SHINEEAST Company has more than ten years of hydraulic and pneumatic engineering experience in the design and manufacture of air driven liquid pumps. Continuous investment in new machinery and advanced technology imported keeps SHINEEAST at the forefront of the field. SHINEEAST pumps are air driven at a drive air pressure of 2 to 10bar (29 to145 psi). However, we advise the pressure within 8bar for service life of the pumps. Basically the principle of operation is similar to a reciprocating amplifier where control of the piston at the end position is regulated by a pilot operated 4/2 way valve.SHINEEAST pumps feature a large air piston joint to a smaller diameter plunger. The pressure ratio is the difference of these two areas and is the method of determing maximum outlet pressure. Higher pressureis obtained by using higher pressure ratio. SHINEEAST model numbers reflect the pumps nominal pressure ratio, while the technical data indicates exact ratios. The outlet pressure is easily to set through a simple air regulator. By multiplying the pressure ratio by the available shop air pressure, the nominal liquid pressure can be calculated.