Pressure Control Valves

RV08-20 — Relief, Direct-Acting, Poppet-Type Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for RV08-20.
  Request a quote.

RV08-20 Valve

RV08-20 Valve symbol

A screw-in, cartridge-style, direct-acting, poppet-type, hydraulic relief valve
intended for lower flow circuits requiring low internal leakage.

The RV08-20 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the
spring-opposed poppet from its seat.
Note: The RV08-20 may be used in cross-over relief applications (back pressure on 2)
with the use of the "C" double back-up ring seal option. See ordering options below.

• Adjustments cannot be backed out of the valve.
• Variety of pressure adjustment options including non-adjustable factory pre-set.
• Adjustments options A, B, and C: positive stops prevent springs from going solid.
• Optional spring ranges to 248 bar (3600 psi).
• Rapid response to pressure changes.
• Optional bi-directional pressure (requires bi-directional pressure seal option).
• Compact size.

Operating Pressure: 275.8 bar (4000 psi)
Proof Pressure: 482.6 bar (7000 psi)
Burst Pressure: 896.3 bar (13000 psi)
Flow: 22.7 lpm (6 gpm) maximum
Internal Leakage: 0.25 ml/minute (5 drops/minute) max. to 75% of nominal setting
Relief Pressure Setting Defined: bar (psi) evident at 0.95 lpm (0.25 gpm) attained
Reseat Pressure: Nominal 80% of crack pressure
Standard Spring Ranges: 3.4 to 248.2 bar (50 to 3600 psi)
   Shown in To Order section. Due to manufacturing tolerances, it may be possible to
   adjust the valve either lower or higher than the nominal ratings shown. If the valve is
   adjusted beyond the recommended maximum pressure range for F and H style
   adjuster options, the valve may not open to relieve pressure.

Spring Pressure/Turn
Pressure Adjustment Options
A, B, C and L
Options F and H
-5 6 bar/86 psi 7.4 bar/107 psi
-9 11 bar/162 psi 14 bar/203 psi
-18 21.4 bar/310 psi 26.7 bar/387 psi
-33 39 bar/565 psi 48.7 bar/706 psi
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 107° C (-65 to 225° F) with polyurethane and urethane 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_2w
Cavity Tool: CT08-2xx; See page 8.600.1
Seal Kit: SK08-2x-B; or SK08-2x-M (for cross-over relief application); See page 8.650.1


RV08-20 Flow-Pressure

RV08-20 Valve Dimensions


Cartridge: Weight: 0.16 kg (0.35 lb) to 0.22 kg (0.47 lb) depending on adjustment option. Steel with hardened work surfaces. Zinc-plated exposed surfaces. Buna N O-rings standard. Anodized aluminum knobs and caps.

Standard Ported Body:
Weight: 0.16 kg (0.35 lb); Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies available; dimensions may differ. See page 8.008_2w.

Adjustment Option Details:
See page 6.003.1

RV08-20 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for RV08-20 Request a quote.