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AutoPurge and Quick-Check Overview for N2-BLAST Systems

Updated

This article provides a general overview of AutoPurge and Quick-Check accessories used with supported South-Tek N2-BLAST fire protection systems.

These accessories help maintain nitrogen purity within the fire protection system, improve visibility into system conditions, and support more efficient operation of the nitrogen generator package.

This article is intended as a general overview. For installation, adjustment, or product-specific instructions, refer to the related articles listed at the bottom of this page.

What is the AutoPurge System?

The AutoPurge System (APS) is used to help remove oxygen-rich trapped air from individual risers and replace it with high-purity nitrogen. This supports the goal of maintaining 98% or greater nitrogen purity throughout the fire protection system.

Unlike a simple fixed vent, the APS allows controlled purging at each riser. This helps the system purge air more effectively without creating unnecessary nitrogen generator or air compressor runtime.

AutoPurge System features

  • One AutoPurge System is typically installed per riser
  • Fully pneumatic operation with no electrical power required
  • Adjustable flow setting for tuning each riser
  • Helps maintain high nitrogen purity throughout the system
  • Supports more controlled purging than a simple open or closed vent device

Why AutoPurge is used

The APS is used to provide a controlled purge point at the riser. This helps avoid two common issues:

  • Insufficient purging, which may fail to maintain target nitrogen purity
  • Excessive purging, which may unnecessarily increase compressor and nitrogen generator runtime

Proper APS adjustment helps balance purge performance with operating efficiency across the fire protection system.

What is Quick-Check?

Quick-Check is a nitrogen purity verification accessory used with N2-BLAST systems. It helps building personnel, inspectors, or service teams confirm that the fire protection system is being supervised with high-purity nitrogen.

Depending on the accessory used, Quick-Check can be used for periodic spot-checking or for routine monitoring across multiple zones or risers.

Quick-Check portable purity sensor

The portable Quick-Check purity sensor is designed to provide a quick visual indication of oxygen content within the system. It is intended for periodic verification that the dry or pre-action system is blanketed with 98% or greater nitrogen.

This accessory is commonly used during service visits, inspections, or troubleshooting when system purity needs to be verified at a specific point.

Quick-Check purity manifold

The Quick-Check purity manifold is used to monitor nitrogen purity across multiple zones or risers while minimizing unnecessary equipment runtime.

  • Provides a zone-by-zone indication of nitrogen purity
  • Automatically monitors purity in each zone, typically once per day
  • If purity is 98% or greater, the purge closes and the equipment remains in standby mode
  • If purity is below specification, the zone purges until it returns to the target purity level
  • Can support remote monitoring capability

Why these accessories matter

  • Help maintain 98% or greater nitrogen purity throughout the fire protection system
  • Help reduce unnecessary generator and compressor runtime
  • Improve visibility into actual zone purity conditions
  • Support more efficient purging and supervision across multiple risers

Typical applications

AutoPurge and Quick-Check accessories are commonly used in dry and pre-action sprinkler systems where multiple risers or zones need to be purged, monitored, and maintained at proper nitrogen purity levels.

Related articles

Need additional support?

  • Phone: (910) 415-1880
  • Email: support@southteksystems911.zendesk.com
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