Pressure Control Valves

PRES50-30 — Pressure Reducing/Relieving Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for PRES50-30.
  Request a quote.

PRES50-30 Valve

PRES50-30 Valve symbol

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

In its steady state, the PRES50-30 allows bidirectional flow from 3 to 2 with the spring
chamber constantly drained at 1. Upon attainment of a predetermined pressure at 2, the
valve will shift to block flow at 3, thereby regulating pressure at 2. In this mode, the valve
will also relieve port 2 to port 1 at a variable value over the set reducing pressure.
The tank port pressure is additive to the pressure setting at a ratio of 1:1.

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

Rated Pressure at Supply Port: 345 bar (5000 psi) maximum
Regulated Pressure Range: 31 to 55.2 bar (450 to 800 psi) at no-flow
Tank Port Pressure: 68.9 bar (1000 psi) maximum
Flow: up to 11.4 lpm (3.0 gpm)
Internal Leakage: 131 ml/minute (8 cu. in./minute) maximum
Spring Range: Model Code 50: 206.8 to 344.7 bar (3000 to 5000 psi)

Temperature: -40 to 100°C (-40 to 212°F) with Buna seals;
   -26 to 204°C (-15 to 400°F) with fluorocarbon seals;
   -54 to 107°C (-65 to 225°F) with polyurethane 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: VC98-3; See page 9.110_3w
Cavity Tool: CT98-3xx; See page 8.600.1
Seal Kit: SK16-2x-0_SPL; See page 8.650.1


PRES50-30 Flow-Pressure

PRES50-30 Flow vs Pressure
PRES50-30 Valve Dimensions


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.
See page 8.010_3w.

PRES50-30 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for PRES50-30. Request a quote.