Valves - Pressure Controls - Pressure Reducing Valve - Piloted

PR50-36

PRESSURE REDUCING/ RELIEVING VALVE US PATENT # 7,137,406

Overview

Description

The PR50-36XX 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. Port 2 may be protected by 60 mesh, 250 micron rated screen with option S.

Operation

In its steady state, the PR50-36XX 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.

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 size.
Pressure Ratings
Pressure rating:
  • 344.7 bar (5000 psi) Ports 1 and 2
  • 69 bar (1000 psi) Port 3
Proof pressure:
  • 482.6 bar (7000 psi)
Burst pressure:
  • 965.3 bar (14000 psi)
Flow Ratings
Flow rating:
  • 56.8 lpm (15 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:
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
  • -54 to 107 °C (-65 to 225 °F) With urethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 90 °C (-40 to 194 °F)
Other Ratings
Corrosion protection:
  • GPR50-36X - 960 hr salt spray per ASTM B117
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.26 kg (0.57 lb) PR50-36A
  • 0.28 kg (0.62 lb) PR50-36B
  • 0.30 kg (0.66 lb) PR50-36C
  • 0.25 kg (0.55 lb) PR50-36F
  • 0.25 kg (0.55 lb) PR50-36H
  • 0.30 kg (0.66 lb) PR50-36L
Internal wetted surface area:
  • 145 cm² (22.4 in²) "A". "B". "C" and "L"
  • 162 cm² (25.1 in²) "F" and "H"
PR50-36_Perf(2022-02-24)
PR50-36_Dim(2022-02-24)
Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
  • 32.5 to 35.3 N-m (24 to 26 ft-lb) H-style plug
Orientation restriction:
  • None
Seal kit:
  • SK10-3P-BM Polyurethane
  • SK10-3U-OO Urethane
PR50-36_Order(2022-02-24)

Model Options

PR50-36F-H-J-R/S
F Adjustment Option
CODE
DESCRIPTION
A
1/4" Hex Allen Head
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
C
1/4" Hex Allen Head with Cover Cap
F
Factory Preset Non-Adjustable
H
Factory Preset Hidden Adjustment
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
CODE
DESCRIPTION
0
No Body
6T
Aluminum SAE 6
8T
Aluminum SAE 8
6TD
Ductile Iron SAE 6
8TD
Ductile Iron SAE 8
3B
Aluminum BSPP 3/8" (3)
3BD
Ductile Iron BSPP 3/8" (3)
J Seal
CODE
DESCRIPTION
N
Buna-N
V
Fluorocarbon
P
Polyurethane
R Spring
CODE
DESCRIPTION
15
27.6 to 103.4 bar (400 to 1500 psi) Spring Range
30
103.4 to 206.8 bar (1500 to 3000 psi) Spring Range
50
206.8 to 344.7 bar (3000 to 5000 psi) Spring Range
S Setting
CODE
DESCRIPTION
MXXX
Spring Setting in XXX bar
XX
Spring Setting in XX psi (x 100)