The Bell & Gossett HYDROVAR HVL pump controller, combined with the Series e-1510 base-mounted end suction pump, provides flexibility and efficiency for new and retrofit applications in buildings, utilities and general industry. The intelligent variable speed controller, when paired with an existing system, creates a highly energy-efficient pump and drive package that matches system performance to demand. With its space-saving design, the controller mounts easily on any standard TEFC NEMA pump motor. With built-in application software, the controller is easy to commission, program and operate, for nearly any configuration of pumps, up to eight pumps. Bell & Gossett.