Alumina Ceramic Thermal Tube Blocks for Tubes OD 40mm to 250mm
Reference:
Manufacturer: Across International
A pair of high quality alumina ceramic (Al2O3) thermal blocks for high temperature tube furnaces. These refractory blocks must be placed in front of vacuum sealing flanges to minimize heat damage to the silicone sealing gasket.
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Tolerance Range: 2-3mm
Thermal blocks sit inside the process tube between the heated zone and the sealing flanges. They block heat travelling along the tube, which keeps the flanges and their gaskets cooler and helps hold a good seal over many runs.
Block sizes are matched to the tube: ceramic and quartz tubes of the same outside diameter take different blocks, because their inside diameters differ. Check the specifications table for your tube's OD and material; sizes cover tubes from 40mm up to 250mm OD.
Alumina is a refractory material, so the blocks tolerate the same high temperatures as the furnace tube they protect.
| Tube Size | Thermal Block Size |
| 40mm OD tubes | OD: 30.2mm, L:84mm |
| 50mm OD ceramic tubes | OD: 35.1mm, L:83.8mm |
| 50mm OD quartz tubes | OD: 42mm |
| 60mm OD ceramic tubes | OD: 44.3mm, L:86mm |
| 60mm OD quartz tubes | OD: 50mm |
| 80mm OD ceramic tubes | OD: 65mm |
| 80mm OD quartz tubes | OD: 70mm |
| 100mm OD ceramic tubes | OD: 84mm |
| 100mm OD quartz tubes | OD: 90mm |
| 120mm OD tubes | OD: 104.6mm, L:80.7mm |
| 150mm OD tubes | OD: 134.5mm, L:80.9mm |
| 200mm OD tubes | OD: 186 mm, L: 82 mm |
| 250mm OD tubes | OD: 236.2mm, L:80.7mm |
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