PRESSURE CONTROLS
RV50-22 Relief, Differential Area Poppet
DESCRIPTION
A screw-in, cartridge-style, direct-acting, differential area, poppet-type hydraulic relief
valve for use as a pressure limiting device in more demanding hydraulic circuits
requiring low hysteresis and low internal leakage at high working pressures.
OPERATION
The RV50-22 blocks fl ow from ➁ to ➀ until suffi cient pressure is present at ➁ to
force the poppet from its seat.
The cartridge offers smooth transition in response to load changes in common
hydraulic circuits.
Note: The RV50-22 may not be used in cross-over relief applications (back pressure
on
➀).
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened poppet and cage for long life.
• Smooth response to pressure surges.
• Industry common cavity.
RATINGS
Operating Pressure: 345 bar (5000 psi)
Flow: The Performance Chart illustrates fl ow handling capacity at maximum setting.
Pressure rise will vary with setting due to fl ow forces. Consult factory for specifi c
fl ow characteristic values.
Pressure Rise: 0.34 bar/l (5 psi/g)
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 85% of nominal setting
Crack (Set) Pressure Defi ned: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Standard Spring Range: 34.5 to 344.8 bar (500 to 5000 psi) at 80% accuracy
Temperature: -40 to 120°C
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC10-2; See page 9.110.1
Cavity Tool: CT10-2XX; See page 8.600.1
Seal Kit: SK10-2P-T; See page 8.650.1
USASI/ISO:
SYMBOLS
PERFORMANCE (Cartridge Only)
6.055.1
276/4000
221/3200
166/2400
110/1600
55/800
18.9
5
37.9
10
FLOW RATE lpm/gpm
PRESSURE RISE bar/psi
Flow Characteristic
32 cSt/150 ssu oil at 40°C
56.8
15
75.8
20
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DIMENSIONS
MATERIALS
Cartridge: Weight: 0.23 kg. (0.50 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Polyurethane seals with
Fluorocarbon back-ups for
pressures over 240 bar (3500 psi).
Anodized aluminum knob.
Ported Body: Weight: 0.54 kg.
(1.2 lbs.) Ductile Iron (code "D")
standard, consult factory for
weight, dimensions may differ.
Rated to 345 bar (5000 psi).
See page 8.010.1.
TO ORDER
RV50-22__ - __ __ __ - __ - __ __ / __ __ __ __
Spring Range
50 34.5 to 344.8 bar
(500 to 5000 psi)
Setting in bar
†
(Blank) for Adjustable, or
Specify, for example:
M45 45 bar
M100 100 bar
Setting in psi
†
(Blank) for Adjustable, or
Specify, for example:
29.0 2900 psi
43.5 4350 psi
†
Adjustable valves will be
preset to approx. 50% of
spring max. potential.
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A w/ Cover Cap C
Factory Preset Non-Adj. F
Factory Preset
Hidden Adj. H
Option C w/
Lockwire Holes L
Seals
Pressure on
P Only:
P Polyurethane
(Std.)
RV50-22
6.055.2
Porting
Cartridge Only 0
SAE 6 6TD
SAE 8 8TD
1/4 in. BSP* 2BD
3/8 in. BSP* 3BD
*BSP Body; U.K. Mfr. Only
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