• Valve rotators

Valve rotators

Rotocap-type valve rotators

Simplex-Turbulo sells the standard rotocap-type valve rotators. These rotators reduce carbon deposits on the valve and prevent carbon build-up on the valve seat. They also prevent burning and guttering of the valve face and seat. They are easy to replace and allow for longer engine service intervals. Overall they extend the life of key engine and valve gear components.

BSR valve rotators

The Märkisches Werk Innovation Centre has been improving the ball and spring rotation (BSR) mechanism of valve rotators for some years now. They are designed to be directly fitted onto the engine without modifications. They are precision crafted in Germany to exacting tolerances, using optimised designs and premium materials. Consistent valve rotation is critical to the performance and longevity of the valve spindle and seat ring. Steady valve rotation ensures a uniform temperature distribution around the valve head and prevents localised stress risers and wear spots which can dramatically shorten component life. These BSRs outperform standard valve rotators and provide higher valve rotation speeds over the entire operating range of the engine. This ensures that sufficient valve rotation is produced even at low engine speeds and under adverse conditions. By extending the useful life of the valve spindle and seat ring, these BSRs reduce the lifecycle costs of the engine.


The Turnomat rotator is the most sophisticated and effective of the rotators, significantly improving the economic efficiency of both diesel and gas engines. The design of the Turnomat ensures:

  • compulsory rotation of the valve spindle during the entire closing operation
  • assured rotation of the valve spindle over the complete speed range, regardless of the actual load
  • predefined rotation energy of the valve spindle at the moment of closing
  • a polishing effect between the valve spindle and the valve seat ring which rubs off deposits.

This results in:

  • a reduction of the temperature level of the valve spindle
  • uniform temperature distribution in the valve head and over the valve seat
  • reduction and even distribution of thermal stress
  • improvement of the heat exchange between valve spindle and valve seat
  • limitation of corrosion
  • avoidance of deposits on the seat surfaces.


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