Spray painting airless spray equipment may be powered by electric AC or DC motors, pneumatic compressed air reciprocating linear motors or pressurized hydraulic oil pumps. The majority of airless paint spray pumps these days are reciprocating double acting piston airless pumps where the piston using an inlet valve and outlet valve pressurizes and moves paint during both directional travels of the airless pump piston.
Older airless paint spray pump designs utilize a diaphragm in conjunction with a piston or in conjunction with hydraulic force to move the airless spray pump diaphragm.
The majority of electric powered piston airless spray pumps use a crankshaft in a gearbox connected to the paint piston pump. With electric powered piston airless spray pumps maximum paint pressure can usually only be controlled by either bypassing excess flow of paint, which can result in higher airless pump component wear, or by switching the electric motor on and off using a switching device that senses pressure such as a micro switch and device that moves in relation to internal pressure against the micro switch. Newer more advanced solid state pressure sensors coupled with solid state circuitry can now vary DC electric motor speed to slow or speed the electric motor in relation to paint flow demands.
Piston airless spray pumps powered by petrol motors usually use a DC electric clutch or a much better design for longevity and airless pump control is the petrol engined hydraulic airless paint spray pump system.
Electric motor powered hydraulic diaphragm airless paint spray pumps usually use a constant speed AC electrical motor that runs continuously pumping and bypassing hydraulic oil past a diaphragm to pump the paint.. Pneumatic compressed air powered airless spray paint pump use linear travelling motors with regulation that allows for the piston airless spray paint pump travel to be very closely mirrored to the the airless paint spray flow demand at any given time. This reduces airless spray pump component wear and tear and flow pulsations in the airless spray paint fan pattern.
Airless paint sprayers of any design type are a great way of applying most paints to surfaces quickly and efficiently with minimal thinning, if any, of the paint being airless sprayed required. More information about this type of airless spray painting equipment is available at this other popular free information site.
Common Airless Spray Equipment Types
Typical Pneumatic Airless Spray Pump