Loss of operation during pump operationfluid. As a rule, this occurs at the point of joining it to the pipeline. To avoid it, it is necessary to use a gland seal pump. It is about this device will be discussed.
On modern centrifugal sediments installed various structural elements and details.
Household pumps work due to the impeller, which operates on the engine.
There is a pumping equipment where the use of a compactor is not required. These are devices containing a magnetic coupling.
The gland seal of the pump shaft is used to ensure tightness.
Gland seals on the market togetherwith devices for pumping fluid. Why are they so called? The sealant has a round shape consisting of a fibrous material. This form is made on the gland base. The fibrous material must be constantly wetted by the pumped liquid. It acts not only as a lubricant, but also as a cooling material. Therefore, the loss of fluid still can not be avoided. In one hour of work consumed up to 15 liters of water. If you do not wet the fibrous material, it will quickly burn and have to install a new one.
It is worth noting that the elements needconstant service. Replacing the packing is done without disassembling the pump and the engine. This is a significant advantage. You do not need to call a specialist. Tightening the cuffs is done independently.
Today on the market there is a wide range of packing seals.
The main types are:
In addition, the edge can be made in several versions:
The seals are also divided by the type of material for the rubber used in the cuffs.
Modern cuffs are produced together with the spring, which is needed to seal shafts of different diameters.
Compared with other seals, cuffsdiffer in flexible and plastic properties. Performance features depend on the type of sealing material. Depending on the structure, they may have diagonal weaving in the form of a heart. Their composition is also different, and may be:
Packing seals are also used.centrifugal pumps and hydraulic presses. During installation, it should be borne in mind that a certain amount of pumped liquid will be used to wet the seal.
So, the cuff that serves to pump fluid,has the appearance of braided rope. The threads are made of asbestos or cotton. Sometimes copper wire is inserted into them. The middle is made of lead. When weaving can be used from 4 threads.
Glands are installed on the suction side. However, they can be mounted in other places. The amount of packing depends on the diameter of the shaft.
Before you buy a seal, you need to consider a number of characteristics.
It is necessary to choose a stuffing box sealant, proceeding from standard sizes. Here they look at the outer and inner diameters, as well as the wall thickness.
Many users are happy with stuffing boxsealant. Using it for mounting a single-stage pump, they noticed that the seal is suitable for any shaft speed. The most popular models are silicone grease seals. They are able to withstand high temperatures. Some fibers are treated with a special liquid, which allows the use of a sealant for pumping aggressive media.
Users pay attention to the design of the seal. The cuff consists of a woven asbestos thread.
As mentioned earlier, when choosing a seal should take into account some characteristics.
To prevent large fluid leaks,use gland seals. They are performed in various versions. Of course, the loss of fluid will be, but it is small. The volume will be spent on wetting the sealing material. Many users are happy with this device. As a rule, it is placed on submersible pumps used for pumping dirty water. Their service life is quite long, and reliability is high. For a fairly small price you can purchase quality material that will last a long time.
So, we examined what the packing of centrifugal pumps are for and what types they are divided into.
