Hydraulically-operated relief valve WW-730-55

diaphragm

Overview
Hydraulically operated pressure relief / pressure sustaining control valve capable of two distinct functions: installed in-line it sustains a pre-set minimum upstream (back) pressure regardless of fluctuating flow or varying downstream pressure; installed as a branched-from-line circulation valve it relieves excessive line pressure when above a pre-set maximum.

Features & Benefits

• Designed for demanding conditions
  • Excellent anti-cavitation properties
  • Wide flow capacity
  • High stability and pressure-control accuracy
  • Drip-tight sealing
• Double-chamber design
  • Moderated valve response
  • Protected diaphragm
  • Optional operation at very low pressure
  • Controlled closing curve
• Flexible configuration — easy addition of options
• Obstacle-free flow passage
• V-Port throttling plug (optional) — very stable at low flow
• In-line serviceable — simplified maintenance
• Certified for potable water and functional standards — EN-1074, NSF/ANSI 61-372, WRAS, AS 5081 and others

Typical Applications

• Water distribution systems — prioritize upstream pressure over downstream demand
• Water networks — sustain upstream pressure to maintain service levels
• Pumping stations — ensure operating point on pump curve
• Pumping station circulation during low demand periods
• Filtration and backwash systems — maintain minimum pressure for efficient backflush

Certifications & Compliance

• EN-1074
• NSF-ANSI 61-372
• WRAS
• AS 5081
• Additional regional drinking-water and functional standards

Technical characteristics / specifications

• Model: 730
• Series: 700 Sigma Series
• Product type: Pressure Relief / Pressure Sustaining hydraulically operated control valve
• Primary functions: sustain pre-set upstream (back) pressure in-line; relieve excessive line pressure when installed as branched circulation valve
• Design: double-chamber actuator for moderated response and controlled closing curve
• Flow characteristics: wide flow range; obstacle-free flow passage
• Optional features: V-Port throttling plug for stable low-flow control; optional low-pressure operation
• Materials: specified for potable water service and long life
• Maintenance: in-line serviceable for easy maintenance
• Anti-cavitation: excellent anti-cavitation properties
• Sealing: drip-tight sealing
• Typical installations: municipal networks, pumping stations, filtration/backwash systems, distribution lines, potable water systems
• Internal reference / barcode (site): 29779