PRESSURE CONTROLS
RV58-20 Relief, Direct-Acting Poppet, High Pressure
DESCRIPTION
A screw-in, cartridge-style, direct-acting, poppet-type, hydraulic relief valve intended
for lower flow circuits requiring low internal leakage at higher pressures.
OPERATION
The RV58-20 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force
the spring-opposed poppet from its seat.
Note: The RV58-20 may not be used in cross-over relief applications (back pressure
on 2).
FEATURES
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Rapid response to pressure changes.
• Compact size.
RATINGS
Operating Pressure: 345 bar (5000 psi)
Flow: See Performance Chart
Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 75% of nominal setting
Crack Pressure Defined: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Reseat Pressure: Nominal 80% of crack pressure
Standard Spring Range: 55.2 to 317.2 bar (800 to 4600 psi)
Operating Temperature: -54 to 107°C with standard 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: VC08-2; See page 9.108.1
Cavity Tool: CT08-2XX; See page 8.600.1
Seal Kit: SK58-2X-B; See page 8.650.1
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
6.015.1
276/4000
207/3000
138/2000
69/1000
11.4
3
22.7
6
FLOW lpm/gpm
PRESSURE RISE bar/psi
Flow Characteristic
32 cSt/150 sus oil at 40°C
345/5000
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DIMENSIONS
MATERIALS
Cartridge: Weight: 0.23 kg. (0.50 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Polyurethane O-rings and back-up
standard. Anodized aluminum
knobs and caps.
Ported Body: Weight: 0.54 kg.
(1.20 lbs.); Ductile Iron (code "D")
standard, consult factory for
weight, dimensions may differ.
Rated to 345 bar (5000 psi).
See page 8.008.1.
TO ORDER
RV58-20
__ - __ __ __ - __ - __ __ / __ __ __ __
Setting in bar
†
(Blank) for Adjustable, or
Specify, for example:
M275 275 bar
Setting in psi
†
(Blank) for Adjustable, or
Specify, for example:
40.1 4010 psi
Spring Range
46 55.2 to 317.2 bar
(800 to 4600 psi)
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A w/ Cover Cap C
Factory Preset Non-Adj. F
Factory Preset
Hidden Adj. H
Option C w/
Lockwire Holes L
Seals
Pressure on
P Only:
P Polyurethane
(Std.)
RV58-20
6.015.2
4 6
Porting
Cartridge Only 0
SAE 6 6TD
SAE 8 8TD
1/4 in. BSP* 2BD
3/8 in. BSP* 3BD
†
Adjustable valves will be
preset to approx. 50% of
spring max. potential.
*BSP Body; U.K. Mfr. Only
®
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