by de-energizing solenoid valves 如何理解? fyi emergency shutdown functions shall be actuated by de-energizing solenoid valves to vent pneumatic actuators on separate shutdown valves. use of control valves as shutdown valves is allowed, if necessary, under special circumstances. 应通过电磁阀失电以放空独立停车阀上的气动执行器来执行紧急停车功能。如果需要,在特殊情况下,允许使用控制阀作为停车阀。查看更多