Problems in the application process of rising stem gate valve

When formulating and applying rising stem gate valves, the following problems and solutions must be considered.
The gate valve may leak in the gland, flange gasket or when the gate valve is damaged in the early stage of use or during use. It is conceivable that such leaks will continue to progress. If the liquid is used in a gate valve under very strict operating conditions (high temperature and high pressure), what kind of damage will occur? Can corrosive liquids accumulate in cable trays, and flammable liquids fall into hot containers? The heat flow of the alkaline solution will not cause damage to the operator.
Once disconnected, the gate valve maintains system pressure for a period of time. If the gate valve is to be opened or disassembled for backup, precautions must be taken to reduce this pressure. It is also important to take certain effective measures to reduce the accumulation of hazardous liquids.
When developing a gate valve system, the following aspects should be considered:
1. The control valve seal is formulated. The leakage rate of rising stem gate valve and single seat gate valve can reach less than 1 drop per hour. Double high pressure gate valve It is difficult to close the two high pressure gate valves. Therefore, it is important to consider the possibility of switching to single-seat gate valves.
2. If a large amount of high-pressure medium accumulates between the stop valves, it is likely to generate a very large force. If the pressure of the control valve is not careful during use, it is likely to cause obvious safety accidents.
3. Is the medium a gas, a clean liquid, or a liquid with suspended solids?
Even if the rising stem gate valve is well designed, the high pressure medium will inevitably accumulate when it is disconnected. It is therefore recommended: if the potential of the fluid is very dangerous, use an exhaust valve on both sides of the control valve.