RVCV56-20 Relief, Direct Acting, Anti-Cavitation (RVCV56-20)
A screw-in, cartridge-style, direct-acting, poppet-type hydraulic relief valve with a built-in reverse-flow anti-cavitation check valve. It is intended for use as a pressure limiting and regulating device in demanding, high-pressure hydraulic circuits which require fast response, low hysteresis, low leakage, low pressure override, and reverse free-flow features.
Product Operation
The RVCV56-20 blocks flow from 1 to 2 until sufficient pressure is present at 1 to displace the poppet off its seat. Relief flow discharges to port 2. Reverse flow occurs from 2 to 1 when differential pressure between 2 and 1 exceeds the check spring value.
Product Features
• Maximum pressure 420.6 bar (6100 psi) at port 1.
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Fast, smooth response to pressure surges.
Product Ratings
Pressure Rating: 420 bar (6100 psi) at port 1; 70 bar (1000 psi) at port 2
Proof Pressure: 480 bar (7000 psi)
Burst Pressure: 965 bar (14,000 psi)
Flow Rating: Port 1 to 2: 115 lpm (30 gpm); Port 2 to 1: 175 lpm (46 gpm)
Overshoot: Less than 20% of setting
Adjustable Pressure Range, Port 1 to 2: 140 bar (2000 psi) minimum;420 bar (6100 psi) maximum
Crack Pressure Defined: 0.95 lpm (0.25 gpm)
Maximum Reseat Pressure, Port 1 to 2: 85% of crack pressure
Leakage at Port 2: 10 drops/minute (0.53 ml/minute) at 103.4 bar (1500 psi) max.
Anti-Cavitation Crack Pressure, Port 1 to 2: 0.34 ± 0.07 bar (5 ± 1.0 psi)
Temperature: with Buna N seals: -40°C to 100°C (-40°F to 212°F);with Fluorocarbon seals: -26°C to 204°C (-15°F to 400°F);with Polyurethane seals: -54°C to 107°C (-65°F 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: VC16-2; See page 9.116.1
Cavity Tool: CT16-2XX; See page 8.600.1
Seal Kit: SK16-2x-B; See page 8.650.1
ISO SYMBOL
PERFORMANCE
6.022.1
HYDRAFORCE.com®
213455000414600027640002073000138200069100018.9575.62056.71537.81094.525FLOW lpm/gpmPRESSURE DIFFERENTIAL bar/psi
Relief Valve ModeMax. Pressure Drop; Cartridge and Body32 cSt/150 sus oil at 40°C113.430Max. SettingMin. SettingPress. Dropat Max. Opening10.31508.61256.91005.2751.7253.45038101133076201895015140FLOW lpm/gpmPRESSURE DIFFERENTIAL bar/psi
Check Valve ModeMax. Pressure Drop; Cartridge and Body32 cSt/150 sus oil at 40°C2276026570
