RV10-28 Relief, Pilot-Operated w/Reverse Check (RV10-28)
A screw-in, cartridge-style, pilot-operated, two-stage, hydraulic relief valve with reverse flow check valve. It is intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response, low hysteresis, low leak-age, low pressure overshoot and reverse free flow features.
Product Operation
The RV10-28 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the pilot stage open, allowing the main stage to shift, opening 1 to 2.
The relief flow path is from 1 to 2. Reverse flow, from 2 to 1, occurs when the pressure at 2 is at least 2.1 bar (30 psi) higher than at port 1.
Product Features
• Adjustments cannot be backed out of the valve.
• Hardened spool and cage for long life.
• Fast response.
• Industry common cavity.
RATINGS: Relief Valve Mode
Pressure Rating: 289.6 bar (4200 psi)
Proof Pressure: 620.5 bar (9000 psi)
Burst Pressure: 1241.1 bar (18000 psi)
Flow Rating: Port 1 to 2: 113.6 lpm (30 gpm)
Internal Leakage: 0.53 ml/minute (10 drops/minute) max. to 80% of nominal setting
Crack Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Approximate Pressure Increment Per Adjuster Turn: 98.6 bar (1430 psi)
Response Time: Relief to Check switch at 241 bar/53 lpm (3500 psi/14 gpm) condition: 0.6 seconds
RATINGS: Check Valve Mode
Crack Pressure: 2.1 bar (30 psi)
Response Time: Check to Relief switch at 241 bar/53 lpm (3500 psi/14 gpm) condition: 0.3 seconds
RATINGS: Overall
Operating Temperature: with Buna N seals: -40 to 100°C (-40 to 212°F); with Viton seals: -26 to 204°C (-15 to 400°F); with Polyurethane seals: -54 to 107°C (-65 to 225°F)
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
