A hydrosandblasting machine will bring to a shine parts with small elements and complex shapes

It is difficult to clean pipes from rust and walls from old putty using a metal brush and sandpaper. In this case, scratches from the tool remain on the surface.

There is a lot of dust and small particles flying in the air that are harmful to human health. The hydrosandblasting machine operates without dust and significantly speeds up the cleaning process without damaging the surface being treated.

Low compression in cylinders

On old, worn-out power units, the cause of highly jumping revolutions is low compression. It is not possible to solve this problem in any way. It is necessary to replace the cylinder block or the entire engine, which leads to significant costs.

Compression problems arise for the following reasons:

• unit wear;
• the appearance of scuffing;
• merciless operation of the engine.

https://youtube.com/watch?v=nfg_O5KOhsk

What can you use, besides sand, to make your own sandblasting chamber?

In addition to sand, other types of consumables are suitable for operating the device:

1. Nickel and cooper slag. Some of the most popular options for sandblasting, which are obtained from copper and nickel production waste. The cost is the same as treated sand, but they are stronger and harder.
2. Steel and cast iron shot. Not only the most expensive option, but also the most durable. Used for quick but rough surface treatment.
3. Pomegranate sand. Harder than ordinary sand, but just as fragile. It is expensive and rarely used for work.
4. Glass and stainless steel shot. Sandblasting glass is mainly used for cleaning stainless steel surfaces.
5. Electrocorundum. Solid crystalline form of aluminum oxide. Virtually undamaged and suitable for even the most contaminated surfaces.

Steel and cast iron shot is the most durable abrasive.

If you look at photos of sandblasting, you will notice that the chamber is a rectangular structure. Most often this is a box welded from a metal corner, which is lined with thin steel sheets up to 1 mm thick

To make it easier to control the amount of abrasive during operation, it is best to place a glass or plastic viewing window along the long side.

On the front wall of the chamber there are 2 symmetrical holes with a diameter of 100-120 mm, into which special thick gloves are inserted. It should be borne in mind that they will be constantly exposed to abrasive forces, so replacing these elements should not cause difficulties.

The bottom of the chamber is made of reinforced mesh, under which there is a trench for used abrasive. Comfortable work is ensured by lighting. To do this, just take 2 lamps of the required size. The sandblasting gun is placed inside the chamber, and air is supplied using a hose connected to the outside. Thus, the material will not fly out, which will make it possible to reuse it. In fact, this design option allows you to create a sandblasting gun with an abrasive recycling system.

On a note! If you plan to clean non-standard products of large shape, it is recommended to cover the side edges with a durable tarpaulin. To make the camera as convenient as possible, you should not do the work by eye - it is better to prepare a drawing first. In addition to sand, nickel and cooper slag, garnet sand, glass and stainless steel shot, as well as electrocorundum are used.

Main processing rules

You can get a truly high-quality processing result only by selecting good equipment, consumables and components. The abrasive material must be ideally suited for the specific type of work, otherwise the surface will not be cleaned sufficiently or will be scratched.

Sandblasting discs

The higher the performance of the sandblasting compressor, the faster the cleaning will occur, and the greater the efficiency. It is necessary to select installations with hoses of significant diameter to reduce pressure losses. Couplings and connectors must exactly match the diameters of the hoses

You should also pay attention to the quality of the nozzle - the most durable ones are made from boron carbide, however, they cost much higher than others

What is a sandblasting gun and its purpose?

A sandblasting gun is a nozzle for a compressor, which is designed to clean car body surfaces from stubborn dirt and paintwork. The sandblasting attachment is popular in auto repair shops for painting cars, but nothing prevents a home craftsman from buying a gun for a compressor and using it to clean any metal surface, which is often done before painting, patination and anodizing.

Externally, the nozzle almost completely resembles a gun for blowing or painting a compressor, but there is still a difference. The main structural elements of the device are:

1. Metal body in the form of a pistol
2. Channel - hose for supplying abrasive substance to the gun
3. Nozzle - a hole through which sand flies out under pressure and hits the surface being treated.
4. Handle with trigger - designed to hold the tool body, as well as to start the sandblast feed
5. Adjustment screws for adjusting air pressure and abrasive feed rate

The most important element of the device is the nozzle, which must be made of high-strength materials such as tungsten or ceramics. If you choose sandblasting guns for a compressor with a nozzle made of plastic or thin metal, then such a tool will not last long. The nozzle will very quickly fail under the influence of abrasive substances.

