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Bermad Model 700 - Large Diameter Valve

The BERMAD 700 Series large size control valves are hydraulically operated, diaphragm actuated type. Unique hydro-dynamic globe valve design with a special open plug provides high flow capabilities. The valves are available in the standard configuration or with an Independent Flow Check code “2S”. These valves are designed for large flow applications (On-off valve, pressure reducing, pressure sustaining, pump control, level control, check valve, flow control, burst control, emergency shut-off valve etc.), where precise control is needed.


Features and Options

  • Hydrodynamic wide globe valve body provides:
    - Higher flow (Kv; Cv) than standard globe valves
    - Higher resistance to cavitation damage
  • In-line serviceable
  • Valves are suitable for working with all types of command: Hydraulic, Electric and Pneumatic.
  • Self-operated valves that can work without an external source of power.
  • Wide range of options and accessories:
    - One-way or two-way flow direction
    - V-Port (optional)
    - Cavitation cage (optional)
    - Visual position indicator
    - Limit switches
    - Analog opening output
    - Large selection of control accessories
    - Double chamber actuation (700-M6)
    - Large inspection and service ports (700-M5L)

Technical Data

Valve Pattern: Globe

Size Range: DN 500-1200; 20”-48”

Pressure Rating: PN10, 16 & 25 ANSI Class #150; ANSI Class #300 (Consult Factory)

End Connections: Flanged

Temperature: Water up to 80°C; 180°F

Coating: Fusion Bonded Epoxy, RAL 5005 (Blue) certified for drinking water applications, outside UV protection

Valve Plugs Characteristics

Kv; Cv to Valve Travel Graph

Differential Pressure & Flow Calculation

Flow Charts

Dimensions Tables

Material Specifications 700-M5 / 700-M5L

Material Specifications 700-M6

Independent Check Feature

Additional feature code 2S

The Independent Check Feature is an integral, lift type, non slam check mechanism that opens to allow flow in the required direction and smoothly closes drip tight to prevent back flow.

The Independent Check Feature is used on various system applications such as:

  • Pump control valves
  • One-way level control valves
  • One-way zone backup valves
  • Pressure regulating valves

Principal of Operation

Closed Valve

Closed Valve

Line pressure applied to the upper control chamber of the valve creates a superior force that moves the valve to the closed position and provides drip tight sealing.

Fully Open Valve

Fully Open Valve

Discharging the pressure from the upper control chamber to atmosphere or some other lower pressure zone, causes the line pressure acting on the seal disk to move the valve to the open position.

Independent Check Closed

Independent Check Closed

The independent seal disc assembly closes as soon as differential pressure force across the valve is lower than the valve plug weight, preventing reverse flow through the valve regardless of control chamber pressure and the position of the diaphragm.

PDF Datasheets

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Engineering Data*

2D CAD Drawing

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Engineering Data*
* Note: For some products Manual or Engineering Data are available only upon request.

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Product code

Bermad Model 700 - Large Diameter Valve

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