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Vacuum atmosphere electric furnace series
Set research and development, production, sales, service as one of the formal electric furnace manufacturing base

Lyl-szkl vacuum atmosphere furnace

Brief introduction

Lyl-szkl vacuum atmosphere furnace Energy saving, environmental protection and new type electric furnace with advanced technology and independent research and production has advanced and reasonable structure and beautiful appearance. The shell is made of high-quality cold-rolled steel plate, processed by CNC machine tool and processed by luxury and beautiful double-color imported epoxy powder electrostatic spraying process. It is high-temperature resistant and corrosion-resistant. It adopts high-quality resistance wire / silicon carbon rod / silicon molybdenum rod as heating element and double-layer air insulation layer of furnace shell, which can maintain low surface temperature of furnace shell. The furnace has balanced temperature field, low surface temperature of furnace body and heating rate It has the advantages of adjustable energy saving rate. The furnace is made of ceramic fiber material by numerical control technology. It has strong thermal shock resistance, strong cold and heat resistance, good corrosion resistance, no collapse, no crystallization, no slag, no pollution and long service life. The control system adopts microcomputer artificial intelligence regulation technology, with PID Adjustment, full-automatic control, self-tuning function, multi-stage programming, and various heating and insulation programs can be programmed, with high temperature control accuracy; integrated module silicon controlled rectifier control, phase-shifting trigger, protection system: independent over temperature protection, overpressure, over current, leakage, short-circuit protection. The degree of automation is high, and the indexes have reached the advanced level.

The equipment has beautiful appearance, reasonable structure and simple and convenient operation.

Product features( Product Features

   housing It adopts high-quality cold-rolled steel plate with double-layer structure, and the shell color paint is baked at high temperature, which is durable.

     Air insulation The furnace has the advantages of balanced temperature field, low surface temperature and fast temperature rising rate.

   vacuum system Special design, easy to operate, high vacuum degree and small vacuum leakage 10-5pa )。

  Sealing system Adopt stainless steel flange and furnace tube and high temperature resistance O The valve control is equipped with inlet valve, exhaust valve and vacuum valve, which can be filled with inert gases such as nitrogen and argon.

   chamber of a stove or furnace The imported composite alumina fiber material is constructed by special process, which can save energy than traditional electric furnace 60%

  Control system It adopts microcomputer artificial intelligence regulation technology, has multi-stage programming, and can program various heating, constant temperature and cooling programs, with high temperature control accuracy. It is controlled by silicon controlled rectifier (SCR) and triggered by phase shifting

   control panel Digital control has (over temperature, over pressure, over current, broken couple, power-off and other protection functions)

Temperature category: one thousand    1200    1400   1600   1700   1800


This series of equipment is suitable for scientific research institutions, colleges and universities, industrial and mining enterprises ideal experimental and production equipment. It is mainly used for high temperature precision annealing, microcrystallization, ceramic glaze preparation, mold annealing, powder metallurgy, plastic powder foam experiment, nano material sintering, metal parts quenching and all heat treatment required by high temperature process.  

Qualification & Honor

Quality management system certification GB/T19001:2016 / ISO 9001:2015   european union CE Certification: "Luoyang civilized and honest management demonstration enterprise" Electric furnace industry leader in China Quality, service, reputation AAA enterprise Products can withstand the inspection of professional testing institutions, and a third-party identification certificate can be issued if necessary.

