Two Pressure valve

A two pressure valve requires two pressurised inputs to allow an output from itself. This is achieved by a similar system to the one shown below, one active input slides the shuttle valve shut blocking any air flow, add two active inputs and the shuttle remains centralised allowing flow through the valve.

These valve types are commonly associated but not limited to safety circuits, for example a two push button operation system whereby an operator is required to use both hands to activate two push buttons, this would ensure the operators hands are out of reach of any hazardous operations.

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