Pit Furnace

LYL-12JSL High-Temperature Pit Furnace

DESCRIPTION:

Model No: LYL-12JSL
Heating Rate: ≤0.1-40°C/min
Rated Voltage: 220V/380V
Chamber Size: Customizable
Design Temperature: 800°C-1800°C
Temperature Control Accuracy: ±1°C
Temperature Measuring Element: K (0-1300°C) / S(0-1600°C)/ B (0-1820°C)

Customization > Get A Quote

PRODUCT INTRODUCTION

Brief Introduction

The LYL-12JSL series high-temperature energy-saving pit furnace is a new energy-saving and environmentally friendly electric furnace independently researched, developed and manufactured with the introduction of advanced technologies.

It features an advanced and reasonable structure as well as an elegant and generous appearance. The outer shell is made of high-quality cold-rolled steel plate processed by advanced CNC machine tools, and finished with luxurious and aesthetic imported two-color epoxy powder electrostatic spraying technology. It delivers excellent high temperature resistance and corrosion resistance. Fitted with premium heating elements and an air cooling system between the double-layer furnace shell, the furnace enables rapid cooling.

It enjoys the advantages of uniform temperature field, low furnace surface temperature, fast heating and cooling rate, and high energy efficiency. The furnace chamber is constructed of imported composite alumina fiber materials by CNC forming technology, featuring outstanding thermal shock resistance and corrosion resistance. It will not collapse, crystallize, shed residues or cause pollution, and serves a long service life.

The control system adopts microcomputer artificial intelligence regulation technology, equipped with PID regulation, automatic control and self-tuning functions, as well as multi-section program programming. It can compile various heating, holding and cooling procedures with high temperature control accuracy. It adopts integrated module SCR control and phase-shift triggering. The protection system provides independent protections against over-temperature, over-pressure, over-current, electric leakage and short circuit. With a high degree of automation, all technical indicators have reached the advanced industry level.

Application

This equipment is widely used in universities, scientific research institutes, industrial and mining enterprises for experimental and production purposes involving powder, electronics, metallurgy, medicine, ceramics, new materials, chemical engineering, metal sintering and metal heat treatment.

Qualifications & Honors

ISO 9001:2015 Quality Management System Certification
CE Certification (EU Conformity)
Luoyang City "Model Enterprise for Civilized and Honest Operation"
"Leading Brand in China's Electric Furnace Industry"
"AAA Enterprise for Quality, Service, and Creditworthiness"
Products can withstand testing by authoritative inspection institutions; third-party verification certificates can be provided upon request.

PRODUCT PARAMETERS

Main Technical Parameters

Item	Value
Rated Voltage	380V 50/60Hz
Heating Rate	≤1-40℃/min (humanized adjustable)
Temperature Control Accuracy	±1℃
Control Mode	Adopting microcomputer intelligent program instrument (automatic programmable heating/holding/cooling) PID regulation
Dual-loop Protection	Overtemperature, overpressure, overcurrent, short circuit, open circuit, power failure, leakage, etc.
Thermocouple Type	K/E/S Type
Heating Element	Resistance wire/U-type silicon carbon rod/silicon molybdenum rod
Chamber Material	The chamber is made of imported composite high-temperature fiber material constructed by CNC process, with strong thermal shock resistance, good corrosion resistance, no collapse, no crystallization, no slag dropping, no pollution, and long service life
Furnace Door Structure	Front-opening upward
Surface Temperature	≤45℃
Temperature Range	800℃ 1000℃ 1200℃ 1400℃ 1600℃ 1700℃ 1800℃ 2200℃

Selection Guide

Effective Chamber Size (mm)	Voltage (V)	Power (kW)	Control Accuracy (℃)
Φ300×300	380	10	±1
Φ500×500	380	25	±1
Φ700×500	380	30	±1
Φ800×500	380	40	±1
Φ1200×800	380	80	±1

Note:

The chamber can be made in round or square shape, and dimensions and temperature can be customized according to customer requirements.
Electrical control system: Computer control, touch screen control, and microcomputer control are optional.

