Diaphragm valve WW-757-66-U

hydraulichydraulically-operatedfloat

Product overview
Hydraulically operated control valve to manage reservoir filling and maintain reservoir level. During filling the valve limits flow to a preset maximum regardless of upstream pressure fluctuations or reservoir level, and its design reduces risk of cavitation. Reservoir filling is actuated by a hydraulically controlled, non‑modulating bi‑level vertical float that opens at a preset low level and shuts drip‑tight at a preset high level.

Features & Benefits

• Anti‑cavitation design for extended service life
• Wide flow range with stable regulation
• High stability and accurate level control
• Drip‑tight shutoff at high level
• Obstacle‑free flow path to minimize pressure losses
• Optional V‑Port throttling plug for stable low‑flow control
• In‑line serviceable design for simplified maintenance
• Materials and construction suitable for potable and functional water (see certifications)

Double chamber design

• Moderated valve reaction for smooth operation
• Protected diaphragm for increased reliability
• Optional operation in very low inlet pressure conditions
• Moderated closing curve to reduce water hammer

Flexible design

• Modular options: V‑Port plug, position indicators, limit switches, position transmitters, etc.
• Easy integration and retrofit into existing installations

Typical applications

• Reservoir filling and flow control
• Cavitation prevention during filling operations
• Bi‑level control for water renewal in municipal and industrial systems

Technical specifications

• Model: 757-66-U
• Series: 700 Sigma Series
• Type: Hydraulically operated level and flow control valve
• Float: Non‑modulating bi‑level vertical float (opens at preset low level, shuts drip‑tight at preset high level)
• Actuator: Double‑chamber actuator with protected diaphragm
• Flow path: Obstacle‑free flow pass
• Optional: V‑Port throttling plug for improved low‑flow stability
• Service: In‑line serviceable for simplified maintenance
• Sealing: Drip‑tight shutoff
• Typical applications: Reservoirs, municipal networks, water resources, pumping stations, irrigation
• Certifications / Standards: EN‑1074, NSF/ANSI 61/372, WRAS, AS 5081 (and others)
• Data barcode (internal): 30193