The series of pumps can be used in road maintenance vehicles and small road cleaning vehicles, such as the need for small flow high pressure high-pressure cleaning system. This is a new design pump, the flow rate of 27-75L per minute, it is designed as a high-speed model, economic and practical, pump body follows the conventional design, crankshaft using high-strength steel, and with two super-large tapered roller bearings for support. Ensure stable operation of the pump.