Pressure Relief Damper PRD Series 50-100

FRAME : BUILT OF 18 GA.(1.2MM THK) GALV. STEEL, G90. BLADES : BUILT OF 0.75MM MILL FINISH ALUMINUM SHEET. LINKAGE : GALVANIZED STEEL SHEET 28MM X 22 GAUGE. GASKET : SEALING STRIP ON BLADES IN FOAM GASKET. BEARING : BEARING SECTION IN PLASTIC 6MM. SHAFTS : BLADE STUB SHAFT IN BRASS