The copper valve is blocked, inflexible or unable to open and close normally, or even unable to continue to open and close, mainly due to the jamming between the valve rod and other parts, mainly the jamming between the valve rod and the packing. Generally, there are:
 
The packing gland deviates and then touches the valve rod.
 
- treatment method: correct installation
 
。 Packing not installed correctly or pressed too tight
 
- treatment method: pre tighten the packing and loosen the packing properly.
 
Stem and packing gland
 
- treatment method: replace or repair.
 
Bite or bite between parts
 
- treatment method: properly lubricate the valve rod.
 
The valve sealing surface is scratched, the stem smooth column part is scratched and the stem thread part is scratched, etc.
 
After grinding the sealing surface, there are abrasive particles embedded in the sealing surface, which are not cleaned up, resulting in the abrasion of the sealing surface; some abrasive particles are washed by the medium after being used, and the abrasive particles are discharged and stuck on the sealing surface, resulting in abrasion after being opened and closed by the valve.
 
- treatment method: select Abrasives reasonably and clean the sealing surface after grinding.
 
The dirt or welding slag in the medium is not removed, resulting in scratch.
 
- treatment method: clean it again.
 
The valve rod collides with the packing pressing sleeve and packing pad, and then the medium containing boron will crystallize and form hard particles after being discharged. When the packing contacts with the valve rod, the valve rod surface will be damaged during the switch.
 
- treatment method: correctly install and adjust the fitting clearance of parts and improve the surface hardness of valve rod. Contamination at trapezoidal thread, poor lubrication condition; deformation of valve rod and related parts
 
- treatment method: remove the dirt, apply lubricant to the high temperature copper valve in time, and correct the deformed parts.