Steering valves

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Maximum safety

Steering comes first with our priority valves, for maximum safety on the road and on the job.

A Danfoss priority valve will always give your steering system precedence. That makes it an important safety feature on load-sensing hydraulic systems. There oil flow to the steering system and work hydraulics is supplied by just one pump.

Features and benefits

Low pressure drop for high fuel efficiency, low noise and stable operation

Available in static and dynamic versions

Dynamic flow gives a quick reaction time with no hard spot when initiating steering

Optional pilot pressure relief valve for OLS 160 and OLS 320

Our steering valve blocks meet control needs. This is when a steering unit without integrated valves is the best choice for your vehicle.


High-flow priority valve OLS 320
High-flow priority valves are needed especially for large tractors, wheel loaders, motor graders and container trucks.
The new Danfoss priority valve OLS 320 can fulfill demands from these applications. The priority valve OLS 320 is to be used in connection with Danfoss steering units. For example, type OSPC LS, OSPF LS, OSPD LS, OSPQ LS and OSPL LS in load sensing steering system with pump flow up to 320 l/min.
OLS 320 priority valve is available as in-line and flange-on versions for EHPS.
Pressure drop P-EF is very low, less than 6 bar at 320 l/min at EF load higher than spring force.


  • High flow capacity
  • Low pressure drop
  • Compact modular design
  • With or without built-in pilot pressure
    relief valve
  • Optional port connections
  • Available for both static and dynamic systems



The priority valve OLSP 80 is to be used in connection with e.g. Danfoss gear pumps type SNP. As well as, steering units type OSPC LS, OSPF LS, OSPD LS and OSPQ LS in load sensing steering systems. There maximum oil flow doesn’t exceed 80 l/min. OLSP priority valves are to be flanged on gear pumps with outlet ports square flange type 35. Versions Load sensing static priority valves Load sensing static steering units require load sensing static priority valves. Load sensing static steering systems have no oil flow in the LS connection. This is when the steering unit is in neutral position. Load sensing dynamic priority valves Load sensing dynamic steering units require load sensing dynamic priority valves. Load sensing dynamic steering systems have a constant oil flow in the LS connection from the priority valve to the steering unit. Even when the steering unit is in neutral position.


  • For flanging on pumps directly
  • Simplified installation
  • Compact design
  • Low pressure drop
  • Optional port connections
  • Available for both static and dynamic systems
OLSP Priority Valve


Type Name Language Valid for Updated Download File type
User guide OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers Technical Information Chinese (CN) China 10 Mar, 2015 4.5 MB .pdf
User guide OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers Technical Information German Germany 20 Apr, 2016 6.3 MB .pdf
User guide OSPB/C/F/D/L LS Steering Units, OLS Priority Valves, OSQ Flow Amplifiers Technical Information English Multiple 16 Apr, 2021 6.3 MB .pdf

Related products

  • Steering units
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    High performing hydraulic power steering units for all applications.

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    OSQ flow amplifiers featuring an integrated steering priority valve. Our OSQ flow amplifiers can be used with our OSPBX, OSPCX or OSPLX steering units.

Related applications

  • Agriculture

    Farmers need agricultural machines that deliver the same high productivity every season. Hydraulic solutions from Danfoss ensure world-class performance from each machine, and a comfortable, stress-free working environment for their operators.

  • Construction

    Space is limited on construction sites, and there are people working everywhere. Contractors need machines that can safely maneuver in a tight spot. At the same time they still need to be powerful enough to get the job done. At Danfoss, we deliver the components, software, and controls that enable your machines to run safely, efficiently and effectively.

  • Heavy machinery
    Heavy machinery

    Think about the heaviest challenges in the open mining, road building and construction industry. Tasks such as cutting through rock or the Arctic permafrost; compacting thick layers of hot asphalt. As well as lifting huge, prefabricated wall panels into place.

  • Road building
    Road building

    Advanced hydraulic systems from Danfoss deliver the machine performance that ensures road builders can meet their deadlines.

Related solutions

  • All-wheel steering
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    All-wheel steering is one example of how Danfoss is at the forefront of machine versatility. This helps customers getting the most out of their equipment. Electrohydraulic steering system enables operators to manually adjust the steering mode, allowing them to best match machine performance to the task at hand.

  • Auto-guided steering system
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    To remain competitive in today’s agricultural equipment market, OEMs are offering satellite-based, automatic steering solutions.

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    Danfoss continues to lead the way with advanced, electrohydraulic joystick steering solutions. These offer design flexibility for you, superior machine controllability and performance for your customers.

  • Quick steering
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    The ability to customize a machine’s steering ratio gives operators added precision while keeping them in ultimate control. At Danfoss, we call this dynamic steering ratio adjustment “quick steering.”

  • Steer-by-wire

    Our fail-safe steer-by-wire solutions allow you to remove the steering column. You can then replace it with smaller, precise steering mechanisms such as a joystick or mini-wheel.