ROEMHELD Pilot-Operated Check Valves, C2.9512 (Manifold Mounted)

ROEMHELD Power Workholding

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Product Information

ROEMHELD Pilot-Operated Check Valves, C2.9512 (Manifold Mounted)

7250 psi max

Holds clamping pressure until released by a separate pilot pressure line (allows only one-way flow until released). Can be used as a safety device in case the fluid line to the fixture could become damaged. Can also be used to prevent workpieces from floating between opposing clamps. The version shown here is manifold mounted, to eliminate exposed fluid lines. Also available with standard fittings for mounting with exposed tubing.

Available in one size:

Standard capacity (1200 cu.in./min flow rate)

Documents

C2.9512

Data Sheet

Operation

Flow from B –> A is free flow. Return flow from A –> B is locked until hydraulically unlocked by pressurizing the control port Z. Port L is for a leakage line.

Design Considerations

Pilot-Operated Check Valves are not suitable for locking double-acting swing clamps (pull-type cylinders). Due to the unfavorable surface-area ratio of these elements, the control pressure is not sufficient for unlocking and dangerous pressure intensification can occur.

Mounting & Fluid Supply

Fluid enters and exits through four O-ring ports fed by drilled fixture passages. For manifold mounting, the mounting surface must be ground flat to ensure proper O-ring sealing (32 RMS max). Fasten with four #8 or M4 cap screws. Mount in any position, horizontal or vertical. Do not use NPT fittings.