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A screw-in, cartridge-style, direct-acting, poppet-type, hydraulic relief valve intended for use as a pressure limiting device for common hydraulic circuit protection.
The RVD50-20 blocks flow from ➀ to ➁ until suffi cient pressure is present at ➀ to force the poppet from its seat.
The cartridge offers fast response to load changes in typical hydraulic circuits
requiring low hysteresis, low pressure rise and low internal leakage.
For cross-over applications, maximum recommended flow is 37.9 lpm (10 gpm)
and maximum pressure is 207 bar (3000 psi). See Ordering Table.
• Adjustments cannot be backed out of the valve.
• Height of the adjuster does not change when the pressure setting is adjusted.
• Adjustment options A, B, and C: positive stops prevent springs from going solid.
• Hardened poppet and cage for long life.
• Optional spring ranges to 345 bar (5000 psi).
• Rapid response to pressure surges.
• Industry common cavity.
Maximum Operating Pressure: 350 bar (5075 psi)
Flow: The Performance Chart illustrates flow handling capacity at maximum 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 80% of nominal setting
Crack (Set) Pressure Defi ned: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Reseat Pressure: Nominal 85% of crack pressure
Standard Spring Ranges: Due to manufacturing tolerances, it may be possible to adjust the valve either lower or higher than the nominal ratings shown below. Model Code
08: 13.7 bar to 58.6 bar (200 psi to 850 psi) Model Code
15: 41.4 bar to 103. 4 bar (600 psi to 1500 psi) Model Code
24: 96.5 bar to 165.5 bar (1400 psi to 2400 psi) Model Code
32: 137.9 bar to 220.6 bar (2000 psi to 3200 psi) Model Code
42: 206.8 bar to 289.6 bar (3000 psi to 4200 psi) Model Code
50: 275.8 bar to 344.7 bar (4000 psi to 5000 psi)
Storage Temperature: -40°C to 120°C with standard Buna N seals-35°C to 204°C with Fluorocarbon seals-54°C to 107°C with Polyurethane 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
Cavity: VC10-2; See page 9.110.1
Cavity Tool: CT10-2XX; See page 8.600.1
Seal Kit: SK10-2X-B; See page 8.650.1; SK10-2X-M for cross-over relief application – max. pressure 207 bar (3000 psi)
