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Bermad - Model 420 - 2 Way Pressure Reducing Valve

Deeco - Bermad - 420-2W - Product Image.
Brand: Bermad
Category: Control Valves, 400 Series
Size Range:



40-80mm - Female Threaded BSP

80-300mm - Flanged

Engineering Data:

Bermad - Model 400 - Engineering Data

Product Description

The BERMAD Model 420-2 Way Pressure Reducing Valve is a hydraulically operated, diaphragm-actuated control valve that reduces higher upstream pressure to lower constant downstream pressure regardless of fluctuating demand or varying upstream pressure.

Features and Benefits

  • Line Pressure Driven Pressure Reducing Valve
    • Protects downstream systems
  • Advanced Globe Hydro-Efficient Design
    • Unobstructed flow path
    • Single moving part
    • High flow capacity
  • Fully Supported & Balanced Diaphragm
    • Requires low actuation pressure
    • Excellent low-flow regulation performance
    • Progressively restrains valve closing
    • Prevents diaphragm distortion
  • User-Friendly Design
    • Easy pressure setting
    • Simple in-line inspection and service
    • Easy addition of control features
Bermad - 420-2W - Features and Benefits

1. BERMAD Model IR-420 reduces line pressure, protecting downhill line and

2. BERMAD Pressure Relief Valve Model 73Q

3. BERMAD Strainer Model 70F

Typical Applications

  • Pressure Reducing Stations
  • Flow and Leakage Reduction
  • Cavitation Damage Protection
  • Pressure Zoning
  • Downhill Supply Lines
  • System Maintenance Savings

Technical Data


Bermad - 420-2W - Operation

The Needle Valve [1] continuously allows line pressure into the Control Chamber [2]. The Pressure Reducing Pilot [3] senses Downstream Pressure [P2], and throttles when it rises above setting. Pressure then accumulates in the control chamber causing the Valve to throttle closed, decreasing [P2] to the pilot setting. The pilot releases accumulated pressure when [P2] falls below the setting, thereby causing the Valve to modulate open. The needle valve controls the closing speed. The Downstream Cock Valve [4] enables manual closing


Body and Cover

  • Polyester Coated Cast or (DN250 and larger) Ductile Iron


  • Stainless Steel


  • Nylon fabric Reinforced NR with rugged insert

Bolts, Studs, and Nuts

  • Zinc-Cobalt plated Steel

Control Accessories

  • Brass

Tubing and Fittings

  • Reinforced Plastic and Brass

Pressure Rating

  • 16 bar

Operating Pressure Range

  • 0.5-16 bar

For lower pressure requirements, consult Deeco.

Setting Range

  • 1.5-16 bar

Setting ranges vary according to specific pilot springs. Please consult Deeco.

Patterns and Sizes

  • Globe: DN80-400
  • Angle: DN80-100

End Connections

  • 40-80mm - Female Threaded BSP
  • 80-400mm - Flanged
Bermad - 420-2W - End Connections

Bermad - 420-2W - End Connections

Technical Specifications

For technical specifications (Flow charts, valve characteristics, dimensions, etc.) - Please refer to the Engineering Data:

Bermad - Model 400 - Engineering Data

Due to the wide range of options available and criteria for correct model selection, pricing and configuration are available on application only.

Please consult with Deeco engineers for more information.

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