Valves - Pressure Controls - Relief Valve - Piloted - Spool Type

RV50-26

PILOT OPERATED RELIEF VALVE U.S. PATENT # 7,137,406

Overview

Description

RV50-26X is a screw in, cartridge style, pilot operated (two stage), spool type hydraulic relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response and low hysteresis

Operation

The RV50-26X blocks flow from port 1 to port 2 until sufficient pressure is present at port 1 to force the piloting relief off its seat, allowing the main (second stage) spool to shift, opening port 1 to port 2

note: this valve cannot be used in cross-over relief applications

Features

  • Adjustments cannot be backed out of the valve.
  • Adjustments prohibit springs from going solid.
  • Hardened spool and cage for long life.
  • Rapid, smooth response to pressure changes.
  • Industry-common size.
Pressure Ratings
Pressure rating:
  • 344.7 bar (5000 psi)
Proof pressure:
  • 517.1 bar (7500 psi)
Burst pressure:
  • 1037.7 bar (15050 psi)
Relief pressure defined:
  • Pressure evident at
  • 7.57 lpm (2 gpm)
Reseat pressure:
  • Nominal 90% of crack
Relief pressure range:
  • 20.7 to 344.7 bar (300 to 5000 psi) From zero to maximum control current
Flow Ratings
Flow rating:
  • 113.6 lpm (30 gpm) At max pressure
Maximum internal leakage:
  • 147 ml/min (9 in³/min) Port 2, at 85% of max crack
Other Ratings
Cycle life:
  • 500000 cycles at
  • 241.3 bar (3500 psi)
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 fluorocarbon seals
  • -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 70 °C (-40 to 160 °F)
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
Unit weight:
  • 0.25 kg (0.55 lb) A
  • 0.27 kg (0.60 lb) B
  • 0.29 kg (0.65 lb) C l
  • 0.24 kg (0.53 lb) F h
Internal wetted surface area:
  • 141 cm² (21.8 in²) A b c l
  • 161 cm² (24.9 in²) F h
RV50-26_Flow-Pressure
RV10-26_Dim

Materials

Cartridge: Weight: 0.24-0.29 kg (0.53-0.65 lb) depending on adjustment option Steel with hardened work surfaces. Zinc-plated exposed surfaces. Polyurethane seals with Fluorocarbon back-ups for pressures over 240 bar (3500 psi). Anodized aluminum knobs.

Ported Body: Weight: 0.54 kg (1.2 lb) Ductile Iron (code "D") standard, consult factory for weight, dimensions may differ. Rated to 345 bar (5000 psi).

Adjustment Option Details: See adjustment options

Cavity:
Cartridge installation torque:
  • 47.6 to 50.2 N-m (35 to 37 ft-lb)
Maximum allowable torque:
  • 67.8 N-m (50 ft-lb)
H style plug torque:
  • 10.8 to 13.6 N-m (8 to 10 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK10-2X-B X=n,v,p
  • SK10-2U-O Urethane
RV50-26_Order
POSITION
CODE
DESCRIPTION
RV50-26F-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
2B
Aluminum BSPP 1/4" (2)
H
3B
Aluminum BSPP 3/8" (3)
H
4B
Aluminum BSPP 1/2" (4)
H
4BD
Ductile Iron BSPP 1/2" (4)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
R
Spring
R
50
27.6 to 344.7 bar (300 to 5000 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)