One person cheers for the graduate school entrance examination
Liquid ammonia emergency shut-off valve product description:
The liquid ammonia emergency shut-off valve has good performance, low load loss and reliability, and is installed on liquid ammonia, liquefied petroleum gas, gas or gas pipelines, and is used in conjunction with long-distance gas sources (nitrogen, anhydrous air). The shut-off valve uses the air source to control the valve to open and close, so that when a leak occurs on the pipeline or storage tank, the air source is quickly depressurized through the solenoid valve or manually, and the cylinder is automatically depressurized, and the valve is quickly closed to stop the leakage and play a protective role. Liquid ammonia emergency shut-off valves are widely used in chemical dangerous goods pipelines, gas supply pipeline network systems, gas thermal energy factory workshops, gas boiler rooms and residential facilities.
Liquid ammonia emergency shut-off valve product structure:
Liquid ammonia emergency shut-off valve uses air source (compressed air, nitrogen) and solenoid valve to control the opening and closing of the valve, and is widely used in the inlet and outlet and pipeline of gas, ammonia or weakly corrosive gas storage tanks.
Type: Normally closed, normally open, manual with pneumatic.
The inner structure of the liquid ammonia emergency shut-off valve is equipped with a plug with a low melting point (fusible alloy), which can quickly close the entrance and exit of the storage tank due to the increase in temperature and easy to melt and relieve pressure in the event of an accident to ensure the liquefied petroleum storage system. The cylinder opening pressure is 03-0.6MPa, the daily working pressure of the cylinder, shall not be less than 04MPa to ensure the normal operation of the valve.
Liquid ammonia emergency shut-off valve performance specification:
Pressure Rating: 16/4.0mpa
Cylinder working pressure: 20mpa
Operating temperature: -40 +80
Cylinder using medium: nitrogen, anhydrous air.
Medium: Natural gas, liquefied gas, liquid ammonia, gas.
Melting time: 70
Closing time: 5 seconds.
Cylinder closing pressure: 04-0.8mpa
Body: cast, stainless steel. 304,316,316l
Spring: 50crva (spring steel).
Cylinders, pistons: ductile iron.
Sealing rings, O-rings: PTFE, nitrile rubber.
Liquid ammonia emergency shut-off valve product function:
The liquid ammonia emergency shut-off valve is composed of a multi-spring pneumatic membrane actuator or a floating piston actuator and a regulating valve, which can receive the signal of the regulating instrument and control the shut-off, connection or switching of the fluid in the process pipeline. The valve is in a normally closed state in daily work, and the solenoid valve coil is in a power-off state and does not consume electrical energy. When required for work, the coil is energized, 03-0.6MPa air source (compressed air, nitrogen) to open the valve, otherwise, power off and close. The internal structure of the shut-off valve is placed to melt when the outside temperature rises to 80, blocking the air pipe, and the valve is closed with pressure relief to play a protective role.