The MP-Intensifiers have a limitation to the maximum permissible flow supplied to the inlet of the intensifier, which depends on the model and intensification choosen. However all MP-Intensifiers can be used in high flow applications if the flow supplied to the intensifier is limited accordingly. The ciruit below shows how to install the intensifier in a high flow system. The flow to the intensifier is limited by flow restrictors, and parallel with the intensifier a pilot operated check valve is installed. This p.o. check valve is designed to take the full flow and pressure. At the sequence start the full flow from the pump is delivered through the p.o. check valve to the cylinder. When pump pressure has been build up in the cylinder, the MP-intensifier will automatically increase the pressure as required. This setup is also used in the reverse setup, where high pressure is required to initiate the movement of a cylinder, e.g. in core pulling in a plastic injection moulding machine.
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Scanwill Fluid Power ApS |
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In some applications it is necessary to shut off the pump either to preserve energy to prevent heat build up or because the application is moved (e.g. pallets for machine tools). In these situations it is adviseable to insert a leak proof pilot operated check valve after the intensifier, as the integrated check valves in the intensifiers are not designed to be leak proof in these situations.