The operating principle of a compressor sandblasting gun is that fine sand flies out of the nozzle under the pressure created by compressed air. This removes paintwork and other contaminants from metal surfaces.

This is interesting!
Sandblasting is intended not only for processing metal surfaces, but also for removing contaminants from plastic, wood and other materials.

How does a sandblasting nozzle work?

The operating principle of any sandblasting installation is that abrasive material from a special hopper enters the nozzle under the influence of an air flow supplied under high pressure. In serial installations, a separate compressor is used to create such pressure, due to which a significant amount of kinetic energy is imparted to the sand stream emerging from the nozzle. In the case of a Karcher washing machine, the pneumatic equipment built into it will be used for these purposes. As a nozzle for such equipment, you can use a serial gun, specially designed for equipping pneumatic treatment plants, but in order not to spend money on such a device, you can easily make it yourself.

In order for your homemade sandblasting nozzle, which you will use for installation on a Karcher device, to be effective and not malfunction, you must use high-quality materials for its manufacture.

Operating principle of wet sandblasting rust cleaning machine

Of course, equipment assembled in this way can, with great stretch, be considered as a full-fledged sandblaster, but it is quite suitable for cleaning various surfaces with a stream of water mixed with sand. When using such a sandblasting device, it is very important to adhere to two recommendations:

• It is better to use distilled water as the working fluid, which will avoid corrosion of the metal elements of the nozzle;
• the sand that will be used as an abrasive must be of a very fine fraction and carefully sifted.

Diagram of a sandblasting nozzle (click to enlarge)

A self-assembled sandblasting machine, the basic elements of which are a Karcher mini-washer and a homemade nozzle, will work according to the following scheme.

• When you press the start button on the nozzle gun, water under high pressure created by the compressor flows past the opening of the intake hose, the other end of which is placed in a hopper with sand. This creates a vacuum in the intake hose.
• Under the influence of vacuum, sand is sucked from the hopper into the main hose, where it is mixed with the water flow.

In order to minimize sand consumption and bring this parameter to a value of 30 kg of abrasive for processing a surface area with a diameter of 70–80 cm, the design of this equipment must be supplemented with taps and dispensers.

Homemade mixer from water taps and tees

Safety precautions when working with sandblasting

There are a large number of risk factors in sandblasting. The most dangerous are abrasive dust and suspended particles of dirt. The most vulnerable places in a person are the eyes and respiratory system. Therefore, it is necessary to prepare for work carefully.

The sandblaster must:

• Wear protective clothing made from abrasion-resistant material.
• Protect your hands with gauntlets.
• Protect your head with a special helmet into which purified air is supplied. There must be an air filter.

Basic safety rules:

1. Minors should not be allowed to work in sandblasting.
2. A person must undergo a training course and be a certified specialist.
3. It is prohibited to consume or be under the influence of alcohol or drugs.
4. All persons involved in servicing the sandblasting machine must familiarize themselves with the safety regulations each time before starting work.
5. Cleaning in cells should only take place under the supervision of persons outside.
6. When working at height, it is necessary to use safety belts.
7. Persons not involved in the process are prohibited from entering the work area.
8. When working near electrical installations or electrical wiring, the power must be turned off.
9. The sandblasting machine must be sealed, have a safety valve and a passport indicating the operating pressure.

If safety precautions are followed and the sandblasting device is used correctly, the unit will last for many years. And if it was purchased for your workshop, then you can even develop a business that will generate considerable income.

How to choose the right sand for sandblasting?

How to choose the right sand for sandblasting?
First of all, it is necessary to take into account the nature of the planned work. What are you going to do: clean an old rusty tank or paint an elegant design on the glass?

Additionally, please note the following:

• What is the strength and thickness of the contamination? Perhaps the abrasive is too fine or not hard enough to cope with this.
• The stronger the surface being processed, the harder the consumable is needed. The softer the base itself, the higher the likelihood of damage from too hard sand. For example, to process steel parts of a car you need steel or cast iron shot. Garnet sand and electrocorundum are used when working with alloy steel, titanium, and so on, when the hardness of quartz and slag is already low. To apply beautiful designs on mirrors and glass, as well as to frost glass, you will need the purest, fine, uniform sand. For working with tempered glass – electrocorundum 0.1-0.8 mm.
• To what condition does the surface need to be brought? The larger the fraction, the rougher the work. For example, to polish a base made of copper or aluminum to a shine, use a small consumable - up to 0.3 mm. If you want to peel off a durable paint coating without damaging the surface, you need a fraction of 0.3-0.6 mm. To remove rust, you need sand or slag of medium size - 0.6-1.6 mm.
• Work completion time. Particles with sharp edges and high hardness (crushed sand, crushed shot, electrocorundum) will level or clean the surface much faster, but rougher than round sand of a similar fraction. Coarse sandblasting abrasives are used to remove welding scale or remove thick bitumen coatings.
• Possibility of collecting the remaining mining. In its absence, it is economically correct to load Cooper, Nickel slag and quartz sand into the gun.

