Wash leakage:
is mainly due to its inefficiency and inability to adapt to working temperature and working pressure; and the temperature changes of high-temperature valves.
uses a washer that is suitable for the working conditions. For new valves, check whether the material of the washer is suitable. If it is not suitable, it should be replaced. For high-temperature valves, tighten the bolts again when used.
valve body cracking:
is generally caused by freezing. When it is cold, the valve must have insulation and heat tracing measures. Otherwise, the water in the valve and connecting pipelines should be drained clean after production is stopped (if the valve bottom wire is blocked, the wire can be blocked and drained).
Handwheel damage:
impact or long lever force operation. As long as the operator and other relevant personnel pay attention, it can be avoided.
Filling gland cracked:
presses the filler uneven force, or the gland (usually cast iron) has defects. When pressing the filler, rotate the screws symmetrically and do not deviate. When manufacturing, you should not only pay attention to large and key parts, but also pay attention to secondary parts such as glands, otherwise it will affect your use.
valve stem and valve plate connection fail:
gate valve adopts a lot of connections between the valve stem rectangular head and the gate plate T-shaped groove. Sometimes the T-shaped groove is not processed, so the valve stem rectangular head wears faster. It mainly solves the problem from the manufacturing aspect. However, the T-shaped groove can also be reprocessed to give it a certain finish.
The gate of the double gate valve cannot be pressed tightly on the sealing surface:
The tension of the double gate plate is generated by the top wedge. Some gate valves have poor material (low grade cast iron) and will wear or break soon after use. The top wedge is a small piece with not much material used. The user unit can be made by carbon steel and replace the original cast iron parts.
