Compared with other equipment, the muffle furnace has a wide range of applications, that is, weight analysis can also be used for organic matter and coal ash determination. In addition, the muffle furnace can also accelerate the temperature rise and heat evenly. And its daily maintenance also has its own set of methods:
Flanges are a method of connecting pipes, valves, pumps, and other equipment to form a piping system, usually by welding or threading. It is also easy to clean, inspect or modify. Flanges are usually welded or tightened. Flange joints are made by bolting two flanges together and using washers between them to provide a seal.
Pipe assemblies may be bolted together between flanges. Flanges are used to connect pipes to each other, to valves, to fittings, and to special items such as filters and pressure vessels. Cover plates can be connected to create "blind flanges". Flanges are bolted together, and sealing is usually done using washers or other methods. Industries dealing with flammable, volatile, toxic or corrosive substances require special protection at flange joints. Flange shields can provide an additional level of protection to ensure safety.
There are many different flange standards worldwide. For simple functionality and interchangeability, these designs have standardized dimensions. Common world standards include ASA/ASME (USA), PN/DIN (Europe), BS10 (UK/Australia) and JIS/KS (Japan/Korea).
In most cases, standards are interchangeable, as most local standards have been aligned with ISO standards.
Flanges are also made in standardized sizes, usually in "flat", "convex", "mortise" or "ring joint" styles, but other ambiguous styles may be available.
Flange designs include "weld neck", "socket", "lap", "socket weld", "thread" and "blind flange".
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1. When the muffle is used for the first time or after it has been decommissioned for a long period of time, the oven must be performed. The oven time should be room temperature 200 °C for four hours. 200°C to 600°C for four hours. When using, the maximum furnace temperature must not exceed the rated temperature, so as not to burn the heating element. It is forbidden to inject various liquids and easily dissolved metals into the furnace. The muffle furnace is best to operate below the maximum temperature of 50°C. At this time, the furnace wire has a long life.
2. The muffle and controller must work in places where the relative humidity does not exceed 85% and there is no conductive dust, explosive gas or corrosive gas. Where metal materials such as grease are to be heated, a large amount of volatile gases will affect and corrode the surface of the heating element to destroy it and shorten its life. Therefore, heat should be promptly prevented and sealed container or appropriate openings to be eliminated.
3, muffle controller should be limited to use in the ambient temperature range of 0-40 °C.
4, according to technical requirements, regularly check the electric furnace, the controller of the wiring connection is good, whether the pointer pointer stuck movement phenomenon, and use the potentiometer to calibrate the instrument due to magnetic steel, demagnetization, wire, shrapnel The increase in error due to fatigue, balance failure, etc.
5, thermocouple not suddenly pulled out at high temperatures to prevent the coat burst.
6, often keep the furnace clean, timely removal of the furnace oxides and the like.