Features and purpose

Sandblasting of metal is a process of cleaning the surfaces of metal structures and other metal products from traces of corrosion, soot, old coatings (for example, varnishes, paints), scale after welding or cutting, foreign deposits by exposing them to a mixture of air with particles of abrasive materials supplied through high pressure nozzle to the metalworking site. As a result of this, separation or complete erasing of all excess from the surface of the metal product being cleaned occurs.

However, it is worth noting that, unfortunately, sandblasting cannot remove fatty deposits, since they penetrate too deeply into the metal. After the surface cleaning process with a sandblaster, oil stains should be treated with appropriate solvents that will degrease such areas before subsequent coating.

The scope of application of sandblasting equipment is quite wide:

• factory processing of metal products and structures before applying paint and varnish coatings to finished products;
• during repair work on the main equipment of thermal power plants (for cleaning tubes of condenser and boiler units, the inner surface of all kinds of vessels and pipelines, turbine blades);
• in metallurgical production;
• at aircraft factories in the manufacture of aluminum parts;
• in shipbuilding;
• in the production of mirrors and glass with complex textures;
• in construction;
• at car service stations and in workshops where bodywork and straightening work is carried out;
• in engraving workshops;
• in the manufacture of metal-ceramic prostheses;
• at electroplating enterprises;
• After sandblasting, defect detection of metal structures is possible, the operation of which must be carried out in accordance with GOST standards.

At home, such equipment is still used infrequently - mainly by owners of private houses and large garden plots with outbuildings. It may be necessary when cleaning existing metal surfaces before painting or applying protective agents.

Where is the device used?

The areas of application of the sandblasting method are quite extensive. These devices are mainly used to clean the internal and external sides of products from corrosion, paint, scale, various types of contaminants, remove burrs, and polish metal. Also, these devices are often used for:

• Cleaning and removing greasy marks from surfaces before painting various products: boats, car rims, car bodies, rusty cranes, pipes, rusty doors.
• Construction. For finishing under plaster, walls made of stone, brick or concrete are sandblasted. This type of finishing is also needed before painting walls in wooden houses.
• Artistic works. Marble slabs and monuments are processed, glass and shop windows are frosted.
• Industrial facilities. The surface is prepared for painting during repair work at energy, ship repair, railway and other facilities.

This cleaning method is often used during body repairs, as well as before painting car wheels.

How does a sandblasting machine work?

Having taken up the manufacture of a sandblasting machine, you must carefully study the principle of its operation, prepare all the necessary tools and elements of its design. A homemade sandblaster, if assembled correctly, is practically in no way inferior to serial equipment in its capabilities. At the same time, it is possible to manufacture a device that allows you to effectively carry out work on cleaning surfaces made of various materials with minimal financial costs.

Sandblasting machine diagram

A homemade sandblasting machine, like a serial one, works on a principle somewhat reminiscent of the operating principle of a conventional device for spraying paints and varnishes - a spray gun. Meanwhile, there are still differences in the operation of such devices, which does not make it possible to replace them with each other.

The main element of any device for sandblasting is a compressor, which is necessary in order to create an air flow with the required pressure in the installation lines. Passing through the main hose past the hose for collecting abrasive material, the air flow creates a vacuum, which causes the abrasive to begin to be sucked into the main line and mixed with the air stream. The already formed flow of working material, consisting of air and abrasive, enters the nozzle, through the hole of which it is supplied under high pressure to the surface being treated.

The air inlet is made near the place where the condensate is drained, so that the flow loses most of the moisture, hitting the wall of the receiver

In addition to the compressor, the most important element of a sandblasting installation, which largely affects the efficiency of its operation, is the nozzle, which ensures the formation of an abrasive jet with the required characteristics. At home, you can only make a ceramic nozzle by using old spark plugs from which the metal electrode is removed. Serial nozzles, characterized by increased wear resistance, are made of steel coated with boron carbide or tungsten carbide, less often - of ordinary steel, cast iron and ceramics (such products quickly lose their characteristics under constant exposure to abrasive material).

