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

RV12-26

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

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Overview

Description

RV12-26X 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 RV12-26X 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.
  • Adjustments prohibit springs from going solid.
  • Hardened spool and cage for long life.
  • Optional spring ranges to 240 bar (3500 psi).
  • Rapid, smooth response to pressure surges.
  • Cost-effective cavity.
Pressure Ratings
Pressure rating:
  • 241.3 bar (3500 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)
Flow Ratings
Flow rating:
  • 170.3 lpm (45 gpm) At max pressure
Maximum internal leakage:
  • 197 ml/min (12 in³/min) At port 2 at 85% of nominal setting
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
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 (grv12-26x)
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) A b c l
  • 221 cm² (34.3 in²) F h
RV12-26_Flow-Pressure(2022-02-24)
RV12-26_Dim(2022-02-24)
Cavity:
  • VC12-2
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
  • 33.9 to 35.3 N-m (25 to 26 ft-lb) H-style plug
Orientation restriction:
  • None
Seal kit:
  • SK12-2X-B X = seal option
Housings:
RV12-26_Order(2022-02-24)

Model Options

RV12-26F-H-J-R/S
F Adjustment Option
CODE
DESCRIPTION
A
1/4" Hex Allen Head
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
C
1/4" Hex Allen Head with Cover Cap
F
Factory Preset Non-Adjustable
H
Factory Preset Hidden Adjustment
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
CODE
DESCRIPTION
0
No Body
10T
Aluminum SAE 10
12T
Aluminum SAE 12
16T
Aluminum SAE 16
12TD
Ductile Iron SAE 12
16TD
Ductile Iron SAE 16
8B
Aluminum BSPP 1" (8)
8BD
Ductile Iron BSPP 1" (8)
J Seal
CODE
DESCRIPTION
N
Buna-N
V
Fluorocarbon
P
Polyurethane
U
PPDI Urethane
R Spring
CODE
DESCRIPTION
04
6.9 to 27.6 bar (100 to 400 psi) Spring Range
15
3.8 to 110.3 bar (200 to 1600 psi) Spring Range
30
31 to 206.9 bar (450 to 3000 psi) Spring Range
35
34.5 to 241.5 bar (500 to 3500 psi) Spring Range
S Setting
CODE
DESCRIPTION
MXXX
Spring Setting in XXX bar
XX
Spring Setting in XX psi (x 100)

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