1:QBK-15 Pneumatic Diaphragm Pump 2:Caliber:10mm,15mm,25mm,40mm,50mm,65mm,80mm,100mm ... operated diaphragm pumps is the third generation of pneumatic diaphragm pump,with the trait of long life and low malfunction.It ... some uneasy flowed medium,with the merits of self-pumping pump,diving pump,shield pump,slurry pump and impurity pump,etc. QBK-15 Pneumatic Diaphragm ...