PRESSURE CONTROLS

RVD50-20 Relief, Poppet-Type, High Pressure

DESCRIPTION

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

for use as a pressure limiting device for common hydraulic circuit protection.

OPERATION

The RVD50-20 blocks ﬂ ow from ➀ to ➁ until sufﬁ cient pressure is present at ➀ to

force the poppet from its seat.

The cartridge offers fast response to load changes in typical hydraulic circuits

requiring low hysteresis, low pressure rise and low internal leakage.

For cross-over applications, maximum recommended ﬂ ow is 37.9 lpm (10 gpm)

and maximum pressure is 207 bar (3000 psi). See Ordering Table.

FEATURES

• Adjustments cannot be backed out of the valve.

• Height of the adjuster does not change when the pressure setting is adjusted.

• Adjustment options A, B, and C: positive stops prevent springs from going solid.

• Hardened poppet and cage for long life.

• Optional spring ranges to 345 bar (5000 psi).

• Rapid response to pressure surges.

• Industry common cavity.

RATINGS

Maximum Operating Pressure: 350 bar (5075 psi)

Flow: The Performance Chart illustrates ﬂ ow handling capacity at maximum setting

for each spring range option. Pressure rise will vary with spring (range) and

with setting within range due to ﬂ ow forces. Consult factory for speciﬁ c ﬂ ow

characteristic values.

Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 80% of nominal setting

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

Reseat Pressure: Nominal 85% of crack pressure

Standard Spring Ranges: Due to manufacturing tolerances, it may be possible to

adjust the valve either lower or higher than the nominal ratings shown below.

Model Code 08: 13.7 bar to 58.6 bar (200 psi to 850 psi)

Model Code 15: 41.4 bar to 103. 4 bar (600 psi to 1500 psi)

Model Code 24: 96.5 bar to 165.5 bar (1400 psi to 2400 psi)

Model Code 32: 137.9 bar to 220.6 bar (2000 psi to 3200 psi)

Model Code 42: 206.8 bar to 289.6 bar (3000 psi to 4200 psi)

Model Code 50: 275.8 bar to 344.7 bar (4000 psi to 5000 psi)

Storage Temperature: -40°C to 120°C with standard Buna N seals

-35°C to 204°C with Fluorocarbon seals

-54°C to 107°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: VC10-2; See page 9.110.1

Cavity Tool: CT10-2XX; See page 8.600.1

Seal Kit: SK10-2X-B; See page 8.650.1;

SK10-2X-M for cross-over relief application – max. pressure 207 bar (3000 psi)

USASI/ISO:

SYMBOLS

PERFORMANCE

(Cartridge Only)

6.023.1

HYDRAFORCE

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207/3000

172/2500

138/2000

103/1500

69/1000

114

FLOW RATE lpm/gpm

DIFFERENTIAL PRESSURE bar/psi

Differential Relief Pressure vs. Flow

32 cSt/150 sus oil at 40°C

35/500

241/3500

276/4000

310/4500

345/5000

379/5500

Spring Option 24

Spring Option 15

Spring Option 08

Spring Option 32

Spring Option 50

Spring Option 42

Blue rectangles are links to other catalog pages.

DIMENSIONS

MATERIALS

Cartridge: Weight: 0.25 kg. (0.56 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-up standard;

Anodized aluminum knobs.

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 8.010.1

TO ORDER

Setting in bar

†

(Blank) for Adjustable, or

Specify, for example:

M25 25 bar

M100 100 bar

Setting in psi

†

(Blank) for Adjustable, or

Specify, for example:

9.0 900 psi

23.5 2350 psi

Porting

Cartridge Only 0

SAE 6 6T

SAE 8 8T

1/4 in. BSP* 2B

3/8 in. BSP* 3B

1/2 in. BSP* 4B

*BSP Body; U.K. Mfr. Only

†

Adjustable valves will be preset

to approx. 50% of spring max.

*See page 6.003.1 for ‘A-Alt’

Fixed Height Adjuster details.

RVD50-20__ - __ __ __ - __ - __ __ / __ __ __ __

Adjustment Option

*Fixed Height Adjuster

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 Adjustment H

Option C

w/Lockwire Holes L

Seals

Pressure on

P Only:

N Buna N (Std.)

V Fluorocarbon

P Polyurethane

Bidirectional

Pressure:

NC Buna N

VC Fluorocarbon

PC Polyurethane

RVD50-20

6.023.2

Spring Range

08 13.7 to 58.6 bar

(200 to 850 psi)

15 41.4 to 103.4 bar

(600 to 1500 psi)

24 96.5 to 165.5 bar

(1400 to 2400 psi)

32 137.9 to 220.6 bar

(2000 to 3200 psi)

42 206.8 to 289.6 bar

(3000 to 4200 psi)

50 275.8 to 344.7 bar

(4000 to 5000 psi)

HYDRAFORCE

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2.36

60.0

2.98

75.7

1.70

43.1

Option A

Option B

Knob Dia.

Options C or L

Options F or H

TORQUE:

46 – 54 ft-lbs

62.6 – 73.4 Nm

ORIFICE DISCS SHOULD NOT

BE USED WITH THIS VALVE.

1.35

34.3

Blue rectangles are links to other catalog pages.