The operation principle of Daqing natural gas regulator is supplied by Ruifeng plant.
The safety of the safety shut-off valve is the top priority in the design of the pressure regulating skid. Among the core equipment of the sled, one of the most important equipment is the safe shutoff valve (also called the emergency safety cutting valve), which is installed in the upstream of the voltage regulator, located at the inlet position of the sled, and in an emergency, after a series of safe operation (or failure), such as the release of the safety valve and the control of the pressure regulator action, the downstream gas still remains. When the overpressure is maintained, the upstream gas is cut off by fast shut-off. It is the last safety barrier to protect the whole station and avoid overpressure caused by the failure of the regulator. Therefore, it must be sensitive, fast cut, high reliability and strong external interference resistance.
Siping gas regulator cut off pressure, run factory is safe and reliable.
At present, there are various types of safety cut-off valves on the market, which are self-contained, pneumatic, electric and so on. The reality is that, if the design documents are not explicitly required, most manufacturers will consider the cost, not safety, reliability, when choosing a safe shutoff valve. For example, in the CNG sled market with high pressure of 20MPa, the price of the imported high pressure self powered safety cut-off valve is higher, and there is no mature high pressure self powered safety cutting valve in China, so the manufacturers mostly choose the cheap domestic pneumatic safety cut-off valve. In the CNG storage station that I visited, it is found that the domestic pneumatic safety cut-off valve often has air leakage, and the nitrogen cylinders that provide the power source are seldom checked regularly and regularly check the residual pressure. Some of the storage stations and even the gas source nitrogen cylinders are not equipped, and the pneumatic safety cut-off valve is set up, once the pressure regulator appears. The risk of failure is conceivable.
Siping gas regulator cut off pressure, run factory is safe and reliable.
The safety cut-off valve on the pressure regulating skid should be chosen by self operated safety cut-off valve. Self powered safety cut-off valve is a safe cutting device that does not rely on external power, such as electric, pneumatic, hydraulic and so on, and only depends on the pressure of the pipe and the energy of the inner spring of the valve. It has the characteristics of fast cutting, high reliability and strong anti-interference ability. There is no risk of misoperation or non action due to potential factors such as blackout, coil aging, and lack of air pressure, and there is no human error risk caused by negligence of operator and no timely replacement or maintenance of power source and power supply. Therefore, the safety cut-off valve should be the first choice for the safety cut-off valve on the pressure sled. If pneumatic or electric safety cut-off valves are selected, the continuous and reliable supply of the power source or power supply must be guaranteed, and the valve must be cut off when the power source or power supply fails.
This puts forward higher requirements for the quality of products and the quality of operators.
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