Diaphragm valve WW-770-J

hydraulically-operatedflow-controlseat

Overview
Hydraulically operated flow control valve that maintains a pre-set maximum flow regardless of inlet pressure or fluctuating demand; includes opening and closing speed controls and upstream orifice plate option.

Key benefits

• Excellent anti-cavitation performance
• Wide operating flow range
• High stability and flow accuracy
• Drip-tight sealing for leak prevention

Double-chamber design

• Moderated valve reaction for smooth control
• Protected diaphragm for extended service life
• Optional operation at very low inlet pressures
• Moderated closing curve to reduce water hammer

Flexible design and features

• Obstacle-free flow passage to minimize clogging
• Optional V-Port throttling plug for stable low-flow control
• High-quality corrosion-resistant materials
• In-line serviceable for straightforward maintenance

Certifications

• Compliant with EN-1074 (functional and drinking water variants)
• NSF/ANSI 61-372
• WRAS
• AS 5081

Typical applications

• Water distribution networks — balance supply capacity with demand
• HVAC systems — limit flow to maintain system efficiency
• Filtration and treatment processes — precise process flow control

Technical specifications

• Model: 770-03-U
• Series: 700 Sigma Series
• Product type: Hydraulically operated flow control valve
• Primary function: Maintain pre-set maximum flow regardless of pressure/demand variations
• Built-in controls: Opening and closing speed adjustment
• Design: Double-chamber with protected diaphragm
• Options: V-Port throttling plug (optional) for low-flow stability; upstream orifice plate
• Serviceability: In-line serviceable
• Materials: Selected for longevity and cavitation resistance
• Certifications: EN-1074, NSF/ANSI 61-372, WRAS, AS 5081 (depending on variant)