Diaphragm pump, also known as the control pump, is the main type of actuator. By receiving the control signal output from the modulation unit, the fluid flow is changed by power operation. Diaphragm pumps generally consist of actuators and valves. Compressed air is used as a power source, and all kinds of corrosive liquids, liquids with particles, highly viscous, volatile, flammable, and highly toxic liquids can all be pumped out.
First, the diaphragm pump
The pneumatic diaphragm pump has four materials: plastic, aluminum alloy, cast iron, and stainless steel. The electric diaphragm pump has four materials: plastic, aluminum alloy, cast iron, and stainless steel. Diaphragm pump uses nitrile rubber, chloroprene rubber, fluorine rubber, polyvinylidene fluoride, polytetraethylene ethylene according to different liquid media. To meet the needs. Placed in a variety of special occasions, used to pump media that cannot be pumped by conventional pumps.
Second, the diaphragm pump category
Diaphragm pumps can be divided into pneumatic, electric, and hydraulic three types according to the power used by their actuators. That is, pneumatic diaphragm pumps with compressed air as the power source, electric diaphragm pumps with electric power as the source, and liquid media ( Such as oil, etc.) pressure-driven electro-hydraulic diaphragm pump.
The function of the diaphragm pump in the process control is to accept the control signal of the regulator or the computer, change the flow of the regulated medium, and maintain the adjusted parameter within the required range, so as to achieve the automation of the production process. If the automatic adjustment system is compared with the manual adjustment process, the detection unit is the human eye and the adjustment control unit is the human brain, then the execution unit - diaphragm pump is the human hand and foot. To achieve a certain process parameters such as temperature, pressure, flow, liquid level adjustment control, are inseparable from the diaphragm pump. Therefore, the correct choice of diaphragm pump is of great significance in process automation.