Introduction to a temperature-controlled shut-off exhaust valve applied in pneumatic emergency shut-off valves

Thread Content

Introduction to thermal control shut-off valves: When the temperature control shut-off valve detects excessive heat caused by a fire in the vicinity, it immediately releases the gas from the pneumatic actuator and shuts off the air supply line to the actuator. Since the temperature-controlled shut-off exhaust valve responds to heat rather than flame, it provides significantly improved protection compared to the burning through of traditional plastic pipes. The testability and reset capability of the temperature-controlled exhaust valve make it a better choice than fuse-based shut-off devices or plastic-burned-through pipes. The temperature-controlled exhaust valve triggers quickly to cut off the air supply, preventing the air in the facility from providing oxygen for a fire. The temperature control element senses the ambient temperature and, through phase change, rapidly generates the force and motion necessary to activate the temperature-controlled exhaust valve. This component is reliable, as temperature control is an inherent property of the alloy. Thermostatic elements have been in successful use in military, industrial, and consumer applications for many years. Manual reset of the temperature-controlled exhaust valve shutdown allows for routine performance testing as part of a safety maintenance plan. The heat blower will start quickly; the temperature control shuts off the exhaust valve. After a brief cooling period, the temperature-controlled shut-off exhaust valve can be easily reset without the use of tools to continue providing protection. The temperature-controlled exhaust valve is connected via two internal threads, allowing it to be easily installed between the pneumatic supply and the spring-return actuator. Key features: Rapid response to rising temperatures; the flame vent is used to restore the actuator’s air pressure to a fail-safe state, thereby shutting off the actuator’s air supply line. It requires no power source and can activate on its own. It is compatible with all pneumatic actuators, does not come into contact with process fluids, and is easy to test and reset. Regarding the thermally controlled shut-off exhaust valve: In the event of a fire or overheating emergency, if the air temperature exceeds the preset activation threshold set by the facility, the thermally controlled shut-off exhaust valve will carry out the following two emergency actions simultaneously: First, it shuts off the air supply line to prevent the air supply from fueling the fire. II: It allows the air contained within the actuator to be discharged through the temperature-controlled shut-off exhaust valve, which enables the spring to reset the actuator and return the valve to its fail-safe position.