Pneumatic double diaphragm pump

口径25-100：

扬程50米

Pneumatic double diaphragm pumps use compressed air as the power source. The main directional (pneumatic) control valve distributes compressed air to the gas chamber, applying uniform pressure to the inner surface of the diaphragm. At the same time, the discharged gas is discharged from the rear of the other side of the pump through the guide port of the air valve assembly. When the gas pressure in the inner chamber of the pneumatic double diaphragm pump exceeds the pressure in the liquid chamber, the diaphragm connecting rod moves back and forth, discharging on one side and suctioning on the other side. The direction of discharge and suction of liquid is controlled by the direction of the check valve (ball valve or disc valve). The suction stroke causes the pump to perform suction. The suction stroke reduces chamber pressure and increases chamber volume. This creates an atmospheric pressure differential, pushing the liquid through the suction pipe, through the suction side check valve, and into the external liquid chamber. The suction side stroke also initiates the reciprocating (shift, stroke or cycle) motion of the pump. Pneumatic double diaphragm pumps move the suction diaphragm by mechanical pulling of the stroke. The inner plate of the pneumatic double diaphragm pump comes into contact with the aligned drive plunger, moving the guide spool. After the pilot valve is activated, it sends a pressure signal to the other end of the main directional air valve, and the pneumatic double-diaphragm pump changes the direction of the compressed air to the other side of the internal chamber. This repeated movement completes the continuous delivery of the medium.