the Sporlan A3F1 provides the reliability field technicians require for critical system maintenance

Whether you are performing a TXV orifice replacement or a new system HVAC expansion valve sizing

covering both 5000 and older 1000 series (with mounting screws) valve applications

it is also rated for 1 HP at 120V AC and 2 HP at 277V AC

Precision 24V Control: The 24-volt coil ensures reliable engagement even during slight voltage fluctuations in the control transformer

Allanson Transformers 421-BT290 Transformer Els PW 17895 the Sporlan A3F1 provides theThe Allanson 421 BT290 is a heavy duty universal ignition transformer engineered for high performance oil burner service and replacement applications. Operating on a 120Vac supply voltage, this unit delivers a consistent 10,000Vac secondary voltage at 23mA, ensuring reliable arc initiation even in demanding environments. Designed with a mid point ground and a durable internal junction box, it simplifies field wiring while maintaining electrical