Annealing long shafts, steel wire coils, heavy forgings, and copper tubing requires a vertical heating solution that minimizes material distortion while ensuring uniform heat penetration. Our Pit-Type Annealing Furnace is designed with a vertical, deep-chamber layout that is installed below ground level, providing superior heat retention and structural stability for heavy industrial loads. For metal processing factories, space-saving designs and vertical loading are essential for handling long or bulky components; by using our Pit-Type Annealing Furnace, our clients are able to process large batches of raw metals under precise temperature profiles, successfully eliminating internal stresses and restoring material ductility.
With 24 years of custom manufacturing experience, we have optimized the heating zone of our Pit-Type Annealing Furnace with multi-zone temperature control. This allows our senior engineers to configure independent heating parameters along the entire depth of the pit, ensuring a temperature uniformity of ±5°C even in chambers deeper than 4 meters. Our rich history of supplying heavy-duty thermal systems to top-tier clients like BYD and Midea means we understand the mechanical stresses of vertical loading. We construct our furnaces with robust alloy retorts and heavy-duty cover lifting systems that operate smoothly for years of high-volume industrial operations.
| Chamber Depth | 1000 mm to 6000 mm (fully customizable) |
| Chamber Diameter | 800 mm to 3000 mm (fully customizable) |
| Max Temperature | 950°C |
| Atmosphere Options | Air, nitrogen, argon, or hydrogen-nitrogen protective mixtures |
| Lifting Mechanism | Hydraulic or electromechanical crane-type cover lift |
Application Fields
Long Shaft Annealing
Stress-relieving heat treatment for vertical shafts, rods, and drill pipes.
Wire & Strip Coils
Bulk bright annealing of copper, aluminum, or steel wire spools and metal coils.
Forgings & Castings
Full annealing of large iron or steel forgings to improve machinability.
Heavy-Duty Customization
We recognize that no two industrial workshops are the same. Our R&D team can customize the chamber diameter and depth of your Pit-Type Annealing Furnace to match your overhead crane capacity and product dimensions. We can also integrate automated vacuum purging systems to reduce nitrogen gas usage, as well as configure customized gas-circulating fans for rapid cooling cycles.
After-Sales Assistance
Your purchase is protected by our comprehensive 1-year warranty and a dedicated after-sales support channel. Our team of experienced technicians is ready to assist with remote diagnostics, and we can rapidly deploy field technicians to your site for equipment commissioning, operator training, and preventative maintenance. We maintain a full warehouse of genuine spare parts to minimize lead times for any required replacement components.
FAQ
Q: Can this furnace handle protective atmosphere annealing?
A: Yes. We can equip the furnace with a gas-tight stainless steel retort and atmosphere control panel to allow the injection of nitrogen, argon, or other protective gases to prevent oxidation.
Q: How do you ensure the temperature is uniform in a very deep pit?
A: We divide the heating elements into multiple vertical control zones. Each zone is regulated by its own thermocouple and PID controller to ensure uniform heat from the top to the bottom of the chamber.
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