Airless piston pump VS airless diaphragm pump
| Advantages | Disadvantages | |
| Diaphragm Pump |
• Good, tight pressure control across a full range of pressures • High free-flow rates, good for high-volume transfer of fluids for texture applications, water, and so forth • Lower initial purchase price |
Runs continuously Higher maintenance costs Difficult to prime Cavitates easily-air is introduced into the system possibly causing erratic flow or spitting. This usually is because the pump isn’t strong enough to move the coating material. Poor performance with higher viscosity fluids as mentioned above Must be kept clean (small moving parts) Requires constant maintenance Hydraulic oil leakage Frequent diaphragm failure |
| Piston Pump paint sprayer |
Pumps higher-viscosity coatings with ease Provides higher pressure at common tip sizes Better atomization Allows the use of longer hoses Better withstands hard use Lower maintenance costs Easy to repair Primes easier Runs only on demand |
• Higher initial purchase price, but less expensive to maintain • Some pressure fluctuations, noticeable at low pressure settings |
above is the chart for piston vs diaphragm sprayer.
currently GRACO is most popular brand for the piston pump, and Wagner is most popular for the diaphragm pump.
We DP offer both piston pump & diaphragm pump, but we do sell more quantity of piston pump because it’s more powerful and easier to maintain / repair it when you face problem.
DP-6318(H) Electric Airless Paint Sprayer
DP6820 (1HP / 750 2.0L / min) Airless diaphragm pump
