The Characteristics of HYDRAULIC VANE PUMP

Over the past twenty years, the application of hydraulics in agricultural, construction and materials handling vehicles and machineries has seen a dramatic rise. In fact, virtually all modern vehicles and machines use fluid power, and new vehicles and markets are appearing as fast as the development of new products and concepts will allow.

Vehicle size and work capacity are growing. Today’s front-end loaders, for example, have bucket capacities equal to the capacities of scrapers of just a few years ago. To provide equipment with still larger load capacities, and increased speed to do the job faster, the trend is toward high-speed, high-pressure hydraulic pumps and motors that allow system components to remain relatively small.

To meet the ever increasing demands for fast positive action, longer service life and economical vehicle operation, Keidyrt offers you the large selection of top-quality, precision-built hydraulic pumps .

You can always depend on Keister for the advanced hydraulic products and the best in customer service. Keister has the facilities and skilled personnel to give you prompt deliveries, volume production, and application and service assistance when you need it.

Pump Characteristics

Maximum Speed

Maximum rated pump speeds are based on one atmosphere of inlet pressure (14.7 psia) with the pump at sea level and operating with SAE 10W oil at 38_ to 82_ C (100_ to 180_ F), unless otherwise specified.

Minimum Speed

Minimum recommended starting
speed, under fluid conditions stated above, is generally 600 r/min.
However, the pump size, system characteristics and environmental conditions can raise or lower this speed. A lower speed can often be achieved after the pump has primed.

If low starting or operating speeds are required, consult your Vickers representative.

Inlet Pressure

Recommended inlet pressure is
0 to 0,34 bar (0 to 5 psi) gauge.
Inlet pressure should not exceed 1,38 bar (20 psi). Inlet depressions should not exceed 0,17 bar (5” of Hg or 12.2 psia).

Rated Pressure

Pumps should not be operated at or near rated pressures at idle speeds for extended periods. Localized overheating and damage can result.

Never assume pumps in a double, triple or thru-drive pump assembly can be simultaneously loaded to rated pressure. Shaft loading must be checked for excessive torque and side loads.

Pump Supercharge Pressure

A pressurized reservoir system does not always assure a positive(supercharge) pressure at the pump inlet. Vacuum at the pump inlet can result during

cold start-ups. Avoid high speeds until the circuit has warmed and supercharge pressure actually exists at the pump inlet. When vacuum breaker
pressure caps are used on the reservoir, exercise implements to obtain reservoir precharge.

For more information and technical support, please do not hesitate to contact us through our website: https://www.zjkeister.com/.