1. Features: By using the compressed air as the power source, the output liquid pressure and the pressure of the driving air source pressure is in proportionality. By adjusting the pressure of the inlet air source, the corresponding liquid pressure can be obtained. When the air pressure and the liquid pressure balanced, the pneumatic booster pump will stop charging pressure, the output pressure is stable in the pre adjustment of the pressure. It has the characteristics of explosion proof, adjustable output pressure, small volume, light weight, simple operation, reliable performance, wide application range, etc.. It is especially suitable for high-pressure and ultrahigh pressure blasting and pressure testing of valves, pipes, joints, pressure 2 Usage. Applicable range of pressure (bursting) test equipment: Automobile steering tube, brake pipe, air-conditioning pipe, oil pipe, water pipe cooling, radiator, heater hose, hydraulic equipment, condenser, evaporator, air conditioning filter hose, turbocharging system hose, car brake pump, a cylinder body, a project hydraulic hose, air hose and manifold, rigid pipe, joints, valves,cylinder, pressure gauges, pressure sensor,pressure vessel, pressure transmitter etc.