Homemade metal nozzles turned on a lathe do not last long, but they cost practically nothing

Description and design features of hydrosandblasting devices

The design of the hydrosandblasting apparatus uses the injector principle. Water is supplied under high pressure through a hose. Sand is dosed into it, which it releases out through a nozzle. The jet is directed onto the surface to be treated. The sand, guided by the water, hits, dislodging whatever is there from the surface.

The main components that ensure the operation of sandblasting:

• high pressure water pump;
• reinforced hose;
• nozzle – sprayer;
• container with sand;
• shut-off valves.

At the bottom of the container with sand there is a hole with a outlet into a hose with water. To regulate the amount of abrasive supplied, a damper and a shut-off cone are installed, which prevents water from entering the sand tank. On the top of the neck there is a sieve for sifting sand and a one-way air supply valve.

The pump pumps water, and it rushes through the hose to the sprayer. Along the way it picks up sand, which flows from above to the container. The nozzle directs the entire jet onto the surface to be treated. In industrial installations, compressed air can be supplied to the sand tank. It replenishes the pressure inside the tank and prevents sand from caking and ensures its uniform flow into the hose.

Stationary installations in the form of chambers have drain holes at the bottom. Through them, waste water and sand are collected in tanks. Once cleaned, the materials can be reused.

Important!

The sieve additionally cleans the abrasive from mechanical impurities. The water filter should be installed before the pump.

Areas of application

Today, there are a large number of areas where sandblasting guns can be used. Thus, surface treatment with sand is relevant in the following cases:

• removing rust and paint residues before applying various protective coatings to the surface (for example, anti-corrosion compounds);
• grinding parts and products made of wood, stone, plastic, ceramics, metal and other materials (this is necessary in order to subsequently apply further coating to a particular surface);
• applying inscriptions and drawings on various types of surfaces;
• frosting of glass (for applying patterns to it, the procedure is also used for the production of tableware);
• restoration of various objects;
• degreasing products before covering them with varnish or paint;
• processing walls to give them a special roughness;
• creating the so-called “aging” effect (relevant in the process of processing furniture and decorative interior items: for example, boxes or frames);
• polishing of automobile parts.

Overview of species

In general, there are 3 types of abrasive cleaning of metal surfaces, which have certain rating boundaries between each other: light, medium and deep. Let's look at a brief description of each type.

Easy

An easy type of metal cleaning includes the removal of visible dirt, rust, as well as peeling old paint and scale. Upon inspection, the surface appears fairly clean. There should be no contamination. Traces of rust may be present. For this type of cleaning, sand or plastic shot is mainly used at a mixture pressure of no more than 4 kgf/cm2. Processing is carried out in one pass. This method is comparable to manual cleaning with a wire brush.

Average

With medium cleaning, a more thorough treatment of the metal surface is achieved by increasing the pressure of the air-abrasive mixture (up to 8 kgf/cm2). An average type of treatment can be considered such if only about 10% of the total area remains on the metal surface after passing through the sandblasting nozzle. There may be some minor scale present.

Deep

After deep cleaning, there should be no dirt, scale, or traces of rust left. In fact, the metal surface should become perfectly clean and smooth, almost white clean. Here the pressure of the mixture of air and abrasive material reaches 12 kgf/cm2. The consumption of quartz sand with this method increases significantly.

Based on the use of working material in the mixture, two main types of cleaning are distinguished:

• air-abrasive;
• hydrosandblasting.

The first uses compressed air mixed with various abrasive materials (not just sand). In the second, the working component is water under pressure, into which sand particles (most often), glass beads and finely chopped plastic are mixed.

Hydrosandblasting has a softer effect and more thorough surface cleaning. Often, even oil stains can be washed out using this method.

Advantages of hydrosandblasting

Sandblasting replaces the labor-intensive process of removing dirt and coating residues and removing scale. Hydrosandblasting has advantages over the traditional method of surface treatment using compressed air:

• absence of dust harmful to humans;
• the surface is obtained with a slight roughness, which increases adhesion;
• gentle processing;
• abrasive consumption is reduced;
• cleaning stone, masonry, soft metals;
• cleaning intensity is adjusted;
• the remains of caustic soda and other cleaning materials are washed away;
• work in hard-to-reach places.

