How to maintain the valve and maintenance valve daily maintenance methods

1, the valve should be stored in a dry and ventilated room, both ends of the pathway must be blocked.

2, long-term storage of valves should be regularly inspected, remove dirt, and rust-proof oil on the processing surface.

3, after installation, should be regularly inspected, the main inspection items.

(1) Seal surface wear.

(2) The wear of the trapezoidal thread of the stem and stem nut.

(3) Whether the packing is out of date and failed, if there is damage, it should be replaced in time.

(4) Hongfeng valve repair and assembly, sealing performance test should be carried out.

Maintenance work when the valve is greased

In the welding before production and after the production of the valve professional maintenance work for the valve service in the production operation plays a vital role, correct and orderly and effective maintenance will protect the valve, so that the valve normal function and extend the service life of the valve. Valve maintenance work may seem simple, but it is not. There are often neglected aspects of the work.

Firstly, when the valve is greased, the problem of the amount of grease is often ignored. After the grease gun is refuelled, the operator selects the valve and the grease linkage and then carries out the grease filling operation. There are two situations: on the one hand, the amount of grease injection is not enough, and the sealing surface will be worn faster due to the lack of lubricant. On the other hand, too much grease is injected, resulting in waste. The problem is that there is no precise calculation of the sealing capacity of the different valves according to the type of valve. The sealing capacity can be calculated by the valve size and category, and then the appropriate amount of grease can be injected reasonably.

Secondly, the pressure issue is often ignored when greasing valves. During the grease injection operation, the pressure of grease injection changes regularly in peaks and valleys. If the pressure is too low, the seal will leak or fail. If the pressure is too high, the grease injection port will be blocked, the grease inside the seal will harden or the seal and the valve ball and the valve plate will die. Usually when the grease injection pressure is too low, the grease injected will flow into the bottom of the valve cavity, which usually happens 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, identify the situation and replace it; on the other hand, if the grease is hardened, use the cleaning solution to soften the failed seal grease repeatedly and inject new grease to replace it. In addition, the seal type and seal material also affect the grease injection pressure, different seal forms have different grease injection pressure, generally the hard seal grease injection pressure is higher than the soft seal.