Introduces the advantages and disadvantages of electric diaphragm pump and plunger pump comparison ( 2)

with rotating eccentric bearing, purchase higher interest diaphragm pump using eccentric bearing and piston movement to drive the movement of diaphragm and pressurize coating. When the motor rotation. One end of the piston to rely on on the eccentric bearing. The rotation of the eccentric bearing, the piston moves up and down, when the piston downward, the diaphragm is under pressure, inlet pneumatic valve open absorption material. When the piston, diaphragm is on top, imported pneumatic valve closed, open the inlet pneumatic valve, pressure coating. Whole process by diaphragm shake of absorb and generate pressure, asked the diaphragm in a high-pressure environment fluctuation more than once per minute, the diaphragm, such as easy to damage!
plunger pump and electric diaphragm pump advantages disadvantages compared
appearance is exquisite and smooth, high-pressure airless spraying, high efficiency. Less waste of adhesion, coating and construction, machinery, ships, furniture and other industries widely used.
high-pressure airless spraying machine can be divided into pneumatic airless spraying machine ( Pneumatic diaphragm pump) Electric airless spraying machine ( Plunger pump and electric diaphragm pump) Due to the pneumatic airless spraying machine needs with compressed air source and limit the use of pneumatic spray machine.
now only compared plunger pump and electric diaphragm pump
the back pressure, plunger pump is a dc motor drives the plunger motion will paint inhalation. Due to its plunger bare, and the plunger in the paint, paint grinding under the action of plunger wear very quickly, once equipped with large diameter nozzle, the plunger reciprocating frequency increase, plunger wear, and the machine life is short. And change the plunger price is very high, if the voltage is not normal work will directly lead to direct current (dc) is not normal. In addition, due to the large reciprocating movement back and forth, plunger pump work fluctuation is very big, makes the coating is not stable, spray coating on the metope of the flatness is not good enough. But the plunger pump initial material faster absorption is its strengths.
principle work for electric motor to drive the piston reciprocating ( Note that electric diaphragm type airless spraying machine ( The diaphragm pump) The design is based on the plunger pump more improvement. The piston is not direct contact with the coating) To push the diaphragm movement, to absorb the paint after pressure, through the nozzle spray painting objects, because of its oil in the piston abrasion work, working environment optimization greatly, greatly improve the service life, after mixing through hardening treatment of the piston is not easy to damage, plus the high polymer material made of high ground diaphragm to further improve the diaphragm pump life. Reliable operation is another advantage of diaphragm pump, failure rate is extremely bottom, bottom to voltage requirement, the environmental requirements, easy maintenance, maintenance cost is only about one 5 of the plunger pump.
the following is a list of the advantages and disadvantages of two kinds of pump:
advantage of electric diaphragm pump:
pressure control is good, the whole pressure range. Applicable to the texture, such as water of large capacity transmission;
buying interest is low.
electric diaphragm pump disadvantage:
to continuous work from time to time;
cavitation - easy to occur The air into the pump, Usually caused by the power of the pump coating is not enough of absorb more difficult.
can't dispose of high viscosity coatings ( As mentioned above the
must clean ( Small moving parts
the hydraulic oil is easy to leak.
the advantage of plunger pump:
can be easily disposed of high viscosity coating;
the nozzle under the same conditions can produce higher pressure atomization is better;
can work for long time, Hours of work
more able to withstand hard use environment;
easy maintenance; Low maintenance cost.
of absorb easily;
just run for spraying.
plunger pump disadvantage:
manufacture higher interest;