Rovel gate valves by Officine Meccaniche Parenti belonging to this series are called Normally Open (N. O.), to indicate the type of command in rest position. By actioning the valve, it is possible to switch the valve causing the closing and therefore the blockage of the fluid.
In order to work correctly, it is necessary a minimum pressure differential (opening and closing without electric feeding). Excellent performances also in presence of low working pressures.