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
Maximum 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

Cartridge 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
VC10-3
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