Pressure Control Valves

PR58-38 — Pressure Reducing/Relieving Spool Valve, High Pressure, Damped, Direct-Acting
  Selection guide - similar valves.
  PDF file of this page.
  STP file for PR58-38.
  Request a quote.

PR08-32 Valve

PR58-38 Valve symbol

A screw-in, cartridge-style, direct-acting, spool-type, hydraulic pressure reducing/relieving
valve with internal pilot and internal spring chamber drain, designed to act as a pressure-regulating
device for secondary circuits. Internal damping makes this valve particularly suitable for use in
circuits with unstable input flows in demanding applications requiring enhanced stability.

In its steady state, the PR58-38 allows flow to pass bidirectionally from 2 to 1, with the spring
chamber constantly drained at 3. On attainment of a pre-determined pressure at 1, the cartridge
shifts to block flow at 2, thereby regulating pressure at 1. In this mode, the valve also will relieve
1 to 3 at a user-specified value over the set reducing pressure. Tank port pressure is additive to the
pressure setting at a ratio of 1:1.

• 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.

Operating Pressure: up to 345 bar (5000 psi)

Proof Pressure: 379 bar (5500 psi)
Burst Pressure: 896 bar (13000 psi)
Regulated Pressure Range: 10.3–220.6 bar (150–4200 psi)
   Note: 241 bar (3500 psi) maximum for 'F' and 'H' adjustment options
Maximum Tank Port Pressure: 68.9 bar (1000 psi)
Standard Spring Ranges: 10.3 to 289.6 bar (150 to 4200 psi) Shown in To Order section.
Due to manufacturing tolerances, it may be possible to adjust the valve either lower or
higher than the nominal ratings shown. If the valve is adjusted beyond the recommended
pressure range for F and H style adjuster options, the valve may not open to relieve pressure.
Flow: up to 18.9 lpm (5 gpm); see performance chart
Internal Leakage: to port 3: 82 ml/minute (5 cu. in/minute) maximum
Temperature: -40 to 100° C (-40 to 212° F) with Buna seals;
   -26 to 204° C (-15 to 400° F) with Fluorocarbon seals;
   -54 to 107° C (-65 to 225° F) with Polyurethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC08-3; See page 9.108_3w
Cavity Tool: CT08-3xx; See page 8.600.1
Seal Kit: SK08-3x-BM; See page 8.650.1


PR58-38 Flow-Pressure

PR58-38 Valve Dimensions


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.
See page 8.008_3w.

Adjustment Option Details:
See page 6.003.1
Note: Orifice Disc should not
be used with this valve

PR58-38 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for PR58-38 Request a quote.