Mini steering unit Axial Ports – STM

Small steering valve for agriculture, material handling, gardening and construction equipment, and marine applications.


The STM is a small and low weight steering valve designed for compact utility tractors, turf care machines and utility vehicles.


It can be used with an add-on steering column or with a steering wheel connected directly to the power steering output shaft. Special high corrosion resistance treatments are available for boats and marine applications.


This steering unit features:

  • Axial Oil ports with integrated fittings
  • Low Noise
  • Wide range of configurations

Technical features

Displacement 20-100 cm³

(1,22-6,10 in³/rev)

Flow, recommended 3-20l/min

(0,79-5,28 US Gal/min)

Maximum steering pressure 150bar 


Maximum back pressure  20bar 


Small dimensions and low weight

Rear oil ports

Low steering torque From 0,5 to 2 Nm

(4,43 to 17,70 lbf·in)

Built-in valve functions Relief valve, shock valves, suction valves, check valve in P line and in LS line

Possibility of integrated steering column

Low noise 

Spare parts available

Seal kit

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