Small-Volume Type Y and Z Purging/Pressurization System
Application: Small-Volume Purging/Pressurization Systems are an alternative to NEMA Type 7 or 9 enclosures. The C1 model allows general-purpose enclosures, up to two cubic feet, to be used in certain Class 1 hazardous locations. The C2 model allows general purpose enclosures, up to 10 cubic feet, to be used in certain Class 2 hazardous locations.
Available in two models for enclosures with a maximum enclosure volume of up to 2 or 10 cubic feet
Mounting plate: Type 316 brushed stainless steel
Regulator body: zinc with enamel finish
Enclosure pressure gauge: aluminum with enamel finish
Polycarbonate regulator handle
Fastener hardware available in aluminum and stainless steel
Includes tamper-proof regulator with gauge (TR-10G) to comply with NFPA standard requiring protection against overpressurization
Note: Pressure Vent not required when inlet pressure limited to 5PSI using standard TR-10G. For inlet pressure over 5PSI order EPV-1-SA-00 or EPV-1-SA-90 separately. Contact Hoffman for pricing.
Protected Enclosures: Enclosures should be constructed from materials such as metal, fiberglass or polycarbonate material to meet or exceed NEMA Type 4, Type 4X or Type 12 performance requirements.
Classes define the explosive or ignitable substances that are present in the atmosphere.
Class I Flammable gases or liquid vapors
Class II Ignitable metal, carbon or organic dusts
Class III Ignitable fibrous materials
Group Ratings: Groups define substances by rating their explosive or ignitable nature in relation to other known substances.
Typical Class I Substances:
Group A Acetylene
Group B Hydrogen or >30% hydrogen by volume
Group C Ethyl, ether and ethylene
Group D Propane
Typical Class II Substances:
Group E Aluminum, magnesium and alloys
Group F Carbon, coke and coal
Group G Flour, grain, wood, plastic and chemicals
Divisions define the degree of hazard by determining an explosive or ignitable substance’s expected concentration in the atmosphere.
Division 1 Contains substances under normal conditions
Division 2 Contains substances under abnormal conditions
Division 1 areas must be surrounded by Division 2 areas.
Class II, Group E areas must be rated as Division 1 areas.
Modifications and Customizations: Hoffman excels at modifying and customizing products to your specifications. Contact your local Hoffman sales office or distributor for complete information.
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