KELAIR Products, Inc. is proud to announce our new, patent pending Modulation Vane Damper. This design boasts no external linkage, eliminating "pinch points" and complex, easily damaged external linkage. Our new, patent pending opposed blade internal gear drive assembly, easily allows straight through precise modulation capabilities in a compact round duct configuration. The result is better control, a cleaner and safer exterior look, and an affordable alternative to other styles of round or transitioned louvers .

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Standard designs suitable for 1 PSI Max diff. pressure, 4000 FPM, and 150 F process air temperature.