumatic tube shut-off valve - Technical Data Sheet drive mode diaphragm actuator electric angry open the single-acting closing time of less than one second ≤1S ≥0.5 MPa working pressure actuator flow 0-12 M / h Working pressure 0.1-1.6 MPa electromagnetic valve voltage and current DC: DC24V4-20mA AC: AC220V solenoid valve Explosion levels EexmllT4 / EexllT5