Screw pumps are widely used in water treatment plants, such as water delivery, wet sludge and flocculant liquid, because of their characteristics of variable and self absorption, strong and reversible, and capable of transporting liquids containing solid particles. The screw pump should be selected in accordance with the economic, fair and reliable standards. If we think poorly about design and selection, it will bring trouble to the future use, management and maintenance. Therefore, choose a screw pump which is reasonable and reliable according to the production practice needs not only guarantee the smooth production, but also reduce the cost of repair. Ke Yu machinery as a diaphragm metering pump manufacturers, we are using some of the grasp of the screw pump to share with you:

1. The selection of the rotating speed of the screw pump

Screw pump flow and speed into a linear relationship between the phase of screw pump about low speed and high speed screw pump could add the flow and head, but the power is increased, the high speed between the rotor and the stator wear, make sure the premature failure of screw pump, and high speed screw pump rotor the length is very short, easy to wear, so as to shorten the service life of the screw pump.

It can reduce the rotational speed through the deceleration mechanism or the stepless speed regulation mechanism, and make its speed stick to a more reasonable limit below three hundred points per minute. Compared with the high-speed running screw pump, the service life can extend several times.

2. the quality of the screw pump

At present, there are many varieties of screw pumps on the market. Relatively speaking, the screw pumps imported are of reasonable design, good quality, but the price is high, and some of them are not in service. The price of the parts is high and the order period is long, which can affect the normal operation of production. Most of the imported products produced in the sea are of different quality. When choosing products produced in the sea, when considering their performance price ratio, we choose products with low speed, long lead, excellent transmission parts and long life.

3, ensure that no sundries enter the pump body

Wet sludge mixed with the solid debris will screw pump stator rubber material damage, so to ensure that debris does not enter the pump chamber is very important, many wastewater treatment plant before the installation of a grinder pump, also some device grid installation or strainer, blocking debris into the pump, the grid should be real-time clean up so as to avoid the formation of infarction.

4. Prevent material breaking

The screw pump must not be allowed to operate, in the case of broken material is easy to get angry, the rubber stator due to dry friction, instant high temperature burn, so the grinder intact, grid dredging is one of conditions, normal operation of the screw pump and screw pump pump body installed in some - end feeding stop installation, when ignition occurs cutting, due to its characteristics of screw pump self-priming function, vacuum chamber will, vacuum installation will make screw pump stop running.

5. Insist on constant pressure of export

A screw pump is a volumetric reverse pump. When the outlet is blocked, the pressure will increase gradually so as to exceed the predetermined pressure value. At this time the motor load is added rapidly. The load of the related parts of the transmission machinery will also exceed the design value. When it is serious, the fire motor will be destroyed and the transmission part is broken. In order to prevent the damage of the screw pump, the overflow valve is installed at the outlet of the screw pump, which is used to keep the pressure of the outlet and stick to the normal operation of the pump.