turndown ratio

基本解釋

The results show that valve-sieve compound trays have smaller turndown ratio and smaller capacity.
試驗結果表明：浮閥篩孔復合塔板操作彈性小、氣液處理量?。?/li>
Used with most commercial gases. Wide turndown range, maintaining pre-set air-gas ratio, for single or multiple burner arrangements.
可作為基本單元或者和其他配件配合使用，適合大多數商業(yè)燃氣使用。
chinaburner.com
Double hole diameters compound trays have a little larger capacity in comparison of single hole diameter compound trays and their turndown ratio is over 3.5.
雙孔徑復合塔板比單孔徑復合塔板處理量略微增大，操作彈性高達3.5以上。