Valves - Pressure Controls - Pressure Reducing Valve - Direct Acting

PR58-38

PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE

Overview

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.

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) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) 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) A
  • 0.26 kg (0.57 lb) B
  • 0.28 kg (0.61 lb) C l
  • 0.22 kg (0.49 lb) F h
Internal wetted surface area:
  • 141 cm² (21.9 in²) A b c l
  • 166 cm² (25.7 in²) F h

Performance

PR58-38_Flow-Pressure

Dimensions

PR58-38_Dim

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:
Cartridge installation torque:
  • 32.5 to 35.3 N-m (24 to 26 ft-lb)
  • 47.5 N-m (35 ft-lb) Maximum
Plug torque:
  • 47.5 N-m (25 ft-lb)
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK08-3X-BM X = seal option
  • SK08-3U-OO X = seal option

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
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)
PR58-38_Order