What are the regulating valves used in the gas industry?

Speaking of gas, I think, basically everyone knows, daily use, is also inseparable from the things! But the gas industry on the use of valves, I want to know that there are not many people? So here to tell you about the gas industry using the classification of valve bar!

1, gas regulator: in the gas transmission and distribution systems, the use of pressure reducing valve is the largest number of such valves in the gas industry known as: gas regulator, it is a self pressure valve. Gas transmission and electricity, high pressure and low pressure, after decompression 3-5 times and finally to the user to use, high pressure in 10MPa-6. 4MPa, users use only about 2kPa-20kPa of pressure, for natural gas, our family cooker, water heater pressure is generally 2kPa. In order to secure the pressure regulating system to avoid the use of electricity, electricity must be explosion-proof cannot but, it is rarely used electric control valve. Production of gas regulators must obtain production licenses, the implementation of the standard is GB16802 "town gas regulator".

2, valve: the valve is a self regulating valve to solve the pressure fluctuation of system pressure in the low pressure system, many applications, structure and the safety valve is similar, but it changes by the rubber film feel pressure to drive the valve opening. There are direct and indirect role in the role of type two, overflow valve valve principle indirectly and hydraulic system of the same, it can spread out part of the gas, in order to ensure the stability of pressure system, it is mainly used in industrial gas furnaces is important, if the gas regulator is damaged, the outlet pressure rises abruptly, at this time, valve start, ensure the normal production of this kiln kiln products, to this product after the shutdown, fault repair gas equipment again. For example, if the glass furnace suddenly cease fire, then even the product with kiln all scrapped, the loss will be enormous.

3, high pressure cut-off valve: it is also a security device, it is connected with a voltage regulator in upstream gas pressure regulator, if open circuit damage, the downstream pressure suddenly increased, the pressure delivered to the super diaphragm cut-off valve, diaphragm driven mechanical trigger mechanism, the overpressure valve cut off, to ensure system safety. It is also a self operated valve. Cut off the trigger structure trigger mechanism and the mousetrap, guns, bow up valve almost, is a kind of structure with 42 dial, triggered at any moment of one thousand pounds, and then transferred to the main valve to shut it down. The cutting accuracy is generally at + 10%, and the accuracy is up to + 1%.