Valves - Pressure Controls - Unloading Valve - Integrated Check

UPCV10-F41

PRESSURE UNLOADING VALVE

Overview

Description

The UPCV10-F41 is a screw in, cartridge style, internally piloted, pilot unloading valve with an internal check valve with fixed reload pressure ratio of 80% for use in accumulator type hydraulic systems

Operation

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

Features

  • Internal check valve
  • Optional fixed reload pressure ratios.
  • Hardened precision spool and cage for long life.
  • Choice of seal options.

Ratings

Pressure Ratings
Pressure rating:
  • 206.8 bar (3000 psi) Port 1
  • 206.8 bar (3000 psi) Port 2
  • 206.8 bar (3000 psi) Port 3
  • 103.4 bar (1500 psi) Port 4
Proof pressure:
  • 482.6 bar (7000 psi)
Burst pressure:
  • 965.3 bar (14000 psi)
Pressure setting:
  • 41.4 to 206.8 bar (600 to 3000 psi)
Loading and unloading pressure ratio:
  • Specified ratio ±5%
Flow Ratings
Flow rating:
  • 0.8 to 7.6 lpm (0.2 to 2 gpm) Port 3 to 4
  • 1.9 lpm (0.5 gpm) Factory recommendation
  • 45.4 lpm (12 gpm) Port 1 to 2
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N 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 urethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per astmb117

Operating Parameters

Fluids:
  • Mineral based or synthetic with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406

Properties

Unit weight:
  • 0.28 kg (0.61 lb)
Internal wetted surface area:
  • 251 cm² (38.9 in²)

Performance

UPCV10-F41_Flow-Pressure

Dimensions

UPCV10-F41_Dim

Materials

Materials

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 standard.

Installation Specifications

Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK10-F4N-BMM Buna N
  • SK10-F4V-BMM Fluorocarbon
  • SK10-F4P-BMM Polyurethane
  • SK10-F4U-BOO Urethane

Order Code

UPCV10-F41_Order