Common Questions: Which steam trap models use the A21348-1 gasket

high-capacity switching solution

The Buna-N (NBR) seals are optimized for air

supporting effective airflow across residential and light commercial equipment

Featuring a unique balanced valve design

ZoneFirst MST Damper Actuator 30067439-890 Common Questions: Which steam trapThe ZoneFirst MST Damper Actuator is a professional grade 24V damper motor engineered for reliable operation in forced air residential and light commercial HVAC zoning systems. This two position actuator operates on 24Vac with a high efficiency 6 watt power draw, ensuring minimal load on the HVAC zone control panel. Designed for a precise 30 second timing cycle for both opening and closing, the MST provides consistent airflow management and prevents