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Before opening the steam valve, the pipeline must be preheated and the condensate water must be discharged. Open slowly to avoid water hammer and damage to valves and equipment.

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Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Improper installation and use will directly affect the normal operation in the future, so attention must be paid.

Repairing valves under pressure is a complicated, dangerous and highly technical work. In addition to being bold, careful, cautious and decisive, maintenance of valves under pressure should also have a strict scientific attitude.