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Aftermarket seal ring for the protective lens drawer of SUP (Chaoqiang Weiye) SUP20S, SUP20T, SUP21T, SUP23S, SUP23T and SW150 handheld welding guns. The seal holds the 18 x 2 mm protective lens flat and stops fume and shielding gas getting past it to the focusing lens.
21 x 15 x 2.7 mm (outside diameter x inside diameter x thickness). High temperature PTFE with a stainless steel spring core. Replace the seal when it is flattened, hard or discoloured, ideally every few lens changes. Sold singly or in packs of 5 or 10.
| Size | 21 x 15 x 2.7 mm (OD x ID x T) |
| Material | PTFE with stainless steel spring |
| Protective Lens | 18 x 2 mm |
| Fits | SUP (Chaoqiang Weiye) SUP20S, SUP20T, SUP21T, SUP23S, SUP23T and SW150 handheld welding guns |
| Pack Options | 1, 5 or 10 seals |
Handheld welding guns
Check the size against the part you are replacing.
| Gun | Specification | Fits | SPM Part Number(OEM no. where one exists) |
|---|---|---|---|
| SUP, 21 x 15 x 2.7 mm (18 x 2 lens) | 21 x 15 x 2.7 mm | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150 | SPM-LAS-2181 |
| Gun | Fits |
|---|---|
| Qilin, 20.5 x 16 x 2.5 mm (20 x 2 lens) | Qilin handheld |
| WSX, 20.5 x 16 x 2.4 mm (18 x 2 lens) | WSX handheld |
| Ospri, 21 x 15 x 3 mm (20 x 3 lens) | Ospri handheld |
| Hanwei, 22 x 16 x 2.9 mm (20 x 4 lens) | Hanwei handheld |
Lens keeps cracking
A hard or flattened seal lets the protective lens shift and heat unevenly. If lenses crack early, change the seal.
Dirty focusing lens
Fume that gets past a worn seal settles on the focusing lens. A new seal keeps the optics clean.
Lens changes
Keep seals with your protective lenses and change both together every few lens changes.
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It fits SUP (Chaoqiang Weiye) SUP20S, SUP20T, SUP21T, SUP23S, SUP23T and SW150 handheld welding guns with the 18 x 2 mm protective lens. Measure the old seal: it should be 21 x 15 x 2.7 mm (outside diameter x inside diameter x thickness).
No. They are aftermarket seals made to the same size. The gun name is given so you can choose the right one.
Yes. Shipping options and costs for your country are shown at checkout.
