Gas burner is also called as stove burner or gas stove burner. We have produced gas burners for years in China, so always wanted to write an article for burner buyers to learn about all issues related with gas burners.
Gas Burner Application
Gas burners are the fuel gas combustion devices, which make the fuel gas and air separately or mixed into the combustion zone to achieve stable combustion. The fuel gases include acetylene, natural gas or propane. Gas burners are widely used in residential and industrial areas, from ordinary kitchen stoves to hospitals, restaurants, outdoor barbecues, industrial furnaces and boilers etc.
Gas Burner Types
There are hundreds types of gas burners. We just can list some of them, such as portable stove burner, outdoor gas burner, natural gas burner, propane gas burner, burner head, large burner, small burner, star burner, single gas burner, rectangular stove burner, wok gas burner, camping gas burner, double gas burner, fireplace gas burner, portable gas stove burner, lp gas burner, commercial gas burner, butane gas burner etc.
Gas Burner Material
According to our experience, the most of gas burners will use the gray cast iron ASTM A48 Class20 or Class30, but seldom Class35. Why, because the small fire vent holes need machining, if the hardness of material is too high, it will be difficult to drill. You can not compare these holes with other normal holes, drilling on the small buttons will be much more difficult. Moreover, the strength of class20 should already be enough for the application.
If you want to learn the details about these material degrees by other standards, such as Germany, Japan, UK or ISO, please check here material comparison of gray cast iron.
ASTM A48 Class 20 is equal to GG15, HT150, FC150, ISO150.
ASTM A48 Class 30 is equal to GG20, HT200, FC200, ISO200.
ASTM A48 Class 35 is equal to GG25, HT250, FC250, ISO250.
Some buyers may choose the higher degree to get stronger parts, we do not suggest this practice. Higher degree will cause more difficulty for production, and so higher defective rate, and so for higher costs. As for the gas stove burners, the over-high tensile strength is unnecessary.
Gas Burner Casting Process
According to our experience, we suggest two casting processes for producing the gas burners. One is green sand for the shell, and resin sand for the core. We made the core by shell molding process, which means we made the pre-coated resin sand core, then use the normal floor molding with green sand for producing the outside shell. In the way, the inside surfaces are good, and outside surfaces are normal. This process can meet your requirements by the lowest production costs. Of course, the green sand must be very fine, normal coarse sand is unacceptable.
Another process is making both of the shell and core by pre-coated resin sand and shell molding process. In the way, both inside and outside surfaces are good, but just higher production costs. So, the buyers should choose the suitable casting process according to the specific application.
Gas Burner Machining
The only issue about gas burner machining is the machining to the fire vent holes. Sometimes, there are dozens to hundreds of fire vent holes on the gas burners. They need drilling. If you are failed to drill one of them, then this gas burner will be failed, therefore, the drilling is not an easy work as your thought. Dandong Foundry used several small drilling machines to drill them. There are several workers were just in charge of drilling these small holes everyday.
Gas Burner Patterns
As for the casting patterns of gas burners. According to our experience, we suggest to use the iron patterns for making the resin cores, and use the aluminum patterns for making the shells of gas burners. However, for the better outside surface quality, you should consider to use the resin sand for the shells, then you have to use the iron patterns for the shells. All in all, metal patterns are necessary for the gas burners.
Gas Burner Surface Coating
There are several types of surface coating for the gas burners. One is the black heat-resistant painting, another is the normal black painting, which is cheaper than heat-resistant panting, the third type coating is using the anti-rust oil. The heat-resistant painting is the most expensive coating, it is about 0.23 to 0.25 USD/kg. If your gas burner is weight 1kg, then its heat-resistant painting is about 0.23 to 0.25 USD/pcs.
Gas Burner Suppliers
Although many iron foundries can produce gas burners, but not all of them could produce them by low prices and produce them very well. It is mainly because they should use the fine sands and should have the experiences to drilling so many and small holes. Most important of all, they should be very careful during the casting, cleaning and machining processes. Any sloppy operation will cause the failure. Therefore, it is difficult to find a good gas burner supplier.
Gas Burner Prices
The prices of gas burners are mainly related with the unit weight (especially the rough casting weight), the numbers of vent holes, the complexity of structure, and the surface quality of outside surfaces.
Gas Burner Defects
The main defects of gas stove burners are will the sand holes on the surfaces, usually allowable for 2mm diameter and 1mm depth sand holes, and the damage of vent holes, and the dirty surfaces with sand residues. Please notice that normally welding is not permitted since the stove burners should be air proof.
This article was from Dandong Foundry. Please keep this link!
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