1. Gas booster pump: gas part
This part consists of a light reducing piston with an O-ring and a sleeve with an outer layer of glass fiber winding or duralumin coating and filled with epoxy resin in the middle. The piston is placed in the sleeve. The diameter of the air piston is constant for any series of pneumatic pumps.
When the compressed air enters the pneumatic device, the piston is forced to enter the compression stroke, and then the air drives the piston to return for the suction stroke (except for M series pumps with automatic spring return function). Different from other pumps, the pipeline of pneumatic device does not need lubricant because of its inherent low friction and lubrication during assembly.
2. Gas liquid booster pump: hydraulic part
The piston / punch rod of the hydraulic device is directly connected with the piston, and its lower end is installed into the hydraulic device housing. Its diameter determines the compression ratio of the pump, so as to determine the output flow and maximum pressure. Its role is through the inlet control valve will be liquid suction, and in high pressure through the outlet control valve to make it flow out. The device is equipped with spring check valve, which is used to control the liquid inlet and outlet channel. When the piston / plunger of the hydraulic unit is on the suction stroke, the inlet control valve opens,
When the outlet control valve is kept closed by a spring, the liquid is introduced into the pump.
During the boost stroke, the inlet control valve is closed and the piston / plunger of the hydraulic unit forces the liquid to flow out through the outlet control valve. The dynamic seal ring is located around the piston / ram of the hydraulic unit and is a nearly wear-free part. Its function is to be able to hold the liquid under pressure during the cycle and prevent external leakage or infiltration into the gas device. Different sealing materials and forms are selected according to the medium, temperature and pressurization ratio of the pumped liquid. Note: most pumps use a spacer between the pneumatic and hydraulic parts to separate them completely and operate without contamination.