The advantages and disadvantages of electric diaphragm pump and piston pump

Piston pumps and electric diaphragm pumps more advantages and disadvantages of the advantages of high pressure airless spray high efficiency, fine and smooth surface, strong adhesion, paint loss and get the building, machinery, ships, furniture and other industries widely used. High-pressure airless sprayer is divided into pneumatic airless sprayer (pneumatic diaphragm pump), electric airless sprayer (piston pump and electric diaphragm pump), because pneumatic airless sprayer need to bring compressed air source and limited Use of pneumatic sprayer. Piston pump is only compared with the electric diaphragm pump Piston pump is the DC motor driven piston reciprocating movement of the paint inhalation, pressure and discharge, due to its plunger exposed, and the plunger in the paint work in the paint grinding Under the action of plunger wear very fast, once equipped with a larger nozzle, the plunger reciprocating frequency increased, exacerbating the plunger wear, the machine life is short. The replacement of the plunger price is very expensive, if the voltage is not normal will also lead directly to the working DC is not normal. In addition, due to the large back and forth reciprocating motion, plunger pump work pulsation, making the spray instability, spray paint on the wall surface roughness is not good enough. However, the initial suction plunger pump is its strength. Electric diaphragm airless sprayer (diaphragm pump), the design is based on the plunger pump has been greatly improved, the principle is driven by a motor piston reciprocating work (note that the piston does not directly contact with the paint), and then push the diaphragm Movement, the paint will be launched after pressure absorption, spray nozzle through the painting objects, due to its piston in the anti-wear oil work environment greatly optimized, greatly improving life expectancy, after the penetration of hardened piston is not easy to damage, Coupled with high-resistant materials made of polymer membrane diaphragm diaphragm pump to further enhance the life expectancy. Reliable operation is another advantage of the diaphragm pump, the failure rate is extremely low, the voltage requirements at the end of the environmental requirements at the end, easy maintenance, maintenance costs only about one-fifth of the plunger pump. The following lists the advantages and disadvantages of two types of pumps: Electric 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 cost is lower. Disadvantages of electric diaphragm pump: 1, continuous work is required; 2, suction is more difficult, prone to hole phenomenon - the air into the pump (usually due to insufficient force pump delivery of paint); 3, can not handle high viscosity paint As described above); 4, must be kept clean (small moving parts); 5, easy to leak hydraulic oil. 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 work long hours (24 hours of work); 4, More able to withstand the harsh environment; 5, low maintenance costs, easy maintenance; 6, suction easily; 7, only when the required spraying operation. Disadvantages of the plunger pump: 1, higher manufacturing costs; 2, higher cost of ownership diaphragm pump eccentric piston bearing and the use of movement to bring the diaphragm movement and pressure to paint. 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!