PW-8401AX High Quality Series High-Temperature 400°C Drying Oven

1.1 Temperature Measurement: K-type thermocouple made of nickel-chromium-nickel-silicon

1.2 Control System: LTDE fully automatic programmable instrument with PID regulation and a display accuracy of 1°C

1.3 Electrical Components: Branded contactors, cooling fans, and solid-state relays are used;

1.4 Time Control: Features multi-stage temperature ramping, isothermal control, timed start, and has functions including up to 9999 minutes * 30 of pause time;

1.5 Over-Temperature Protection: Built-in secondary over-temperature protection device for double safety;

1.6 Operation Modes: Fully adjustable temperature control for constant operation and program execution.

II. Furnace Structure and Materials

2.1 Outer Chamber Material: The outer casing of the high-temperature drying oven is made from high-quality cold-rolled steel that has undergone a phosphate film and salt treatment, followed by high-temperature powder coating, with the color being computer gray.

2.2 Chamber Material: The interior chamber of the high-temperature drying oven is constructed with a stainless steel lining, featuring removable stainless steel electro-polished shelves and a tempered glass viewing window.

2.3 Internal Structure: The base of the oven is equipped with a specially designed high-temperature heating chamber and a gear-driven balanced wind wheel. The rational circulation air duct structure allows the air inside the box to be drawn into the heating chamber by the air-moving motor, circulated back into the working chamber through the air ducts, and then re-entering the heating chamber in a continuous cycle. This process achieves a comprehensive three-dimensional heating effect, ensuring uniform temperature distribution within the chamber. The unique geometric cavity design permits the shelves to be adjusted in height and quantity according to user requirements.

2.4 Insulation Material: A mixture of high-density silica cotton and lightweight fiber cotton is used for insulation, filled in the gaps between the front, back, left, right, top, and bottom layers of the casing.

2.5 Sealing Material: The oven door and chamber use a double sealing structure with high-temperature-resistant asbestos rope seals to ensure a tight seal, with a lockable handle on the door. A safety ventilation hole is located at the back of the casing (for the 8401-4AX model, the safety ventilation hole is positioned at the top).

2.6 Temperature Probe Port: The K-type sensor enters from the rear of the casing.

2.7 Wiring Terminals: The wiring terminals for the heating elements are located at the lower rear of the casing.

2.8 Controller: Situated at the bottom of the casing, it houses the built-in control system and connects to the PT100 sensor with compensating cables.

2.9 Heating Elements: Stainless steel electric heating elements.

2.10 Overall Weight: Approximately 109KG.

2.11 Standard Packaging: Wooden crate.

III. Heating System

3.1 Stainless steel heaters are located in the internal heating chamber of the box, controlled by the PT100 sensor in response to the control system.

3.2 The output of the stainless steel heaters is calculated and controlled by the microcomputer inside the LTDE fully automatic instrument.

IV. Air Circulation System

4.1 The circulation blower is located in the middle of the annular stainless steel heater in the internal heating chamber.

4.2 The high-temperature drying oven uses a long-shaft fan motor with multi-vane aluminum alloy blades to achieve horizontal convection and arc-shaped circulation of air within the box, ensuring uniform temperature and maintaining stability.

V. Safety Protection System

5.1 Non-fusible protector.

5.2 Over-temperature protector for the working chamber, with an upper limit alarm and cessation of heating upon over-temperature.

5.3 Independent over-temperature preventer and independent over-temperature protector.

5.4 Over-current protection for the blower.

VI. Main Components

7.1 Fully automatic control instrument.

7.2 Silicon controlled rectifier (SCR) (9013C, 9053C do not require SCRs, 9240C, 9640C use solid-state relays).

7.3 PT100 sensor.

7.4 Hot air circulation motor.

7.5 Stainless steel heater.