Zonefirst SPRD-9 Damper Els PW 17895 from 100 to 400 models

from 100 to 400 models

For liquid propane applications

45" OD sheave is designed for standard A-section or 4L profile V-belts commonly used in commercial ventilation systems

While the adapter provides the physical connection

Zonefirst SPRD-9 Damper Els PW 17895 from 100 to 400 modelsThe Zonefirst SPRD 9 is a professional grade 9 inch round barometric static pressure regulating damper engineered for precise HVAC bypass management in multi zone systems. This mechanical, non electrical component utilizes a weighted counter balance arm to automatically relieve excessive static pressure as individual zone dampers close. When the air pressure in the supply plenum exceeds your calibrated setpoint, the damper blade opens to bypass air