New water-cooled hazardous location engines
New C7 ACERT, C9 ACERT, and C32 ACERT hazardous location water-cooled manifold engines are designed to meet the requirements of the hazardous location environments often found in offshore applications.
These engines are for use when running in an application where any ignition source from the engine such as hot skin temperature or electrical arcing could cause an explosion due to the hazardous chemicals or gases in the environment.
Engines can be configured at the following ratings:
• C7 ACERT: 205, 230, 275 bhp at 2,200 rpm.
• C9 ACERT: 340 bhp at 2,200 rpm.
• C32 ACERT: 800, 860, 920, 1,100 bhp at 2,100 rpm.
Thecompany says its engines meet the most current land and offshore emissions requirements, including EPA Tier 3, EU Stage IIIA, IMO and EPA Marine Tier 2 emissions requirements. Additionally, with the use of the EPA Tier 4 flexibility provisions, the EPA Tier 3 ratings will be applicable for land based applications until 2018, the firm points out.
The new engines provide additional cooling options based on the application. Both the separate circuit (water-to-air) aftercooled (SCAC) and remote aftercooled (REMAC) cooling system options are available on the C7 ACERT and C9 ACERT engines to increase flexibility and ease of installation. The C32 ACERT features the SCAC cooling system.
Units include these factory certifications:
• ATEX 94/9 Group II, 3G (Zone 2) Ex nA nR T3 Certification.
• Electrical system certified to gas group IIC.
• Mechanical system certified to gas group IIA.
• NEC 500—Class I Division 2 Non-incendive Field Wiring Group T3 Certification.
• NEC 505—Class I Zone 2 AEx nA nR Group IIC T3 Certification.
The water-cooled exhaust manifold engines feature water-cooled exhausts and turbochargers to maintain lower engine skin temperatures. Mostly used in offshore operations, the reduced engine skin temperature allows the engine to operate in enclosed areas and around hazardous materials. ATEX safety directives require that engine skin temperatures remain below 200° C. (T3). To comply, the C7 ACERT, C9 ACERT, and C32 ACERT ATEX configurations come with software to automatically derate engine power to maintain ATEX T3 skin temperatures in all ambient conditions up to 45°C.
The firm's custom packaging team offers complete engine-transmission packages for well servicing applications including workover, pumping, and fracturing. Packages are designed specifically for optimal performance and seamless integration, the company says.
Source: Caterpillar Inc., 100 NE Adams St., Peoria, IL 61629.
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