Diaphragm valve WW-790-M

hydraulically-operatedregulatingfor water

Overview
Hydraulically operated, diaphragm actuated burst control valve that senses flow levels. When it senses flow in excess of settings, it shuts off and locks drip tight until manually reset. As long as flow is lower than settings, the valve remains fully open, minimizing head loss. A mechanical flow stem enables limiting valve opening stroke, precisely adjusting the required flow through the valve.

Key Features & Benefits

• Designed for demanding 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 at very low pressure
  • Moderated closing curve
• Flexible design — easy addition of options
• Obstacle-free flow passage
• V-Port throttling plug (optional) — very stable at low flow
• In-line serviceable — simplified maintenance
• Certified to functional and drinking water standards: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 and others

Typical Applications

• Old or sensitive pipe systems — prevents flooding and reduces water loss

How 790-M is used
Reliable, efficient level and flow control for reservoir management and water distribution systems.

Related Series & Options
Part of the 700 Sigma Series with options such as V-Port plug, double-chamber actuator and various actuator/position-indication accessories. Series-level documentation and spare-parts information are available for selection of sizes and variants.

Characteristics / Technical specifications

• Model: 790-M
• Series: 700 Sigma Series
• Operation: Hydraulically operated, diaphragm actuated
• Function: Excessive flow / burst control (senses excessive flow and shuts off, locks until manual reset)
• Flow control: Mechanical flow stem for limiting opening stroke and precise flow adjustment
• Design: Double-chamber option, obstacle-free flow passage
• Optional components: V-Port throttling plug (stable low-flow option), actuator and position-indication accessories
• Serviceability: In-line serviceable for easy maintenance
• Performance: Wide flow range, high stability and accuracy, excellent anti-cavitation properties, drip-tight sealing
• Low-pressure operation: Optional operation in very low pressure
• Standards & Certifications: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 and others
• Typical sectors: Waterworks, reservoirs, municipal networks, water treatment / desalination, mining / industrial