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Bermad Model 420 - 2 way Pressure Reducing Valve

The BERMAD Model IR-420 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

[1] BERMAD Model IR-420 reduces line pressure,protecting downhill line and consumers.
[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 Specifications

Dimensions and Weights

Bermad Model 420 - 2 Way Pressure Reducing Valve - Dimensions and Weights

Technical Data

Patterns and Sizes: Globe: 3-16”; DN80-400 Angle: 3-4”; DN80-100

End Connections:

Pressure Rating: 16 bar; 232 psi

Operating Pressure Range: 0.5-16 bar; 7-232 psi

For lower pressure requirements, please contact us.

Setting Range: 1.5-16 bar; 22-232 psi

Setting ranges vary according to specific pilot spring. For more information please contact us.


Body and Cover:

Polyester Coated Cast or (10”; DN250 and larger) Ductile Iron

Spring: Stainless Steel

Diaphragm: 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

Flow Chart

Bermad Model 420 - 2 Way Pressure reducing valve - Flow Chart


Bermad Model 420 - 2 Way Pressure reducing valve - 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 pilot setting. The pilot releases accumulated pressure when [P2] falls below setting, thereby causing the Valve to modulate open. The needle valve controls the closing speed. The Downstream Cock Valve [4] enables manual closing.

How to Order

Please specify the requested valve in the following sequence: (for more options, please contact us.)

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Engineering Data*
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Product code

Bermad Model 420 - 2 way Pressure Reducing Valve

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