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Bermad - Model 123-X - Pressure Reducing / Sustaining Valve

Bermad -123 - Product Image
Brand: Bermad
Category: Control Valves, 100 Series
Size Range:



40-80mm - Female Threaded BSP

80-150mm - Flanged

Engineering Data:

Bermad - Model 105 - Basic Hydraulic Valve

Product Description

The BERMAD Model 123-X is a hydraulically operated, diaphragm-actuated control valve that sustains minimum preset upstream (back) pressure and reduces downstream pressure to a constant preset maximum.

Features and Benefits

  • Line Pressure Driven, Hydraulically Controlled
    • Protects downstream system
    • Prioritizes pressure zones
    • Controls system fill-up
  • Engineered Plastic Valve with Industrial Grade Design
    • Highly durable, chemical and cavitation resistant
    • No internal bolts and nuts
  • hYflow ‘Y’ Valve Body with "Look Through" Design
    • Ultra-high flow capacity –Low-pressure loss
  • Unitized Flexible Super Travel (FST) Diaphragm and Guided Plug
    • Accurate and stable regulation with the smooth closing
    • Requires low opening and actuation pressure
    • Prevents diaphragm erosion and distortion
  • User-Friendly Design
    • Easy pressure setting
    • Simple in-line inspection and service

Bermad - 123 - Features and Benefits

1. BERMAD Model IR-123-XZ sustains supply system pressure, and establishes reduced higher pressure zone

2. BERMAD Solenoid Controlled Valve Model 210-N1

3. BERMAD Pressure Reducer Model 1 /2-PRV

4. BERMAD Vacuum Breaker Model ½"-ARV

Typical Applications

  • Line Fill-Up Control Solutions
  • Line Emptying Prevention
  • Pressure Reducing Systems
  • Infield Filter Backwash Pressure Sustaining
  • Energy Saving Irrigation Systems

Technical Data


Bermad - 123 - Operation

The Pressure Reducing Pilot (PRP) [1] is hydraulically connected to the Valve Control Chamber [2] through the Pressure Sustaining Pilot (PSP) [3]. The PSP commands the Valve to throttle closed should Upstream Pressure [P1] drops below the setting. When [P1] rises above the setting, the PSP switches and allows the PRP to control the Valve, commanding it to reduce Downstream Pressure [P2]. The Manual Selector [4] enables local manual closing


Body, Cover and Plug

  • Glass-Filled Nylon


  • NR, Nylon Fabric Reinforced


  • NR


  • Stainless Steel

Cover Bolts

  • Stainless Steel

Control Accessories

  • Plastic

Tubing and Fittings

  • Plastic

Valve Configurations & Size

  • Oblique: DN50, 65, 80, 80L, 100 & 150
  • Angle: DN80

End Connections

40-80mm - Female Threaded BSP

80-150mm - Flanged

Pressure Rating

  • 10 bar.

Operating Pressure Range

  • 0.35-10 bar.

Setting Range

  • 1-7 bar.

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

Flow Chart

Bermad - 123 - Flow Chart

Bermad - 123 - Flow Chart

Technical Specifications

Dimensions and Weights

Bermad - 120 -3 Way - Technical Specifications
Bermad - 120-3 Way - Dimensions and Weights 1
Bermad - 120-3 Way - Dimensions and Weights 2

CCDV = Control Chamber Displacement Volume • BSP.T = Internal Threaded • BSP.F = External Threaded • Other End Connections are available on request. For dimensions and weights of adapters or valve with adapters please consult with customer service

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.

Bermad Model 100 Series - How to Order Guide
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