MAIN TECHNICAL PARAMETERS Air leakage rate <Pressure difference 300Pa>：≤700m3/m2.h STRUCTURE Main components: Valve body, valve blade, shaft, shaft bushing, handleAirduct size & valve body thickness: L=200mmFor Φ800, a square-to-roundadapter is required, L=350mm. PERFORMANCE It is normally open, can be manually opened or closed, and is equippedwith a 6-speed air volume adiustment switch.
