Pressure Switch 836T – Allen Bradley
The lever assembly also includes a virtually friction-free over-center toggle arrangement, providing
positive snap action to the contact block for long contact life. As pressure falls, force on the
differential spring increases and contacts return to their normal state — this is referred to as reset
setting. Varying the force of the main spring (by turning the operating range adjustment screw)
determines when the contacts will trip. Varying the force of the differential spring (by turning the
differential adjustment screw) determines when the contacts will reset. Setting trip and reset values
determines the operating parameters of the application.
Figure 2
Basic Mechanical Structure
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