Publish Time: 2023-01-12 Origin: Site
The opening and closing part of the Globe Valve is a plug-shaped valve disc, the sealing surface is flat or sea-cone, and the valve disc moves linearly along the centerline of the valve seat. The movement form of the valve stem also has a lifting and rotating rod type, which can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Thus, this type of cut-off valve is veritably suitable for cutting or regulating, and throttling. Because the opening or ending stroke of the stopcock stem of this type of stopcock is fairly short, and it has a veritably dependable cut-off function, and because the change of the stopcock seat opening is commensurable to the stroke of the stopcock slice, its veritably suitable for inflow adaptation. Next, let's take a look at the conservation of Globe Valve.
Here is the content list:
What are the maintenance items of Globe Valve?
What are some of the overlooked aspects of Globe Valve's maintenance efforts?
For Globe Valve in operation, all valve parts should be complete and intact. The bolts on the flange and the bracket are indispensable, the threads should be intact and no loosening is allowed. If the fastening nut on the handwheel is found to be loose, it should be tightened in time to avoid abrasion of the joint or loss of the handwheel and nameplate. If the Globe Valve's hand wheel is lost, it is not allowed to replace with an adjustable wrench, and it should be completed in time. The packing gland is not allowed to be skewed or have no pre-tightening gap. For the stop valve in an environment that is easily contaminated by rain, snow, dust, sand, and other dirt, the valve stem should be equipped with a protective cover. The scale on the Globe Valve shall remain intact, accurate, and clear. Globe Valve's lead seals, caps, pneumatic accessories, etc. should be complete and intact. Hitting, standing on, or supporting heavy objects is not permitted on a Globe Valve in operation. Especially for non-metallic valves and cast iron valves, it is even more forbidden to perform maintenance work during valve grease injection. Professional maintenance of valves before welding and before production and after production plays a vital role in serving valves in production and operation. Correct orderly and effective maintenance will protect the valve, keep it functioning properly and prolong its life.
1. When a Forged Steel Globe Valve injects grease, the amount of grease injected is often ignored. After grease injection and refueling, the operator selects the valve and the connection method of grease injection and then performs the grease injection operation. There are two situations, on the one hand, the quantum of grease fitted is inadequate, and the sealing face wears briskly due to a lack of lubricant. On the other hand, inordinate fat injection causes waste. The reason is that there's no accurate computation of different Globe Valve sealing capacities according to the stopcock type order.
2. When cast iron Globe Valve injects fat, the pressure problem is frequently ignored. During the grease injection operation, the grease injection pressure regularly changes in peaks and denes. The pressure is too low, the seal leaks or fails, the pressure is too high, the grease injection harborage is blocked, the grease in the seal is hardened, or the seal ring is locked with the stopcock ball and stopcock plate.
Generally, when the grease injection pressure is too low, the utmost of the fitted grease flows into the bottom of the stopcock depression, which generally occurs in small gate valves. However, check the grease snoot on the one hand, and replace it if the grease hole is blocked, or if the grease injection pressure is too high. On the other hand, it's grease hardening. drawing fluid should be used to constantly soften the invalid sealing grease and replace it with new grease. In addition, the seal type and seal material also affect the grease injection pressure. Different seal types have different grease injection pressures. Generally, the grease injection pressure of hard seals is more advanced than that of soft seals. The ball stopcock is generally in the open state during conservation, and it's named to be closed for conservation under special circumstances. Other faucets cannot be regarded as open positions. Globe Valve must be closed during conservation to insure that the grease fills the sealing groove along the sealing ring. However, the sealing grease will directly fall into the inflow channel or stopcock depression, performing in waste, if it's opened.
3. After installation, Globe Valve should be inspected regularly, the main inspection items:
(1) Globe Valve sealing surface wear.
(2) The trapezoidal thread wear and tear of the stem and stem nut.
(3) Whether the packing is outdated or invalid, and if it is damaged, it should be replaced in time.
(4) After the Globe Check Valve is overhauled and assembled, the sealing performance test should be carried out.
Times of accumulated experience in R&D and product will give you further product services and specialized support! For more questions about Globe Valve, welcome to consult us, our official website is https://www.luomaivalve.com/.