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Pilot Operated Check Valve Manifold Mounting Type

ROEMHELD C 2.9512 Pilot-Operated Check Valve without/with pilot control

  • Maximum operating pressure 500 bar
  • Connecting bore holes: ø5 - ø9 mm
  • Control port: ø3.5 mm
  • Leakage port: ø3.5 mm
  • Control volume: 0.2 - 0.5 cm³
  • Maximum flow rate: 20 - 50 l/min

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Description
Part Number Material Number Type Max. Flow Rate Enquire
2951-419 2951-419 without Pilot Control 50 l/min
2951-416 2951-416 without Pilot Control 20 l/min
2951-420 2951-420 with Pilot Control 50 l/min

Pilot Operated Check Valve Manifold Moutning Type - ROEMHELD C 2.9512

  • Max. operating pressure 500 bar
  • Connecting bore holes: ø5 - ø9 mm
  • Control port: ø3.5 mm
  • Leakage port: ø3.5 mm
  • Control volume: 0.2 - 0.5 cm³
  • Max. flow rate: 20 - 50 l/min

Pilot-operated check valves are spring-loaded poppet valves with free flow from B to A and blocked flow in the opposite direction that can be “unblocked” by pressurising the control port Z. The minimum pressure required for unblocking depends on the height of the counter pressure at port A.

In the version with pre-release first a smaller poppet valve located in the main valve piston is opened.
This offers the following advantages:

  1. The control pressure required for opening is considerably lower, and thereby the use of swing clamps with unfavourable surface ratios is possible.
  2. Pressure reduction is effected relatively softly, that saves all hydraulics components and the noise level sinks.

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