Valves - Pressure Controls - Unloading Valve - Vented Spring Chamber

UP10-40

PRESSURE UNLOADING VALVE

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.

Ratings

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
Maximum 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

Operating Parameters

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

Properties

Cartridge 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

Performance

UP10-40_Flow-Pressure

Dimensions

UP10-40_Dim

Materials

Cartridge: Weight: 0.34 kg. (0.70 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-ups standard. Anodized aluminum knobs and caps.

Standard Ported Body: Weight: 0.34 kg. (0.70 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.

Adjustment Option Details: See adjustment options

Installation Specifications

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

Accessories

Seal kit
SK10-4X-BBM X=seal option

Order code

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