UP10-31 Unloading Pilot, Internal Drain (UP10-31)
A screw-in, cartridge-style, remote sequence, pilot unloading valve, with optional fi xed “unload/reload” pressure ratios for use in accumulator-type hydraulic systems.
Product Operation
In its steady state, the UP10-31 blocks flow from ➁ to ➂. On attainment of a pre-determined pressure at ➀, the spool shifts to allow flow from ➁ to ➂Since the spring chamber is vented at ➂, back pressure at ➂ will directly (1:1) affect the valve’s setting.
If pressure at ➀ drops to a level below the ratio-established reload value, the valve will close, blocking flow from ➁ to ➂
Product Features
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Spring range to 206 bar (3000 psi).
• Hardened spool and cage for long life.
• Industry common cavity.
Product Ratings
Operating Pressure: 207 bar (3000 psi)
Flow: 3.8 lpm (1 gpm)
Ratio Between Unloading & Reloading Pressure: 60% ±5%; 70% ±5%; 80% ±5%
Pressure Setting Range: 69 to 207 bar (1000 to 3000 psi)
Temperature: -40 to 120°C with standard Buna seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC10-3; See page 9.110.1
Cavity Tool: CT10-3XX; See page 8.600.1
Seal Kit: SK10-3X-MM; See page 8.650.1
