Piston pump and diaphragm pump airless sprayer more advantages and disadvantages

The following is a comparison of two types of pumps:

Diaphragm pump advantages: 1, in the entire pressure range, the pressure control is good, suitable for texture, water and other large-capacity transport; 2, the purchase of lower cost diaphragm pump. Disadvantages: 1, need continuous work; 2, high maintenance costs; 3, more difficult to absorb the material, prone to hole phenomenon - the air into the pump (usually due to pump delivery of paint is not enough power); 4, Can not handle high-viscosity paint (as described above); 5, must be kept clean (small moving parts); 6, requires constant maintenance; 7, hydraulic oil leakage;

Piston pump advantages: 1, can easily handle high-viscosity coatings; 2, the nozzle under the same conditions can produce higher pressure atomization better; 3, can be a long time work (24 hours of work); 4, Can withstand the harsh environment; 5, low maintenance costs, easy maintenance; 6, suction easily; 7, only when the required spraying operation.

Disadvantages: 1, higher manufacturing costs; 2, the higher cost of purchase Diaphragm pumps use eccentric bearings and piston movement to bring the diaphragm movement and to paint pressure. As the motor rotates, the eccentric bearings also rotate, one end of which rests on the eccentric bearing. Eccentric bearing rotation, so that the piston up and down movement, when the piston down, the diaphragm is depressed, the inlet valve to open the suction. When the piston goes up, the diaphragm is topped, the inlet valve is closed, the outlet valve is open, and the coating is pressed and fed. The whole process of absorbing and generating diaphragm pressure fluctuations require the diaphragm in the high-pressure environment fluctuates more than 1700 times per minute, resulting in easy to damage the diaphragm!

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