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.

Ratings

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
Maximum 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)

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
0.35 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)

Performance

RV52-26_Flow-Pressure

Dimensions

RV52-26_Dim

Materials

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

Installation Specifications

Cavity
VC12-2
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

Accessories

Order code

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)
RV52-26_Order