4TW Submersible Motor Submersible motors 4TW 4” submersible asynchronous two-pole electric motor made entirely of AISI 304 stainless steel for the parts in contact with water.The 4TWX version entirely in AISI 316 stainless steel is available on request. Flanging: NEMA 4”. Protection class: IP68. Max operating depth: 300 m. Max. starts: 20/h. 4TW Technical sheet 4TW Instructions