Compact Motion Control Valves - Load Lowering Control with Relief

VRBC90-VS30-CC-FC2

RE18310-31-01(2023-11-26)
Description

When pressure at V2 rises above the check spring bias pressure, the check seat is pushed open and upstream flow is allowed from V2 to C2. Reverse flow (C2 - V2) is locked, in a leak free mode, by valve (1). Downstream flow (C2 - V2) is possible when C1-V1 pressure rises above the bias pressure of the valve (1) spring. The back-pressure at V2 is directly additive to the spring and tends to close the control plunger: it restricts the flow area and it increases the pressure drop through valve (1). If C1-C1 pressure is limited and kept constant, also back-pressure at V2 will remain constant, and downstream flow (C2 - V2) will stay constant, controlled only by the Main Control Valve opening (V2 to T), independently from the load (C2 pressure). The result is easier and better control during lowering. The leak free pressure relief valve (2) senses C2 pressure and opens under overload or shock conditions. For better safety and compact assembly, the C2 port is gasket mounted directly on the actuator.

Note: port identified with M are not protected with calibrated orifice but in direct connection with pressure channels.

General:
Operating pressure:
  • up to 210 bar (3000 psi)
Max. flow:
  • 90 l/min. (24 gpm)
Weight:
  • 1.5 kg (3.3 lbs)
Manifold material:
  • Note: Note: aluminium bodies are often strong enough for operating pressures exceeding 210 bar (3000 psi), depending from the fatigue life expected in the specific application. If in doubt, consult our Service Network.
  • Anodized aluminium
Flange seal kit 1):
  • E00000000000009 (R930004539)
Fluid:
  • Mineral oil (HL, HLP) according DIN 51524
Fluid temperature range:
  • -30 °C to 100 (-22 to 212 °F)
Viscosity range:
  • 10 to 500 mm2/s (cSt)
Recommended degree of fluid contamination:
  • Class 19/17/14 according to ISO 4406
Other technical data:
  • see data sheet 18350-50
Relief setting: at least 1.3 times the highest expected load.:
  • Note: Note: for applications outside these parameters, please consult us.
¹ Seals for 10 valves:
RE18310-31-02(2023-11-26)
RE18310-31-order(2023-11-26)
RE18310-31-dim(2023-11-26)