... explosive places. Medium flow through the air inlet valves for steplessly. Diaphragm pump for the wearing parts ... paper industry: cooking liquid, bleach, paint, glue, etc.;3, the oil industry: all kinds of oil, fuel, chemicals ... 2, medium flow through the air inlet valves for stepless adjustment;3, self-lubricating, gas consumption is low, ... all kinds of corrosive media. one-way pneumatic diaphragm pumps