Diaphragm valve WW-736

hydraulicseatmonobloc

Product overview
Hydraulically operated differential pressure-sustaining control valve 736 from the Sigma 700 series. Maintains a pre-set minimum differential pressure between two local or remote points regardless of flow fluctuations or varying upstream pressure.

Features & benefits

• Anti-cavitation capability for prolonged component life
• Wide flow range for versatile installations
• High stability and accurate pressure maintenance
• Drip-tight sealing to prevent leakage

Double-chamber design

• Moderated valve reaction for controlled operation
• Protected/isolated diaphragm to enhance reliability
• Optional operation at very low inlet pressure
• Moderated closing curve to reduce water hammer

Additional design highlights

• Flexible modular design — easy addition of options
• Obstacle-free flow path to minimize clogging and pressure loss
• V‑Port throttling plug (optional) for stable low-flow control
• High-quality materials suitable for potable and industrial water
• In-line serviceable actuator for simplified maintenance
• Certified to functional and drinking water standards: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 and others

Typical applications

• HVAC systems — balancing pressure during low-consumption conditions
• Pumping stations — maintaining constant differential pressure across pumps
• Filtration systems — automatic bypass of blocked filters or during high demand

Characteristics / Technical specifications

• Product type: Differential pressure-sustaining control valve
• Model: 736
• Series: Sigma 700
• Design: Double-chamber actuator with protected/isolated diaphragm
• Optional trim: V‑Port throttling plug for stable low-flow control
• Key features: Anti-cavitation, wide flow range, obstacle-free flow path, drip-tight sealing
• Maintenance: In-line serviceable actuator for easy maintenance
• Standards & certifications: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081 (and other regional functional/drinking water standards)