Shut-off valve has excellent technical performance, low load loss and high reliability, installed in the liquid ammonia, liquefied petroleum gas, gas or gas pipeline, and long-distance gas source [nitrogen `anhydrous air] supporting the use of gas source The control valve is open-closed so that when a leak or even a fire occurs in a pipe or tank, the fusible alloy melts quickly by solenoid valve or by manually depressurizing the gas source or high temperature ≥75 %% p5C %% D while the cylinder is automatically Pressure relief, the valve quickly closed and only leakage, play a safety role. Widely used in chemical dangerous goods pipeline, gas pipe network system, gas thermal plant, gas boiler room and residential facilities. Shut-off valve is the product features: Shut-off valve belongs to the automation system, a valve actuator, the multi-spring pneumatic actuator film or floating piston actuator and control valve composition, the receiver to adjust the instrument signal to control the process of pipe fluid cut off , Connected or switched. Has a simple structure, responsive, reliable and so on. Can be widely used in petroleum, chemical, metallurgical and other industrial sectors. Pneumatic emergency shut-off valve gas source requires filtered compressed air, the medium flowing through the valve body should be free of impurities and no particles of liquid and gas. Shut-off valve product performance specifications: Pressure grade: 2.5 / 4.0Mpa Cylinder working pressure: ≤2.0Mpa Operating temperature: -40 ~ +80 ℃ Cylinder use of media: nitrogen `anhydrous air Medium used: natural gas, liquefied petroleum gas, liquid ammonia Fusing time: ± 70 ℃ Closing time: ≤ 5 seconds cylinder opening pressure; ≥ 0.3-0 .6 Mpa Body material: cast just, stainless steel. 304,316,316 L Spring: 50CrVA (spring steel) Cylinder, Piston: Ductile iron O-ring: Teflon, NBR Type of normally open, normally closed shut-off valve Precautions for storage and use: 1, custody When the valve of the various external access closed with a plug or cover, stored in a dry and ventilated room, long-term storage should be checked regularly to eliminate dirt and rust-proof oil on the processing surface coated with rust. 2, the valve should be cleaned before installation, tighten the screw connections. 3, liquid ammonia emergency cut-off valve using the principle of check valve, can only want to cut off, the installation must pay attention to the valve logo, the valve will be the protection of the entrance. Valve installation direction; high and low out. 4, the product must be marked flange sealing surface form, pressure rating and connection standards.
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