PRESSURE CONTROLS
CRV08-22 Cross-Over Relief, Differential Area Poppet
DESCRIPTION
The CRV08-22 cross-port relief uses two RV08-22 cartridges in an in-line plumbed
housing. It is typically used to protect a hydraulic cylinder or motor from load-induced
pressure surges. The cartridges used are screw-in, differential area, poppet-type
valves, intended for use in lower fl ow circuits requiring low internal leakage.
OPERATION
The CRV08-22 manifold allows fl ow to pass through the separated ➀ to ➁ passages
at low pressure loss. If pressure in either passage exceeds the valve setting, fl ow will
cross over to the opposite passage.
Note: Back-pressure at the outlet port of the relief cartridges will increase the nominal
setting of the valve on a 1:1 basis (i.e. 6.9 bar/100 psi back-pressure increases the
nominal setting by 6.9 bar/100 psi).
See catalog page 6.045.1 for cartridge specifi cations.
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened poppet and cage for long life.
• Optional spring ranges to 180 bar (2600 psi).
• Smooth response to pressure surges.
• Industry common cavity.
• Compact size.
RATINGS
Operating Pressure: 180 bar (2600 psi)
Flow: The Performance Chart illustrates fl ow handling capacity at maximum
setting for each spring range option. Pressure rise will vary with spring (range)
and with setting within range due to fl ow forces. Consult factory for specifi c fl ow
characteristic values.
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 85% of nominal setting
Crack Pressure Defi ned: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Standard Spring Ranges:
3.4 to 27.6 bar (50 to 400 psi);
6.9 to 48.3 bar (100 to 700 psi);
10.3 to 89.7 bar (150 to 1300 psi);
13.8 to 179.3 bar (200 to 2600 psi)
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
Seal Kit: SK08-2X-M (for cross-over relief application) (2 required)
Body Part Number: 7070160
USASI/ISO:
SYMBOLS
6.270.1
PERFORMANCE (Cartridge Only)
207/3000
172/2500
138/2000
103/1500
69/1000
7.5
2
15.1
4
FLOW RATE lpm/gpm
PRESSURE RISE bar/psi
Flow Characteristic
32 cSt/150 ssu oil at 40°C
22.7
6
35/500
30.2
8
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DIMENSIONS
MATERIALS
Cartridges: (2 Required) Weight:
0.22 kg. (0.48 lbs.) Steel with
hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and Fluorocarbon
back-ups standard. Anodized
aluminum knob.
Standard Ported Body: Weight:
0.36 kg. (0.80 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi).
TO ORDER
CRV08-22
6.270.2
CRV08-22__ - 6T - __ - __ __ / __ __ __ __ - __ __ / __ __ __ __
__
Adjustment Option
A 1/4 in. Hex Allen Head
B 1-1/2 in. Dia. Alum. Knob
C Option A w/ Cover Cap
F Factory Preset Non-Adj.
H Factory Preset
Hidden Adj.
L Option C w/
Lockwire Holes
Porting
6T SAE 6
Seals
Bidirectional
Pressure:
NC Buna N
VC Fluorocarbon
Setting in bar
†
(Blank) for Adjustable, or
Specify, for example:
M25 25 bar
M100 100 bar
Setting in psi
†
(Blank) for Adjustable, or
Specify, for example:
9.0 900 psi
23.5 2350 psi
Spring Range
4 3.4 to 27.6 bar
(50 to 400 psi)
7 6.9 to 48.3 bar
(100 to 700 psi)
13 10.3 to 89.7 bar
(150 to 1300 psi)
26 13.8 to 179.3 bar
(200 to 2600 psi)
Repeat
to supply setting
group if both
valves are not
to be set at the
same pressures.
†
Adjustable valves will be
preset to approx. 50% of
spring max. potential.
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Note: European manufactured version
may differ in design/dimensions.
Consult HydraForce Hydraulics Ltd.
