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.
Specifications:
Universal mount
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.
Class Ratings:
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
Division Ratings:
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
Notes:
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.