STANDARD ACCESSORIES

Standard Accessories

Name		Picture	Quantity	Description
High-temperature Gloves			1 pair	Excellent comfort, keeps hands warm; Cut-resistant, abrasion-resistant, and heat-resistant (withstands contact with 350°C heat for 60 seconds, 100°C heat for 180 seconds). Durable.
Heating Elements	Silicon Carbide Rods		2 pieces	Silicon carbide elements, characterized by their high operating temperature, hardness, and brittleness, are ready for use after formation. For instance, silicon carbide rods and tubes, made from silicon carbide, can achieve a heating temperature of up to 1500°C under dry air conditions. Under vacuum conditions, the operating temperature ranges from 1000°C to 1200°C, while in a nitrogen atmosphere, the long-term use temperature reaches 1350°C.
Heating Elements	Silicon Molybdenum Rods		2 pieces	Silicon molybdenum rods, when heated to high temperatures in an oxidizing atmosphere, form a dense layer of quartz glass on the surface, protecting them from further oxidation. Therefore, silicon molybdenum rods exhibit high-temperature oxidation resistance. In an oxidizing atmosphere, they can reach temperatures up to 1800°C, making them suitable as heating elements for high-temperature furnaces in industries such as electronics, ceramics, magnetic materials, glass, metallurgy, and refractories.
Crucible Tongs			1 piece	1.A common chemical instrument typically used for handling crucibles. Generally made of stainless steel or other non-flammable, oxidation-resistant hard materials. 2.Clean crucible tongs must be used. 3.When using crucible tongs to pick up a hot crucible, the tips should be preheated first to prevent the crucible from cracking due to localized cooling. After use, the tongs should be placed on a table or asbestos mat with the tips facing upward. 4.After the experiment, crucible tongs should be cleaned, dried, and stored in the laboratory equipment cabinet. 5.Use the curved section for gripping crucibles; the tips are for other purposes. 6.Crucible tongs are not necessarily used exclusively with crucibles; they can also be used independently.

Optional Accessories List

Integrated Control	Touch Screen Instrument	Remote Auxiliary Module
Observation Window	Exhaust Hole and Chimney	Hot Air Fan
Crucible, Boat	Door Plug	Furnace Bottom Plate
Forced Draft	Thermocouple	Centralized Control Industrial Computer
Caster Wheel	Multi-point Temperature Measurement	Exhaust Gas Purification Device

Special Note

Item	Content
Factory Environment	1. Indoor use; 2. Ambient temperature range: ±5~45℃; 3. Relative humidity of surrounding environment does not exceed 85%; 4. No conductive dust, explosive gases, or gases that can severely damage metals and insulating materials around the furnace.
Safety Protection	1. When using the electric furnace for the first time or after long-term shutdown, baking is required; otherwise, it is easy to cause furnace cracking. 2. Keep clean regularly and check whether the furnace wiring is in good contact. 3. When using the electric furnace, 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. 4. During operation, generally below 300℃, the heating rate should not be too fast, because the furnace chamber is cold at the beginning of heating and needs to absorb a lot of heat.
Friendly Tips	1. To ensure the normal service life of the equipment, please do not run at the rated temperature for a long time. 2. Carefully check and verify the quantity of goods and accessories upon receipt to avoid inconvenience caused by missing or incorrect items. 3. To extend the service life of the instrument, we recommend a heating rate and cooling rate of 10℃/min. 4. The cooling rate should not exceed 5℃/min. 5. This furnace has no vacuum sealing structure, so flammable and explosive gases must not be introduced. 6. After this furnace has been used for a period of time, slight cracks may appear in the furnace chamber, which is a normal phenomenon and will not affect usage. At the same time, it can be repaired with alumina coating.

Item

Content

Factory Environment

1. Indoor use;

2. Ambient temperature range: ±5~45℃;

3. Relative humidity of surrounding environment does not exceed 85%;

4. No conductive dust, explosive gases, or gases that can severely damage metals and insulating materials around the furnace.

Safety Protection

1. When using the electric furnace for the first time or after long-term shutdown, baking is required; otherwise, it is easy to cause furnace cracking.

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

3. When using the electric furnace, 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.

4. During operation, generally below 300℃, the heating rate should not be too fast, because the furnace chamber is cold at the beginning of heating and needs to absorb a lot of heat.

Friendly Tips

1. To ensure the normal service life of the equipment, please do not run at the rated temperature for a long time.

2. Carefully check and verify the quantity of goods and accessories upon receipt to avoid inconvenience caused by missing or incorrect items.

3. To extend the service life of the instrument, we recommend a heating rate and cooling rate of 10℃/min.

4. The cooling rate should not exceed 5℃/min.

5. This furnace has no vacuum sealing structure, so flammable and explosive gases must not be introduced.

6. After this furnace has been used for a period of time, slight cracks may appear in the furnace chamber, which is a normal phenomenon and will not affect usage. At the same time, it can be repaired with alumina coating.

Common Faults & Trouble Shooting

Fault Phenomena	Fault Causes	Troubleshooting Methods
No power indication when turning on the control power switch	Control circuit issue, blown fuse, or no power supply	Check for short circuits, rectify, and replace the fuse
Voltage present but no current during equipment operation	Heating element broken	Replace the heating element
Instrument PV display shows the maximum temperature for the corresponding thermocouple type	Thermocouple short circuit	Replace the thermocouple
All power supplies normal but furnace does not heat up	Main control circuit damaged	Notify a qualified technician for repair