PRESSURE CONTROLS
PR10-31 Pressure Reducing/Direct-Acting Spool
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
6.400.1
DESCRIPTION
A screw-in, cartridge-style, direct-acting, spool-type, hydraulic pressure reducing
valve with internal pilot and internal spring chamber drain, designed to act as a
pressure-regulating device.
OPERATION
In its steady state, the PR10-31 allows flow to pass unidirectionally from ➁ to ➀, with
the spring chamber constantly drained at ➂.
On attainment of a pre-determined pressure at
➀, the cartridge shifts to restrict input
flow at ➁, thereby regulating pressure at ➀.
Note: Direct-acting PR series valves may not be suitable for some static load
applications. Consult factory.
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 207 bar (3000 psi).
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 210 bar (3000 psi)
Proof Pressure: 390 bar (5700 psi)
Flow: See Performance Chart
Pilot Orifice: Pilot-operated through 0.51 mm (0.020 inch) hole
Standard Spring Ranges (Reducing Function): 48.3 to 241 bar (700 to 3500 psi)
Temperature: -40 to 120°C with standard Buna seals
Filtration: Recommend 10µ nominal or better; See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 ssu)
Installation: No restrictions; See page 9.020.1
Cavity: VC10-3; See page 9.110.1
Cavity Tool: CT10-3XX; See page 8.600.1
Seal Kit: SK10-3X-BM; See page 8.650.1
207/3000
186/2700
166/2400
145/2100
124/1800
103/1500
83/1200
62/900
41/600
21/300
FLOW RATE lpm/gpm
PRESSURE bar/psi
Flow Characteristic
32 cSt/150 ssu oil at 40°C
7.5
2
15.1
4
22.7
6
30.2
8
H
YDRA
F
ORCE
®
Setting in bar
†
(Blank) for Adjustable, or
Specify, for example:
M50 50 bar
M100 100 bar
Setting in psi
†
(Blank) for Adjustable, or
Specify, for example:
9.0 900 psi
23.5 2350 psi
DIMENSIONS
MATERIALS
Cartridge: Weight: 0.27 kg. (0.60 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: 0.36
kg. (0.80 lbs.); Anodized high-
strength 6061 T6 aluminum alloy,
rated to 240 bar (3500 psi); See
page 8.010.1. Steel bodies available;
consult factory.
TO ORDER
PR10-31__ - __ __ __ - __ - __ __ / __ __ __ __
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A w/Cover Cap C
Factory Preset Non-Adj. F
Factory Preset
Hidden Adj.
(See page 6.003.1) H
Option C w/
Lockwire Holes L
0
Porting
Cartridge Only
SAE 6 6T
SAE 8 8T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
*BSP Body;
U.K. Mfr Only
Seals
Buna N (Std.) N
Fluorocarbon V
PR10-31
6.400.2
Spring Range
35 48.3 to 241 bar
(700 to 3500 psi)
†
Adjustable valves will be preset to
approx. 50% of spring max. potential.
3 5
