Symbol
Description
The pr58-38xxx is a screw in, cartridge style, direct acting, spool type, hydraulic pressure
reducing/relieving valve with internal spring chamber drain, and spool damping chamber
Operation
It is designed to act as a pressure regulating device for secondary circuits. In its steady state, the pr58-
38xxx allows flow to pass bidirectionally from port 2 to port 1 with the spring chamber constantly drained
at port 3. Upon attainment of a predetermined 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..
Port 2 may be protected by a 60 x 60 mesh screen
Features
Adjustments cannot be backed out of the valve.
Adjustments prohibit springs from going solid.
Optional spring ranges to 248 bar (4200 psi)
Optional 233 micron screen.
Hardened spool and cage for long life.
Compact, industry-common size.
Overview
Ratings
Pressure Ratings
Pressure rating
344.7 bar (5000 psi)
Proof pressure
379.2 bar (5500 psi)
Burst pressure
896.3 bar (13000 psi)
Maximum tank port pressure
68.9 bar (1000 psi)
Flow Ratings
Flow rating
18.9 lpm (5 gpm)
Temperature Ratings
Operating fluid temperature
-40 to 100 °C (-40 to 212 °F) - Note: With buna N seals
-26 to 204 °C (-15 to 400 °F) - Note: With fluorocarbon seals
-54 to 107 °C (-65 to 225 °F) - Note: With polyurethane and urethane seals
Storage temperature
-40 to 70 °C (-40 to 160 °F)
Ambient temperature
-40 to 70 °C (-40 to 160 °F)
Operating Parameters
Fluids
Mineral based or synthetic with lubricating properties
Fluid viscosity range
7.4 to 420 cSt
Maximum operating contamination level
20/18/14 per ISO 4406 (tank port pressure is additive to pressure setting at ratio of 1:1)
Properties
Unit weight
0.23 kg (0.52 lb) - Note: A
0.26 kg (0.57 lb) - Note: B
0.28 kg (0.61 lb) - Note: C l
0.22 kg (0.49 lb) - Note: F h
Internal wetted surface area
141 cm² (21.9 in²) - Note: A b c l
166 cm² (25.7 in²) - Note: F h
PR58-38
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE
hydraforce.com
12/15/2020
PR58-38
Performance
Dimensions
Materials
Materials
Cartridge: Weight: 0.23 kg (0.52 lb) with A option; 0.26 kg (0.57 lb) with B option; 0.28 kg (0.61 lb) with C and L options; 0.22 kg (0.49 lb)
with F and H options. Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and polyester elastomer back-ups
standard. Anodized aluminum knob.
Standard Ported Body: Ductile iron (code D) bodies are required for operation over 207 bar (3000 psi). Anodized high-strength
aluminum alloy, rated to 207 bar (3000 psi) also available, dimensions may differ.
Adjustment Option Details: See adjustment options
Note: Orifice Disc should not be used with this valve
Installation Specifications
Cavity
VC08-3
Cartridge installation torque
32.5 to 35.3 N-m (24 to 26 ft-lb)
47.5 N-m (35 ft-lb) - Note: Maximum
Plug torque
47.5 N-m (25 ft-lb)
Orientation restriction
None
Accessories
Seal kit
SK08-3X-BM - Note: X = seal option
SK08-3U-OO - Note: X = seal option
Housings
Order Code
POSITION CODE DESCRIPTION
PR58-38DFG-H-J-R/S
D Rapid Response Option
D BLANK Standard
D R Rapid Response
F Adjustment Option
PR58-38
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE
hydraforce.com
12/15/2020
PR58-38
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
G Screen
G BLANK NONE
G S 60 Mesh Screen
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 05 10.3 to 37.9 bar (150 to 550 psi) Spring Range
R 20 34.5 to 141.3 bar (500 to 2050 psi) Spring Range
R 32 55.2 to 227.5 bar (800 to 3300 psi) Spring Range
R 42 227.6 to 289.6 bar (3301 to 4200 psi) Spring Range
S Setting
S MXXX Spring Setting in XXX bar
S XX Spring Setting in XX psi (x 100)
POSITION CODE DESCRIPTION
PR58-38
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE
hydraforce.com
12/15/2020
PR58-38
