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Small-Volume Type Y and Z Purging/Pressurization System

Bulletin Number:

  • HL
  • RoHS Flag:

    Industry Standards:

    For A1001YZUMC1 (Volume up to 2 cubic feet) NEC Type Y Class I, Division 1, Groups A, B, C and D to Division 2 NEC Type Z Class I, Division 2, Groups A, B, C and D to Unclassified Classified by Underwriters Laboratories, cUL and Factory Mutual For A1001YZUMC2 (Volume up to 10 cubic feet) NEC Type Y Class II, Division 1, Groups F and G to Division 2 NEC Type Z Class II, Division 2, Groups F and G to Unclassified Classified by Underwriters Laboratories, cUL and Factory Mutual
    Description

    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.

    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.
    Items
    Catalog Number Depth in. Height in. Volume ft. 3 Model
    A1001YZUMC1 5.00 9.00 2 1001, Class 1
    A1001YZUMC2 5.00 9.00 10 1001, Class 2
    Drawings and Technical Publications are available by clicking the "Items" tab. Select your desired Catalog Number and click on the Downloads tab for that particular catalog number.