Main functions & Features

one Energy saving, power saving, environmental protection and pollution-free (furnace material high-purity composite alumina / Ceramic polycrystalline fiber, light weight, less heat storage, energy saving, half power operation on average)

two Easy to replace   Energy saving and time saving (high quality resistance wire / silicon carbon rod / silicon molybdenum rod, long service life and convenient replacement)

three It is convenient to design, convenient to use and easy to operate

four High temperature control accuracy (high quality instrument, temperature control accuracy ± one The third party test certificate can be issued for the instrument

five Good uniformity of furnace temperature (reasonable layout, balanced temperature field, no dead corner in furnace chamber)

six The temperature is controlled by microcomputer program, the heating rate is adjustable, and the automatic operation does not need manual supervision

seven Over temperature, over pressure, over current, leakage, broken couple, broken rod automatic protection alarm

eight The furnace door can be opened and closed to facilitate the removal and discharge of furnace tubes

nine   Wide range of applications: universities, scientific research institutes, industrial and mining enterprises, etc. do powder, military, electronics, metallurgy, medicine, ceramics, glass, machinery, new material development, special materials, refractory materials, building materials, chemical industry, metal sintering and metal heat treatment, etc

ten Double shell, air convection insulation

eleven The shell is sprayed with plastic, and the appearance is exquisite and generous

twelve Good reputation and numerous customers

thirteen Good cost performance, perfect after-sales service, quality assurance one Years, life-long maintenance

Main technical parameters


Index value

Rated voltage


Design temperature


heating rate

≤ 0.1-40 ℃ / min (adjustable)

Heating element

High quality imported resistance wire / high quality U-shaped silicon carbide rod / high-quality U-type silicon molybdenum rod

control accuracy


vacuum degree

-0.1mpa (high vacuum can be reached 300pa

temperature control

Microcomputer control, PID regulation, intelligent micro-computer control, multi-stage programmable temperature control curve, no need to watch (full-automatic heating, heat preservation, door opening and power-off)

Temperature measuring element


Furnace material

Ceramic polycrystalline fiber  / Alumina fiber / Composite alumina fiber / High purity composite alumina fiber / Imported fiber

Vacuum pump

Rotary vane mechanical pump


Floating ball flowmeter

Passable gas

Inert protection gas nitrogen, argon and oxygen can be introduced

Oxygen content in furnace

Continuous monitoring Oxygen content in furnace, detected ≤ 1000ptm Oxygen content of

Furnace door structure

Front door side opening

Heat dissipation mode

Double shell, air insulation

Surface temperature rise


Random gift

There are 2 heating rods, 2 rods, 1 crucible pliers, 1 pair of fire-resistant gloves, and 1 Certificate for each instruction

Selection Guide( Selection Guide)


Heating zone length( mm

Furnace tube diameter( mm

Supply voltage( V

Power( KW

control accuracy

LYL- SZKL -100/X

one hundred






one hundred and fifty




± one

LYL- SZKL -200/X

two hundred




± one

LYL- SZKL -300/X

three hundred




± one

LYL- SZKL -400/X

four hundred


three hundred and eighty


± one

LYL- SZKL -500/X

five hundred


three hundred and eighty


± one

LYL- SZKL -600/X

six hundred


three hundred and eighty


± one

LYL- SZKL -800/X

eight hundred


three hundred and eighty


± one

LYL- SZKL -1000/X

one thousand


three hundred and eighty


± one

LYL- SZKL -1200/X

one thousand and two hundred


three hundred and eighty


± one

LYL- SZKL -1500/X

one thousand and five hundred


three hundred and eighty


± one

Temperature category

eight hundred -1800 Optional temperature

Non standard customization

According to the needs of customers, we can customize the experimental furnace of different sizes

Standard accessories





High temperature gloves


one double

It has good comfort and can keep hands warm; it is resistant to cutting, wear and heat (it can resist contact heat at 350 ℃ for 60 seconds, and 100 ℃ for 180 seconds) for long-lasting durability.


Heating element

Silicon carbide


two branch

Silicon carbon components and use temperature is high, hard and brittle, used after molding, such as silicon carbide made of silicon carbide rod, silicon carbon tube heating temperature can reach one thousand and five hundred The operating temperature is 1000-1200 ℃ in vacuum and 1350 ℃ in nitrogen atmosphere

Silicon molybdenum rod


two branch

When heated to high temperature in oxidizing atmosphere, a dense quartz glass film is formed on the surface of the rod to protect it from oxidation. Therefore, Si Mo rod has high temperature oxidation resistance. In the oxidation atmosphere, the temperature can reach one thousand and eight hundred It can be used as heating element of high temperature furnace for electronics, ceramics, magnetic materials, glass, metallurgy, refractory, etc.

