The common faults and solutions of PPR globe valves are as follows:
Valve stem rotation is not flexible.
This may be the spool cover is too tight or the bearing is damaged, the solution is to adjust the tightness of the packing or replace the bearing. There may also be debris or dust between the valve stem or valve stem nut, and the valve stem or valve stem nut is damaged. The solution is to disassemble and clean the valve stem, and replace the valve stem or valve stem nut if it is damaged. It may also be a failure of the opening and closing device, which needs to be repaired after checking the fault according to the device instructions.
The sealing surface is leaking.
This may be the sealing surface has dirt, need to clean the sealing surface. It may also be that the sealing surface is damaged, and the sealing surface needs to be polished or replaced.
The stuffing box is leaking.
This may be the loose filler or the filler gland pressure is biased, and the filler gland needs to be pressed evenly. It may also be that the filler fails and a new filler needs to be replaced.
The middle flange is leaking.
This may be that the flange connection bolt is not tightened or unevenly tightened, and the screw needs to be loosened and then re-tightened evenly and symmetrically. It may also be that the gasket is damaged or fails and needs to be replaced. It may also be that there is dirt between the sealing surfaces of the flange, and the cleaning flange needs to be removed.
Blocked.
This may be caused by foreign matter accumulation in the pipeline, scale deposition or unreasonable internal structure design of the valve, etc. The solution includes cleaning the pipeline, removing scale and replacing the appropriate valve.
In addition, there are some other failures, such as internal leakage, closing, etc., need to be analyzed and processed according to the specific situation.Chuangrong In the process of use, we should pay attention to observe and record the operation of the valve, discover and deal with the problem in time, in order to maintain its good working condition and extend the service life.
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