These adjustable butterfly dampers are designed for precise airflow control in highly corrosive air handling systems. Constructed with a PVC body, damper plate, and shaft, they provide excellent resistance to acids, alkalis, salts, and chemical vapors. Stainless steel locking hardware ensures secure positioning, while the adjustable quadrant allows the damper to be set and maintained at the desired airflow level. Suitable for use with round Schedule 40 PVC ducting, these dampers can be installed in either vertical or horizontal orientations for flexible system integration. Designed for durability and performance, they offer minimal airflow restriction and a tight seal for efficient operation in demanding environments. This damper is compatible with select Plastec Ventilation Exhaust Fan Blowers, Item numbers 98890, 98891, 98892, 98893, 98894, 98906.
- PVC body, blade & shaft; Stainless steel locking quadrant & hardware
- All-plastic internal parts resist corrosive fumes & chemicals
- Adjustable design allows precise airflow control
- 8-position self-locked knob; Holds set position securely with locking mechanism
- Less than 5% airflow restriction for efficient performance
- Approximate 95% seal for improved system protection
- 90° damper plate operation; Installs vertically or horizontally
- Compatible with Schedule 40 PVC duct systems & select Plastec Ventilation exhaust fan blowers
- Wall thickness: 0.1"; Dimensions: 250mm (9.84") ID x 8.86" Hgt.
- Max. temperature: 140°F