The B321 is compatible with LR

Multi-Speed Flexibility: Features 4-speed taps to optimize CFM for high-efficiency cooling and balanced heating stages

the Price Industries 019169-002 Motor is the verified OEM solution

sluggish response to pneumatic signal changes

Belimo NFB24-SR-S Actuator THPU32HP7Y The B321 is compatible withThe Belimo NFB24 SR S is a high performance spring return damper actuator engineered for reliable fail safe operation in HVAC systems. Delivering 90 in lb of torque, this proportional control actuator operates on a 2 10VDC control signal and is compatible with both 24VAC and 24VDC power supplies. Designed for demanding damper automation and valve linkage applications, it features a rugged NEMA 2 rated housing and integrated auxiliary switches for