Diesel Engine Controls

PR58-38 — Pressure Reducing/Relieving Spool Valve, High Pressure, Damped, Direct-Acting
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PR08-32 Valve

SYMBOL:
PR58-38 Valve symbol

DESCRIPTION
A screw-in, cartridge-style, direct-acting, spool-type pressure regulator with internal
spring chamber drain and spool damping chamber. It is designed to act as a pressure
regulating valve for secondary circuits. It may be specified for use as a pressure regulator
for diesel engine applications including variable flow pumps, fuel and oil controls, and
SCR/EGR emission and exhaust controls.

OPERATION
In its steady state, the PR58-38 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 1, the spool shifts to block flow at 2, thereby relieving pressure at 1. In this
mode, the valve will also relieve from port 1 to port 3.

FEATURES
• Compatible with diesel fuel types 1 and 2.
• Corrosion-resistant plating.
• Stainless steel option - consult factory.
• 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:
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)
Flow: up to 18.9 lpm (5 gpm); see performance chart
Internal Leakage: to port 3: 82 cc/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°F to 225°F) with Polyurethane seals
Filtration: Compatible with ISO Classification 19 (25 µm), NAS classification
Fluids: For use with common diesel fluids

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

PERFORMANCE:

PR58-38 Flow-Pressure

DIMENSIONS:
PR58-38 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.28 kg (0.61 lb) maximum, some models may weigh less; Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and TFE back-ups standard. Anodized aluminum knob.

Standard Ported Body: Weight: 0.27 kg (0.60 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi), dimensions may differ; Ductile iron (code ‘D’) bodies are required for operation over 207 bar (3000 psi). See page 8.008_3w.

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

PR58-38 Ordering Chart

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