Diaphragm pump and plunger pump performance comparison：
High pressure airless spraying has high efficiency, fine surface, strong adhesion, less coating loss and is widely used in construction, machinery, ships, furniture and other industries.
High pressure airless spraying machine is divided into pneumatic airless spraying machine, electric airless spraying machine (plunger pump) and electric airless spraying machine (diaphragm pump). Because pneumatic airless spraying machine needs to bring compressed air source, the use of pneumatic spraying machine is limited.
Now only the electric plunger airless spray machine and electric pneumatic diaphragm pump airless spray machine for comparison, plunger pump will be driven by the DC motor to drive the paint inhalation, pressure back out, because the plunger exposed, and the plunger work in the paint, in the coating grinding under the plunger wear very fast, once equipped with a large diameter nozzle, the plunger reciprocating frequency increases, aggravate the plunger wear, The machine has a short life. The replacement of the plunger price is very expensive, if the voltage is not normal will directly lead to the working DC is not normal. In addition, due to the large reciprocating motion, the working pulsation of the plunger pump is very large, which makes the spraying unstable, and the flatness of the wall sprayed by the paint is not good enough. But the plunger pump initial suction faster is its advantage.
Diaphragm type airless spray machine (diaphragm pump), its design is based on the plunger pump has been more improved, the principle is driven by electric motor piston reciprocating work (note, the piston does not directly contact the paint), and then promote the diaphragm movement, the paint is absorbed and pressed out, through the nozzle spray to the coating object, because its piston in anti-wear oil work, the working environment is greatly optimized, Life is greatly improved, after the penetration hardening treatment of the piston is not easy to damage, coupled with high resistance of polymer materials made of the membrane to further improve the life of the diaphragm pump. Reliable operation is another advantage of diaphragm pump, the failure rate is extremely bottom, the voltage requirements of the bottom, the environmental requirements of the bottom, easy maintenance, maintenance costs are only about one-fifth of the plunger pump.
Diaphragm pump cost-effective, its excellent performance price ratio will promote the promotion of diaphragm pump.
