Manual PP/PVC Dampers & Valves

Manual PP/PVC Air Dampers & Butterfly Valves for Ventilation Flow Control

Manual PP and PVC dampers provide simple, reliable airflow balancing for corrosive exhaust and ventilation systems. Lever-operated and gear-operated options from DN50 to DN2000. Manual dampers are the most cost-effective solution for systems that require occasional balancing rather than continuous modulation — typically 60-70% lower installed cost than equivalent motorized dampers.

Specification Options
Diameter DN50-DN2000
Material PP body + PP disc, PVC body + PVC disc
Operation Lever handle (DN50-DN300), gear operator (DN350+)
Seal EPDM (standard), FKM/Viton (solvent-resistant)
Locking Lockable handle positions (set and forget)

Manual vs electric dampers — when does manual make sense?

Manual dampers suit: (1) systems with fixed airflow requirements where balancing is done once during commissioning, (2) isolation dampers for equipment maintenance access, (3) budget-sensitive projects where automation is not required. If airflow needs change based on production schedule, occupancy, or process variations, electric dampers with BMS integration provide energy savings that typically recover the cost difference within 12-18 months.

Frequently Asked Questions

Can manual dampers be upgraded to electric later?

Yes. The damper body and disc are standard; the actuator mounting flange accepts both manual operators and electric actuators. Upgrade path: remove manual operator, mount electric actuator with appropriate bracket.

What is the pressure rating?

Standard PP dampers rated to 1,500 Pa differential pressure up to DN600. Larger diameters or higher pressures use reinforced disc and shaft. For pressures above 3,000 Pa, specify heavy-duty construction.

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