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

RV52-26

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

Overview

Description

RV52-26X is a screw in, cartridge style, pilot operated (two stage), spool type relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response and low hysteresis

Operation

The RV52-26X blocks flow from port 1 to port 2 until sufficient pressure is present at port 1 to force the pilot relief off its seat, allowing the main stage 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.
  • Adjustment options A, B and C: positive stops prevent springs from going solid.
  • Hardened spool and cage for long life.
  • Rapid, smooth response to pressure surges.
  • Cost-effective cavity.
Pressure Ratings
Pressure rating:
  • 344.7 bar (5000 psi) Port 1
  • 103.4 bar (1500 psi) Port 2
Proof pressure:
  • 689.5 bar (10000 psi)
Burst pressure:
  • 1379.0 bar (20000 psi)
Crack pressure defined:
  • Pressure evident at 7.6 lpm (2 gpm)
Relief pressure range:
  • 41.4 to 345 bar (600 to 5000 psi) From zero to maximum control current
Flow Ratings
Flow rating:
  • 189.3 lpm (50 gpm) At max pressure
Temperature Ratings
Operating fluid temperature:
  • -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)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per ASTM b117 (grv52-26x)
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:
  • 0.35 kg (0.78 lb) "a"
  • 0.38 kg (0.83 lb) "b"
  • 0.40 kg (0.88 lb) "c l"
  • 0.40 kg (0.89 lb) "f h"
Internal wetted surface area:
  • 209 cm² (32.4 in²)
  • 221 cm² (34.3 in²)
RV52-26_Flow-Pressure
RV52-26_Dim

Materials

Cartridge: Weight: 0.35 to 0.40 kg (0.78 to 0.88 lb) depending on adjustment option. Steel with hardened work surfaces. Zinc-plated exposed surfaces. Polyurethane O-rings and back-up standard. Anodized aluminum knobs.

Ported Body: Weight: 1.81 kg (4.0 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:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
H style plug torque:
  • 33.9 to 35.3 N-m (25 to 26 ft-lb)
Orientation restriction:
  • None
RV52-26_Order
POSITION
CODE
DESCRIPTION
RV52-26F-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
10T
Aluminum SAE 10
H
12T
Aluminum SAE 12
H
16T
Aluminum SAE 16
H
12TD
Ductile Iron SAE 12
H
16TD
Ductile Iron SAE 16
H
8B
Aluminum BSPP 1" (8)
H
8BD
Ductile Iron BSPP 1" (8)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
R
Spring
R
50
83 to 344.7 bar (1200 to 5000 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)