The opening and closing of the brass valve is blocked, inflexible or cannot be opened and closed normally, or even cannot be opened and closed continuously, 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 is deflected and then touches the valve stem. The treatment method is to install it correctly; the packing is not installed correctly or is pressed too tightly. The treatment method is to pre-tighten the packing and loosen the packing properly; The treatment method is replacement or repair; if the parts are bitten or bitten, the treatment method is to properly lubricate the valve stem; the valve sealing surface is scratched, the light column part of the valve stem is bitten and scratched, and the threaded part of the valve stem is bitten. After the sealing surface is ground, there are abrasive particles embedded in the sealing surface, which are not cleaned up, causing the sealing surface to be scratched. cause abrasions. The treatment method is to use abrasives reasonably, and the sealing surface must be cleaned after grinding. The dirt or welding slag in the medium has not been cleaned up, causing scratches. The treatment method is to clean it again; the valve stem is rubbed with the packing press sleeve and the packing pad. Secondly, the medium containing boron will crystallize and form a hard material after leakage. Particles, when the filler contacts the surface of the valve stem, the surface of the valve stem is pulled when switching. The treatment method is to install it correctly, adjust the fitting clearance of parts and improve the surface hardness of the valve stem. The trapezoidal thread is contaminated with dirt, and the lubrication conditions are poor; the valve stem and related parts are deformed, and the treatment method is to remove the dirt, apply lubricant to the high-temperature brass valve in time, and correct the deformed parts.
