Common faults and maintenance of copper valves
The opening and closing of 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 jam of the valve stem and other parts, mainly the jam between the valve stem and the packing. Generally
The packing gland is deflected and hits the valve stem
Treatment method: install correctly
Packing is installed incorrectly or is too tight
Treatment method: pre-tighten the filler and loosen the filler appropriately.
Stem and packing gland bite
Treatment method: replace or repair.
Bites or bites between parts
Treatment method: Lubricate the valve stem appropriately.
Scratches on the valve sealing surface, bites on the light column of the valve stem and bites on the threaded portion of the valve stem. After the sealing surface is ground, there are abrasive particles embedded in the sealing surface, but it is not cleaned, causing the sealing surface to be scratched; after some use, the abrasive particles are discharged under the erosion of the medium and stick to the sealing surface. Cause abrasions.
Treatment method: Use abrasives reasonably, and clean the sealing surface after grinding.
The dirt or welding slag in the medium is not cleaned up, causing scratches.
Treatment method: clean again.
The valve stem rubs against the packing pressure sleeve and packing pad, and the medium containing boron will crystallize to form hard particles after it is discharged. When the packing contacts the valve stem, the surface of the valve stem will be strained when switching.
Treatment method: correct installation, adjust the clearance of parts and improve the surface hardness of the valve stem. Contaminated dirt on the trapezoidal thread, poor lubrication conditions; deformation of the valve stem and related parts
Treatment method: remove the stolen goods, apply lubricant to the high temperature copper valve in time; correct the deformed parts.