eCaps_Icon

Tunnel Dampers

Dampers that meet the rigorous environment of transit tunnel air applications.

A tunnel transit damper is a heavy-duty flanged air damper designed to meet the rigorous environment of a transit tunnel. It is qualified to withstand the stresses and pressures of such environments. It meets the requirements of NFPA-130, NFPA-502, UL 555S, and BS476 standards.

HTD-621

Features a single thickness with reinforcement flat blade and meets National Fire Protection (NFPA-130 and 502).

VIEW HTD-621
https://catalog-api.greenheck.com/api/product/en-us/666

HTD-630

Features a fabricated airfoil blade with pressure up to 24 in. wg, velocity up to 4000 fpm and fatigue at 8 million reverse cycles at 24 in. wg.

VIEW HTD-630
https://catalog-api.greenheck.com/api/product/en-us/171

HTD-636

Features a fire related fabricated airfoil blade with a British Standard 476 certification.

VIEW HTD-636
https://catalog-api.greenheck.com/api/product/en-us/170

HTD-640

Features an aluminum extruded airfoil blade and meets National Fire Protection Association (NFPA-130 and 502).

VIEW HTD-640
https://catalog-api.greenheck.com/api/product/en-us/169