Pressure independent,shutoff type design,multi-controls with choice.
22 gauge Galvanized steel construction.
Plenum box insulation is 1¡± thick,48kg density,air erosion resistant,neoprene coated fiber glass and complies with UL-181 and NFPA-90A requirements.
Double membrane galvanized steel blades with high density polyethylene gaskets provid full diameter contact seal that maintains less than 1% leakage at 4 in-wg.
Precision machined,plated steel drive shafts with blade position indicating grooves are provided with long life molded synthetic bearings.
Metal controls enclosure.
Multi-point inlet velocity sensors.
Optional features include:
