Non-slam or Surge-arresting Air Valve

NR - Non-slam (NS) or Surge Arresting (SA) Air Valves are designed to both allow large air intake, preventing the risk of excessive negative pressure that may cause collapse of the pipe, and to restrict air outflow when discharge air velocity exceeds a threshold value. This creates a slow closing ‘air cushion’ that decelerates the velocity of the wastewater flow, preventing a water hammer effect from occurring.

Directing the Flow

Non-slam or Surge-arresting Air Valve

NR - Non-slam (NS) or Surge Arresting (SA) Air Valves are designed to both allow large air intake, preventing the risk of excessive negative pressure that may cause collapse of the pipe, and to restrict air outflow when discharge air velocity exceeds a threshold value. This creates a slow closing ‘air cushion’ that decelerates the velocity of the wastewater flow, preventing a water hammer effect from occurring.
Wastewater BC RE D26 3 Typical installation
Solution Components
Arisense Swg – A.R.I. D-26 SWG
A.R.I. D-26
Full-bore, Combination Air Valve Series for Wastewater
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Arisense Swg – A.R.I. NR-040 FS SWG
A.R.I. NR-040 FS
Check Valve for Wastewater
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