All the ratings that are defined have a manufacturing tolerance of ± 3%.
Use the following guidelines to determine the applicable engine rating.
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Operating an engine at a greater power output than the engine is rated for will reduce the service life of the engine before overhaul. |
Oil and Gas (E) Rating - For fire pump, offshore cranes, well fracturing, and cementing/kill pump - the power and speed capability of the engine which can be used to power high-pressure well service equipment. For C32 engines and smaller, the maximum average load factor is 35%. For well fracturing engines, the maximum average load factor is 50%, and the maximum time at rated load and speed is less than 2.5 hours per year. For cementing and kill pump engines, the maximum average load factor is 40%, and the maximum time at rated load and speed is less than 2 hours per year. When used as a fire pump and NFPA certification is required, size the pump power to 90% of the advertised rating.