Valves - Pressure Controls - Pressure Reducing Valve - Direct Acting

PRES50-30

PRESSURE REDUCING / RELIEVING CARTRIDGE VALVE

Overview

Description

PRES50-30 is a screw in, cartridge style, direct-acting, spool-type, hydraulic pressure reducing/relieving valve designed to act as a pressure regulating device for secondary circuits. It is intended for use in stable input flow circuits

Operation

In its steady state, the PRES50-30 allows flow to pass bidirectionally from port 3 to port 2 with the spring chamber constantly drained at port 1. Upon attainment of a predetermined pressure at port 2, the cartridge shifts to block flow at port 3, thereby regulating pressure at port 2. In this mode, the valve will also relieve port 2 to port 1 at a variable value over the set reducing pressure

note: tank port pressure is additive to valve setting at ratio of 1:1

Features

  • High Pressure steel adapter on inlet port 3 withstands up to 345 bar (5000 psi).
  • Hardened spool and cage for long life.

Ratings

Pressure Ratings
Pressure rating:
  • 344.7 bar (5000 psi) Port 3
  • 137.9 bar (2000 psi) Port 2
  • 68.9 bar (1000 psi) Port 1
Proof pressure:
  • 551.6 bar (8000 psi)
Burst pressure:
  • 1379 bar (20000 psi)
Regulated pressure range:
  • 31 to 55.2 bar (450 to 800 psi) At 0.95 lpm (0.25 gpm)
Flow Ratings
Flow rating:
  • 11.4 lpm (3 gpm)
Maximum internal leakage:
  • 131 ml/min (8 in³/min) To port 1
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With viton seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)

Operating Parameters

Fluids:
  • Mineral based or synthetic with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406

Properties

Unit weight:
  • 0.22 kg (0.49 lb)
Internal wetted surface area:
  • 158 cm² (24.5 in²)

Performance

PRES50-30_RedRel_Flow-Pressure PRS50-30_Flow-Pressure

Dimensions

PRES50-30_Dim

Materials

Materials

Cartridge: Weight: 0.22 kg (0.49 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; O-rings standard.

Standard Ported Body: Weight: 0.34 kg (0.75 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.

Installation Specifications

Cavity:
Cartridge installation torque:
  • 67.8 to 74.6 N-m (50 to 55 ft-lb)
  • 31.2 to 36.6 N-m (23 to 27 ft-lb) Torque at port 3:
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK10-2X-O_SPL X=seal option

Order Code

POSITION
CODE
DESCRIPTION
PRES50-30-H-J-R/S
H
Line Body
H
0
No Body
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
R
Spring
R
08
31 to 55.2 bar (450 to 800 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
PRES50-30_Order