which is critical for handling the side-loading tension of belt-driven blower pulleys

you should match the original RPM

upgrading the assembly to a lower-vibration standard

For Ammonia

including a durable piston assembly

Maxitrol AD1094C-1050 Amplifier and Selector Freon which is critical for handlingThe Maxitrol AD1094C 1050 is a high performance Series 94 amplifier and selector designed for precise temperature control in direct fired gas heating systems. Engineered to maintain stable atmospheric conditions, this unit features a wide setpoint range of 100 to 500 degrees Fahrenheit, making it a staple for industrial makeup air and process heating applications. As a critical component of the Selectra electronic gas modulation system, the AD1094C