Crucible tongs


one hold

1. A common chemical instrument. It is usually used to clamp the crucible. It is generally made of stainless steel, or nonflammable and refractory hard materials.

2. Clean crucible tongs are required.

3. When taking out the hot crucible with crucible tongs, it is necessary to preheat the tongs first, so as to prevent the crucible from cracking due to local cooling. After use, the tongs should be placed upward on the table top or asbestos net.

4. After the experiment, the crucible tongs should be wiped clean, put into the experimental equipment cabinet, and placed dry.

5. The bending part is used for holding the crucible, and the tip is used for other purposes.

6. The crucible tongs may not be used together with the crucible, but can also be used alone.

Optional accessories list

Separate control cabinet

Touch screen instrument

Remote auxiliary module

Crucible hook

reducing pipe

Tube rotation / Tiltable

Crucible, Shi Yingzhou

Pipe plugging

Vacuum pump

Corundum tube / quartz tube


Centralized control industrial computer


Multipoint temperature measurement

Tail gas purification and treatment device

Special note

Quality assurance

The whole machine is guaranteed for one year, with the exception of related consumables (except for base plate and heating elements) and lifelong on-site maintenance

Factory environment

one Indoor use;

two The ambient temperature is in the range of ± 5-45 ℃;

three The relative temperature of the surrounding environment should not exceed 85%;

four There is no conductive dust, explosive gas and corrosive gas that can seriously damage metal and insulation around the furnace.


one When the electric furnace is used for the first time or used again after long-term shutdown, it is necessary to dry the furnace, otherwise it is easy to cause furnace cracking.

two Keep it clean and regularly check whether the furnace wiring is in good contact.

three When the electric furnace is used, the furnace temperature shall not exceed the rated temperature to avoid damaging the heating elements. It is forbidden to pour various flammable liquids and molten metals into the furnace.

four In the process of working, generally below 300 ℃, the heating rate should not be too fast. As the furnace is cold at the beginning of heating, it needs to absorb a lot of heat.

after-sale service

one We promise to solve the customer's technical questions within 1 hour.

two For the equipment returned to the factory for repair, we promise to issue the test results within 1 working day and complete the repair within 3 working days. Special materials need to be customized and handled as appropriate.

three Return visit the user within 1 week after the equipment is returned to the customer, and provide free consultation on relevant technology.

Friendly tips

one For the normal service life of the equipment, please do not operate at the set temperature for a long time.

two Carefully check and check the quantity of goods and accessories when receiving goods, so as to avoid inconvenience caused by less delivery and missing delivery.

three In order to prolong the service life of the instrument, we suggest that the heating rate and cooling rate should be 10 ℃ / min.

four The cooling rate should not exceed 5 ℃ / min

five The furnace has no vacuum sealing structure, so flammable and explosive gas can not be introduced.

six After the furnace is used for a period of time, tiny cracks will appear in the furnace, which is a normal phenomenon and will not affect the use. At the same time, it can be repaired with alumina coating.

Common Faults & troubleshooting

Fault phenomenon

Cause of failure

Exclusion method

Turn on the control power switch without power supply indication

Control circuit, fuse broken, no power supply

Check whether there is a short circuit and replace the fuse tube after removing it

When the equipment is running, there is voltage and no current

Heating element broken

Replace the heating element

The instrument PV shows the upper limit temperature of the corresponding thermocouple

Thermocouple short circuit

Replace the thermocouple

The power supply is normal, but the furnace can not be heated

The main control circuit is damaged

Inform professional maintenance personnel for maintenance

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