Diaphragm valve 770-03-U

hydraulically-operatedpilot-operatedregulating

Product overview
Hydraulically operated flow control valve that maintains a pre-set maximum flow regardless of fluctuating demand or varying system pressure. Equipped with opening and closing speed controls and a double-chamber design to moderate valve reaction and reduce water hammer.

Features & benefits

• Excellent anti-cavitation performance
• Wide flow range for versatile system sizing
• High stability and flow accuracy
• Drip-tight sealing
• Double-chamber design for moderated valve reaction
• Protected diaphragm
• Optional operation at very low inlet pressures
• Moderated closing curve to limit hydraulic shock
• Flexible design for easy addition of options and accessories
• Obstacle-free flow passage to minimize pressure loss and solids buildup
• Optional V-Port throttling plug — stable control at low flows
• High-quality materials suitable for potable and functional water use
• In-line serviceable for simplified maintenance

Typical applications

• Water distribution systems — balancing supply capacity with demand
• HVAC systems — flow limiting to maintain system efficiency
• Filtration systems — precise process flow control in filtration applications

Certifications & standards

• EN-1074
• NSF/ANSI 61-372
• WRAS
• AS 5081
• Other applicable functional and drinking water standards

Characteristics / technical specifications

• Model: 770-03-U
• Series: 700 Sigma Series
• Operation: Hydraulically operated flow control valve with opening and closing speed controls (pilot controlled)
• Function: Maintains pre-set maximum flow irrespective of inlet pressure or demand fluctuations
• Design: Double-chamber design; obstacle-free flow pass
• Throttling option: V-Port throttling plug available for stable low-flow performance (optional)
• Performance: Wide flow range; high stability and accuracy; moderated closing curve; drip-tight sealing
• Materials & construction: High-quality materials; protected diaphragm; suitable for functional and potable water standards
• Maintenance: In-line serviceable for easy maintenance
• Typical uses: Water delivery, HVAC variable-flow systems, filtration process control