New product recommendation from Shanghai Yonglong Valve Factory: "Automatic Tank Fuse Valve"
The automatic fuse valve of the storage tank adopts a safety reflux valve structure. The upper valve chamber is equipped with a spring loaded bracket and a handwheel device. The high-temperature fuse is used to pull the compression spring force to keep the valve in a normally open state. When the ambient temperature exceeds 75 ℃± 5 ℃, the alloy of the fuse softens and disconnects, and the fuse valve closes on its own. Plays a protective role for equipment and facilities.

Automatic fuse valve for storage tanks, also known as "high-temperature fuse valve" or "emergency fuse valve", is a combustible gas/liquid high-temperature fireproof self melting and closing device installed at the loading and unloading ports of storage tanks, spherical tanks, and oil depots. In the event of abnormal high temperature in the environment, the melting piece of the tension spring installed on the actuator melts and breaks, relying on the spring force and the pressure of the storage tank medium to push the piston down. The valve automatically closes and cuts off the flow of the medium, effectively preventing fires and protecting the safety of storage tank facilities.
When the automatic fuse valve of the storage tank is accidentally closed, it can be opened/closed by manually rotating the handwheel to notify the manufacturer to provide a fuse link. When replacing the fuse link, rotate the handwheel to open it in place, then replace the melted fuse link, and then rotate the handwheel back to the closed direction.
The related names of automatic fuse valves for storage tanks are "high-temperature fuse valves for liquid ammonia storage tanks, high-temperature fuse valves for oil storage tanks, and high-temperature fuse valves for gas storage tanks"