Products and Systems: R. STAHL, INC.

Interactive Purge Selection Guide and Online Store

Quickly choose the product you need, and order online

Introducing, PurgEx™. The most Compact, Lightweight, and Globally Certified Purge X, Y, and Z Purge Indicator on the market. With its UL certification, it is ideal for any integrator / panel shop. Its ATEX/IECEx certifications make it the ideal product for anywhere in the world! For Z-purge applications containing enclosures 15 cubic feet or smaller, the PurgEx™ Z Purge Indicator unit comes complete with an integral vent. No need to order a separate one.

Part Number: N/A
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View Specs
 
Indicator Configuration - STEP 1
Certification Required Dust or Gas
Environment
Type of Purge
Type of Purge

What protection method do you need? X, Y, or Z?

Type "Z"
Protects general-purpose equipment in Division 2 / Zone 2 areas. This system reduces the classification within protected enclosures from Division 2 / Zone 2 to nonclassified. Automatic power control disconnects are not required, but visual and / or audible alarms must be initiated when there is loss of pressure. THIS IS THE MOST COMMON SELECTION

Type "Y"
Protects Division 2 / Zone 2 rated equipment in Division 1 / Zone 1 areas. This system reduces the classification within protected enclosures from Division 1 / Zone 1 to Division 2 / Zone 2. All protected equipment must be rated for Division 2 / Zone 2. Automatic power control disconnects are not required, but visual and/ or audible alarms must be initiated when there is loss of pressure. In addition to all requirements in Z there must be a remote monitor alarm.

Type "X"
This system reduces the classification within protected enclosures from Division 1 / Zone 1 to nonhazardous. It is required to automatically control electrical power to all protected equipment.
Size of Enclosure
 
Indicator Configuration - STEP 2
Style of Indicator/Controller Voltage Material Contact
 
Accessories - STEP 3
Inlet Kit
Inlet Kit

The inlet kit determines how the purified air is maintaining pressure in the panel. There are 3 types:
  1. CONTINUOUS DILUTION: Continuous dilution is a method of maintaining pressure in an enclosure in which after the enclosure has been pre-purged the protective gas is passed continuously through the enclosure at a pressure above that of the specified minimum and discharged to the outside atmosphere through an exhaust vent. The same volume of purge gas is maintained during and after the dilution cycle.
  2. MANUAL LEAKAGE COMPENSATION: Manual leakage compensation allows a higher volume of protective gas supply to be manually selected to speed up dilution of potentially flammable materials to an acceptable level, permitting a more-rapid application of initial power, or restoration of power to protected electrical equipment, after service. When the dilution cycle has elapsed, the large volume of purge gas can be manually turned off. A volume of purge gas larger than the leak rate of the enclosure will be introduced into the now protected enclosure to maintain at least 0.20 inches H2O (0.50 mbar).
  3. AUTOMATIC LEAKAGE COMPENSATION (X PURGE ONLY): Automatic leakage compensation allows a higher volume of protective gas supply to be automatically selected by the Purge Controller to speed up dilution of potentially flammable materials to an acceptable level, permitting a more-rapid application of initial power, or restoration of power to protected electrical equipment, after service. When the dilution cycle has elapsed, the large volume of purge gas can be automatically turned off by the Purge Controller. A volume of purge gas larger than the leak rate of the enclosure will be introduced into the now protected enclosure to maintain at least 0.30 inches H2O (0.75 mbar).
Exhaust Vent
Exhaust Vent

Traditional purge systems require an accessory exhaust vent. PurgEx does not require a separate vent for enclosures 15 cubic feet or smaller. For larger enclosures, let us know where you plan to put the vent. Top or side? If you plan to buy it separate, just indicate No Exhaust Vent.