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Bermad - Model 420-X 3 Way Pressure Reducing Valve

Deeco - Bermad - 420-3W - 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-X 3 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 and opens fully upon line pressure drop.

Features and Benefits

  • 3-Way Hydraulically Actuated Pressure Reducing Valve
    • Protects downstream systems
    • Opens fully upon line pressure drop
  • 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 - 420-3W - Features and Benefits

1. BERMAD Model IR-420-XZ 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
  • Systems Subject to Varying Supply Pressure
  • Energy Saving Irrigation Systems
  • Downhill Supply Lines
  • Pressure Zoning
  • System Maintenance Savings

Technical Data


Bermad - 420-3W - Operation

The Pressure Reducing Pilot [1] senses Downstream Pressure [P2]. It diverts line pressure into the Control Chamber [2] should [P2] rise above the 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 into the atmosphere when [P2] falls below the setting, thereby causing the Valve to open. Should line pressure remain below setting - the Valve opens fully. The Manual Selector [2] enables local 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 - 420-3W - End Connections

Bermad - 420-3W - 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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