The professional maintenance work of
Universal Valve before welding, before production and after production plays a vital role in serving the
Globe Valve in production operations. Correct, orderly and effective maintenance will protect the Globe Valve, make the Globe Valve function normally and extend the service life of the Globe Valve. The maintenance work of the Globe Valve seems simple, but it is not. There are often neglected aspects in the work.
1. When the Globe Valve is greased, the problem of grease injection amount is often ignored.
After the grease gun is refueled, the operator selects the Globe Valve and the grease injection connection method, and then performs the grease injection operation. There are two situations: on the one hand, the amount of grease injection is small and the grease injection is insufficient, and the sealing surface accelerates wear due to lack of lubricant.
On the other hand, excessive grease injection causes waste. It is that the sealing capacity of different Universal Valve is not accurately calculated according to the type of Globe Valve. The sealing capacity can be calculated according to the size and type of the Globe Valve, and then the appropriate amount of grease can be reasonably injected.
2. When the Globe Valve is greased, the pressure problem is often ignored.
During the grease injection operation, the grease injection pressure changes regularly in peaks and valleys. The pressure is too low, the seal leaks or fails. The pressure is too high, the grease injection port is blocked, the grease in the seal hardens, or the seal ring is locked with the valve ball and valve plate.
Usually when the grease injection pressure is too low, the injected grease flows into the bottom of the valve cavity, which usually occurs in small gate valves. If the grease injection pressure is too high, on the one hand, check the grease injection nozzle. If the grease hole is blocked, replace it.
On the other hand, if the grease is hardened, use cleaning fluid to repeatedly soften the failed sealing grease and inject new grease to replace it. In addition, the seal model and seal material also affect the grease injection pressure. Different seal forms have different grease injection pressures. Generally, the grease injection pressure of hard seals is higher than that of soft seals.
