When the gap between the components of the fluorine lined DC cut-off valve exceeds the tolerance

     Fluorine lined DC globe valve During its use, there may sometimes be gaps that exceed the tolerance. In this case, how should we repair it?

For cylinder bodies with copper sleeves, we can repair them by replacing the copper sleeves. Firstly, the diameter of the plug rod of a set of fluorine lined DC check valves can be trimmed to a uniform size, and then the outer diameter can be polished with sandpaper of 1000 # or above. There are three methods for installing copper sleeves on the cylinder body: by heating and installing the cylinder body or by low-temperature freezing and extrusion of the copper sleeve to achieve its interference fit assembly; Assemble with Loctite adhesive, which requires grooves on the outer diameter surface of the copper jacket; Tap the cylinder hole, thread the outer diameter of the copper sleeve, apply Loctite adhesive, and screw it into the assembly.

2. If check valve The cylinder body and copper sleeve are fused together, and the repair methods include: using a grinding rod, manual or mechanical methods to grind and repair the cylinder hole; Using a coordinate boring machine to re bore the cylinder body hole; Use a reamer to repair the cylinder bore.

3. The latter and more advanced technology is the use of "surface engineering technology", which includes electroplating technology, that is, plating a layer of hard chromium on the surface of its plunger; Electric brush plating technology, which involves brushing wear-resistant materials on the surface of the plunger; Thermal spraying, arc spraying, or electric spraying, that is, spraying high carbon martensitic wear-resistant materials; Laser cladding is the process of depositing high hardness and wear-resistant alloy powder onto the surface of a plunger.

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