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    Pallet Decouplers (Automatic Shutoff)

    Pallet Decouplers (Automatic Shutoff)

    Power Workholding

    7250 psi max
    For Single-Acting or Double-Acting Systems
    Allows disconnecting a fixture from its power source before machining. Ideal for pallets and rotating fixtures where a fluid feed line is impractical. The automatic-shutoff version shown here (with two hose connections) can be used for single-acting or double-acting systems. Can also be used when several individual clamping valves are mounted on the fixture, which requires a return line. Automatic shutoff is achieved using a Pilot-Operated Check Valve, with no manual Shutoff Valve required. Pallet Decoupler includes Pilot-Operated Check Valve, two male Quick Disconnects, Accumulator, Pressure Gauge, and Pressure-Relief Valve. This compact assembly fits easily on almost any fixture. Choice of two Accumulator sizes, compact or large. This Pallet Decoupler requires one of the specifically configured Electric Power Units listed below.

    Operation

    Single-Acting or Double-Acting Fixture:
    1. Remove protective caps from male Quick Disconnects on decoupler. Clean coupling components if necessary.
    2. Connect double coupler, with both hydraulic hoses attached, to the Pallet Decoupler. The power unit should be depressurized, with the selector switch in "couple" position, before connection.
    3. Turn selector switch to "unclamp" position.
    4. After unloading and reloading the fixture, turn selector switch to "clamp" position.
    5. After pressure gauge shows proper clamping pressure, turn selector switch to "couple" position.
    6. Disconnect double coupler and replace protective caps on male Quick Disconnects. Double coupler can be connected to the optional safety support while not in use.

    Fixture with Several Individual Clamping Valves:

    1. Remove protective caps from male Quick Disconnects on decoupler. Clean coupling components if necessary.
    2. Connect double coupler, with both hydraulic hoses attached, to the Pallet Decoupler (one pressure line and one return-to-reservoir line). The power unit should be in "unclamped" mode (depressurized) before connection.
    3. Push power-unit control button to "clamp". The individual clamping valves on the fixture are now operational.
    4. Operate individual clamping valves on the fixture independently to remove finished parts and reload.
    5. After all new workpieces are clamped, push power-unit control button to "unclamp".
    6. Disconnect double coupler and replace protective caps on male Quick Disconnects. Double coupler can be connected to the optional safety support while not in use.

    Power Unit

    An Electric Power Unit with special controls is required for automatic-shutoff Pallet Decouplers. This power unit's control box has a selector switch with three positions: "unclamped", "clamped", and "couple", along with a green signal lamp that lights in "clamped" position. Two solenoid-operated clamping valves provide one clamping-pressure port "A" and one unclamping-pressure port "B" (the same power unit and Pallet Decoupler can be used for either single-acting or double-acting systems). Please note: if clamping is controlled by individual clamping valves mounted on the fixture, with port "B" used as a depressurized return line, then no special power unit is required. In this application, one constant-pressure hose and one return hose are connected to the decoupler, so even a simple single-acting power unit can be used.

    Design Considerations & Safety Precautions

    Use Pallet Decouplers only with Roemheld power-workholding components, because all components must have zero leakage. The decoupler's Accumulator compensates for pressure variations due to temperature changes. This decoupler is equipped with a Pressure-Relief Valve to protect the fixture and Accumulator from extreme temperature increases.

    Mounting

    Fasten to fixture with two 1/4" or M6 socket-head cap screws. Mount in any position, horizontal or vertical. 1/4" BSPP port. Do not use NPT fittings.

    Optional Safety Support

    We offer an optional safety support that should be mounted a convenient distance away from the machining fixture. This support has a dummy connections for the Female Disconnect Double Coupler, for use after the hydraulic hoses are disconnected from the Pallet Decoupler. An integral limit switch ensures that the fixture can be moved only if the double coupler has been correctly removed from the Pallet Decoupler and attached to the safety support.

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    COUPLING UNIT, COMPLETE, FOR D.A. CYLINDERS, NOMINAL VOLUME 13 cm³, GAS-PRELOAD PRESSURE 100 bar, Max. 400 bar CL-CLR-9425-022-PD

    SKU: CL-CLR-9425-022-PD
    MPN: CLR-9425-022-PD
    Email Sales for Pricing
    Allows disconnecting a fixture from its power source before machining. Ideal for pallets and rotating fixtures where a fluid feed line is impractical. The automatic-shutoff version shown here (with two hose connections) can be used for single-acting or double-acting systems. Can also be used when several individual clamping valves are mounted on the fixture, which requires a return line. Automatic shutoff is achieved using a Pilot-Operated Check Valve, with no manual Shutoff Valve required. Pallet Decoupler includes Pilot-Operated Check Valve, two male Quick Disconnects, Accumulator, Pressure Gauge, and Pressure-Relief Valve. This compact assembly fits easily on almost any fixture.

    COUPLING UNIT, COMPLETE, FOR D.A. CYLINDERS, NOMINAL VOLUME 75 cm³, GAS-PRELOAD PRESSURE 100 bar, Max. 500 bar CL-CLR-9425-021-PD

    SKU: CL-CLR-9425-021-PD
    MPN: CLR-9425-021-PD
    Email Sales for Pricing
    Allows disconnecting a fixture from its power source before machining. Ideal for pallets and rotating fixtures where a fluid feed line is impractical. The automatic-shutoff version shown here (with two hose connections) can be used for single-acting or double-acting systems. Can also be used when several individual clamping valves are mounted on the fixture, which requires a return line. Automatic shutoff is achieved using a Pilot-Operated Check Valve, with no manual Shutoff Valve required. Pallet Decoupler includes Pilot-Operated Check Valve, two male Quick Disconnects, Accumulator, Pressure Gauge, and Pressure-Relief Valve. This compact assembly fits easily on almost any fixture.

    FEMALE DISCONNECT DOUBLE COUPLER REPLACES CLR-9425-101-PDA CL-CLR-9425-102-PDA

    SKU: CL-CLR-9425-102-PDA
    MPN: CLR-9425-102-PDA
    Email Sales for Pricing
    Allows disconnecting a fixture from its power source before machining. Ideal for pallets and rotating fixtures where a fluid feed line is impractical. The automatic-shutoff version shown here (with two hose connections) can be used for single-acting or double-acting systems. Can also be used when several individual clamping valves are mounted on the fixture, which requires a return line. Automatic shutoff is achieved using a Pilot-Operated Check Valve, with no manual Shutoff Valve required. Pallet Decoupler includes Pilot-Operated Check Valve, two male Quick Disconnects, Accumulator, Pressure Gauge, and Pressure-Relief Valve. This compact assembly fits easily on almost any fixture.

    SAFETY SUPPORT FOR D.A. CYLINDER, 500 bar CL-CLR-0942-002-PDA

    SKU: CL-CLR-0942-002-PDA
    MPN: CLR-0942-002-PDA
    Email Sales for Pricing
    Allows disconnecting a fixture from its power source before machining. Ideal for pallets and rotating fixtures where a fluid feed line is impractical. The automatic-shutoff version shown here (with two hose connections) can be used for single-acting or double-acting systems. Can also be used when several individual clamping valves are mounted on the fixture, which requires a return line. Automatic shutoff is achieved using a Pilot-Operated Check Valve, with no manual Shutoff Valve required. Pallet Decoupler includes Pilot-Operated Check Valve, two male Quick Disconnects, Accumulator, Pressure Gauge, and Pressure-Relief Valve. This compact assembly fits easily on almost any fixture.

    Pallet Decouplers (Automatic Shutoff)