How does it work?
Manual spray gun works with liquids based on paint, chalk and water. It is used for processing a small area of the surface. The tool is very simple in its construction and reliable in use. The spray gun unit includes:
- Base with suction and discharge valves;
- Pressure hose;
- Fishing Rod;
- Sleeve with filter for suction;
- Lid and pump.
The cylindrical body has a built-in pump, which is based on a piston system. The system consists of a rod, a cylinder, a cuff and a handle for the drive. O-rings are used to ensure the tightness between the housing components and the pump cover. The fishing rod consists of two parts, which makes it possible to change its length. The atomizer can rotate, allowing you to change the flare of the torch to the axle rod.
For reliable operation, the tool design should correspond to such items:
- To be light, the center of gravity should be placed so that the painter at work is minimally tired;
- The spray head must be multi-dimensional, with different nozzle orifice diameters;
- The main parts of the spray gun must have anti-corrosion properties and high resistance to wear.
Note! For large volumes of work, the manual spray gun is not suitable.
Preparation is the key to the success of the
The piston-type manual spray gun operates on the principle of sucking the spray liquid out of the container, when the suction hose with the filter is lowered into it, while the rod handle is operating. With the reverse movement of the rod, the valve closes and pumps the paint material into the cylinder. The pressure rises and the liquid moves to the rod. With the help of the trigger, it reaches the sprayer, which is used for spraying.
In order for the manual spray gun to work correctly, it is necessary to follow certain rules. At the beginning of the work, the instrument is partially filled with paint. Next, the filter is removed and 7-10 double stem approaches are made so that the apparatus is filled with air. If the liquid begins to leave the atomizer with a fine stream, it means it works normally.
The stem must be raised smoothly to avoid splashing. During operation, excessive pressure on the cylinder should be avoided. If the pressure in the cylinder decreases, then it must be raised, otherwise the paint layer will be too thick. Important! Upon completion of work, the spray gun must be disassembled and all elements cleaned.
Proper maintenance of the spray gun
In order for the manual spray gun to have a long service life, it is necessary to carry out constant maintenance to identify possible malfunctions. These include both periodic and annual checks. The routine checks are flushing and inspection of the apparatus after its use, and periodic checks are made every six months to check for malfunction. The algorithm is as follows:
- Visual inspection of the instrument for possible breakdowns;
- Troubleshoot all problems found during the scan;
- Checking the gaskets and, if necessary, replacing them;
- Checking the quality of the device.
The surface must be cleaned from grease and dirt before painting. It is sanded with abrasive material, all dents and scratches are primed. A new layer of paint is applied only after the previous one has dried.
Note! Before starting the process, the manual spray gun must be checked for operation and, if necessary, adjusted.