Kinetrol has just released the new Model 15 Spring Unit which consists of a new single spring in a sealed, non-breathing housing, rather than the Model 15*-0*0-5900 which consists of two model 14 springs.
The new spring design has significant benefits including over a 30% reduction in weight, over 25% reduction in the axial dimension and an increase in the pressure range from 3.5 Bar to 5.5 Bar.
The spring unit is available in both male and female drive (F14 with a 36mm A/F female square) and will retrofit to all Model 15 Actuators.