Priority valves

  • Overview

Dependable flow on demand

Available in three sizes, Danfoss load-sensing priority valves provide dependable flow on demand for steering, braking or other priority functions, while allowing excess flow to be used for auxiliary functions.

  • Function - Dependable flow on demand
  • Flow rating - Up to 240 L/min (63 gal/min)

System design

Danfoss priority valves can be used with open center, closed center or load-sensing systems. Use in an open center system with a fixed displacement pump, or a closed center system with a pressure compensated pump, offers many of the features of a load-sensing system.

There are two types of load-sensing signal systems: static and dynamic.

  • In a static signal system, the pump and priority valve sense a static pressure in the sensing line. Static signal systems are used for conventional applications in which response or circuit stability is not a problem.
  • In a dynamic signal system, the pump and priority valve sense boosted pressure in the load-sensing line caused by the spring and a small amount of flow through the dynamic signal orifice from the control flow line. Used with fixed or variable displacement pumps, the dynamic signal system offers several advantages, including faster steering response, improved cold weather startup performance and increased flexibility to optimize system performance and stability.
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