Cartridge Valves - Load Holding Valves - Pilot to open check

VSON-12U

RE18319-40-01(2023-11-01)
Description

When pressure at 2 rises above the spring bias pressure, the poppet is pushed from its seat and flow is allowed from 2 to 1. The valve is normally closed (checked) from 1 to 2. When sufficient pilot pressure is present at port 3, the pilot piston acts to push the poppet from its seat and flow is allowed from 1 to 2. Precision machining and hardening processes allow virtually leak-free performance in the checked condition. In case of valve application in redundancy systems it is especially recommended to use version with sealed pilot piston.

¹) Only external seals for 10 valves

General:
Max. operating pressure:
  • 350 bar (5000 psi)
Max. flow:
  • 120 l/min. (32 gpm)
Pilot ratio:
  • 3.2:1
Max. internal leakage:
  • 5 drops/min.
Fluid temperature range:
  • -30 to 100 °C (-22 to 212 °F)
Installation torque:
  • 60 - 70 Nm (44 - 52 ft-lbs)
Weight:
  • 0.25 kg (0.55 lbs)
Cavity:
  • SUN T-2A
Lines bodies and standard assemblies:
  • Please refer to section “Hydraulic integrated circuit” or consult factory
Seal kit¹):
  • Code: RG12U9020110100
  • material no: R930005599
Fluids:
  • Mineral-based or synthetics with lubricating properties at viscosities of 5 to 800 mm²/s (cSt)
Recommended degree of fluid contamination:
  • Nominal value max. 10µm (NAS 8) / ISO 4406 20/18/15
Installation position:
  • No restrictions
Other Technical Data:
  • See data sheet 18350-50
RE18319-40-02(2023-11-01)
RE18319-40-order(2023-11-01)
RE18319-40-dim(2023-11-01)