Surge Anticipator Valve

As a Surge Anticipator Valve Supplier in Dubai, UAE Valves provides valves engineered to protect pipelines from damaging water hammer and surge pressures. Installed downstream of pumps or at key nodes in transmission mains, these valves detect the initial low-pressure dip that follows a pump trip, open briefly to discharge flow to a safe location, and then close smoothly after the surge wave passes. Acting in advance keeps the system stable, prevents water hammer, and extends the life of pumps, pipes, and fittings.

How Surge Anticipator Valves Work

Surge anticipator valves use diaphragm-actuated, pilot-controlled mechanisms guided by two pilots:

• Anticipation pilot: senses the sudden pressure dip caused by a pump trip or power loss and signals the valve to open.
• Relief pilot: holds the valve open as the returning surge arrives, allowing excess pressure to be safely discharged.
• Needle valves: adjust opening and closing speeds so the valve action matches site hydraulics.
• Non-slam check feature: ensures smooth closure and prevents a secondary surge spike.
• Instrumentation: pressure taps, sense lines, and position indicators simplify setup, commissioning, and periodic checks.

Benefits

• Reduces surge and water hammer after pump trips and rapid valve closures
• Protects pipes, joints, instruments, and rotating equipment from pressure spikes
• Smooth, controlled closing avoids secondary peaks
• Adjustable opening and closing speeds tuned to local hydraulics
• Clear valve position and line pressure monitoring during testing and commissioning
• Spare diaphragms, pilots, and seal kits available for lifecycle maintenance

Industries Served

Our experience as a Surge Anticipator Valve Supplier in Dubai extends across:

• Water transmission & distribution – rising mains and pumping stations
• Desalination plants – product water headers and transfer networks
• Wastewater networks – rising mains and treatment facilities
• Power generation – cooling water and auxiliary service pipelines
• District cooling & industrial utilities – chilled water networks and pump discharge protection
• Petrochemical & firewater systems – utility and emergency networks where trip events are critical

Technical Specifications

• Size range: DN 80 to DN 1200 (3 in to 48 in)
• Pressure ratings: PN 10 to PN 25; ASME Class 150 standard for water duty
• Temperature range: −10 °C to +80 °C for water service; higher available with stainless steel or alloy trims
• End connections: flanged (EN 1092-1 PN10/16/25 or ASME B16.5 Class 150/300); grooved ends to AWWA C606 (DN 80–300); butt weld ends for steel lines; gasket style and drilling matched to site standards
• Body style: globe pattern, diaphragm actuated, pilot controlled
• Controls: anticipation pilot, relief pilot, opening/closing speed needle valves, non-slam check feature
• Ports & taps: upstream/downstream gauges, sense line, test cocks
• Coatings: epoxy lining per AWWA C550 or project specification
• Options: remote sense lines, discharge diffuser or silencer, outdoor enclosures, event loggers, SCADA/telemetry integration

Design Standards

• ASME B16.34 – pressure-containing components
• EN 1074 series – valves for water supply systems
• ISO 5208 / EN 12266 – pressure and seat leakage testing
• EN 1092 / ASME B16.5 – flanges and drilling
• AWWA guidance – control valve assemblies for surge protection

Inspection and Testing

• Hydrostatic shell and seat tests to ISO 5208 / EN 12266
• Functional checks of anticipation and relief pilots with recorded set points
• Stroke timing and smooth closure verification with adjustable speed settings
• Coating inspection for dry film thickness and holiday testing where specified
• EN 10204 3.1 or 3.2 material traceability with serialized records
• Documentation packages available on request (material certificates, hydrotest results, pilot calibration records)
• Third-party inspection available as per client requirements

Body and Trim Material Compatibility

Special Features

• Dual pilot system: anticipates the dip and relieves the returning surge
• Adjustable opening and closing speeds for site-specific hydraulics
• Remote sensing from control points for accurate anticipation
• Diffuser or silencer options for safe and quiet discharge
• Event counters and pressure logging for commissioning and diagnostics
• Isolation valves, strainers, and bypass lines to simplify service and testing
• Customisation available for materials, coatings, pilots, and control accessories to match project standards