QBY3-100Q 4 Inch Pneumatic Diaphragm Pumps,high Flow Water Pump Diaphragm Air Operated Vacuum Pump ,Not Damage Pump

No rotating parts, no shaft seal, the diaphragm completely separates the pumped medium from the moving parts of the pump, and will not leak out. And when pumping toxic, volatile or corrosive media, it will not cause environmental pollution and endanr personal safety; There is no need to use electricity. and it is safe and reliable to use inflammable and explosive places; Easy to use, reliable in work, just simply open and close the air supply valve when starting and stopping. Even if there is no medium running or sudden shutdown, it will not be damad. With self-protection performance, once overloaded, the pump will automatically stop, when the load returns to normal, it can automatically start; The pump does not need to be lubricated with oil, even if it is idling, it will not have any effect on the pump;