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.

Ratings

Pressure Ratings
Pressure rating:
  • 344.7 bar (5000 psi) Port 1
  • 344.7 bar (5000 psi) Port 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

Operating Parameters

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

Properties

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"

Performance

PR50-36_Flow-Pressure

Dimensions

PR10-32_Dim

Materials

Materials

Cartridge: Weight with adjustment options F and H: 0.25 kg. (0.55 lbs.) With adjustment option A: 0.26 kg (0.57 lb.) With adjustment option B: 0.28 kg (0.62 lb.) With adjustment options C and L: 0.30 kg. (0.66 lb.) Steel with hardened work surfaces. Zinc-plated exposed surfaces. Polyurethane O-rings and Fluorocarbon back-ups standard. Anodized aluminum knobs and caps.

Standard 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).

Adjustment Option Details: See adjustment options

Installation Specifications

Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
  • 44.7 to 50.2 N-m (33 to 37 ft-lb) H-style plug
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK10-3P-BM Polyurethane
  • SK10-3U-OO Urethane

Order Code

POSITION
CODE
DESCRIPTION
PR50-36F-H-J-R/S
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
6T
Aluminum SAE 6
H
8T
Aluminum SAE 8
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
R
Spring
R
15
27.6 to 103.4 bar (400 to 1500 psi) Spring Range
R
30
103.4 to 206.8 bar (1500 to 3000 psi) Spring Range
R
50
206.8 to 344.7 bar (3000 to 5000 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
PR50-36_Order