4YS oil-filled submersible motor

The installation illustration shows vertical operation with the pump fully submerged, at least 5 m above the well bottom, and a stated maximum depth of 80 m. Treat those as the illustrated installation limits, not a hydraulic head rating. Record the water level while pumping and the intended setting depth so the intake and motor remain correctly submerged.

The 4YS operating conditions give a maximum fluid temperature of 35°C and a minimum four-inch well; the product introduction says over 100 mm. Measure the clear bore with the cable and coupling allowance rather than assuming a nominal four-inch casing guarantees passage. IP68 does not establish an unlimited immersion depth or permission for hotter water.

The 4YS table lists motor shaft output, current and efficiency, not pump flow versus head. For the 1.5 kW comparison, choose the pump duty from its own curve and check the required shaft power against the selected motor over the operating range. An 80 m installation statement cannot be used as a promise that this motor-and-pump combination will deliver the required flow at 80 m head.

The casing and bottom support are listed as AISI 304 stainless steel; the top support has separate cast-copper-alloy, cast-iron and AISI 304 alternatives. The standard seal description is graphite–ceramic, with special seals available on request. Specify the actual water conditions and chosen construction; the range listing does not establish that every assembly has an all-stainless top or drinking-water certification.