If your application exceeds this

it is a direct technical match for HKN-0734-3 and HKN-734-3 part numbers

With a 3/4" stroke and spring return stem up configuration

Can this spring be used with both Natural Gas and Propane (LP)

These probe-type controls are compatible with most residential and light commercial steam boilers

Reznor 213581 Controller 30067439-890 If your application exceeds thisThe Reznor 213581 is a high performance OEM speed controller designed for precise HVAC airflow management in commercial and industrial heating applications. Engineered for 230V 60Hz electrical configurations, this solid state motor control allows for the manual or automated adjustment of blower speeds to optimize thermal efficiency and reduce acoustic levels during operation. By regulating the voltage to the fan motor, the Reznor 213581 Speed