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Governors versus Relief Valves: Why the Conflict?
Monday, November 5th, 2007
by Doug Kelley
One of the more vocal technological debates in the fire apparatus world concerns the system used to control the pump. In this world, there are two main systems. The first system consists of a direct engine speed control combined with some type of mechanical pressure relief valve. The second system consists of a digital pressure monitoring system (i.e. a governor) that automatically adjusts engine speed based upon the operator’s input.
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