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русский1. Protective equipment for check valve
In order to avoid the leakage of the check valve or the backflow of the medium after it takes effect, causing the production quality to drop, causing accidents and other undesirable results, one or two shut-off valves are installed before and after the check valve. If two shut-off valves are provided, the check valve can be easily assembled and maintained.
2. Protective equipment of safety valve
Before and after the installation method, the isolation valve is generally not set, as long as the rod is used under normal conditions. If the medium force contains solid particles, which affects that the safety valve cannot be closed tightly after it jumps, a gate valve with a lead seal should be installed before and after the safety valve. The gate valve should be in the fully open state. Introspection valve to atmosphere.
When the medium such as wax to be released is in solid form at room temperature, or when the temperature of the medium such as light liquid is lower than 0 degrees Celsius due to decompression and gasification, the safety valve needs steam tracing. For safety valves used for corrosive media, depending on the corrosion resistance of the valve, consider adding a corrosion-resistant explosion-proof membrane at the valve outlet. The gas safety valve is generally equipped with a bypass valve according to its diameter, which is used for manual venting.
