Fema PTI16 pressure switch

The Fema PTI16 pressure switch, catalogue article 444.208.008, manufacturer code PTI16, is a component from the pressure switches category. Parts of this type serve to confirm that pressure or airflow in a burner or boiler system stays within a permitted band. When the measured pressure is correct, the pressure switch closes or opens a contact, giving the burner control permission to continue with the ignition or operation sequence. If pressure is too low or too high, the switch breaks the circuit and triggers a safety lockout. Pressure switches of this class are selected based on the medium they will monitor—air or gas—as well as the required switching range and differential (the difference between setpoint and reset point). The connection type, either a threaded port or a hose spigot, must match the impulse line. Contact rating and approval class (e.g., for gas safety) are also critical. Typical failure modes on such switches include a torn diaphragm, a blocked impulse tube, or a drifted setpoint; these often cause lockouts that can be mistaken for ignition problems. In a burner system, an air pressure switch proves that the fan is moving enough air during pre‑purge. A gas pressure switch guards both minimum and maximum gas pressure upstream of the gas valve. When replacing a pressure switch of this type, verify that the new unit’s switching range, differential, and connection match the original, and check the impulse line for blockages or moisture. The Fema PTI16 is listed under the Fema brand; its exact specifications should be confirmed from the manufacturer’s data sheet.