PRODUCTS: Dampers
SPUNSTRAND DAMPERS

Capabilities and Variations
Spunstrand® Inc. manufactures both Zero-Leak (ZL) and Balancing Dampers (BA) for the corrosive fume handling industry for a variety of environments and applications. These dampers can be used to regulate air flow and/or isolate a particular part of a system. They are constructed of FRP providing a durable corrosion resistant product that can be used for numerous industrial applications such as: semiconductor manufacturing plants, wastewater treatment plants, pharmaceutical facilities, pulp and paper plants, metal plating ships and chemical facilities.
The FRP duct industry’s first Zero-Leak damper was installed in 1995 and patented by Spunstrand® Inc. . The damper was developed by Spunstrand® Inc.’s design team to be certified leak free through individual water testing. Each Spunstrand® Inc. ZL damper is manufactured with a resilient, machined rubber seat permanently formed into the duct wall. Balancing dampers are applicable where ultra low leakage is not critical. These leakage rates should not exceed 5%.
Why Spunstrand Zero-Leak and Balancing Dampers?
- Over forty years of FRP experience
- 100 millimeter RTP-1 quality clear liners
- Balancing dampers available in sizes 2″-96″ Ø
- Better workmanship, individually quality tested
- Delivered fully operational and tested
- Zero-Leak dampers available in sizes 8″–96″ Ø
- Resistant to corrosion and environmental wear
- Standard options other manufacturers charge for
Damper Applications:
- Wastewater treatment plants
- Laboratory exhaust
- Micro-electronic plants
- Aerospace industry
- Food processing facilities
- Petrochemical plants
- Glass and metal finishing
- Pulp and paper industry
- Automotive industry
Process Examples:
- Scrubber and fan isolation
- System balancing
- Automated processes modulation
- System cleaning
- Tool install or change out isolation
- System shutdown
- Clean room isolation
Spunstrand® Inc.’s Zero-Leak and Balancing series dampers are manufactured under an ISO 9000 based Quality Assurance program. All dampers are inspected for quality, blade fit, range of operation, and each Zero-Leak damper is tested and certified leak free to 6″ water column, and up to one psi when requested.
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