Hydraulic Clamping Fundamentals

Pneumatic power supply is a pump that is driven by an air motor to create hydraulic fluid flow and pressure.

Hydraulic (oil / oil) intensifier is a reciprocating device that multiplies the incoming pressure in a hydraulic system.

All VektorFlo® air pumps utilize an internal reciprocating check valve design to build pressure. When the hydraulic flow is unrestricted, the pump will supply a consistent flow of hydraulic fluid based on the speed of the internal air motor, which is dependent on the volume of the incoming air supply. As the hydraulic flow in the system becomes restricted (pressure increases), the pump cycle rate will decrease, until the hydraulic flow is completely restricted and the air motor stalls. If flow is again established (i.e. a leak in the hydraulic system, or the actuation of a directional control valve) allowing pressure to decrease below stall point of the air motor, the pump will re-start and rebuild pressure. Screw pump is a pump that creates flow by rotating a screw that pushes against the piston of a hydraulic cylinder.

While its output flow is dependent on the incoming flow rate, the output flow will be reduced to allow for the system pressure intensification. The excess fluid flow is returned to the reservoir via the “R” line until the intensified pressure is reached, at which time, it will “stall” out and stop pumping. Air / oil booster is a device that creates hydraulic flow by linear actuation of a larger air cylinder driving a smaller hydraulic piston.

This device will generate flow, as well as pressure intensification due to the difference in area of the pneumatic / hydraulic piston areas. This type of booster does not reciprocate, and therefore has a finite useable volume. Its primary function is to drive single acting devices. A directional control valve is a device that directs the movement of fluid flow in a system. They may be operated manually, electrically, pneumatically, or hydraulically. VALVES

The rotation of the screw is usually manually rotated by hand with a wrench. As this type of pump typically has a very limited volumetric capacity and flow, it is best suited for applications powering a small quantity of actuators, requiring a very small amount of oil volume.

Hydraulic Clamping Fundamentals Aug 09 Rev - D

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