Semi hydraulic three diaphragm pump for semi professional agricultural sector. In combination with an electric or petrol engine on a gardening trolley, a small sprayer treated with medium pressure plant protection products in a garden, greenhouse, orchard or vineyard. Components in contact with the pumped liquid shall be aluminum oxide and AISI 303/304. NBR membrane. Seals in the NBR. Die-cast cart with oil bath mechanism, clear plastic fuel tank for visual level control. Remote control sensors provided upon request. Kit for remote installation of fuel tank upon request. Drain plug. Segmented pistons increase the efficiency of membrane protected "oil pad" systems. The newly designed film locking system avoids contact tearing even under heavy use. Valves with spherical fan-shaped profiles reduce liquid resistance and improve volumetric efficiency. The screws are galvanized. Gearboxes for electric or gasoline engines, flanges for hydraulic motors, gearboxes or small motorized operation machines may be supplied.