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Bermad - Model 430-X 3 Way Pressure Relief / Sustaining Valve

Deeco - Bermad - 430-3W - 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 430-X 3 Way Pressure Relief/Sustaining Valve is a hydraulically operated, diaphragm-actuated control valve that it sustains minimum preset upstream (back) pressure regardless of fluctuating flow or varying downstream pressure.

Features and Benefits

  • 3-Way Hydraulic Actuated Pressure Sustaining Valve
    • Controls system fill-up
    • Sustains upstream line pressure
    • Opens fully upon line pressure rise
    • Prioritizes pressure zones
  • Advanced Globe Hydro-Efficient Design
    • Unobstructed flow path
    • Single moving part
    • High flow capacity
  • Fully Supported & Balanced Diaphragm
    • Requires low opening and 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

Bermad - 430-3W - Features and Benefits

Pressure Sustaining Valve

1. BERMAD Model IR-430-XZ protects the pump from overload and cavitation, prevents
main line emptying, and controls system fill-up

2. BERMAD Check Valve Model 70N

Typical Applications

  • Downhill Supply Lines Emptying Prevention
  • Systems Subject to Varying Supply Pressure
  • Energy Saving Irrigation Systems
  • Pressure Zone Prioritizing
  • Line Fill-Up Control
  • Pump Overload and Cavitation Protection

Technical Data


Bermad - 430-3W - Operation

The Pressure Sustaining Pilot [1] senses Upstream Pressure [P1] and diverts line pressure into the Control Chamber [2] should [P1] drops below the setting. Pressure then accumulates in the control chamber causing the Valve to throttle closed, increasing [P1] to the pilot setting. The pilot releases accumulated pressure into the atmosphere when [P1] rises above the setting, thereby causing the Valve to open. Should line pressure remains above setting - the Valve opens fully. The Manual Selector [3] enables local manual closing

* Sustaining (In-Line) Valve Pilot should be set to the minimum system pressure allowed. The relief (Circulation) Valve Pilot should be set slightly above the system working pressure


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 Ratings

  • 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 - 430-3W - End Connections

Bermad - 430-3W - 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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