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

RV12-26

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

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.

Ratings

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)

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

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

Performance

RV12-26_Flow-Pressure

Dimensions

RV12-26_Dim

Materials

Materials

Cartridge: Weight: 0.34 kg (0.75 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-up standard. Anodized aluminum knobs.

Standard Ported Body: Weight: 0.57 kg (1.25 lb); Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions may differ.

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)
33.9 to 35.3 N-m (25 to 26 ft-lb) H-style plug
Orientation restriction
None

Accessories

Seal kit
SK12-2X-B X = seal option

Order Code

POSITION
CODE
DESCRIPTION
RV12-26F-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
J
U
PPDI Urethane
R
Spring
R
04
6.9 to 27.6 bar (100 to 400 psi) Spring Range
R
15
3.8 to 110.3 bar (200 to 1600 psi) Spring Range
R
30
31 to 206.9 bar (450 to 3000 psi) Spring Range
R
35
34.5 to 241.5 bar (500 to 3500 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
RV12-26_Order