PRESSURE CONTROLS
PR12-36 Pressure Reducing/Relieving, Pilot-Operated
USASI/ISO:
SYMBOL
PERFORMANCE
(Cartridge Only)
6.443.1
DESCRIPTION
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 in secondary circuits.
OPERATION
In its steady state, the PR12-36 allows fl ow to pass bidirectionally from ➁ to ➀, with
the spring chamber constantly drained at
➂.
On attainment of a pre-determined pressure at
➀, the spool shifts to restrict input fl ow
from port
➁, thereby regulating pressure at ➀. In this mode, the valve will also relieve
➀ to ➂.
Flow Path: Reducing:
➁ to ➀; Relieving: ➀ to ➂.
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 207 bar (3000 psi).
RATINGS
Operating Pressure: Ports ➀ and ➁: 276 bar (4000 psi)
Maximum Tank Pressure: Port
➂: 69 bar (1000 psi)
Flow: See Performance Chart
Standard Spring Ranges (Reducing Function):
Code 04: 6.9 to 27.6 bar (100 to 400 psi);
Code 30: 20.7 to 207 bar (300 to 3000 psi)
Maximum Pilot Flow and Leakage: 0.49 lpm (0.13 gpm) with max. control current
and with inlet pressure at 276 bar (4000 psi) at regulated fl ow of 3.8 lpm (1 gpm).
Temperature: -40 to 120°C with standard Buna 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: VC12-3; See page 9.110.1
Cavity Tool: CT12-3XX; See page 8.600.1
Seal Kit: SK12-3X-BM; See page 8.650.1
207/3000
172/2500
138/2000
103/1500
69/1000
38
10
0
0
30
15
04
38
10
76
20
114
30
151
40
FLOW RATE lpm/gpm
PRESSURE bar/psi
Typical Pressure vs. Flow at Maximun Pressure Setting
for Different Spring Ranges
32 cSt/150 sus oil at 40C
Relieving
Body and Line:
4.5 bar @189.3 lpm
(65 psi @ 50 gpm)
Reducing
Body and Line:
4.8 bar @189.3 lpm
(70 psi @ 50 gpm)
35/500
189
50
76
20
114
30
151
40
189
50
240/3500
Patent
Pending
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
Setting in bar
†
(Blank) for Adjustable, or
Specify, for example:
M25 25 bar
M100 100 bar
Setting in psi
†
(Blank) for Adjustable, or
Specify, for example:
9.0 900 psi
23.5 2350 psi
DIMENSIONS
†
Adjustable valves will be preset to
approx. 50% of spring max. potential.
MATERIALS
TO ORDER
PR12-36
__ - __ __ __ - __ - __ __ / __ __ __ __
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A w/Cover Cap C
Factory Preset Non-Adj. F
Factory Preset
Hidden Adjustment.
(See page 6.003.1) H
Option C
w/Lockwire Holes L
Spring Range
4 6.9 to 27.6 bar
(100 to 400 psi)
30 20.7 to 207 bar
(300 to 3000 psi)
Seals
Buna N (Std.) N
Fluorocarbon V
Polyurethane P
PR12-36
6.443.2
TORQUE
32–37 ft-lbs
(43.4–50.2 Nm)
Porting
Cartridge Only 0
SAE 8 8T
SAE 10 10T
SAE 12 12T
1/2 in. BSP* 4B
3/4 in. BSP* 6B
*BSP Body; U.K. Mfr. Only
Patent Pending
®
HYDRAFORCE
HYDRAFORCE
.com
®
Cartridge: Weight: 0.39 kg. (0.85 lbs.)
with “A” adjustment and “30” spring;
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 available; dimensions may differ.
See page 8.012.1
Blue rectangles are links to other catalog pages.
