Pressure Control Valves

RVD50-20P — Relief, Direct-Acting, Poppet, High Pressure Valve
  Valve Features and Benefits.
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RVD50-20P Valve

European Commission (EC) Pressure Equipment Directive PED 97/23/EC

SYMBOL:
RVD50-20P Valve symbol

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
Operating Pressure: 385 bar (5575 psi) maximum
Proof Pressure: 517.1 bar (7500 psi)
Burst Pressure: 1379 bar (20000 psi)
Flow: Port 1 to 2: 113.6 lpm (30 U.S. gpm) at max pressure.
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 ml/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.
Temperature: -40°C to 100°C (-40°F to 212°F) with Buna N seals;
   -26°C to 204°C (-15°F to 400°F) with Fluorocarbon seals;
   -54°C to 107°C (-65°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 and stamped parameters on the side of the valve remain visible when installed. 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. Pressure setting is factory-set and non-adjustable. Pressure setting must NOT be changed in the field. If the HF-stamped epoxy plug on the top of the valve is missing, the valve setting may have been tampered with and the valve must be replaced. For additional installation instructions; See page 9.020.1
Cavity: VC10-2; See page 9.110_2w
Cavity Tool: CT10-2xx; See page 8.600.1
Seal Kit: SK10-2x-B; See page 8.650.1

PERFORMANCE:

RVD50-20P Performance Chart

  DIMENSIONS:
RVD50-20P Valve 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 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile iron bodies available; dimensions
may differ. See page 8.010_2w.
  ORDERING CHART:

RVD50-20P Ordering Chart

Valve Features and Benefits. Selection guide - similar valves.
PDF file of this page. Request a quote.