pneumatic hydraulic pump high pressure made in china

Pistons with O-ring seals operate in, fiberglass wrapped cylinders. The cylinder diameter is constant for a particular pump series. The driving medium pushes the piston down on the compression stroke and lifts it on the suction stroke (the M series has a spring return). No drive air lubricant is required as the piston is pre-lubricated during assembly.

In the hydraulic section, the drive piston connects to the hydraulic plunger/piston. Hydraulic pistons have different sizes depending on their nominal ratio. The higher ratio pumps can achieve higher pressures, but have smaller displacements, which translates to less flow per stroke.

During the down stroke, the inlet check valve keeps the liquid in the pump from flowing back into the suction line while it is compressed by the plunger. On the return or suction stroke, fresh liquid is drawn in through the inlet check valve, while the outlet check valve closes.

These check valves control the flow of liquid through the hydraulic section. They are spring-loaded and have a very low cracking pressure, which allows maximum flow during suction. Inlet check valves are closed by the hydraulic fluid pressure on downstrokes. At the same time, the outlet check valves open when the hydraulic pressure in the pump exceeds the pressure in the system after the pump.

This is a pilot operated, unbalanced lightweight spool that cycles the driving pressure first to the top of the driving piston and then to the bottom to cycle the piston. It is actuated through control valves at the beginning and end of stroke, causing the spool to move out of balance and the piston to move up and down.

A hydraulic seal is one of the few parts that wear out. Basically, it prevents fluid from flowing into the actuator while the hydraulic piston is moving back and forth. Seal specifications are determined by the fluid, its pressure and temperature. Most Haskel pumps can be operated without contamination by use of a vent or distance piece between the pump section and the air drive.

HS721 Calibration pneumatic hand pump consists of hand pump, lead screw , reverse valve, relieve valve, and output interface . It could supply the pressure for the calibrating pressure (differential pressure) transmitters,precision pressure gauges ,general pressure gauges and other pressure instruments. Functions HS721 Calibration pneumatic hand pump provides pressure for calibrating pressure gauges, as pressure (different pressure) transmitters, precision pressure gauges, general pressure gauges and other pressure instruments.

HPU-225 pneumatic hydraulic high pressure pump is a new type of hydraulic stretching and pressing process equipment. It converts the lower air pressure into pressure oil and becomes an ideal power source.

HPU-225 pneumatic hydraulic high pressure pump has the advantages of high output pressure, simple operation, safety and reliability, convenient carrying and so on. It can be widely used for fastening large and medium-sized mechanical screws and keyless matching of large transmission parts and structural parts in manufacturing industries such as metallurgy, mining, petrochemical industry, shipbuilding industry, locomotive and rolling stock. It is time-saving, labor-saving, uniform force distribution and reliable sealing. It is an ideal tool for the assembly and matching of various large and medium-sized machinery

Special oil tank cover design to make the oil tank has the good sealing property or air permeability, that can make air pressure keep balance inside and outside of the oil tank.