Logic Elements

The multi-purpose differential sensing valves and pressure compensators in our logic elements range are designed to team up with other cartridge valves — creating countless circuits for superb pressure, flow and direction control.

For more detailed technical information, view our quick reference guide (PDF 3 MB) and circuit examples (PDF 3 MB).

 

Differential Sensing Valves, Poppet Type

Differential Sensing Valves, Poppet Type Example Schematic

On/off, low leakage design using “pilot to close” or “vent to open” functions to control the flow between ports 1 and 2. The valve is piloted (or vented) to function as a directional control valve, with low leakage. Flow range: 80-160 l/min [21-42 US gal/min]. Pressure capability up to 315 bar [4,500 psi].

 

Differential Sensing Valves, Spool Type

Differential Sensing Valves, Spool Type Example Schematic

Three-ported design using a pressure differential across the spool to modulate the flow/pressure from ports 1 to 2, available in “normally open” or “normally closed” with pilot or venting to control the modulation. Commonly used for unloading, flow control (pressure compensating), pressure relieving, and sequencing circuits. Flow range: 75-190 l/min [20-50 US gal/min]. Pressure capability up to 315 bar [4,500 psi].

 

Pressure Compensators, Restrictive Type

Pressure Compensators, Restrictive Type Example Schematic

Three-ported design using a pressure differential across the spool to modulate the flow from ports 3 to 2 by maintaining a constant pressure drop across an external orifice (or needle valve) between ports 3 and 1. Commonly used for meter-in or meter-out circuits to control actuator speeds, for example in load-lowering applications. Flow range: 90-284 l/min [24-75 US gal/min]. Pressure capability up to 315 bar [4,500 psi].

 

Pressure Compensators, Priority Type

Pressure Compensators, Priority Type Example Schematic

Four-ported design using a pressure differential across the spool to modulate the flow from ports 4 to 3 by maintaining a constant pressure drop across an external orifice (or needle valve) between ports 4 and 1. Remaining flow is available for use from port 2. Commonly used to direct fixed flow to a priority function or circuit, while making secondary flow available to other intermittent functions or the tank. Flow range: 60-340 l/min [16-90 US gal/min]. Pressure capability up to 315 bar [4,500 psi].

 

Load Sense, Priority

Load Sense, Priority Example Schematic

Four-ported, static load sense design that provides flow from ports 3 to 2 based on the load sense pilot pressure to the load sense port. Remaining flow is available for use from port 4. Commonly used in load sense circuits, providing priority flow to the main function, such as steering, while making secondary flow available to other intermittent functions or to tank. Flow range: 75-200 l/min [20-53 US gal/min]. Pressure capability up to 210 bar [3,000 psi].