UP10-40 Piloted Unloading Valve (UP10-40)
A screw-in, cartridge-style, remote sequence, piloted unloading valve with optional fi xed unload/reload pressure ratios of 60%, 70% or 80%, for use in accumulator-type hydraulic systems.
Product Operation
In its steady state, the UP10-40 blocks flow from ➁ to ➂. On attainment of a pre-determined pressure at ➀, the spool shifts to allow flow from ➁ to ➂. The spring chamber is vented to ➃If 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.• Hardened precision spool and cage for long life.• Industry common cavity.
Product Ratings
Operating Pressure: 206 bar (3000 psi) with staandard Buna N seals
Flow: 3.8 lpm (1 gpm); See Performance Chart
Pressure Setting Range: 69 to 207 bar (1000 to 3000 psi)
Loading and Unloading Ratios: 60% ±5%, 70% ±5%, 80% ±5%
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: VC10-4; See page 9.110.1
Cavity Tool: CT10-4XX; See page 8.600.1
Seal Kit: SK10-4X-MMM; See page 8.650.1
