Working Principle and Classification of Vacuum Pump in Vacuum Drying Oven
1, The working pressure of the vacuum pump should meet the limit vacuum and working pressure requirements of the vacuum equipment, and the best value of the vacuum degree of the selected vacuum pump is 133pa=-0.1 mpa. Usually, the vacuum degree of the selected pump is half to an order of magnitude higher than the vacuum degree of the vacuum equipment.
2, Correctly select the working point of the vacuum pump. Each pump has a certain operating pressure range.
3, The vacuum pump under its working pressure, should be able to discharge all the gas generated in the process of vacuum equipment.
4, Correctly combine the vacuum pump. Because the vacuum pump has selective pumping, sometimes a pump can not meet the pumping requirements, and several pumps need to be combined to complement each other to meet the pumping requirements, such as titanium sublimation pump has a high pumping speed for hydrogen, but can not pump helium, and the three-pole sputtering ion pump, (or bipolar asymmetric cathode sputtering ion pump) has a certain pumping speed for argon, the combination of the two, It will make the vacuum device get a better vacuum degree. In addition, some vacuum pumps can not work at atmospheric pressure, need pre-vacuum; Some vacuum pump outlet pressure is lower than atmospheric pressure, the need for the front pump, so it is necessary to combine the pump to use.
5, Vacuum equipment for oil pollution requirements. If the equipment is strictly required to be oil-free, a variety of non-oil pumps should be selected, such as: water ring pumps, molecular sieve adsorption pumps, sputtering ion pumps, cryogenic pumps, etc. If the requirements are not strict, you can choose to have a oil pump, plus some anti-oil pollution measures, such as cooling trap, baffle, oil trap, etc., can also meet the clean vacuum requirements, our company's vacuum drying oven selection is rotary vane oil pump, its main characteristics: large force, fast speed, high efficiency.
6, Understand the composition of the gas being pumped, whether the gas contains condensable steam, whether there is particulate dust, whether there is corrosion, etc. When selecting a vacuum pump, you need to know the gas composition, select the appropriate pump for the gas being pumped. If the gas contains steam, particles, and corrosive gases, it should be considered to install auxiliary equipment on the pump inlet line, such as condenser, dust collector, or liquid water filter.
7, What is the impact of the oil steam discharged from the vacuum pump on the environment? If the environment is not allowed to have pollution, you can choose an oil-free vacuum pump, or exhaust the oil steam to the outside.
8, Whether the vibration generated by the vacuum pump during operation has an impact on the process and the environment. If the process does not allow, should choose non-vibration pump or take anti-vibration measures.
9, The price of vacuum pump, operation and maintenance costs.
Introduction of Dust-free Oven
Dust-free oven, also called clean oven, is a special drying equipment that provides a high-temperature purification environment. The air inside the oven is closed and self-circulating, equipped with an enhanced air motor for forced air circulation exchange, and repeatedly filtered by a high-temperature and high-efficiency air purification filter, so that the drying oven studio is in a dust-free and clean state. The internal wall of dust-free oven studio is made of mirror stainless steel, and the external shell is made of stainless steel or cold-rolled steel plate. The temperature in the working room is automatically controlled by intelligent LED digital temperature controller, with PID regulating function, digital display time control function, and overtemperature alarm device, which is easy to operate and safe to use. These series of dust-free oven are suitable for drying electronic, pharmaceutical, optical, chemical and other enterprises and scientific research departments with clean requirements (the oven can be installed nitrogen port if there are special requirements).
Features of high-efficiency air filter dust-free oven:
1. Full week argon welding, high temperature resistant silica gel breaking, SUS304 # stainless steel electric heating manufacturer, micro dust produced by the guard machine itself;
2. High temperature resistance, under the premise that the clean level of the working site reaches class 1000, the laboratory can effectively filter the micro dust and reach the clean level of class 100;
3. Vertical type, reduce the site occupation area, with high efficiency.
Application of dust-free oven：
The dust-free oven is suitable for pre-treatment baking of silicon wafer, gallium arsenide, lithium niobate, glass and other materials before gluing, hard film baking after gluing and high temperature baking after developing in semiconductor manufacturing. It is also suitable for electronic liquid crystal display, LCD, CMOS, IS, medicine, laboratory and other production and scientific research departments; In addition, the dust-free industrial oven can be used for drying, heat treatment, aging and other high temperature tests of non-volatile and non-flammable and explosive items.
