PM 4” oil filled (4OM) submersible motors

External sleeve and bottom: made in AISI 304 stainless steel. More specifically, sleeve is made of AISI 304L (Low carbon) to avoid possible corrosions of the welding.

 Upper bracket: made in cast iron with cataphoresis treatment and protected with an AISI 304 stainless steel cover. Sleeve clam- ping is ensured by 4 inserts in low power motors and 6 inserts in motors bigger than 3 Hp.

Mechanical seal: made in graphite/ceramic in the standard version.

Ball bearing: duly oversized to ensure a long lasting motor.

Stator: with 24 slots, specifically developed to achieve maximum electrical yield. Airtight sealed and immerged in selected mineral white and highly refined oil, suitable to be used in drinking water (F.D.A., Food and Drug Administration, approved).

Removable power cable-connector: to ensure a perfect sealing, also in the most critical conditions, and to aid maintenance operations. More specifically, the connector prevents oil from rising in the conductors up to the joint, thus enabling immersion at greater depths. The power cable complies with all major standards on the use in drinking water (KTW, ACS, WRAS).

Shaft: made in carbon-steel alloys in the rotor area, to foster electrical features. AISI 304 stainless steel projection. DUPLEX, a special type of stainless steel, replaces AISI 304 in motors bigger than 3 Hp. This steel combines excellent resistance to corrosion and high mechanical resistance, which is necessary where static torque becomes really important.