Type Y & Z NFPA 496 Enclosure Pressurization Units Description

Did you know?

Our Pressurization Units may also be utilized to protect your equipment from issues such as moisture, dust or corrosive vapors in Non-Hazardous locations.
Please contact a Best Purging Systems Sales Associate to select appropriate Units for these applications…

Product Description

Best Purging Systems Type Y and Z Pressurization Units protect electrical equipment in Class I and Class II Hazardous Locations. When connected to a supply of protective gas these models will supply, regulate and monitor the protective gas supply to a protected enclosure; and are UL Listed and designed to meet or exceed NEC – NFPA 70, NFPA 496, EN 50016 and IEC 60079-02 requirements.

Each Unit features a regulator to set enclosure pressure along with a color-coded analog differential pressure indicator that displays enclosure pressure.  Our Vertical and Horizontal Configuration Units also feature a Differential Pressure Switch available in several styles to provide a signal to indicate enclosure pressure loss.

When utilized for Type Z applications, these Units reduce the hazardous location rating inside the enclosure from Division 2/ Zone 2 to non-hazardous. This allows non-rated equipment to operate in Division 2/ Zone 2 areas.

When utilized for Type Y applications, these Units reduce the hazardous location rating inside the enclosure from Division 1/ Zone 1 to Division 2 / Zone 2. This allows Division 2/ Zone 2 equipment to operate in Division 1/ Zone 1 areas.

IMPORTANT NOTE:  Model RR Redundant Regulators installed upstream of the Pressurization Unit or Model PV Spark Arresting Purge Vents installed on the protected enclosure are required for safe operation. 

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Product Line Details

Model 101A Pressurization Units

Model 101A

Type Y & Z Purging & Pressurization Unit
Class I: 2 CF Maximum / Class II: 10 CF Maximum

CONFIGURATIONS

Universal Mount, less Pressure Switch
Mounts on any Side or Panel Mounts

Vertical Mount Unit, with Pressure Switch
Mounts on Left or Right Side

Horizontal Mount, with Pressure Switch
Mounts on Top or Bottom

Model 101B Pressurization Units

Model 101B

Type Y & Z Pressurization Unit
Class II: 50 CF Maximum

CONFIGURATIONS

Universal Mount, less Pressure Switch
Mounts on any Side or Panel Mounts

Vertical Mount Unit, with Pressure Switch
Mounts on Left or Right Side

Horizontal Mount, with Pressure Switch
Mounts on Top or Bottom

Model 101C Pressurization Units

Model 101C

Type Y & Z Pressurization Unit
Class II: 250 CF Maximum

CONFIGURATIONS

Universal Mount, less Pressure Switch
Mounts on any Side or Panel Mounts

Vertical Mount Unit, with Pressure Switch
Mounts on Left or Right Side

Horizontal Mount, with Pressure Switch
Mounts on Top or Bottom