3 Important Nuances to Consider When Choosing a Gas Filter for a Boiler
A gas filter is a small device that is installed into the gas pipeline for collecting dust and debris and preventing foreign particles from entering the boiler system.
The designs differ in their structure, operating principle, material, and body features. The boiler filter is significantly increases service life unit, prevents blockages, increases safety and reliability.
Gas filters for heating boiler
If you want to increase the service life of your heating equipment, its reliability and safety, then add it to your system need to install gas filter.
The device is installed into a horizontal section of the pipe in front of the shut-off and control valve or measuring equipment of gas supply systems.
In addition to all this, counters show the data received without errors. Nodes boiler protected from corrosion.
Reference. The air or gas passing through the boiler structure contains a lot of sand, metal scale, dust particles, resinous substances, mechanical impurities and other solid pieces of debris. Filter will prevent clogging of the system these elements and will increase the tightness shut-off valves.
Varieties
It is important to approach the choice of filter responsibly, because it will depend on him service life and reliability level gas supply system. There are different filtration units on the construction market. They differ in several ways.
By design
Gas filters can be angular or linear. The first ones are also called oblique or Y-shaped due to the branch of the filter part. Inside is the main element that cleans the air or gas. Usually devices installed horizontally, with the branch facing downwards. The plug is located on the side at an angle. It is needed to clean the filter.
Linear modifications are called straight. Their main difference is that the filter element is not at an angle, but verticallyThe plug is located at the bottom.
By the method of manufacturing the case
- welded (steel);
- cast (aluminum or cast iron).
Housings made of aluminum or cast iron alloys are produced by casting. The higher supposed the pressure, the thicker manufactured wall constructions.
The minimum wall thickness is determined by the casting properties of the material and the thickness of adjacent elements.
Welding is often used to make the filter housing. No special models or molds are required for its production. Walls in welded buildings thinner than in foundries.
By filter material
When producing and selecting a filter, special attention is paid to the filter material. It must have the property inertia in relation to gas, to clean to the extent necessary and be minimally exposed to external factors during operation and during periodic cleaning of the filter system.
There are commercially available filters hairy And mesh. The first ones use special cassettes filled with nylon thread or horsehair and additionally impregnated with viscose oil.
IN mesh the same devices are used woven metal mesh, the devices are single-layer and double-layer. Mesh filters are thin, but they clean air or gas more effectively. During use and clogging filtering sensitivity increases, A bandwidth, vice versa, decreases.
Photo 1. Disassembled mesh filter: you can see the metal mesh, which is used to clean the water or gas passing through it.
Hairy devices work on a different principle. Filter material particles are destroyed or carried away by streams gas or air. This leads to a decrease in the basic functionality and deterioration of the filter's efficiency.
To minimize the loss of filter material, but maintain a high degree of gas purification, it is necessary to observe special pressure drop standards for filter screens or cassettes.
Important! In mesh filters maximum permissible the pressure difference is 5000 PaIn hair it is equal 10000 Pa. Before use or immediately after cleaning and washing the filter, the difference should not exceed the limits 2000—2500 Pa for mesh devices and 4000-5000 Pa for hair.
Mesh device type FS
It acts as a filter material metal, single-layer meshDuring factory production it is given cylindrical shape. Then they are soldered to the frame, which is located inside the cylinder itself. Thanks to the fine-mesh net, solid particles and debris are retained on it and fall down. After this procedure, the purified gas moves through the outlet and enters the boiler.
Hair device type FG
The body contains cassette.
In its cavity are located fibers, consisting of pressed horsehair or nylon thread. These fibers impregnated with viscin oil.
The packing of materials must be completely uniform without gaps, lumps, bumps and strands. Gas is purified through it.
Cleaning the filter before use
To clean the gas filter, you need to:
- remove the lid;
- from flange remove the plug;
- remove the cassette and shake it out accumulated dirt;
- you can have a cassette wash in xylene, benzene or any other solvents.
Important! There are special mechanisms in the design of filter systems - nipples. They are needed to connect devices that will help determine the magnitude of pressure drops on the filter element.
The body can be made of steel by welding.
Useful video
A video demonstrating a gas filter for a boiler and describing its installation.
Responsible approach to selection
When choosing a filter system, it is important to pay attention to the method of manufacturing the housing. Cast This option will withstand high pressure drops, but will cost more. Welded The model will cost less, but its durability is lower.
It is also important to pay attention to the filter material: hairy the models can withstand significant loads, mesh easy to clean.
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