Diaphragm relief valve WW-730

hydraulically-operated

Overview
Pressure relief/sustaining hydraulically operated control valve that can fulfill either of two separate functions: When installed in-line, it sustains a minimum pre-set upstream (back) pressure regardless of fluctuating flow or varying downstream pressure. When installed as a branched-from-the-line circulation valve it relieves excessive line pressure when above the maximum pre-set.

Features & Benefits

• Excellent anti-cavitation properties
• Wide flow range
• High stability and accuracy
• Drip-tight sealing

Double chamber design

• Moderated valve reaction
• Protected diaphragm
• Optional operation in very low pressure
• Moderated closing curve

Additional design highlights

• Flexible design allowing easy addition of features
• Obstacle-free flow pass
• V-Port throttling plug (optional) — very stable at low flow
• High quality materials
• In-line serviceable for easy maintenance
• Unit can be supplied with actuator options and position indication/limit switch/position transmitter options

Certifications

• Certified to functional and drinking water standards: EN-1074
• NSF-ANSI 61-372
• WRAS
• AS 5081

Typical Applications

• Water delivery systems — prioritizing upstream over downstream demand
• Water delivery systems — prioritizing upstream demand to maintain pressure
• Pumping stations — ensure operating point on pump curve
• Pumping stations — circulation during low demand
• Filtration systems — sustaining minimum pressure for efficient backflush

Technical specifications

• Brand: BERMAD
• Model: 730
• Series: 700 Sigma Series
• Function: Pressure relief and/or pressure sustaining
• Operation: Hydraulically operated control valve; pilot-operated
• Design: Double-chamber diaphragm actuator; obstacle-free flow path; optional V-Port plug
• Maintenance: In-line serviceable actuator for easy maintenance
• Key features: Anti-cavitation design, wide flow range, high stability and accuracy, drip-tight sealing
• Certification standards: EN-1074, NSF-ANSI 61-372, WRAS, AS 5081
• Typical segments: Waterworks; Buildings & Construction
• Internal product barcode/reference on page: 29779