This TXV orifice assembly is critical for maintaining accurate refrigerant flow control in high-capacity air conditioning and commercial refrigeration systems

this switch is frequently utilized in both heat pump and air conditioning circuits where precise temperature monitoring is required to trigger or terminate specific operation cycles

and a high-visibility position indicator

70A Overcurrent Protection: Specifically calibrated for heavy-duty HVAC loads to prevent equipment overheating and potential fire hazards

This OEM replacement part is configured as a normally closed (NC) auto-reset limit switch

Utica-Dunkirk 18682 Pressure Switch 322056-301 This TXV orifice assembly isThe Utica Dunkirk 18682 Pressure Switch is a critical safety component engineered for precise combustion air proving in high efficiency boilers and furnaces. Rated at . 60" WC (Water Column), this normally open (NO) switch is factory calibrated to ensure the inducer fan generates sufficient static pressure before allowing the ignition sequence to proceed. As a veteran technician knows, maintaining the correct differential pressure is non negotiable