PRESSURE CONTROLS

RVD50-20P Relief, Poppet-Type, High Pressure

DESCRIPTION

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

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

The RVD50-20P is suitable for use as a safety accessory in Category IV Group 2

applications according to the European Commission (EC) Pressure Equipment

Directive (PED) 97/23/EC.

OPERATION

The RVD50-20P blocks flow from 1 to 2 until sufficient pressure is present at 1 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.

FEATURES

• PED-Certified to European Commission Pressure Equipment Directive 97/23/EC.

• Suitable for use as a safety accessory in PED Category IV Group 2 applications.

• Salt spray protection to meet 1000 hour specifications.

• Hardened poppet and cage for long life.

• No maintenance required (or allowed).

• Rapid response to pressure surges.

• Industry common cavity.

• Spring ranges from 13.7 bar (200 psi) to 350 bar (5075 psi).

• Poppet developed using computational fluid dynamics to ensure dynamic response

with minimal friction.

RATINGS

Maximum Operating Pressure: 385 bar (5575 psi)

Proof Pressure: 517.1 bar (7500 psi)

Burst Pressure: 1379 bar (20000 psi)

Flow: The Performance Chart illustrates flow handling capacity at maximum setting

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

with setting within range due to flow forces. Consult factory for specific flow

characteristic values.

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

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

Reseat Pressure: Nominal 85% of crack pressure

Standard Spring Ranges: Available from 13.7 bar (200 psi) to 350 bar (5075 psi).

See To Order section. Due to manufacturing tolerances, it may be possible to

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

Operating Temperature: -40°C to 100°C (-40°F to 212°F) with Buna N seals;

-26°C to 204°C (-31°F to 400°F) with Fluorocarbon seals;

-40°C to 107°C (-40°F to 225°F) 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: Valve must be installed so that pressure is at port 1. Improper porting

will result in loss of safety function of valve. Pressure at port 2 must be at 0 bar

(0 psi) for valve to open at the marked pressure setting. Pressure at port 2 is

additive to the pressure setting. For additional installation instructions;

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.

ISO SYMBOL

PERFORMANCE

(Cartridge Only)

6.023.3

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

European

Commission

(EC)

Pressure

Equipment

Directive

PED 97/23/EC

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.

Standard Ported Body: Weight:

0.16 kg. (0.35 lbs.) Anodized high-

strength aluminum alloy rated to 207

bar (3000 psi). Ductile iron bodies

available; dimensions may differ.

See page 8.010.1

TO ORDER

Pressure Setting

Specify, for example:

M210 210 bar

30 3000 psi

Porting

Cartridge Only 0

SAE 6 6T

SAE 6 6TD

SAE 8 8T

SAE 8 8TD

1/4 in. BSP* 2B

1/4 in. BSP* 2BD

3/8 in. BSP* 3B

1/4 in. BSP* 3BD

1/2 in. BSP* 4B

1/4 in. BSP* 4BD

*BSP Body; U.K. Mfr. Only

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

Seals

Pressure on

Port 1 Only:

N Buna N (Std.)

V Fluorocarbon

*P Polyurethane

*Note: Polyurethane

seals are recommended

for operation over 241

bar (3500 psi).

RVD50-20P

6.023.4

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 350 bar

(4000 to 5075 psi)

HYDRAFORCE

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1.70

43.1

1.35

34.3

TORQUE:

46 – 54 ft-lbs

62.6 – 73.4 Nm

PED-certiﬁ ed as Safety Accessory

Blue rectangles are links to other catalog pages.