Valves - Pressure Controls - Relief Valve - Direct Acting - Poppet Type

RV08-20

RELIEF VALVE CARTRIDGE DIRECT ACTING POPPET TYPE

Overview

Description

RV08-20X is a screw in, cartridge style, direct acting, poppet type, hydraulic relief valve intended for lower flow circuits requiring low internal leakage

Operation

RV08-20X blocks flow from port 1 to port 2 until sufficient pressure is present at port 1 to force the spring opposed poppet off its seat

Features

  • Adjustments cannot be backed out of the valve.
  • Variety of pressure adjustment options including non-adjustable factory preset.
  • Adjustments options A, B, and C: positive stops prevent springs from going solid.
  • Optional spring ranges to 248 bar (3600 psi).
  • Rapid response to pressure changes.
  • Optional bi-directional pressure (requires bi-directional pressure seal option).
  • Compact size.

Notes

Supersession: Existing and new applications.

RVD58-20 Is our best-in-class relief valve and can functionally replace this valve in most applications. We strongly encourage you to consider this newer alternative.

Considerations:

  • Comparable pressure and flow ratings
  • Comparable response rate
  • Better pressure rise characteristics
  • Smaller size
  • No dynamic seal
  • Competitive cost
  • VC08-2B cavity variation is required. Some manifolds may allow drop-in replacement.
  • Assistance is available to evaluate your application

Ratings

Pressure Ratings
Pressure rating:
  • 275.8 bar (4000 psi)
  • 482.6 bar (7000 psi)
Burst pressure:
  • 896.3 bar (13000 psi)
Relief pressure defined:
  • Pressure evident at
  • 0.95 lpm (0.25 gpm)
Reseat pressure:
  • Nominal 80% of crack
Flow Ratings
Flow rating:
  • 22.7 lpm (6 gpm) At max pressure
Maximum internal leakage:
  • 0.25 ml/min (5 drops/min) Max to 75% 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 urethane seals with polyurethane 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

Unit weight:
  • 0.17 kg (0.37 lb) A
  • 0.19 kg (0.42 lb) B
  • 0.22 kg (0.47 lb) C l
  • 0.16 kg (0.35 lb) F h
Internal wetted surface area:
  • 141 cm² (21.9 in²) A b c l
  • 166 cm² (25.7 in²) F h

Performance

RV08-20_Flow-Pressure

Dimensions

RV08-20_Dim

Materials

Materials

Cartridge: Weight: 0.16 kg (0.35 lb) to 0.22 kg (0.47 lb) depending on adjustment option. Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings standard. Anodized aluminum knobs and caps.

Standard Ported Body: Weight: 0.16 kg (0.35 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:
Cartridge installation torque:
  • 25.8 to 28.5 N-m (19 to 21 ft-lb)
Maximum allowable torque:
  • 40.7 N-m (30 ft-lb)
H style plug torque:
  • 10.8 to 13.6 N-m (8 to 10 ft-lb) N V P U
  • 34 N-m (25 ft-lb) NC VC PC max
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK08-2X-B X=seal option
  • SK08-2X-M X=seal option
  • SK08-2U-O X=seal option

Order Code

POSITION
CODE
DESCRIPTION
RV08-20F-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
4T
Aluminum SAE 4
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
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
NC
Buna-N for Crossover Applications
J
V
Fluorocarbon
J
VC
Fluorocarbon for Crossover Applications
J
P
Polyurethane
J
PC
Polyurethane for Crossover Applications
J
U
PPDI Urethane
R
Spring
R
05
3.4 to 34.5 bar (50 to 500 psi) Spring Range
R
09
6.9 to 75.8 bar (100 to 1300 psi) Spring Range
R
18
17.2 to 158.6 bar (250 to 2300 psi) Spring Range
R
33
17.2 to 251.2 bar (250 to 3600 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
RV08-20_Order