With water, sand removes dirt, rust, and old decorative coatings from metal, ceramic and stone surfaces. Grains of sand dislodge dirt, creating a matte surface. Primer and paint adhere well to it. Polishing is done quickly, with minimal effort. The macrostructure of the alloys is examined on samples treated with hydrosandblasting, and etching begins without lengthy grinding.

Sand particles moistened with water are heavier than dry ones. They hit the surface with great force, performing active cleaning. As a result, the consumption of abrasive material is reduced by up to 4 times.

During processing, water dissolves and washes away the remaining detergents remaining in microcracks after the previous washing of parts. Acoustic soda has a particularly harmful effect on metals and stone. When dry sandblasting, it gets deeper into the cracks and gradually destroys the material.

Disadvantages include splashing water and puddles on the floor. Hygroscopic materials cannot be processed.

Important!

Water pressure is adjustable 2-7 kg/cm2. You must wear a special suit and follow safety precautions to avoid serious injury.

Overview of species

Sandblasting glass can be done in different ways:

• matte image on a transparent background (painting only the sketch);
• matte background with a transparent pattern (processing of most of the glass);
• bronze sandblasting (using dark tinted material of a brownish tint);
• matting of different densities (processing elements under different pressures);
• “floating” effect of the pattern on the mirror;
• sandblasting treatment on the inside of glass;
• volumetric artistic cutting (deep application of a 3D pattern using the technique of alternately spraying several layers of a pattern onto a matte surface).

Matting is the simplest technique that allows you to achieve flat designs with clearly defined boundaries. If the matting is multi-layered, it is called artistic. In this case, the transitions of textures, tones and colors are more pronounced. Such images are clearer and more naturalistic.

Artistic step-by-step matting takes more time; it is used when processing glass of different thicknesses (from 6 mm). During its implementation, not only film, but also metal templates are used. At the same time, metal templates are distinguished by the simplicity of their ornamentation. Film analogues are used to create complex patterns.

Color tinting allows you to obtain any shade of the glass surface. It is distinguished by the application of sandblasting to the inside of the glass. The facial remains smooth and even, which simplifies care. In order to increase service life, a protective film is applied to the inside. Amalgam involves applying a pattern to the inside of the glass.

Colored glass processing using sandblasting technology involves creating a colored pattern (for example, stained glass, diamonds) or a pattern that glows in the dark. The sandblasting technique is used in the production of compositions with a velvet texture. Cutting or engraving is used to create a detailed drawing.

Sandblasting technology allows you to apply a winter ornament pattern. In this case, the technology of creating an icy pattern (frost effect) is used. For this purpose, a homogeneous mixture is used in the work.

Purpose of the device

Sandblasting machine
The purpose of the sandblasting machine is abrasive processing of materials. Let's look at all the use cases in detail:

• Metal processing. In production, often during the delivery of metal, the latter becomes covered with rust. This is acceptable for raw materials, but not for the finished product. A sandblasting machine effectively removes any dirt and rust of any depth from the metal surface. After processing, the paint adheres well to the item.
• Glass processing. A matte layer of roughness is applied to the glass with sand, which makes it opaque. You can also use a sandblasting machine to apply various types of designs.
• Household use. Among other things, low-power sandblasters are often used to clean dishes.
• Stone processing. Before painting, the previous layer must be removed from the surface. Thanks to a sandblasting machine, this can be done quickly, immediately preparing the surface for future painting.

Suit for working with a sandblasting machine
It is necessary to pay special attention to the fact that during processing, sand removes the upper part of the material, and does so in fragments, leaving the surface rough. Paint adheres well to such micro-irregularities

Therefore, sandblasting combines removing the previous layer of paint and preparing the surface for a new treatment.

Review of popular models, how to choose?

Models suitable for garage conditions: the Forsage F-90SFSB model, with its help, removes old paint, and is suitable for preparing metal parts for primer. The Big Red TR4012 model is used for repairing car bodies and metal structures, for cleaning brick and concrete walls. Model Sorokin 10.2 removes layers of paint, scale and rust from surfaces.

Suitable for matting metal elements under primer. Devices for the professional workshop: the Itrek DSMG-160 model is suitable for harsh cleaning of external and internal surfaces consisting of concrete, metal and wood. The Contractor DBS 200 RC model is needed for cleaning various surfaces of concrete, metal, structures, and structures.

