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One of the schemes, which received very widespread in practice, is to install a expansion tank on the suction plumbing pipeline centrifugal pump. In such facilities close to the centrifugal pump installed above the liquid level in the receiving tank, Monte expansion tank to which the Taco 006 pump swith suction nozzle at the bottom of the tank. Suction piping installation joins the upper part of the expansion tank. Before the first launch of a expansion tank filled with liquid. When you turn on the centrifugal pump, it starts to pump out the liquid from the tank. By lowering the level of liquid in the tank creates a expansion sufficient to lift liquid to the suction tube.
To ensure re-starts and start the installation after random failures of expansion provides for various measures to remove air from the expansion tanks. The presence of the expansion tank leads to an increase in overall dimensions and weight of the installation, and the need to remove air from the tanks complicates its installation and operation. In spite of this installation with expansion tanks were used as dewatering and dewatering of both in our country and especially abroad. In addition, they are applied in our circulating pump system Taco 007, substantially simplifying the conditions of production work on their construction, especially in wet soils.
One of the varieties of plants with a expansion tank is a device with raised pump suction pipeline, used for land reclamation Taco 007 for providing self-priming pumps. With sufficient length of suction tube can act as a distributed expansion tank, if you lay a portion of the suction pipe with a bias to the pump, and the final part of the drop in the receiver so as to form the knee.
Remaining in the intake plumbing pipeline after the pump off the liquid fills the pipeline due to bias the pump. This allows the subsequent restart to ensure the self-priming. Air from the tribe of the suction tube is removed by a pump with an ejector connected to the nozzle operating pressure pipeline pump and suction pipe - to the top of the knee suction pipe. Gas-liquid mixture from the ejector is discharged into the receiving tank Taco 007 pump.
One of the most effective measures to ensure self-priming pumps, is the establishment of circulation systems with paddle and hydro-jet pumps. Such plants are widely used in dewatering and dewatering in construction.
In addition to issues of self-priming Taco 007 in some cases, there is the problem of increasing the permissible expansion suction Taco 007 pump. This problem is most acute for pumps working in hot and low-boiling liquid, when the danger of cavitation is particularly high (pumps of internal combustion, liquid propellant, nutritious, and condensate pumps of power plants, etc.). One method to increase the permitted height of suction is used as a booster hydro-jet pumps.
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