Hydraulic valve 743-03-S

pressure-controlisolationfor potable water

Product
Hydraulically operated booster pump control & pressure sustaining valve with active check, opening and closing speed control, and limit switch. Model: 743-03-S, 700 Sigma Series.

Overview
Hydraulically operated, active check, pump control & pressure sustaining valve with two independent functions: it opens fully or shuts off in response to electric signals to isolate the pump during startup and shutdown to prevent pipeline surges. While open, it sustains minimum pump discharge pressure regardless of flow variations and prevents the pump from exceeding its design flow or power consumption.

Main Features & Benefits

• Opening and closing speed control; integrated limit switch
• Excellent anti-cavitation performance
• Wide flow range with stable regulation
• High stability and accuracy; drip-tight sealing
• In-line serviceable for simplified maintenance

Double chamber design

• Moderated valve reaction and closing curve
• Protected diaphragm
• Option for very low pressure operation

Additional Design Highlights

• Flexible architecture — easy addition of optional features
• Obstacle-free flow passage
• V-Port throttling plug (optional) for stable low-flow control
• Materials selected for potable water compliance

Certifications & Standards

• EN-1074
• NSF-ANSI 61-372
• WRAS
• AS 5081

Typical Applications

• Pumping stations — controls pump start-up and shut-down to prevent transients
• Pumping stations — maintains operating point on the pump curve and protects pump performance

Technical Specifications

• Model: 743-03-S
• Series: 700 Sigma Series
• Operation: Hydraulically operated, active check, pump control & pressure sustaining valve
• Functions: Two independent functions — electric-open/electric-shut-off; sustains minimum pump discharge pressure while open
• Features: Opening & closing speed control; limit switch (as provided)
• Design: Double-chamber; moderated closing curve; protected diaphragm
• Options: V-Port throttling plug; versions for very low pressure operation
• Maintenance: In-line serviceable
• Performance: Anti-cavitation; wide flow range; high stability and accuracy; drip-tight sealing; obstacle-free flow pass
• Materials: Suitable for potable water (see certifications)
• Barcode / internal code: 253869