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Bermad - Model 43Q - 2 Way Pressure Relief / Sustaining Valve

Bermad - Model 43Q - 2 Way Pressure Relief / Sustaining Valve - Product Image
Brand: Bermad
Category: Control Valves, 400 Series
Size Range:



25-80mm - Female Threaded BSP

80-300mm - Flanged

Engineering Data:

Bermad - Model 400 - Engineering Data

Product Description

The BERMAD Quick Pressure Relief Valve is a hydraulically operated, diaphragm-actuated control valve that relieves excessive line pressure when it rises above the preset maximum. It responds to a rise in system pressure immediately, accurately, drip-tight, and with high repeatability, by opening fully. The BERMAD Model 43Q provides smooth drip tight closing.

Features and Benefits

  • Hydraulic Pressure Control
    • Line pressure driven
    • Long-term drip-tight sealing
    • Long-term setting stability
    • Wide setting range
    • Tight setting window with minimal hysteresis
  • Advanced Globe Hydro-Efficient Design
    • Unobstructed flow path
    • Single moving part
    • High flow capacity
  • Fully Supported & Balanced Diaphragm
    • Requires low opening and actuation pressure
    • Progressively restrains valve closing
    • Prevents diaphragm distortion
  • User-Friendly Design
    • Easy pressure setting

Bermad - 43Q-2W - Features and Benefits

1. BERMAD Model IR-43Q protects the filter and system from overpressure.

2. BERMAD Pressure Reducing Valve Model IR-420-R

3. BERMAD Hydrometer with Solenoid Control Model IR-910-M0-X

4. BERMAD Air Valve Model ARC-A-I-I

Typical Applications

  • System Burst Protection
  • Momentary Pressure Peak Elimination
  • System Failure Visual Indication
  • Filter Burst Protection

Technical Data


Bermad - 43Q-2W - Operation

The Pressure Relief Pilot [1] commands the Valve to open immediately should the Upstream Pressure [P1] abruptly rise above the setting, and to close smoothly when it falls below the setting. The Vented Cock Valve [2] enables manual operating tests.

Pressure Rating

  • 16 bar

Operating Pressure Range

  • 0.5-16 bar

For lower pressure requirements, consult Deeco

Setting Range

  • 1-12 bar

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

Valve Configurations and Sizes

  • Globe: DN40-400
  • Angle: DN50-100

End connections

  • 25-80mm - Female Threaded BSP
  • 80-400mm - Flanged
Bermad - 43Q-2W - End Connections

Bermad - 43Q-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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