Bermad - Model 750-80 - Level Control Valve

A hydraulically operated control valve that controls reservoir filling and reservoir level. The valve shuts off at a pre-set reservoir high level and fully opens in response to an approximately one meter (3 ft) level drop, as sensed by the 3-Way altitude pilot mounted on the main valve. BERMAD 700 SIGMA EN/ES series valves are hydraulic, oblique pattern, globe valves with a raised seat assembly and double chamber unitized actuator, that can be disassembled from the body as a separate integral unit. The valve's hydrodynamic body is designed for an unobstructed flow path and provides excellent and highly effective modulation capacity for high differential pressure applications. The valves are available in the standard configuration or with an Independent Check Feature code “2S”. The 700 SIGMA EN/ES Valves operate under difficult operation conditions with minimal cavitation and noise. They meet th size and dimensions requirements of various standards

Features and Benefits

• Designed to - stand up to the toughest conditions
  • Excellent anti-cavitation properties
  • Wide flow range
  • High stability and accuracy
  • Drip tight sealing
• Double chamber design
  • Moderated valve reaction
  • Protected diaphragm
  • Optional operation in very low pressure
  • Moderated closing curve
• Flexible design - Easy addition of features
• Obstacle-free flow pass
• V-Port Throttling Plug (Optional) - Very stable at low flow
• Compatible with various standards
• High-quality materials
• In-line serviceable - Easy maintenance

Major Additional Features

• Modulating altitude control – 750-82
• Pressure sustaining – 753-80-X
• Flow control – 757-80-XU
• Bi-directional flow – 750-87-X
• Full powered opening & closing – 750-80-BX
• Closing surge prevention – 750-80-49-X
• Bi-level altitude control – 750-86
• Level sustaining with high sensitivity pilot – 75A-83
• Independent Check Feature – 750-80-2S

Typical Installation

Operation

Main Valve

Valve Patterns: “Y” (Globe)

Size Range: 50-600mm

Pressure Rating: 16 bar - with higher pressure options available.

End Connections:
EN: 50-400mm - Flanged

ES: 65-600mm - Flanged

Plug Types: Flat disc, V-port, Cavitation cage

Temperature Rating: 60°C, for Coldwater applications

Optional higher temperature: Available on request

Standard Materials:

Body & actuator: Ductile Iron

Bolts, nuts & studs: Stainless Steel

Internals: Stainless Steel, Tin Bronze & Coated Steel

Diaphragm: Fabric-reinforced synthetic rubber

Seals: Synthetic rubber

Coating: Dark blue Fusion bonded epoxy

Control System

Standard Materials:

Accessories: Stainless Steel, Bronze & Brass

Tubing: Stainless Steel or Copper

Fittings: Stainless Steel or Brass

Pilot standard materials:

Body & Cover: Brass or Stainless Steel

Elastomers: Synthetic Rubber

Spring: Stainless Steel or Galvanized Steel

Internal Parts: Stainless Steel

Diaphragm Covers: Fusion-bonded, Epoxy Coated Steel or Stainless Steel

Altitude Adjustment Range:

Notes

• Shut-off level repeatability: 100mm.
• Re-opening level: approx. 1m below shut-off level.
• Inlet Pressure, Outlet Pressure, and Flow-rate are required for optimal sizing.
• Recommended maximum flow velocity:6.0 m/sec.
• Minimum operating pressure 0.7 bar. For lower pressure requirements consult Deeco.

For technical specifications (Flow charts, valve characteristics, dimensions, etc.) - Please refer to the Engineering Data:
Bermad - Model 700 - Sigma EN/ES - Engineering Data