The ammonia hydraulic shut-off valve is a new type of dangerous goods safety protection valve. It is mainly used to quickly close the inlet and outlet of the storage tank at a remote location in an emergency, and is installed on the pipeline related to liquefied gas, liquid ammonia and natural gas. Used in conjunction with the remote hand pump (model SB03-175), the hydraulic control valve is opened-closed to quickly relieve the pressure of the hand pump or high temperature when a large amount of leakage or even fire occurs on the pipe or tank. The molten alloy is melted, and the valve cylinder is automatically relieved of pressure, and the valve is quickly closed to stop leakage, thereby providing a safety protection function.
The working principle of ammonia gas hydraulic shut-off valve:
In the case of multiple emergency shut-off valves installed in the pipeline, two hand-operated oil pumps should be used for control. One of the oil pumps works for the other oil pump to prevent the oil pump from being damaged. The valve cannot be operated normally. Each emergency shut-off valve uses one ( J23H-40P) Needle valve control.
Main performance specifications for ammonia shut-off valves:
Pressure rating: 20K4.0MPa
Cylinder working pressure: ≤6.0.Mpa
Operating temperature: -40~+80°C
Medium for cylinder: mixing spindle oil. transformer oil
Use medium: natural gas, liquefied gas, liquid ammonia, gas
Melting time: ±70°C
Closing time: ≤10 seconds
Cylinder opening pressure: ≥2.0MPa
Body material: carbon steel WCB stainless steel 304.316.316L
Cylinder, piston chrome stainless steel
Sealing ring, O-ring: PTFE, nitrile rubber
Spring 50CrVA (spring steel)
Type: Normally closed
Precautions for installation and use of ammonia hydraulic shut-off valve:
1. When storing, close the external passages of the valve with a plug or cover, store in a dry and ventilated room, check for long-term storage, eliminate dirt, and apply anti-rust oil on the processing surface to prevent corrosion.
2 Clean the valve before installation and tighten the threaded joints.
3, ammonia gas hydraulic shut-off valve using the check valve principle, can only want to cut off, the installation must pay attention to the valve mark, the end to be protected as the valve inlet. When installing the valve, please pay attention: high input and low output.