Clean Dust-free Oven
Clean oven is also known as dust-free oven, mainly using the air filter to purify the environment and avoid fine particles in the air into the chamber. The air inside the chamber is closed and self-circulating, which is repeatedly filtered by the 100-class high temperature and high efficiency air filter, so that the working room is in a dust-free state. The dust-free oven is suitable for pre-treatment baking of silicon wafer, gallium arsenide, lithium niobate, glass and other materials before gluing, hard film baking after gluing and high temperature baking after developing in semiconductor manufacturing. It is also suitable for electronic liquid crystal display, LCD, CMOS, IS, medicine, laboratory and other production and scientific research departments; In addition, the dust-free industrial oven can be used for drying, heat treatment, aging and other high temperature tests of non-volatile and non-flammable and explosive items.
Features of dust-free oven:
1. Structure: the structure of dust-free oven is reasonable, assembled by the box part, the electrical control cabinet, the electric heating and the air duct circulation system.
2, Sealing design: surrounded by argon welding, using high temperature silicone rubber dust-free sealing strip heat insulation, to ensure tightness and cleanliness;
3, External dust treatment: the external material is SPCC steel plate after powder spraying plastic, wear-resistant dust and slag;
4, High efficiency filter: HEPA filter structure clean room, 99.99% effective filtration, cleanliness reached grade 100;
5, Energy saving: insulation material for high-density fiber, heat preservation and energy saving;
6, Layered structure design: the height of the internal chamber layer can be adjusted and freely taken out;
7, Temperature control instrument: automatic control of temperature, constant temperature and time control, setting with over temperature automatic power outage and alarm circuit for reliable control and safe use.
8, Electrical accessories: all use the first-line brand, PID calculus temperature control system and overtemperature protection device, intelligent constant temperature, small temperature difference, suitable for different products of long and short baking.
Product parameters of dust-free oven:
1, Temperature range: from normal temperature to 250℃, constant temperature adjustable
2, External size: H1660*W770*D920mm; internal size: H900*W600*D600mm
3, Heating speed: from room temperature to 200℃ in about 30 minutes
4, Insulation performance: the outer wall temperature of the chamber does not exceed 45℃ (when the temperature inside the chamber reaches 200℃)
5, Temperature control accuracy: ±1℃
6, Temperature uniformity: ±3℃%
7, The use of power supply: 380V/50HZ (3 ∮ 5 wire)
Vacuum Drying Oven of Lab Companion
Small vacuum drying oven designed for various uses of vacuum drying.
● Through the auxiliary menu key, you can realize the operation of overrise prevention device, deviation correction, key lock setting.
● It has self-diagnosis loop (temperature sensing abnormal, heater line break, automatic over-rise prevention, SSR short circuit), over-rise prevention, leakage protection switch to prevent over-current, key lock and other safety functions.
● For safety, a protective panel made of resin is installed on the observation window.
Specification of vacuum drying ovens:
Model number
OVEN-V10
OVEN-V27
Method
Pressure reduction and wall heating
Temperature range of use
40～200℃
Pressure range of use
101～0.1kPa（760～1Torr）
The time it takes to reach the maximum temperature
About 60 minutes
About 90 minutes
Accuracy of temperature regulation
±1.5℃（at 240℃）
Heating method
Direct heating of pressure tank wall
Heater power
0.68KW
1.05KW
Timer
1 minute to 99 hours 59 minutes and 100 to 999 hours 50 minutes (with timing wait function)
Safety device
Self-diagnosis loop (abnormal temperature sensing, heater break, automatic over-rise prevention, SSR short circuit), over-rise prevention, over-current leakage protection switch, key lock function
Internal size(W*D*Hmm)
200×250×200
300×300×300
External size(W*D*Hmm)
400×410×672
510×460×774
Internal volume
10L
27L
Number of shelf layers/layer spacing
3 layers (fixed) /63mm
4 layers (fixed) /71mm
Weight
About 43kg
About 69kg
Accessory
Stainless steel sheet, 2 pieces
Optional
Shelf, vacuum pump, N2 import device, recorder, combined warning light (standby/running/failure), external communication function (RS485), temperature output terminal (4 ~ 20mA), external alarm output terminal, time arrival output terminal
Get A Quote
IPv6 network supported