Hydraulically-operated valve 740-03-S

booster pump controlin-linefor pump

Product overview
Double-chambered, hydraulically operated active check pump control valve (Model 740-03-S, 700 Sigma Series). Opens fully or shuts off in response to electric control signals to isolate the pump during start‑up and shutdown, preventing pipeline surges and protecting system components.

Features & benefits

• Excellent anti-cavitation performance for prolonged component life
• Wide operating flow range adaptable to variable pump regimes
• High hydraulic stability and control accuracy for consistent pressure management
• Drip-tight sealing to minimize leakage
• In-line serviceable design reduces downtime and simplifies maintenance

Double chamber design

• Moderated valve reaction to reduce transient stresses
• Protected diaphragm to extend service intervals
• Optional operation at very low inlet pressures
• Moderated closing curve to limit hydraulic shock

Options & construction

• Obstacle-free full-bore flow passage
• V-Port throttling plug (optional) — provides very stable behaviour at low flow
• High-quality corrosion-resistant materials suitable for potable water
• Opening and closing speed controls and limit switch for integration with pump control systems

Certifications

• Certified to functional and drinking water standards: EN-1074
• NSF-ANSI 61-372
• WRAS
• AS 5081
• Other regional certifications available on request

Typical applications

• Pumping stations — controls pump start-up and shut-down; isolates pump to prevent surges and cavitation
• Drinking water supply, irrigation systems, building services and other waterworks

Technical specifications

• Model: 740-03-S
• Series: 700 Sigma Series
• Type: Double-chambered, hydraulically operated active check pump control valve
• Controls: Opening and closing speed controls; limit switch
• Flow design: Obstacle-free full-bore; optional V-Port throttling plug for stable low-flow performance
• Key properties: excellent anti-cavitation, wide flow range, high stability and accuracy, drip-tight sealing, in-line serviceable
• Materials: High-quality, suitable for potable water applications
• Standards / certifications: EN-1074; NSF-ANSI 61-372; WRAS; AS 5081
• Barcode / page code: 29871