In view of the difficulty in the disassembly of the spiral wound gasket, the Yaang Technology Department summarized the following points and the disassembly sequence for your reference.
1. Unloading method
Symmetrical, uniform, take turns to loosen the flange bolts 1/4 to 1 turn, and then officially remove the bolts.
2. Derusting method
The thread is saturated with kerosene or rust remover, removes rust, increases lubrication, and facilitates the removal of parts.
3. Expansion method
Use a tool such as wedge iron to insert between the flanges and loosen the flange to be unloaded.
4. Pole method
For the rust-dead, bonded gasket, first remove the bolt, then close the valve, and open the valve cover with the valve stem.
5. Knocking method
Use a copper rod, a hammer, etc. to tap the valve body to loosen the parts and washers.
6. Wetting method
Soak the gasket with solvent, kerosene, etc. to soften or peel off the sealing surface and remove it.
7. Punching method
It is fixed by four open loops, and the gap between the ring grooves is small and there is no wrench position. It is difficult to disassemble after the four open loops of the candle. The hole can be removed from the groove outside the valve, and the four open rings can be removed with a flat head.
Use the blade to sharpen the sealing surface and remove the gasket and its residue. This method is especially suitable for rubber gaskets and rubber asbestos gaskets.
spiral-wound gasket removal sequence: Remove the pre-tightening force on the spiral-wound gasket, open the static sealing device, take out the spiral-wound gasket, and remove the spiral-wound gasket residue.
Source: China Stainless Steel Gaskets Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)