What is the difference between a belt-drive pump and a direct-drive pump?
A high-pressure pump does not turn on its own; rather it is driven by an engine or motor. Pumps driven by motor generally turn at 1100-1500 RPM while gasoline engines turn at a rate of 3000-3600 RPM (1450-3450 RPM for electric motors). There are two predominant ways to connect the pump to an engine or motor: directly (direct-drive) or with a pulley and belt (belt-drive). Direct-drive pumps are more compact, helping to keep the weight and cost down. Today’s direct-drive pumps have been engineered to hold up very well, even under constant use. The weakness, of course, is that a pump turning at 3600 RPM will wear out faster than a pump that turns at 1500 RPM. On the other hand, a belt-drive pump, configured with a pulley and belt, allows the pump to turn at the slower rate (usually 1500 RPM). The belt also dissipates the build up of heat and absorbs vibration from the engine. The ultimate benefit, of course, is that downtime is minimized and the pump’s life is extended saving you money in
