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A screw-in, cartridge-style, pilot-operated (two-stage), spool-type hydraulic relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response and low hysteresis.
The RV12-26 blocks flow from ➀ to ➁ until suffi cient pressure is present at ➀ to force the piloting relief off its seat, allowing the main (second stage) spool to shift,
opening ➀ to ➁The cartridge offers smooth transition in response to load changes in demanding
hydraulic circuits.
NOTE: The RV12-26 cannot be used in crossover relief applications.
• 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 241 bar (3500 psi).
• Fast, smooth response to pressure surges.
• Cost effective cavity.
Operating Pressure: 241 bar (3500 psi)
Proof Pressure: 420 bar (6090 psi)
Flow: See Performance Chart
Internal Leakage: 115 cc/minute (7 cu. in./minute) max. to 85% of nominal setting
Crack Pressure Defi ned: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Standard Spring Ranges: 6.9 to 27.6 bar (100 to 400 psi); 13.8 to 110.3 bar (200 to 1600 psi); 31.0 to 206.9 bar (450 to 3000 psi); 34.5 to 241.4 bar (500 to 3500 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
Cavity: VC12-2; See page 9.112.1
Cavity Tool: CT12-2XX; See page 8.600.1
Seal Kit: SK12-2X-B; See page 8.650.1
