The high-pressure ball valve uses the principle of self-tightening, which uses the tightening force of the thread to transmit to the gasket between the two planes, so that the gasket plays a sealing role. This kind of sealing effect is good, it is convenient to use and store, and it can be completely removed when disassembling. Its connection and sealing principle: when the nut is tightened, the ferrule is under pressure, so that its blade bites into the outer wall of the pipe, and the outer cone of the ferrule is tightly sealed with the conical surface of the joint under pressure, so it can reliably prevent leakage .
In order to improve the application efficiency of high-pressure ball valves and reduce the probability of failure, maintenance measures should be taken. During the use of the valve, maintenance measures should be taken throughout the entire process. Before the valve is applied, it is the key to improve the sealing performance to do the grease injection and packing of the valve.
During the fat injection operation, the fat injection pressure changes regularly. If the pressure is too low, the seal leaks or fails, and the injected grease mostly flows into the bottom of the valve cavity; if the pressure is too high, the grease injection port is blocked, the grease in the seal is hardened or the sealing ring is locked with the valve ball or valve plate. In order to prevent the fat from hardening, a cleaning fluid is used to repeatedly soften the failed sealing grease and inject new grease to replace it.
Packing is an important method to improve the sealing performance of high-pressure ball valves. If the packing fails, it will cause leakage and the valve function will fail. Especially when the fluid temperature inside the pipeline is high and corrosive, it will accelerate the aging of the packing, shorten the service life, and affect the function of the valve. Maintenance of the filler can improve the efficiency of use. During the application, if leakage occurs, the nuts on both sides of the packing gland can be tightened to prevent leakage. Don't screw it all at once to prevent the packing from losing its elastic function. As the valve is used, lubricating grease should be added regularly to ensure the sealing function.
In the process of daily application, the maintenance system of the ball valve can be formulated. Regular maintenance can improve the operating efficiency, extend the service life, and create favorable conditions for the stable operation of various equipment.