SELECTING THE RIGHT PUMP FOR YOUR SPECIFIC NEED

Star Hydraulics builds three types of manually operated pumps - single piston pumps, two-speed pumps, and double-acting pumps. Pumps with 4-way valves are also offered. Your application determines which type of pump to select.

If there is a constantly applied load, such as a cylinder raising a heavy weight, use the single piston pump or the double-acting pump.

If there is initially little or no resistance, but high force is needed later, use the two-speed dual piston pump. An example of this would be a press in which a cylinder advances until it contacts a load and then applies a much greater bending or cutting force. The dual piston pump supplies high volume, low pressure flow until the increased force is needed, at which time it automatically switches to high pressure, lower volume.

If the application calls for a double-acting cylinder, which exerts force in either direction, use a pump with a 4-way valve.

TECHNICAL DATA:

Light hydraulic oil is recommended for use with Star pumps. Oils with SUS viscosity of 75 to 150 at 100°F will give satisfactory performance (ISO grade 15, 22, or 32). In an emergency situation when above oils are not available, use 5w or 10w motor oil or automatic transmission fluid.

All exposed surfaces of standard pumps are painted with one coat of industrial quality paint. Pumps painted with special colors with two coat finishes, or with prime coat only, and pumps with special plated or polished parts are also available.

In order to provide for continuing product improvement, Star may make design changes that affect the data provided on this web site. Contact the factory for the most current specifications.