These vertical pump motors have a unique cooling method
Designed with durable construction to meet the requirements of a wide range of vertical hollow- and solid-shaft motor applications, the Ultra Series vertical pump motors (photo) feature a patented method for air-cooling of bearings in larger-frame totally enclosed fan-cooled (TEFC) motors. According to the company, the design improvements result in an approximately 30˚C temperature reduction, helping to dramatically extend bearing and winding life. The Ultra Series vertical pump motors are fully inverter-duty, and exceed NEMA MG1-31 requirements. Ultra Series vertical pump motors have a full cast-iron frame, inline, high-thrust space heaters and a non-reverse ratchet. These high-thrust vertical pump motors have, on average, 20% higher thrust and extended performance compared to similar product in the industry, the company says. The hollow-shaft high-thrust design is intended for deep-well pump applications. Solid shaft motors are designed to operate in pump applications including inline, booster, centrifugal, non-clog and vertical turbines under extreme conditions for the petrochemical, pulp and paper, waste-water treatment and material processing industries. — Wolong Electric America, Houston, Tex.