Pressure Control Valves

PR12-36 — Pressure Reducing/Relieving, Pilot-Operated Valve
  Selection guide - similar valves.
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  STP file for PR12-36.
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PR12-36 Valve

U.S. Patent 7,137,406

PR12-36 Valve symbol

A screw-in, cartridge-style, pilot-operated, 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.

In its steady state, the PR12-36 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 restrict input flow at 2, thereby regulating pressure at 1. In this mode, 1 to 3 will be relieved.
Deadband (from reducing to relieving) pressure rise over reduced pressure setting:
Flow Path: Reducing: 2 to 1; Relieving: 1 to 3.

• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 207 bar (3000 psi).

Operating Pressure: Port 1 and 2: 241 bar (3500 psi)
Maximum Tank Pressure: Port 3: 69 bar (1000 psi)
Proof Pressure: 517 bar (7500 psi)
Burst Pressure: 1034 bar (15000 psi)

Flow: up to 189 lpm (50 gpm); see performance chart
Maximum Pilot Flow and Leakage: 0.170 lpm (0.45 gpm) with maximum
   adjustment setting and with inlet pressure at 241 bar (3500 psi)
Standard Spring Ranges (Reducing Function): Code 04: 6.9 to 27.6 bar (100 to 400 psi);
   Code 15: 6.9 to 103 bar (100 to 1500 psi)
   Code 30: 20.7 to 207 bar (300 to 3000 psi)
Temperature: -40 to 100°C (-40 to 212°F) with Buna seals;
   -24 to 204°C (-15 to 400°F) with Fluorocarbon seals;
   -54 to 107°C (-65F to 225°F) with Polyurethane seals
Filtration: 10 microns or better recommended; 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: VC12-3; See page 9.112_3w
Cavity Tool: CT12-3xx; See page 8.600.1
Seal Kit: SK12-3x-BM; See page 8.650.1


PR12-36 Flow-Pressure


RV10-28 Flow-Pressure

RV10-28 Valve Dimensions


Cartridge: Weight (varies with adjustment option) 0.41 to 0.46 kg. (0.90 to 1.01 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings and polyester elastomer back-ups standard. Anodized aluminum knobs
and caps.

Standard Ported Body: Weight:
1.13 kg. (2.5 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ. See page 8.012_3w.

Adjustment Option Details:
See page 6.003.1

PR12-36 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for PR12-36 Request a quote.