Diaphragm valve WW-790-M

hydraulicfor controladjustment

Overview
Hydraulically operated, diaphragm-actuated burst control valve that detects excessive flow levels. When flow exceeds the set threshold the valve closes and latches drip-tight until manually reset. Under normal flow conditions the valve remains fully open to minimize head loss. A mechanical flow stem allows precise limitation of the valve opening stroke to set the permitted flow.

Key Features & Benefits

• Excellent anti-cavitation performance
• Wide operating flow range
• High stability and flow accuracy
• Drip-tight sealing when latched
• Unobstructed flow passage
• In-line serviceable for straightforward maintenance
• Certified to functional and drinking water standards: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081

Design & Operation

• Double-chamber actuator design for moderated valve reaction
• Protected/isolated diaphragm
• Optional capability to operate at very low inlet pressure
• Moderated closing curve to ensure controlled shut-off
• Optional V-Port throttling plug for stable low-flow control
• Mechanical flow stem to precisely limit opening stroke and set allowed flow

Typical Applications

• Old or sensitive pipe networks to prevent flooding and reduce water loss
• Reservoir management and level/flow control in distribution systems
• Municipal waterworks, water treatment and desalination, industrial/mining supply systems

Technical specifications

• Model: 790-M
• Series: 700 Sigma
• Type: Burst control valve / excessive flow control
• Actuation: Hydraulically operated, diaphragm actuated
• Special feature: Mechanical flow stem for limiting valve opening stroke
• Design: Double-chamber actuator (unitized actuator options available)
• Options: V-Port throttling plug, various actuator/indicator/position feedback options
• Serviceability: In-line serviceable actuator for easy maintenance
• Materials: Corrosion-resistant materials suitable for demanding environments
• Certifications: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 (and other regional approvals)
• Segment: Waterworks