Sun screw-in logic cartridges can be used to create a multitude of circuit functions for various hydraulic systems. They can be used in combinations to provide the functions of directional controls, flow controls, and pressure controls. Sun offers two functional categories of logic elements: 

MODULATING CARTRIDGES act as main stages for relief or pressure reducing functions. When used in conjunction with a fixed or variable orifice (flow control), or a proportional directional valve, they can act as restrictive or bypass type pressure compensators. 

SWITCHING CARTRIDGES are used to provide directional control functions. The use of switching cartridges offers reduced system size, fast response, very low leakage, contamination tolerance, and flexible controllability. In addition to the three familiar types of logic functions in common use today (normally open and normally closed modulating elements, and pilot-to-close switching elements, usually DIN slip-in style), Sun also offers pilot-to-open switching elements. These poppet type, or seated, valves will close and seal positively to both directions of flow in the absence of any pilot signal, allowing true blocked port logic valve circuitry. Sun switching elements are offered in both unbalanced an and balanced designs, further enhancing circuit design flexibility.

FIND THE LOGIC ELEMENT CARTRIDGES BASED ON YOUR APPLICATIONS: