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For valves that are not frequently opened and closed, the handwheel should be turned regularly and lubricant should be added to the valve stem thread to prevent seizure.

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.