WLT-20JSL Pit-type Lifting Furnace

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PRODUCT INTRODUCTION

Brief Introduction

The WLT-20JSL series pit-type elevating furnace introduces internationally advanced technology., environmentally friendly electric furnace, developed through independent R&D by integrating advanced technologies. The equipment features a modern, aesthetically pleasing design, a sophisticated and rational structure, and is simple and convenient to operate. The exterior casing is crafted from high-quality cold-rolled steel plate, processed with precision CNC machine tools, and finished with a premium, durable two-tone imported epoxy powder electrostatic spray coating, providing resistance to high temperatures, corrosion, and permanent color retention.

The furnace offers a uniform temperature field, a double-layer insulated furnace body that keeps the surface temperature close to ambient, and adjustable heating rates. The furnace chamber is constructed from imported high-temperature composite fiber materials using a CNC process, ensuring excellent thermal shock resistance, tolerance to rapid heating and cooling, corrosion resistance, and is resistant to sagging, crystallization, and dusting, with no pollution and a long service life.

The control system utilizes microcomputer-based intelligent regulation technology, featuring PID adjustment, fully automatic control, and self-tuning capabilities. It supports multi-segment programmable profiles for various heating, holding, and cooling steps, achieving high temperature control precision, excellent energy efficiency, and high stability.

The protection system includes independent safeguards against: over-temperature, over-voltage, over-current, thermocouple break, power failure, leakage, and short circuit.

The furnace hearth platform is liftable. The electric system allows the platform to be extended out of the furnace body, facilitating material loading and unloading and improving work efficiency.

Furthermore, through our self-developed control software, the furnace can be connected to a computer, enabling remote control (start/stop), program setting, program storage, historical curve viewing, and printing for a single furnace or multiple units.

Application

This equipment is widely used in universities, research institutes, and industrial and mining enterprises. It is an ideal device for experiments and production involving powders, electronics, metallurgy, pharmaceuticals, ceramics, sulfur, glass (new materials), chemicals, metal sintering, and metal heat treatment.

Qualification & Honor

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.

Main Functions & Features

1. Energy Efficient & Eco-Friendly

The furnace chamber is constructed from high-purity composite alumina or ceramic polycrystalline fiber. This material is lightweight, offers low heat storage, and significantly reduces energy consumption, allowing the unit to operate efficiently at an average of half power.

2. Convenient Maintenance & Time-Saving

Heating elements utilize high-quality resistance wire, silicon carbide rods, or molybdenum disilicide rods. These components ensure a long service life and are designed for quick and easy replacement.

3. Integrated Furnace & Control Design

The compact structure integrates the furnace body and control system into a single unit. This design saves valuable floor space while providing flexible and convenient operation.

4. High-Precision Temperature Control

Equipped with top-tier instruments, the system achieves precise temperature control with an accuracy of ±1°C. All instruments can be supplied with third-party inspection certificates upon request.

5. Excellent Temperature Uniformity

Featuring four-side heating with a rational layout, the furnace ensures a balanced temperature field throughout the chamber, eliminating any cold spots or dead zones.

6. Programmable Microcomputer Control

The microcomputer controller allows for adjustable heating rates and fully automated operation, requiring no manual supervision during the process.

7. Comprehensive Safety Protection

The system includes automatic protection and alarm functions for over-temperature, over-pressure, over-current, leakage, thermocouple failure (broken couple), and heating element failure (broken rod).

8. Stable Bottom Lifting Mechanism

The electric lead screw lifting mechanism at the furnace bottom ensures smooth, vibration-free movement, facilitating safe and convenient loading and unloading of materials.

9. Wide Range of Applications

Ideal for universities, research institutes, and industrial enterprises engaged in powder processing, military, electronics, metallurgy, pharmaceuticals, ceramics, glass, machinery, new material development, specialty materials, refractories, building materials, chemicals, metal sintering, and heat treatment.

10. Dual-Layer Shell Structure

Designed with a double-layer shell and an air convection insulation layer to maintain a low surface temperature and ensure operator safety.

11. Aesthetic Exterior

The shell features a durable powder-coated finish with a stylish two-tone color scheme, presenting an elegant and professional appearance.

12. Trusted Market Reputation

Backed by positive customer feedback and a broad client base across various industries.

13. Excellent Value & After-Sales Service

Offers a high cost-performance ratio with complete after-sales support, including a 1-year warranty and lifetime on-site maintenance.

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PRODUCT PARAMETERS

Main Technical Parameters

Item	Specification
Rated Voltage	380V 50/60Hz
Heating Rate	≤1~40℃/min (Humanized Adjustable)
Temperature Control Accuracy	±1℃
Control Method	PID adjustment, microcomputer control, programmable temperature control curve, no need for supervision (automatic heating, holding, cooling)
Dual-loop Protection	Overtemperature, overpressure, overcurrent, short circuit, broken couple, power failure, leakage, etc.
Thermocouple Model	S-type
Heating Element	U-type Silicon Carbide Rod
Furnace Chamber Material	The furnace chamber is constructed using imported composite high-temperature fiber materials through CNC technology, featuring strong thermal shock resistance, good corrosion resistance, no collapse, no crystallization, no slag drop, non-polluting, and a long service life.
Lifting Structure	Lead screw lifting, smooth without vibration, downward furnace opening, low heat loss, the furnace door can be opened for circulation operation under high temperature conditions.
Surface Temperature	≤45℃
Temperature Category	800℃ 1000℃ 1200℃ 1400℃ 1600℃ 1700℃ 1800℃ 2200℃

Furnace Chamber Effective Dimensions & Specifications

Furnace Chamber Effective Dimensions (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:

Furnace chamber dimensions and temperature can be customized according to customer requirements.
Lifting System: Lead screw screw lifting, hydraulic lifting (electric, manual) optional.
Material Tray System: Single material tray and multi-material tray (electric, manual) optional.
Electrical Control System: Computer control, touch screen control, microcomputer control optional.

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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 Furnace Temp. Control	Touchscreen Instrument	Remote Auxiliary Module
Observation Window	Exhaust Hole & Chimney	Hot Air Fan
Crucible, Casserole, Material Rack	Multi - material Table	Furnace Bottom Plate
Air Blowing	Thermocouple	Centralized Control Industrial Computer
Caster Wheel	Multi - point Temperature Measurement	Exhaust Gas Purification Device
Hydraulic Lifting (Manual/Auto)	Material Table Tilting	Vacuum & Atmosphere

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

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OUR STRENGTH

STRENGTH

The company specializes in various high-precision electric furnaces and kilns

QUALITY

Every product undergoes multiple quality inspections before leaving the factory to ensure stable operation of each one

FULL RANGE

The product range is diverse and comprehensive, meeting the diverse needs of users

SERVICE

Provide quality assurance services as required, offer free repairs for quality issues, and provide free technical support

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CONTACT US

DESCRIPTION:

PRODUCT INTRODUCTION