My colleagues and I were learning on how to dismantle a gate valve. Here are the steps taken:-
1. Mark the component with a marker.
2. Open all the nuts or unbolt them to separate the components.
3. There is a gate disk inside the valve body where it is taken out using grip flier.
4. Clean all the components by brushing and then apply grease on them except for gate disk.
5. Apply the graining patch on the surfaces of gate disk for lapping to remove scratches and for flat surfaces.
Then, wipe it with a towel (avoid brush - scratches)
6. Then, the general gasket was cut in a correct shape to fit in the between the end surface og valve bonnet and valve body.
7.The components were re-assembled and the nuts were tighten.
Using centre dot punch and a hammer to make holes for the gasket..
Making and cutting the gasket..
The gasket can be fit perfectly..
