Hydraulic Clamping Fundamentals

HYDRAULIC POWER SUPPLIES A hydraulic power supply is an assembly consisting of a pump that has been configured in such a way as to have the majority, if not all of the ancillary components necessary to power and control a pump as a pre-configured package. Hydraulic pump is a device used to create flow of a liquid in a hydraulic circuit. The ability of a pump to produce flow against a resistance is directly related to it’s available input power. It may be driven by electrically, pneumatically, hydraulically, or even manually. devices, as it will effect the spring’s ability to push the hydraulic fluid from an actuator back through the system, allowing the them to return to their relaxed state. amount of time. In power clamping applications, flow rate is commonly designated as either gallons per minute (gpm) or cubic inches per minute (cim) Valve is a device that directs the flow, or operating condition of circuit. Some of the valve types often found in power clamping is; directional control, sequence, check, pressure reducing, pressure limiting, shut off, and flow control. Orifice is a restriction in a hydraulic line or component to help reduce the flow rate, or create a pressure differential (inlet pressure minus the outlet pressure). Back pressure is the resistance to flow generated by the devices and the piping in a hydraulic system. This is most often of concern, but not limited to, systems using single acting (spring returned) In an effort to simplify implementation of a hydraulic clamping system, the VektorFlo® product line offers a variety of pre-configured power supplies that have been designed to provide optimum functionality for most power clamping applications. Please refer to your

VektorFlo® catalog for specific details about our power supply offerings and specifications.

Electric power supply is a pump that is driven by an electric motor to create flow.

To date, all VektorFlo® electric pumps are of a two-stage flow design. The first stage generates a relatively high flow rate (130 – 350 in3/min) of hydraulic fluid at a relatively low (400-800 psi) pressure. This higher flow rate allows the clamping components to be moved into position relatively quickly. As the resistance to flow in the system increases, the internal high-pressure second stage automatically engages. This second stage operates at a reduced flow rate (13 – 50 in3/min) to increase the system to high pressure. This allows the use of a smaller electric motor to achieve more work. The pump contains an internal pressure relief valve that directs the excess internal flow of hydraulic fluid back to tank, to prevent it from stalling the electric motor when flow is fully restricted as well as lubricate internal moving components. The motor is controlled by a pressure switch, which will close when a pre-set pressure has been reached in the system, and shut it off. If pressure in the system should fall below the re-set point of the pressure switch, it will re-open and re-start the electric motor to replenish system pressure.

Hydraulic Clamping Fundamentals Aug 09 Rev - D

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