Sandblasting Equipment

Sandblasting of metal is carried out using special devices, which consist of several parts:

1. A compressor is an element of a sandblasting machine that pumps up operating pressure. The stronger the material being processed, the more powerful the compressor is needed.
2. Container for mixing abrasive with air. It has an inlet (for air) and an outlet (for discharging the finished mixture).
3. Nozzle - through it the suspension is supplied to the working surface. It is better to perform metal processing using tungsten and ceramic elements.

There are several types of installations for cleaning materials from corrosion. These can be stationary and portable models. The first include sandblasting chambers. These are closed structures that allow you to clean parts of a certain size by reusing the abrasive. However, the main disadvantages of the cameras include the limitation on the size of the workpieces processed.

Sandblasting nozzle

How to choose a water machine?

When choosing a model of a hydrosandblasting machine, you should decide on the dimensions of the parts to be processed and the type of equipment:

• stationary camera;
• mobile installation.

To clean parts before coating them with paint and other materials, cleaning from scale and dirt is carried out in chambers. Their dimensions are determined by the dimensions of the workpieces.

Builders need mobile units with water tanks to clean facades and pipelines. Large metal structures are processed similarly. The power and size of the nozzle cone determines how much area can be processed per unit of time.

Kinds

Today there are several types of sandblasting guns. For example, you can find an electric air gun, a portable device and many other models in the market.

According to the method of releasing the mixture

According to the method of ejecting the abrasive mixture, guns can be point-based (that is, sand is directed from the nozzle in a straight line to a specific point), or they can have a wide range of action. Often the first versions of devices are considered more effective.

According to the abrasive supply option

Depending on the supply of abrasive material, devices can be:

with a tank (such a gun is similar in characteristics to a spray gun);

How much does sandblasting cost?

According to data for 2022, the device of the Sorokin 10.1 model in the store costs 9999 rubles with a 19 liter tank. The AE&T T06505 device for 19 liters costs 8829 rubles. Mobile pressure device: Forsage F-SB5 with a tank volume of 19 liters costs 11,946 rubles. The device with collection and tank for 106 liters AE&T T06528 has a price of 24,905 rubles. On various sites there are devices costing from 500 to 89,900 rubles.

The price depends on the volume of the abrasive tank, power and type of model. The variety of blasting devices indicates the narrow specialization of the equipment. Therefore, decide on the goals and conditions of the work: taking into account the identified features, consider the capabilities of the available models, and the choice will become obvious.

Recommendations for selection

The choice of material for a sandblasting machine will be influenced by the type of surface, its condition and other characteristics:

1. Thickness of the coating layer that is planned to be removed, surface strength. Low-hardness abrasives are not suitable for durable elements, since their processing will not give the desired results;
2. For harder objects, the hardest abrasive should be selected, and for soft elements, a less hard one;
3. To get a minimum number of dents and chips, it is better to use fine abrasives;
4. Hard machining raw materials with sharp edges will be able to complete the process at a higher speed than round-shaped abrasives;
5. If you plan to treat the surface once, then you can choose an inexpensive option in the form of quartz sand or cooper slag.

Granulated plastic, glass beads, and glass beads are also used as abrasive materials. Any type of abrasive for a sandblasting machine has its own properties, so all that remains is to make the right choice, taking into account the work being carried out.

Abrasive test sandblasting electrocorundum VS sand

How does he work?

First, a little about how the device works. By design, sandblasting is made of the following components:

• storage receiver;
• air compressor;
• container with abrasive elements;
• spray gun;
• automation and control devices;
• connecting hoses.

Most often, the power and productivity of the device does not depend on the compressor, but on the size of the internal resistance, the maximum pressure and the length of the operating hoses. The principle of operation of the unit depends on the type of sandblasting and may differ slightly, but at the heart of their work is: a compressor that creates air pressure that is pumped into the receiver chamber.

After the appropriate pressure appears, the air flow is supplied to the gun, and soon a vacuum is created, which draws in the abrasive particles and delivers them at high speed to the workpiece.

Which one is better to choose?

Thinking about why you need it, as well as the required power and amount of work will help you decide on the choice of product. Injection-type devices are purchased for work on removing old paint before painting cars, for frosting glass, to quickly age wood. This device has a low capacity and does not require a powerful compressor. When choosing pressure devices, take into account the areas of application of the device; models with a capacity of 200 l are suitable for stationary installation, and models with a capacity of 100 l are suitable for mobile installation.