Pump unit for building sites, especially for generating a higher pressure to supply plastering machines

摘要

A pressure-boosting pump, especially for plastering machines, can be assembled from a pump (2, 3) which generates a yet higher pressure and which by itself can be used for spray cleaning and from a water-jet pump (10) driven thereby (11; 7, 18), which, together with their suction side (7, 19), can be connected to the available water main or a water tank. This provides two possible uses. In the assembled form, a larger amount of water is pumped at a lower pressure, as is required for plastering machines. After the water-jet pump has been removed, a pump generating a high pressure is available for spray cleaning. IMAGE