The Märkisches Werk GmbH (MWH) ball spring rotator (BSR) is a device developed to improve the quality and function of the proven ball and spring rotation mechanism. It provides reliable valve rotation for many operating hours. Simplex-Turbulo has added the BSR valve rotator to their range of spare parts and Richard Blair, who is responsible for their purchase, is very excited about this particular component, developed as a result of specific requests from customers for a more robust and reliable rotator.