Installation and maintenance manuals of Industrial valve are property under manufacturer's instructions.
However, if there are possible failure under inappropriate operation.1. For manual operated valve, there might be inflexible handwheel operation. There are two reasons, a. stem bent; b. thread demaged. The solution for a Replace a new stem; for b Repair thread and lubricated it.
The above is suitable for manual gate valve, manual globe valve, diaghram valve and so on.
2. For rubber lined valves there might be leaking from the connectin between body and bonnet, such as rubber lined diaghram valve, rubber lined butterfly valve, lined diaghram valve, lined butterfly valve. The reasons area. connect bolt loosenedb. body rubber-lined broken
The solutions for a tighten the bolt. for b.replace one new body.
3. There inner leakage, this might be happened at wedge gate valve, globe valve and ball valveThe reasons are a. valve is not competely closed.b. there are sands and dirty in valve bodyThe solutions area. closed the valve with larger force b. Clean passage especial body cavity
