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Divided into direct type gas regulator and command gas regulator
Direct type gas regulator
Suitable for gas regulation precision of *0% to *0% of the system. Direct action type gas regulator is suitable for the industrial, utility, gas supply, 
instrument air supply and all kinds of gas supply, gas supply, boiler, steam pressure control system and the nitrogen tank sealing system. Direct action type gas 
regulator of the biggest advantages is the design, structure and the operation is simple. However, due to the spring load system pressure drop is caused in the running 
gas regulator, led to the outlet pressure of the nonlinear. (pressure drop is defined by the low load changes, the controlled pressure lower. Is often described as 
a percentage, it affects the gas regulator gas regulation accuracy.) Therefore, in order to win at the low pressure drop heavy traffic, have to choose another 
type of gas regulator.
The command type gas regulator
Applicable to the outlet pressure range is less than *0% of set pressure in the system. In addition to the same as the direct action type gas regulator application 
characteristics, and it can meet the requirements of a larger flow rate and higher precision. This type of gas regulator and direct action type gas regulator 
to do the same work. But it is not dependent on open the main valve spring force, but by the command editor provides the load pressure acting on the pressure regulator 
valve film up and open the main valve. Command (also called relay, amplifier or multiplier) amplify the pressure change of downstream smaller and as the pressure in 
the load on the pressure regulator. It is this amplification effect to ensure the command organ function type gas regulator can accurate control pressure. Almost 
all of the command role type gas regulator.