Siemens launches high-thrust Simotics Vertical Solid Shaft (VSS) NEMA Premium motors. The HP100 and LP100 feature thrust capacity higher than industry standard, according to the company. The angular contact thrust bearings are located in the non-drive end of the motor where they receive maximum cooling from the motor fan. Users can more easily regrease or even change these bearings because of this design, according to Siemens.
Siemens VSS motors completely fulfill the requirements of API 610, according to the company, including low vibration, dimensions and tolerances, thrust bearing type and location, and combined thrust capacity and bearing life at 25,000 continuous operation hours. To reduce cost, construction to API 610 standards is available as an option. The motors also optionally meet the applicable requirements of IEEE 841. A non-reverse ratchet option is also available.
Simotics HP100 and LP100 motors have guaranteed efficiency ratings that exceed both NEMA Premium and the new DOE requirements, according to the company. Simotics VSS motors reportedly have a guaranteed minimum efficiency greater than 5% above the DOE minimum. All Simotics VSS motors are VFD rated for 20:1 turndown in variable torque applications.
The all-cast iron construction, oversized terminal box, bolted lifting eyes, corrosion resistant hardware and epoxy finish all provide long life and ease of use to the new motor series, according to the company. They are suited for demanding applications such as in-line pumps; booster, centrifugal and non-clog pumps; vertical turbine; mix flow; and propeller pumps. The motors are reportedly designed to stand up to the harshest environments in industries such as oil and gas, petrochemical, pulp and paper, water and wastewater treatment.