Trane SWT04798 SPDT Pressure Switch

The Trane SWT04798 Pressure Switch is a mechanical control part that measures the air or fluid pressure and closes a single-pole and double-throw contact when preset limits are exceeded in HVAC systems. It identifies the variation of pressure in ductwork or system piping and provides respective signals to control circuits to facilitate sequencing purposes. This switch is mounted either in line with the pressure tubing or at specific pressure points to ensure that proper monitoring is done. In HVAC systems, it is necessary to provide stable pressure in compatible forced-air, ventilation, and refrigeration systems.