Sequence Valves

Objectives

Demonstrate how sequence valves function
Explain common uses of sequence valves

What Is It?

The sequence valve is basically just a relief valve that relieves from one part of a pressurized circuit to the next instead of relieving to tank.

This is a useful function where no flow should be provided to a sub-circuit until pressure rises to a specified level in the main circuit.

Schematic Symbols

The symbol for a sequence valve is the same as it is for a relief valve. However, in the case of a sequence valve, the B port will not be directed to tank.

B leads to the subcircuit controlled by the sequence valve

Sequence Valve example #1

B leads to the subcircuit controlled by the sequence valve

Sequence Valve example #2

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We hope you enjoyed Sequence Valves

Vacuum Pressure

Drain Pressure

Low Pressure

Medium Pressure

High Pressure

Ground/Common

Lowest Voltage

Medium Voltage

Highest Voltage

Magnetic Field