Hydraulic valve 757-80-U

flow-controllevel controlfor water

Overview
Hydraulically operated control valve for reservoir filling and level regulation. During filling the valve limits flow to a preset maximum regardless of upstream pressure or reservoir level and protects the main valve against cavitation. The valve shuts off at a preset high reservoir level and reopens fully in response to an approximately 1 m (3 ft) level drop sensed by the 3-way altitude pilot mounted on the main valve.

Key features & benefits

• Anti-cavitation design reducing risk of damage
• Wide operational flow range
• High stability and control accuracy
• Drip-tight sealing
• Moderated closing curve to reduce water hammer

Design - double-chamber actuator

• Double-chamber actuator for moderated valve reaction
• Protected and isolated diaphragm
• Option for reliable operation at very low inlet pressure

Product options and maintenance

• Optional V-Port throttling plug for stable low-flow control
• Flexible design allowing addition of features and position indicators
• In-line serviceable design for easy maintenance
• Materials suitable for potable water and demanding environments

Typical applications

• Municipal systems: level control for water towers and elevated reservoirs
• Reservoir filling with flow limitation and cavitation prevention
• Bi-level control for water refreshment
• Water distribution systems prioritizing upstream supply over reservoir filling
• Potable water systems and fire protection installations

Certifications & standards

• EN-1074
• NSF-ANSI 61-372
• WRAS
• AS 5081
• Other regional and industry accreditations as applicable

Technical specifications

• Model: 757-80-U
• Series: 700 Sigma Series
• Product type: Level and flow control valve with 3-way altitude pilot
• Operation: Hydraulically operated control valve
• Functionality: Limits filling flow to preset maximum; shuts off at preset high level; reopens on ~1 m (3 ft) level drop
• Design: Double-chamber actuator; obstacle-free flow path; protected diaphragm
• Options: V-Port throttling plug (optional); various actuator and position indication options
• Maintenance: In-line serviceable actuator for easy maintenance
• Materials: Suitable for potable water
• Applications: Reservoir filling, municipal networks, potable water, fire protection, industrial and mining
• Internal code (page): 30239