Pressure Control Valves

RVCV56-20 — Relief, Direct Acting, Anti-Cavitation
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RVCV56-20 Valve

SYMBOL:
RVCV56-20 Valve symbol

DESCRIPTION
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.

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.

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.

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)
Operating Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
   -54 to 104°C (-65 to 225°F) 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: VC16-2; See page 9.116.1_2w
Cavity Tool: CT16-2xx; See page 8.600.1
Seal Kit: SK16-2x-B; See page 8.650.1

PERFORMANCE:

RVCV56-20 Performance Charts

DIMENSIONS:
RVCV56-20 Valve Dimensions

MATERIALS:

Cartridge:
Weight:
 Option 
A
B
C,L
F,H
lb
1.27
1.33
1.36
1.24
kg
0.58
0.60
0.62
0.56
Steel with hardened work surfaces.
Zinc-plated exposed surfaces. O-rings and polyester elastomer back-ups standard.


Ported Body:
Weight: 0.57 kg.
(1.25 lbs.) Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies required for operation over 207 bar (3000 psi). See page 8.016.1_2w.
  ORDERING CHART:

RVCV56-20 Ordering Chart

Selection guide - similar valves.
PDF file of this page. Request a quote.