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Valves - Pressure Controls - Unloading Valve - Vented Spring Chamber

UP10-40

PRESSURE UNLOADING VALVE

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Overview

Description

The UP10-40X is a screw in, cartridge style, remote sequence, pilot unloading valve, with optional fixed unload/reload pressure ratios of 60%, 70%, or 80% for use in accumulator type hydraulic systems.

Operation

In its steady state, the UP10-40X blocks flow from port 2 to port 3. On attainment of a predetermined pressure at port 1, the spool shifts to allow flow from port 2 to port 3. The spring chamber is vented to port 4. If pressure at port 1 drops to a level below the ratio established reload value, the valve will close, blocking flow from port 2 to port 3.

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 size.
Pressure Ratings
Pressure rating:
  • 206.8 bar (3000 psi) Port 1, port 2, port 3
  • 68.9 bar (1000 psi) Port 4
Proof pressure:
  • 482.6 bar (7000 psi)
Burst pressure:
  • 965.3 bar (14000 psi)
Pressure setting:
  • 68.9 to 206.8 bar (1000 to 3000 psi)
Loading and unloading pressure ratio:
  • At
  • 3.8 lpm (1 gpm)
  • 206.8 bar (3000 psi)
Flow Ratings
Flow rating:
  • 3.8 lpm (1 gpm)
Maximum internal leakage:
  • 0.1 ml/min (2 drops/min) From port 1 to 2 at max pressure
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
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection:
  • UP10-40X gup10-40x type iii clear zinc plating 960 hr salt spray per ASTM b633 per ASTM b117
Fluids:
  • Mineral based or synthetic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.27 kg (0.64 lb) A
  • 0.29 kg (0.69 lb) B
  • 0.31 kg (0.74 lb) C l
  • 0.26 kg (0.62 lb) F h
Internal wetted surface area:
  • 207 cm² (32.1 in²) A b c l
  • 216 cm² (33.5 in²) F h
UP10-40_Flow-Pressure(2022-02-24)
UP10-40_Dim(2022-02-24)
Cavity:
  • VC10-4
Cartridge installation torque:
  • 32.5 to 35.3 N-m (24 to 26 ft-lb)
H style plug torque:
  • 33.9 N-m (25 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK10-4X-BBM X=seal option
Housings:
UP10-40_Order(2022-02-24)

Model Options

UP10-40F-H-J-NR/S
F Adjustment Option
CODE
DESCRIPTION
A
1/4" Hex Allen Head
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
C
1/4" Hex Allen Head with Cover Cap
F
Factory Preset Non-Adjustable
H
Factory Preset Hidden Adjustment
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
CODE
DESCRIPTION
0
No Body
6T
Aluminum SAE 6
8T
Aluminum SAE 8
6TD
Ductile Iron SAE 6
J Seal
CODE
DESCRIPTION
N
Buna-N
V
Fluorocarbon
P
Polyurethane
U
PPDI Urethane
N Ratio
CODE
DESCRIPTION
60
60% Ratio
70
70% Ratio
80
80% Ratio
R Spring
CODE
DESCRIPTION
30
68.9 to 206.8 bar (1000 to 3000 psi) Spring Range
S Setting
CODE
DESCRIPTION
MXXX
Spring Setting in XXX bar
XX
Spring Setting in XX psi (x 100)
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