Pressure Control Valves

UPCV10-F41 — Pressure Unloading Valve
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UPCV10-F41 Valve

UPCV10-F41 Valve symbol
A screw-in, cartridge-style, remote sequence, piloted unloading valve with an
integrated check valve, intended for accumulator type hydraulic systems.

In its steady state, the UPCV10-F41 blocks flow from ports 3 to 4 and allows flow from
ports 1 to 2. On attainment of a pre-determined pressure at ports 2 and 3, the spool shifts
to allow free flow from ports 3 to 4, unloading the port 3 pilot flow. The spring chamber is
vented to port 4. If pressure at port 2 drops to a level below the ratio established reload value,
the valve will close, blocking flow from ports 3 to 4.

• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Industry-common size.

Operating Pressure: 344 bar (5000 psi) at ports 1, 2 and 3;
   207 bar (3000 psi) at port 4

Proof Pressure: 758.4 bar (11000 psi)
Burst Pressure: 1516.8 bar (22000 psi)
Flow: 45.4 lpm (12 gpm) port 1 to 2; 1.89 lpm (0.5 gpm) port 3 to 4
Pressure Setting Range: 34.5 to 207 bar (500 to 3000 psi)
Loading and Unloading Ratios: 60% ±5%, 70% ±5%, 80% ±5%, 90% ±5%
Temperature: -40 to 100°C (-40 to 212°F) with Buna seals;
   -26 to 204°C (-15 to 400°F) with fluorocarbon seals
   -54 to 107°C (-65 to 225°F) with polyurethane seals;
   -54 to 107°C (-65 to 225°F) with standard urethane 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: HVC10-F4; See page 9.110_4w
Cavity Tool: HCT10-F4XX; See page 8.600.1
Seal Kit: SK10-F4X-BMM; SK10-F4X-B00 (urethane seals); See page 8.650.1




UPCV10-F41 Flow Pressure



UPCV10-F41 Dimensions



Cartridge: Weight: 0.28 kg. (0.61 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces. Buna N
O-rings and polyester elastomer back-ups



UPCV10-F41 Ordering Chart Manual Override Options