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Caterpillar Introduces C15 Water-Cooled Hazardous Location Engine to Complete itís Hazardous Area Well Service Product Offering

Caterpillar is the only engine manufacturer offering a complete line-up of engines certified to both NEC and ATEX requirements


Caterpillar Inc. today announces the availability of Cat® C15 ACERT™ water-cooled manifold engines certified for hazardous location use. The C15, rated at 536 and 540 bhp (400 and 403 bkW) at 2,000 rpm, joins the already certified C7 ACERT, C9 ACERT and C32 ACERT engines with powers ranging from 205 to 1,110 bhp (153 and 828 bkW). This makes Caterpillar is the only engine manufacturer to offer a complete line-up of hazardous location engines certified to meet both National Electric Code (NEC) and ATEX requirements.

These engines are primarily used for offshore blending, cementing and coiled tubing applications where personnel and rig safety are critical during daily operations. Available in either a hazardous location or standard water-cooled manifold configuration, the C15 meets the most current offshore emissions requirements, including EPA Marine Tier 2 and IMO Tier II, and is EPA Marine Tier 3 capable.

The C15 engine is also available in a standard, water-cooled manifold for non-hazardous location use, and can be configured with either a Separate Circuit (water-to-air) Aftercooled (SCAC), or a Remote Aftercooled (REMAC) cooling system which increases flexibility and ease of installation. The SCAC product is rated at 536 bhp at 1,800-2,000 rpm, and the REMAC product is rated at 540 bhp at 1,800-2,000 rpm. Caterpillar offers a complete line of engine attachments for either configuration.  

The C15 SCAC is Caterpillar’s first hazardous location engine solution certified up to customer hookup points. The hazardous location engine is rated at 536 bhp between 1,800- 2,000 rpm, with an ambient capability of 50° C on the mechanical system and 60° C on the electrical system. A variety of hazardous-location certified attachments are available, including an alternator, ATEX Messenger and ATEX throttle control, air compressor and inlet air flame trap. This engine also features Non-Sparking (nA) and Intrinsically Safe (ic) ECM wiring harnesses and sensors, as well as harness cable jackets that meet flame propagation requirements of IEC 60332-1-2.

The C15 hazardous location engine carries the following factory certifications:

NFPA 70 – NEC Article 500/505 Hazardous (Classified) Locations (USA)
Intertek ETL Classified
Class 1 Division 2, Gas Groups ABCD
Class 1 Zone 2, Gas Group IIC
Temperature Class T3 with Ambient Temp:  -30C < Ta < +60C
Conforms to ANSI / ISA Std 12.12.01-2007 Non-Incendive Electrical Equipment

European ATEX Directive 94/9/EC
Det Norske Veritas (DNV) Type Approval
Equipment Group II, Category 3G (Zone 2) Environments
Gas Group
IIA (Mechanical System)
IIC (Electrical System)
Temperature Class is T3 with Ambient Temp: 
-30C < Ta < +50C (Mechanical System)
-30C < Ta < +60C (Electrical System)
Mechanical System conforms to EN 1834-1
Flameproof Intake System including flame arrestors for aftercooler drain valve and turbo inlet
Electrical System conforms to EN 60079-0, -11, -14, and –15

“All Cat engines are designed to meet the stringent safety, reliability and durability demands of the petroleum market,” said Diana Hopkins, well service product manager for Caterpillar. “The C15 completes our lineup of hazardous location certified engines specifically engineered for ease of installation while meeting global safety and emissions requirements, making Cat the single source for all certified engine needs.”

Both the water -cooled and hazardous location C15 engines feature a single, advanced ADEM A4 engine management system with additional input/output capability, which results in less complicated packaging, easier operation and a more reliable solution. 

For more information on the C15 engine, please visit the C15 product website. For more information on the complete hazardous area product line, visit 

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