PRESSURE CONTROLS
PR50-36 Pressure Reducing/Relieving, Pilot-Operated
USASI/ISO:
SYMBOLS
PERFORMANCE (Cartridge Only)
6.442.1
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 for secondary circuits.
OPERATION
In its steady state, the PR50-36 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 cartridge shifts to restrict input
fl ow at
➁, thereby regulating pressure at ➀. In this mode, the valve will also relieve
➀ to ➂.
Deadband (from reducing to relieving) pressure rise over reduced pressure setting:
Non-fl ow condition: approximately 0.55 bar (8 psi); with fl ow: approximately 2.1 bar
(30 psi).
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 345 bar (5000 psi).
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 345 bar (5000 psi)
Flow: See Performance Chart
Pilot Orifi ce: Pilot-operated through 0.51 mm (0.020 inch) hole
Standard Spring Ranges (Reducing Function): 27.6 to 103.4 bar (400 to 1500 psi);
103.4 to 206.9 bar (1500 to 3000 psi); 206.9 to 344.8 bar (3000 to 5000 psi)
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: VC10-3; See page 9.110.1
Cavity Tool: CT10-3XX; See page 8.600.1
Seal Kit: SK10-3P-BM; See page 8.650.1
207/3000
172/2500
138/2000
103/1500
69/1000
38
10
19
5
0
0
38
10
FLOW RATE lpm/gpm
PRESSURE RISE bar/psi
Flow Characteristic
32 cSt/150 ssu oil at 40°C
19
5
Relieving Reducing
35/500
56
15
56
15
240/3500
Patent
Pending
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
DIMENSIONS
MATERIALS
Cartridge: Weight: 0.27 kg. (0.60 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Polyurethane O-rings and
Fluorocarbon back-ups standard.
Anodized aluminum knobs
and caps.
Ported Body: Weight: 0.64 kg.
(1.41 lbs.) Ductile Iron (code "D")
standard, consult factory for
weight, dimensions may differ.
Rated to 345 bar (5000 psi).
See page 8.010.1
TO ORDER
PR50-36__ - __ __ __ - __ - __ __ / __ __ __ __
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 Adjust.
(See page 6.003.1) H
Option C
w/Lockwire Holes L
Porting
Cartridge Only 0
SAE 6 (Ductile) 6TD
Spring Range
15 27.6 to 103.4 bar
(400 to 1500 psi)
30 103.4 to 206.9 bar
(1500 to 3000 psi)
50 206.9 to 344.8 bar
(3000 to 5000 psi)
Seals
Polyurethane P
PR50-36
6.442.2
†
Adjustable valves will be preset to
approx. 50% of spring max. potential.
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
Patent Pending
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
