The four-dimensional air booster valve is a kind of  piston booster valve with compressed air as the  power source. the spool of the booster air control  valve is switched back and forth when the air is  intake to control the pressurization. The valve  piston reciprocates at a very fast speed. With the  increase of the output pressure, the reciprocating  speed of the piston slows down until it stops. At  this time, the output pressure of the booster  valve. Constant, the energy consumption is the  lowest, and the components stop working; no matter  what causes the pressure drop in the pressure  holding circuit, the booster valve will start  automatically to supplement the leakage pressure  and keep the loop pressure constant.