UNITED FLOOR MACHINE CO. 

All three sizes of our explosion proof floor machines are CSA Certified for Class I Group D applications.

Class I Locations

According to the NEC, there are three types of hazardous locations. The first type of hazard is one which is created by the presence of flammable gases or vapors in the air, such as natural gas or gasoline vapor. When these materials are found in the atmosphere, a potential for explosion exists, which could be ignited if an electrical or other source of ignition is present. The Code writers have referred to this first type of hazard as Class I. So, a Class I Hazardous Location is one in which flammable gases or vapors may be present in the air in sufficient quantities to be explosive or ignitable. Some typical Class I locations are:

• Petroleum refineries, and gasoline storage and dispensing areas;
• Dry cleaning plants where vapors from cleaning fluids can be present;
• Spray finishing areas;
• Aircraft hangars and fuel servicing areas; and
• Utility gas plants, and operations involving storage and handling of liquified petroleum gas or natural gas. 

The gases and vapors of Class I locations are broken into four groups by the Code: A, B, C, and D. These materials are grouped according to the ignition temperature of the substance, its explosion pressure, and other flammable characteristics.

The only substance in Group A is acetylene. Acetylene makes up only a very small percentage of hazardous locations. Consequently, little equipment is available for this type of location. Acetylene is a gas with extremely high explosion pressures.

Group B is another relatively small segment of classified areas. This group includes hydrogen and other materials with similar characteristics. If you follow certain specific restrictions in the Code, some of these Group B locations, other than hydrogen, can actually be satisfied with Group C and Group D equipment.

Group C and Group D are by far the most usual Class I groups. They comprise the greatest percentage of all Class I hazardous locations. Found in Group D are many of the most common flammable substances such as butane, gasoline, natural gas and propane.

 Sizes

 15" (SBXC-15MH), 17" (SBXC-17MH), and 20" (SBXC-20M)

Manual: 

Cover, Page 1, Page 2, Sales Sheet

Parts Breakdown: 

SBXC Base Assembly

SBXC Handle Picture

SBXC Handle Parts

SBXC Motor

17" EXPLOSION PROOF FLOOR MACHINE

Model: SBXC 17MH (full view)

17" EXPLOSION PROOF FLOOR MACHINE

Model: SBXC 17MH (motor / base)

15" EXPLOSION PROOF HEAVY DUTY SCRUB BRUSH / BERYLLIUM BRONZE

(Part# 15-SBXC-BR)

17" EXPLOSION PROOF SCRUB BRUSH / BASSINE & BRASS

(Part# 17-SBXC-BA)

17" EXPLOSION PROOF POLISHING BRUSH / UNION MIX & BRASS

(Part# 17-SBXC-UM)