These pumps are ground and have hard chrome plated pistons. The adjustable overload will be set at the maximum pressure at the factory unless a lower pressure is specified by the customer. The overload can be adjusted by the customer in the field if required. These pumps come without adjustable overload valve and without manual pressure relief valve. These pumps are used in equipment that has it's own reservoir and control valves. Or a system designer must provide overload relief protection for the system if overload relief is required. These pumps provide a low cost efficient means for manually developing or increasing pressure in a hydraulic system. In emergencies they furnish reliable hydraulic power to operate presses, valves, doors, safety locks, and other devices.
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