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FRP Damper Valves

FRP damper valves are flow-control devices in FGD ductwork and scrubbers. They regulate flue gas flow or isolate sections of the system. FRP dampers are constructed from fiberglass-reinforced plastic parts (blade and housing) suitable for corrosive airstreams. In many cases, they are FRP/PP or FRP/FRP knife gate or butterfly dampers. These valves provide the needed flow modulation without the rust issues of steel dampers.

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Key Features

Fiberglass Construction: Entire valve body and blade made of FRP or FRP-lined components.
Sealed Design: Elastomeric seals or PTFE edges ensure tight shutoff for diverting flows.
Actuation: Can be manual (handwheel) or actuated (pneumatic or electric).
Low Torque: Lightweight FRP results in lower actuation torque than steel.

Benefits

Corrosion-Free Operation: FRP dampers last much longer than metal ones in FGD atmosphere.
Balanced Control: Precisely control gas bypasses or distribute gas in multistage scrubbers.
Safety: Non-sparking FRP reduces ignition risk; chemical inertness protects against process leaks.

Applications

Used in FGD systems at the absorber inlet/outlet, in bypass stacks, or to isolate scrubber units. Also in duct diversion to by-pass scrubbers or reroute gas during maintenance. FRP knife gates and butterfly dampers prevent corrosion in humid, acidic flue gas vents.

Technical Specifications

Pressure Class: Typically designed for ±1″ w.g. to +10″ w.g. (depending on system pressure).
Flange Standards: ANSI or DIN flange drilling for integration with FRP duct.
Finish: Spray-coated or gelcoated for UV and abrasion protection.

Unique Selling Points

We provide FRP damper valves rated for FGD environments. Systech Design notes that FRP dampers are “vital” for corrosive fume applications. Our dampers use FRP blades and housings, eliminating all contact of metal with the gas. We offer knife gate, butterfly, and slide gate styles, all optimized for low-profile installation in FRP ducting.