CRV08-20 Cross-Over Relief, Direct-Acting Poppet (CRV08-20)
The CRV08-20 cross-port relief uses two RV08-20 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, direct-acting, poppet-type valves, intended for use in lower flow circuits, requiring low internal leakage.
Product Operation
The CRV08-20 manifold allows flow to pass through the separated ➀ to ➁ passages at low pressure loss. If pressure in either passage exceeds the valve setting, flow 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 6.010.1 for cartridge specifi cations.
Product Features
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Optional spring ranges to 228 bar (3300 psi).
• Rapid response to pressure changes.
• Compact size.
Product Ratings
Operating Pressure: 228 bar (3300 psi)
Flow: The Performance Chart illustrates flow handling capacity at max. setting for each spring range option. Pressure rise will vary with spring (range) and with setting within range due to flow forces. Consult factory for specifi c flow characteristic values.
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 75% of nominal setting
Crack Pressure Defi ned: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Reseat Pressure: Nominal 80% of crack pressure
Standard Spring Ranges: 3.4 to 34.5 bar (50 to 500 psi);3.4 to 62.0 bar (50 to 900 psi);6.9 to 124 bar (100 to 1800 psi);6.9 to 227.5 bar (100 to 3300 psi)
Temperature: -40 to 120°C with standard Buna seals
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
