Valves - Pressure Controls - Pressure Reducing Valve - Piloted

PR12-36

PRESSURE REDUCING/ RELIEVING VALVE U.S. PATENT # 7,137,406

Overview

Description

The PR12-36X is a spool type, pilot operated, hydraulic pressure reducing/relieving valve with internal pilot and internal spring chamber drain, designed to act as a pressure regulating device for secondary circuits

Operation

In its steady state, the PR12-36X 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 spool shifts to restrict inlet flow from port 2, thereby regulating pressure at port 1. In this mode the valve will also relieve port 1 to port 3

note: tank pressure is additive to regulated pressure

Features

  • Adjustments cannot be backed out of the valve.
  • Adjustments prohibit springs from going solid.
  • Optional spring ranges to 207 bar (3000 psi).
Pressure Ratings
Pressure rating:
  • 241.3 bar (3500 psi) Port 1
  • 241.3 bar (3500 psi) Port 2
  • 103.4 bar (1500 psi) Port 3
Proof pressure:
  • 517.1 bar (7500 psi) At all ports
Burst pressure:
  • 1034 bar (15000 psi)
Flow Ratings
Flow rating:
  • 189.2 lpm (50 gpm)
Maximum pilot flow:
  • 0.170 lpm (0.045 gpm) With maximum adjustment setting and with inlet pressure of 241 bar (3500 psi)
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per ASTM b117 (gpr12-36x)
Fluids:
  • Mineral based or synthetic with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406 (tank pressure is additive to regulated pressure)
Cleanliness:
  • All surfaces in contact with working fluid to meet jds-g169, 5.6 cleanliness level
Absolute maximum particle size:
  • 0.5 mm (0.02 in) Packaging to maintain cleanliness level during shipping and handling
Maximum operating contamination level:
  • Iso4406 18/16/13
Filtration requirements:
  • Iso4406 16/13
Maximum allowable contaminant:
  • 1.1 mg
Unit weight:
  • 0.41 kg (0.90 lb) PR12-36A
  • 0.43 kg (0.94 lb) PR12-36B
  • 0.45 kg (0.99 lb) Pr12-36c/l
  • 0.46 kg (1.01 lb) Pr12-36f/h
Internal wetted surface area:
  • 260 cm² (40.3 in²) Pr12-36a/b/c/l
  • 279 cm² (43.2 in²) Pr12-36f/h
PR12-36_perf-charts PR12-36_perf-chart
PR12-36_Dim

Materials

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.

Adjustment Option Details: See adjustment options

Cavity:
Cartridge installation torque:
  • 44.8 to 50.2 N-m (33 to 37 ft-lb)
H style plug torque:
  • 33.9 N-m (25 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-3X-BM X=seal options
PR12-36_Order
POSITION
CODE
DESCRIPTION
PR12-36DFG-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
H
Line Body
H
0
No Body
H
8T
Aluminum SAE 8
H
10T
Aluminum SAE 10
H
12T
Aluminum SAE 12
H
12TD
Ductile Iron SAE 12
H
6B
Aluminum BSPP 3/4" (6)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
R
Spring
R
04
6.9 to 27.6 bar (100 to 400 psi) Spring Range
R
15
10.3 to 103 bar (150 to 1500 psi) Spring Range
R
30
20.7 to 207 bar (300 to 3000 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)