Tubes:-Quartz - Suitable for up to 1150 degrees Celsius(Vertical up to 1200 Celsius)Has excellent resistance to the thermal market and is impermeable to vacuum gases.At high temperatures is not resistant to chemical attacks.-Alumina - IAP - suitable for up to 1450 degrees Celsius(Vertical up to 1500 Celsius)Has very good resistance in the thermal market. Sealed to vacuum gases. Resistant to chemical attacks except for fluorine, resistant to sulfur and coal atmosphere.-Alumina -Silamentin 60% Al2O3-Suitable for up to 1500 degrees Celsius (vertically up to 1600 degrees Celsius)Good resistance in the thermal market, is not impermeable to vacuum gases, Resistant to chemical attack but will not be opaque in case of leakage. Not suitable for vacuum work.-Aluminous alumina RCA 99/8% Al203 Suitable for up to 1800 degrees Celsius (vertical up to 1900 degrees Celsius)In a vacuum the maximum temperature drops. It depends on the depth of the vacuum, up to 1500 Celsius only. The tube has good resistance in the thermal market, is impermeable to vacuum gases and is resistant to chemical attack except for fluorine.-Inconel- NiCr alloy durable up to 1100 degrees Celsius, under vacuum up to 750 degrees Celsius. Sealed to vacuum gases.SS314 metal - suitable for work up to 1100 degrees Celsius, under vacuum up to 600 degrees Celsius only, sealed, with excellent resistance in the thermal market, does not oxidize.-APM-Advanced Powder Metallurgy FeCral Durable up to 1300 Celsius (vertically up to 1350 Celsius) under vacuum up to 1200 Celsius, Vacuum gasproof, oxidation resistant,
-Flanges in a variety of diameters for tubes with a variety of connections:
-Vacuum pipe connection.- Connection for inert gas inlet. Includes gas clocks and taps for automatic opening and closing of the gases as a function of the process and depending on temperature. (Operated by the control system)-Connection to the inlet to the thermocouple -To check the temperature of the part or perform a temperature uniformity test along the tube.-Connection to hydrogen gas with explosion protection system.Vacuum pump of all kinds.
It is advisable to choose an oven for a maximum temperature which is 100 degrees Celsius above the working temperature of the oven.You can work at the maximum temperature of the oven for short periods of time. A lot of work at the maximum temperature shortens the life of the heating elements.
In a tube furnace, the uniformity of temperature obtained in the center of the oven is good. Temperature uniformity can be improved throughout the length of the oven by adding heating zones at the edges.Important to know - in a tube furnace with one zone the best temperature uniformity (5 + - Celsius) is obtained in the middle third of the furnace, In a furnace of 3 zones uniformity The good temperature of the oven (5 + - Celsius) is obtained in the middle two-thirds of the furnace.-Closing the ends of the tube in insulated corks prevents heat from escaping from the ends and improves uniformity. The larger the thermal mass of the inner tube, the better the temperature uniformity.
The tube furnace comes without an internal tube, the heating elements are placed circularly inside the furnace to heat the tube evenly radially and longitudinally. The same furnace can be used for tubes of different diameters (up to the maximum possible diameter).Tube furnaces are used for work with tubes or with reactors. They come in three forms: balanced, vertical, combined-vertical / balanced. There are furnaces that open to two SPLIT halves that allow convenient insertion and removal of the inner tube or reactor.
A tube furnace needs an internal tube into which the samples, parts, and more are inserted. Proper selection of the material from which the tube is made, diameter, and length will allow for work comfort and good results.
Type of tube-quartz, alumina, metal, depending on what the process requires, vacuum, the atmosphere of gases.Are there any aggressive substances in the process that could damage the tube.When working with a vacuum and flanges are needed, a tube longer than the length of the furnace is needed to connect the flanges at the edges, and the tube must be long enough To allow radiation shields to be inserted into it that will prevent heat from escaping at the edges.
The diameter of the pipe and the heated length depend on the size of the parts inserted into it and the length of heating required.
A tube furnace is ideal for processes that require a vacuum and a gas atmosphere. A variety of sealed tube that are suitable for these processes.Cooled flanges - at high temperatures of 1800 Celsius.Type of vacuum connections (NW16, NW25, NW40).Gas inlet, gas taps and gas clocks with manual or automatic control during process and depending on working temperatures.Thermocouple entry for temperature mapping, for precise control of the process. Vacuum pumps include piping and accessories for a perfect system.
A variety of control systems that allow temperature control over the process, accuracy, and good temperature stability, Good repeatability of temperature.
-Safety controller for over-temperature protection - an independent control circuit that shuts off the oven in the event of temperature rise above a pre-set temperature.
-Temperature programmer that allows the creation of temperature profiles - setting rates of rise and fall of the temperature to the target temperatures
-Computer communication for operating and reading the temperature.
-Smart control system with data logger for temperature recording during the process.
-In 3-zone ovens you can choose between independent control of each zone and primary control with two edge zones
MRC provides Tube Furances customized, according to a specific size, according to customer requirements.Laboratory tube furnaces catalogs:
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