Introduce AODD pump:
Diaphragm pumps are based on reciprocating piston pumps and evolved by adding diaphragm chambers. By receiving the control signal output by the modulation unit, the fluid flow can be changed by power operation. The power often used is air, electric device, liquid medium, etc.
The pneumatic diaphragm pump uses compressed air as the power source. It is a positive displacement pump whose volume changes due to the reciprocating deformation of the diaphragm. Its working principle is similar to that of a plunger pump. SAIKEN Pump Industry will introduce to you
The motor on the electric diaphragm pump drives the diaphragms on the left and right plungers to reciprocate one after the other through the reduction box. In the two pump chambers on the left and right, the movement of the diaphragms of the upper and lower four one-way ball valves causes the volume change in the working chamber, forcing the four one-way ball valves to open and close alternately, so as to continuously suck and discharge the liquid.
Pneumatic double diaphragm pump is only double diaphragm pump refers to double suction chamber, single diaphragm pump has one suction chamber. However, the pressure of the diaphragm pump cannot be increased and is limited by the pressure of the air source. Diaphragm pump flow is usually not too large, most of which are used in small systems. It is different from traditional centrifugal pumps used in large flow.
The selection of the valve body type of the diaphragm pump is the most important link in the selection of the diaphragm pump. There are many types of diaphragm pump valve bodies. Commonly used are straight single-seat, straight double-seat, angular, diaphragm, small flow, three-way, eccentric rotation, butterfly, sleeve, spherical, etc. 10 types. Before selecting a valve, it is necessary to carefully analyze the medium, process conditions and parameters of the control process, collect enough data, understand the system’s requirements for the diaphragm pump, and determine the type of valve to be used based on the collected data. In the specific selection, the following aspects can be considered:
(1) The spool shape and structure are mainly considered based on the selected flow characteristics and unbalanced force.
(2) Wear resistance. When the fluid medium is a suspension containing a high concentration of abrasive particles, the valve core and valve seat joint surface will be severely rubbed every time it is closed. Therefore, the flow path of the valve must be smooth, and the internal material of the valve must be hard.
(3) Corrosion resistance. Due to the corrosive nature of the medium, a valve with a simple structure should be selected as far as possible if the adjustment function can be met.
(4) The temperature and pressure of the medium. When the temperature and pressure of the medium are high and the changes are large, the valve core and valve seat materials should be selected with small changes in temperature and pressure.
(5) Prevent flashing and cavitation. Flashing and cavitation only occur in liquid media. In the actual production process, flashing and cavitation not only affect the calculation of the flow coefficient, but also cause vibration and noise, which will shorten the service life of the valve. Therefore, when selecting the valve, prevent the valve from flashing and cavitation.
Diaphragm pumps can absorb all kinds of corrosive liquids, liquids with particles, high-viscosity, volatile, flammable, and highly toxic liquids. It is reliable and low-cost to use pneumatic pumps in flammable and explosive environments, such as the transportation of fuel, gunpowder, and explosives. It can still work stably in harsh places such as construction sites and industrial and mining wastewater discharge environments.
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