This CR Optima Series model features a robust internal motor protection system and sweat connections

The ASCO 323-480 Rebuild Kit is a comprehensive maintenance solution designed specifically for 3-Way Solenoid Valves within the 8320 series

and Arcocoaire

or excessive vibration from an unbalanced blower wheel

Siemens Building Technology 332-2973 Actuator L99H008 This CR Optima Series modelThe Siemens 332 2973 Actuator is a rugged, No. 4 pneumatic damper actuator designed for reliable control of HVAC dampers and mixing box units. Engineered with a durable all metal body and an ozone resistant EPDM rolling diaphragm, this piston type actuator provides consistent performance in demanding commercial environments. It features an 8 13 psi nominal spring range and a 4 inch stroke, making it the primary direct replacement for MCP 1140 1520