Application of Cock Valve in PVC Resin Production Unit
In view of the special properties of the medium in the pipeline of PVC resin production plant, such as VCM poisonous and harmful, explosive easily under pressure, and polymer self-agglomeration easily in the pipeline, it is necessary to provide a set of pneumatic cut-off cock valve solutions for users.
Considering the scouring and adhering effect of the solution mixture on the surface of the bushing, high quality PTFE bushing can be formed around the whole passage by hot pressing at 360 lip edge. In normal operation, the solution medium adhering to the bushing surface can be scraped off naturally at 360 lip edge, while avoiding the distortion of the bushing and reducing the cold flow phenomenon.
Based on the easy accumulation of polymer in the pipeline, the self-lubricating structure of the cock without cavity can help to solve the possibility of PVC polymer aggregation in the cavity, and the cock can be adjusted by adjusting screw, which is simple and convenient to operate.
With three-layer seal, the first PTFE seal; the second V-type gasket with triangular pressure ring seal; the third enhanced safety stem packing, sealing performance up to grade 6, to ensure zero leakage under high pressure safe operation.