Precision pressure reducing valve is a necessary part of the pneumatic control valve, the main function is to reduce the pressure of the air source and stabilize to a fixed value, in order to facilitate the control valve can obtain a stable air source power for regulating control.
According to the structure can be divided into diaphragm type, spring film type, piston type, lever type and bellows type; According to the number of seat can be single seat type and double seat type; According to the different position of the disc can be divided into positive and reaction type
The operation of precision pressure reducing valve is controlled by the pressure behind the valve. When the pressure sensor detects that the valve pressure indication rises, the reducing valve valve opening decreases; When the pressure of the reducing valve is detected, the opening of the reducing valve increases to meet the control requirements.
Precision pressure reducing valves -- The valve's pressure reduction ratio must be somewhat higher than the system value; It should be able to respond to positive or negative control signals even at maximum or minimum flow. These valves should be selected for the useful control range, i.e., 20% to 80% of the maximum flow rate. Normal is proportional or has proportional characteristics. These types of valves themselves have optimal flow characteristics and flow ranges required for proportional control.