The opening and closing of the brass valve is jammed, inflexible or unable to open and close normally, or even unable to continue to open and close, mainly due to the jamming of the valve stem and other parts, mainly the jamming between the valve stem and the packing. Generally, the packing gland deflects and touches the valve stem.
Processing method: correct installation
Packing installed incorrectly or over-tightened.
Treatment method: Pre-tighten the packing and loosen the packing properly.
The valve stem bites into the packing gland.
Treatment method: replace or return for repair.
Seizing or biting between parts.
Treatment method: Properly lubricate the valve stem.
Scratches on the sealing surface of the valve, scratches on the light column of the valve stem and bites on the threaded part of the valve stem, etc. After the sealing surface is ground, there are abrasive particles embedded in the sealing surface, which are not cleaned, causing scratches on the sealing surface; after some use, the abrasive particles are washed by the medium, and the abrasive particles are discharged and stick to the sealing surface. cause chafing.
Treatment method: Reasonable selection of abrasives, the sealing surface must be cleaned after grinding.
Dirt or welding slag in the medium is not cleaned, causing scratches.
Treatment method: clean again.
The valve stem rubs against the packing gland and packing pad, and the medium containing boron in the medium will crystallize and form hard particles after leakage, and the contact surface between the packing and the valve stem will scratch the surface of the valve stem when switching.
Treatment method: correct installation, adjust the fitting clearance of parts and improve the surface hardness of the valve stem.
There are stains on the threads and poor lubrication conditions; the valve stem and related parts are deformed.
Treatment method: remove the stolen goods, apply lubricant to the high-temperature copper valve in time; correct the deformed parts.
