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.

Ratings

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
Maximum 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)

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

Cartridge 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

Performance

RV50-26_Flow-Pressure

Dimensions

RV10-26_Dim

Materials

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

Installation Specifications

Cavity
VC10-2
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

Accessories

Seal kit
SK10-2X-B X=n,v,p
SK10-2U-O Urethane

Order code

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)
RV50-26_Order