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 100C (-40 to 212F) with Buna seals;
   -26 to 204C (-15 to 400F) with Fluorocarbon seals;
   -54 to 104C (-65 to 225F) 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.