Bermad - Model 700 - Large Diameter Valve

The BERMAD 700 Series large-size control valves are hydraulically operated, and 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
  • Large inspection and service ports (700-M5M, 700-M5L)

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 backflow.

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

Principle of Operation

Main Valve

Valve Pattern: Globe

Size Range: DN 500-1200

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

End Connections: Flanged

Temperature: Water up to 60°C, for Cold water applications

Coating: Fusion Bonded Epoxy, dark blue, certified for drinking water applications, outside UV protection

Valve Plugs Characteristics

Kv;Cv Valve Travel Graph

Valve Travel

Flow Factors

Differential Pressure & Flow Calculation

Valve flow coefficient, Kv = Q √Gf/ ∆P

Where:

Kv = Valve flow coefficient (flow in m3/h at 1bar ∆P)

Q = Flow rate (m3 /h)

∆P = Differential pressure (bar)

Gf = Liquid specific gravity (Water = 1.0)

Practical formulas for water:

Q= Kv √∆P

∆P =(Q/Kv)²

Flow Chart

Dimensions Table

Weight and height with cradle

Control Chamber Displacement

Control Ports

Material Specifications 700-M5 / 700-M5M / 700-M5L