Compact Motion Control Valves - Counterbalance Valves - Single acting with brake release port

VBSO-SE-FA-33

RE18308-39-01(2023-10-25)
Description

When pressure at V2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from V2 to C2. When load pressure at C2 rises above the pressure setting, the direct operated, differential area, relief function is activated and flow is relieved from C2 to V2. With pilot pressure at C5, the pressure setting is reduced in proportion to the stated ratio of the valve, until opening and allowing flow from C2 to V2. The spring chamber is drained to V2, and any back-pressure at V2 is additive to the pressure setting in all functions. Through port C3, an incorporated shuttle valve directs either V1 or V2 line pressure to the spring actuated brake for brake opening.

General:
Operating pressure:
  • up to 210 bar (3000 psi)
Max. flow:
  • 170 l/min. (45 gpm)
Flangeable on REXROTH motors A2FE 45-56-63 series.:
Relief setting: at least 1.3 times the highest expected load. In addition, both the relief setting and the pilot ratio must be determined also in order to achieve building-up of pilot pressure in V1 high enough to release the brake prior to any valve opening from C2 to V2.:
Weight:
  • 2.9 kg (6.3 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):
  • E00000000000059 (R930060589)
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:
  • Note: Note: for applications outside these parameters, please consult us.
  • Note: ¹) Seals for 10 valves
  • see data sheet 18350-50
RE18308-39-02(2023-10-25)
RE18308-39-order(2023-10-25)
RE18308-39-dim(2023-10-25)