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Pilot Operated Check Valve

ROEMHELD C 2.9511 Pilot-Operated Check Valve with/without Pilot Control

  • Connections: G1/4 - G 1/2
  • Control port: G 1/4
  • Control volume: 0.15 - 0.4 cm³
  • Maximum flow rate: 15 - 55 l/min

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Part Number Material Number Type Max. Flow Rate Max. Operating Pressure (bar) Price Add to Parts List
2951-417 2951-417 without Pilot Control 15 l/min 500 £194.02
£232.82 Inc. VAT
2951-501 2951-501 without Pilot Control 55 l/min 500 £221.09
£265.30 Inc. VAT
2951-421 2951-421 with Pilot Control 55 l/min 500 £270.72
£324.86 Inc. VAT
C29511

Pilot Operated Check Valve - ROEMHELD C 2.9511

  • Connections: G1/4 - G 1/2
  • Control port: G 1/4
  • Control volume: 0.15 - 0.4 cm³
  • Max. flow rate: 15 - 55 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 pressurizing 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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