New drive system for diaphragm metering pumps
This company’s ecodos series of diaphragm pumps (photo) now include a new form of wide-range speed control. Alongside asynchronous motors and servomotors, permanent-magnet synchronous motors (PMSMs), are also used now. They are characterized by high energy efficiency and a control range greater than 1:200. This significantly expands the range of applications. With PMSMs, it is no longer necessary to use several pumps for different flowrates or oversize asynchronous motors for low speeds. Since PMSMs can be designed without a fan, they are compact and easy to clean, which makes them suitable for hygienic applications. All materials in contact with the fluids used in the pump units meet FDA and USP Class VI requirements, and the E.U. directives for the food industry. High efficiency rating over the complete control range, in accordance with energy efficiency class IE5+, also reduces energy costs, thus ensuring a lower total cost of ownership. — LEWA GmbH, Leonberg, Germany