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.