Turnkey systems
Complete purge & pressurization systems
A purge system keeps a protective gas inside the enclosure. The gas pressure keeps flammable gases, vapors, and dust out — so standard electrical equipment can operate safely in a hazardous area.
We integrate purge and pressurization systems sized for enclosures from small junction boxes to large multi-door control panels. Each system is selected for enclosure size, hazardous area classification, and your application.
The purge hardware is one component of the panel. Our engineers specify the purge unit, pressure monitoring, and safety interlocks for every project. You get a complete, documented system — not a box of parts.
Purge hardware
Built around Best Purging Systems units
We specify and integrate Type Y and Z enclosure purging units from Best Purging Systems — UL-listed hardware designed to meet NFPA 496 and NEC requirements for Class I hazardous locations.
These units regulate and monitor the protective gas supply, with color-coded pressure indication and optional differential pressure switches for loss-of-pressure signaling. We size the unit to your enclosure volume, then design the rest of the panel around it — mounting, wiring, interlocks, and documentation included.
Applications
Where purge systems are used
Purge systems protect control panels in areas where flammable gases, vapors, or dust can be present.
Oil & Gas
Well sites, pipelines, and refineries with flammable gases
Chemical Processing
Plants that store or process flammable chemicals
Wastewater
Treatment areas where methane and other gases collect
Paint Booths
Spray finishing areas with flammable paint vapors
Ethanol & Solvents
Sites that produce or handle flammable liquids
Dust Hazard Areas
Grain, wood, and powder processing with combustible dust
Our process
How we build them
One shop does the full scope. You do not need to coordinate multiple vendors.
- 01
Design
We size the purge system and lay out the enclosure for your area classification.
- 02
Enclosure modification
Our Steinhauer CNC machine cuts the openings for the purge hardware.
- 03
Component integration
We install the purge unit, pressure sensors, alarms, and interlocks.
- 04
PLC / HMI programming
We program the purge sequence, alarms, and shutdown logic.
- 05
Testing & documentation
We test each system and supply drawings, manuals, and certification labels.
NFPA 496
Choosing the right purge system
Three purge types. The correct choice depends on your area classification and the equipment inside the enclosure.
Type X
Division 1 → non-hazardous
Lets standard equipment operate in a Division 1 area. If protective gas pressure fails, the system removes power automatically. Use Type X for the most hazardous areas.
Type Y
Division 1 → Division 2
Lets Division 2-rated equipment operate in a Division 1 area. If pressure fails, an alarm warns personnel. Immediate power removal is not required.
Type Z
Division 2 → non-hazardous
Lets standard equipment operate in a Division 2 area. The simplest of the three systems — an alarm warns personnel if pressure fails.
Why South Coast
Built by engineers who know hazardous areas
Fast engineering turnaround
You get drawings and quotes quickly.
Custom, not catalog
We build each panel for your application. We do not sell off-the-shelf panels.
UL 508A / UL 698A certified shop
Your panel carries the correct UL labels for hazardous areas.
Complete automation integration
PLC, HMI, and SCADA work stays in one shop.
Nationwide support
We ship and support systems across the United States.