The INV-BS Self Priming Flexible Impeller Pump Series is a simplified and more cost-effective alternative to the INV series. It is characterised by featuring either the close-coupled MINOR 40 or MAJOR 60 pump units fitted with forced ventilated motors onto a 2 wheel trolley system. All flow control is located on the control panel and dry run protection isn’t featured. Speed adjustment range has been limited to 175 – 1400 rpm due to the absence of a gearbox, as opposed to a minimum speed of 50 rpm capable with the INV series. Due to the 4 kW inverter drive system, feeding supply for both models needs to be 400V three-phase. Manual or Spring Loaded By-Passes are also available on request.