DESCRIPTION

A screw-in, cartridge-style, direct-acting, poppet-type, hydraulic relief valve intended

for stable function in very low ﬂ ow circuits that control pilot-operated valves.

OPERATION

The RV08-29 blocks ﬂ ow from ➀ to ➁ until sufﬁ cient pressure is present at ➀ to force

the spring-opposed poppet from its seat.

FEATURES

• Adjustments cannot be backed out of the valve.

• Hardened poppet and cage for long life.

• Optional spring ranges to 241 bar (3500 psi).

• Smooth response to pressure surges.

• Industry common cavity.

• Compact size.

RATINGS

Operating Pressure: 241 bar (3500 psi)

Flow: Up to 1.89 lpm (0.5 gpm); see performance curve.

Internal Leakage: 3 ml/minute (0.18 cu. in./minute) max. to 80% of nominal setting

Crack Pressure Deﬁ ned: bar (psi) evident at 0.95 lpm (0.25 gpm) attained

Reseat Pressure: Nominal 80% of crack pressure

Temperature: -40° to 100°C with standard Buna seals;

-26° to 204°C with Fluorocarbon seals; -54° to 104°C 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: VC08-2; See page 9.108.1

Cavity Tool: CT08-2XX; See page 8.600.1

Seal Kit: SK08-2X-B; See page 8.650.1

PRESSURE CONTROLS

RV08-29 Relief, Direct-Acting Poppet

USASI/ISO:

SYMBOLS

6.176.1

276/4000

207/3000

138/2000

69/1000

0.76

0.2

1.14

0.3

1.51

0.4

0.38

0.1

1.89

0.5

FLOW lpm/gpm

PRESSURE RISE bar/psi

Flow Characteristic

32 cSt/150 sus oil at 40°C

HYDRAFORCE

.com

PERFORMANCE (Cartridge Only)

Blue rectangles are links to other catalog pages.

DIMENSIONS

MATERIALS

Cartridge: Weight: 0.23 kg. (0.50 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and back-up

standard. Anodized aluminum

knobs and caps.

Standard Ported Body: Weight:

0.16 kg. (0.35 lbs.); Anodized high-

strength 6061 T6 aluminum alloy,

rated to 207 bar (3000 psi). Ductile

iron bodies available; dimensions

may differ. See page 8.008.1

TO ORDER

RV08-29

__ - __ __ __ - __ - __ __ / __ __ __ __

Setting in bar

†

(Blank) for Adjustable, or

Specify, for example:

M185 185 bar

Setting in psi

†

(Blank) for Adjustable, or

Specify, for example:

30.0 3000 psi

Porting

Cartridge Only 0

SAE 4 4T

SAE 6 6T

1/4 in. BSP* 2B

3/8 in. BSP* 3B

*BSP Body; U.K. Mfr. Only

†

Adjustable valves will be

preset to approx. 50% of

spring max. potential.

Seals

N Buna N (Std.)

V Fluorocarbon

P Polyurethane

RV08-29

6.176.2

HYDRAFORCE

.com

Adjustment Range

35 69 to 241 bar

(1000 to 3500 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

Blue rectangles are links to other catalog pages.