The declining airtightness of the experimental furnace door is causing temperature fluctuations. Which components should be inspected and maintained?
2026-04-10
A decline in the sealing performance of the experimental furnace door directly leads to heat loss, causing temperature fluctuations within the furnace and compromising the accuracy of experimental results.
A decline in the sealing performance of the experimental furnace door can directly lead to heat loss, causing temperature fluctuations within the furnace and compromising the accuracy of experimental results. To address such issues, it is essential to thoroughly inspect the following components and implement appropriate maintenance measures:
Seal Condition: The furnace door sealing ring and the observation window gasket are critical components. Prolonged exposure to high temperatures can cause the sealing materials to age and crack, so their integrity should be inspected every six months. If any deformation, hardening, or damage is detected, replace the seals promptly with products that meet the required temperature‑resistance specifications—such as high‑temperature silicone rubber or asbestos substitutes—and apply a high‑temperature‑resistant silicone grease during installation to ensure a secure fit.
Furnace door structure: Loosening of the door hinges and locking mechanism can result in an imperfect seal. Regularly inspect the hinge lubrication and apply high‑temperature‑resistant greases such as molybdenum disulfide to prevent mechanical binding; at the same time, adjust the locking mechanism to ensure even force distribution when the door is closed, with no visible gaps allowing light to pass through.
Furnace body mating surfaces: The contact surface between the furnace door and the furnace body may deform due to thermal expansion or mechanical impact. Use a feeler gauge to check the gap; if it exceeds 0.5 mm, corrective measures are required, and, if necessary, the contact surfaces should be lapped to ensure flatness.
Auxiliary sealing measures: For high‑temperature furnace types, ceramic fiber rope or metal sealing strips may be installed along the furnace door edge to enhance local sealing performance. If the furnace chamber exhibits abnormal negative pressure, the induced draft fan parameters should be checked concurrently to prevent backflow of cold air caused by pressure imbalance.
Next:
Related Questions
Precautions for Using Silicon Carbide Rod
Before installing the Silicon Carbide Rod, first check the resistance (Ω) marked on the cold end, then perform resistance matching; the resistance variation within each group should be within ±0.1. After the rod passes through the holes on both sides (or top and bottom) of the furnace wall, it should be able to rotate freely through 360 degrees, and forced installation or hammering must be strictly avoided.
Use and precautions of Silicon Carbide Rod in the glass industry?
In a glass furnace, as the molten glass flows through the cooling and homogenizing sections, it should be uniformly cooled to a temperature suitable for forming. If no measures are taken, the sides of the feeder channel will lose heat more rapidly than the central region.
Email:william@songyuht.com
Address: Sanlizhuang High-Tech Industrial Park, Dengfeng City, Henan Province
Access Industry Solutions
We will contact you within one business day. Please check your email.