Valves - Pressure Controls - Pressure Reducing Valve - Direct Acting

PR08-32

PRESSURE REDUCING/ RELIEVING CARTRIDGE VALVE

Overview

Description

The PR08-32X is a screw in, cartridge style, direct acting, spool type, hydraulic pressure reducing/relieving valve with internal pilot and internal spring chamber drain. It is designed to act as a pressure regulating device for secondary circuits. It is intended for use in stable input flow circuits

Operation

In its steady state, the PR08-32X allows flow bidirectionally from port 2 to port 1, with the spring chamber constantly drained at port 3. On attainment of a pre-determined pressure at port 1, the cartridge shifts to block flow at port 2, thereby regulating pressure at port 1. In this mode, the valve will also relieve port 1 to port 3 at a variable value over the set reducing pressure

Features

  • Adjustments cannot be backed out of the valve.
  • Adjustments prohibit springs from going solid.
  • Optional spring ranges to 152 bar (2200 psi).
  • Hardened spool and cage for long life.
  • Compact, industry-common size.

Ratings

Pressure Ratings
Pressure rating
241.3 bar (3500 psi) Port 1
241.3 bar (3500 psi) Port 2
103.4 bar (1500 psi) Port 3
Proof pressure
517.1 bar (7500 psi)
Burst pressure
896.3 bar (13000 psi)
Crack pressure defined
Pressure evident at 0.95 lpm (0.25 gpm) attained port 1 to port 2
Flow Ratings
Flow rating
11.4 lpm (3 gpm)
Maximum internal leakage
82 ml/min (5 in³/min) Port 2 to 3 at to 90% of nominal setting 206.8 bar (3000 psi)
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
-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
PR08-32X type iii clear zinc plating per ASTM b633 gpr08-32x 960 hr salt spray per ASTM b117

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

Cartridge weight
0.23 kg (0.51 lb) PR08-32A
0.28 kg (0.61 lb) Pr08-32c/l
0.25 kg (0.56 lb) PR08-32B
0.22 kg (0.48 lb) Pr08-32f/h
Internal wetted surface area
130 cm² (20.1 in²) Pr08-32a/b/c/l
140 cm² (21.7 in²) Pr08-32f/h

Performance

PR08-32_Flow-Pressure

Dimensions

PR08-32_Dim

Materials

Materials

Cartridge: Weight: 0.25 kg (0.55 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and back-ups standard. Anodized aluminum knobs.

Standard Ported Body: Weight: 0.27 kg (0.60 lb); 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
VC08-3
Cartridge installation torque
25.8 to 28.5 N-m (19 to 21 ft-lb)
47.5 N-m (35 ft-lb)
H style plug torque
33.9 N-m (25 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK08-3X-BM X = N and V seal options
SK08-3U-OO U seal option

Order code

POSITION
CODE
DESCRIPTION
PR08-32F-H-J-R/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
4T
Aluminum SAE 4
H
6T
Aluminum SAE 6
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
03
3.4 to 20.7 bar (50 to 300 psi) Spring Range
R
06
6.9 to 41.4 bar (100 to 600 psi) Spring Range
R
12
20.7 to 82.8 bar (300 to 1200 psi) Spring Range
R
22
34.5 to 151.7 bar (500 to 2200 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
PR08-32_Order