Hydraulically-operated valve 735-M

flow-controlfor waterfor potable water

Overview The 735-M is an off-line, hydraulically operated surge-anticipating control valve with a mechanical flow stem, part of the 700 Sigma Series. It opens immediately on the pressure drop caused by abrupt pump stoppage to dissipate the returning high-pressure wave and closes drip-tight under controlled relief to prevent closing surge. The valve also provides pressure relief for excessive system pressure.

Features & Benefits

• Anti-cavitation design
• Wide flow range
• High stability and accuracy in control
• Drip-tight sealing

Double chamber design

• Moderated valve reaction to transient events
• Protected diaphragm
• Optional operation at very low inlet pressure
• Moderated closing curve to avoid closing surge

Design / Additional Features

• Modular design for easy addition of options
• Obstacle-free flow passage
• Optional V-Port throttling plug for improved low-flow stability
• Materials suitable for potable water applications
• In-line serviceable actuator for simplified maintenance
• Certified to EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 and other drinking-water/functional standards

Typical Applications

• Pumping stations — surge control
• Waterworks and irrigation networks

Technical specifications

• Model: 735-M
• Series: 700 Sigma Series
• Product type: Surge-anticipating control valve (off-line, hydraulically operated)
• Flow stem: Mechanical flow stem
• Actuator design: Double-chamber
• Operation: Pre-opens on pump stop to dissipate returning pressure wave; controlled drip-tight closing to prevent closing surge; provides overpressure relief
• Options: V-Port throttling plug for enhanced low-flow stability; low-pressure operation variants
• Maintenance: In-line serviceable actuator for easy maintenance
• Certifications: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 (and other applicable standards)
• Typical sectors: Waterworks, Irrigation