Standard Progressive Cavity Pump

The standard progressive cavity pump has no coupling, the prime mover bears the axial force of the progressive cavity pump, and connects the drive end and the pump end flange into a whole.

Its structure is compact and the pump type is short. Low investment, use and maintenance costs.

It is not only suitable for conveying low viscosity media such as water, but also especially suitable for conveying suspensions containing solid particles or short fibers, as well as very high viscosity media.

Main application industries: material transportation in chemical, sewage, papermaking and other industries;

The standard progressive cavity pump adopts the direct-connection structure without coupling, the pump body is compact, the space is small, and it is suitable for working conditions with limited space.The installation method of the geared motor can be rotated by a backpack-type pulley, and the motor can be vertically pumped upward to save space.

According to different working conditions, the rotor material of the pump can be made of alloy steel or stainless steel, and the surface of the rotor is sprayed with hard chromium or carbide. The stator material can be selected from nitrile rubber, EPDM rubber, natural rubber, hydrogenated nitrile rubber and other materials. Meanwhile, we can provide highly cost-effective hollow rotor pumps and constant wall thickness stator pumps.

Application of progressive cavity pump in sewage treatment industry: conveying sewage, sludge, adding chemicals, drying mud after dehydration, etc.

Compared with the centrifugal pump, the single screwpump does not need to install valves. It own can forma closed cavity to prevent backflow buffer, and the flow is stable and linear, without large fluctuations.

Compared with the plunger pump, the single screw pump has a better self-priming capacity. According to the size of the pump, it can suck up to a height of about 8 meters of water column.

Compared with the diaphragm pump,the single screw pump can transport a variety of mixed impurities, and realize the mixed transport of gas,liquid and solid, and can alsotransport the medium containing solid particles or fibers and a variety of chemical corrosive substances.

Compared with gear pump and rotor pump, single screew pump can transport high viscosity material containing fillers with poor fluidity mobility, and transport accuracy is relatively high.

Different from plunger pump, rotor pump, diaphragm pulmp and gear pump, single screw pump can be used for pharmaceutical filling and metering, and its metering accuracy is far higher than other pumps.

progressive cavity pump has the advantages of simple structure, safe and reliable operation, convenient use and maintenance, continuous and uniform liquid discharge, stable pressure, variable amount of conveying, strong self-priming ability, reversible, and can convey liquid containing solid particles. It is widely used in conveying water, wet sludge and flocculant liquid.

When selecting a progressive cavity pump, the principles of economy, rationality and reliability should be followed. If it is not suitable in terms of design and selection, it will bring a lot of trouble to future use, management and maintenance. Therefore, choosing a reasonable and reliable progressive cavity pump according to the actual needs of production can not only ensure smooth production, but also reduce repair costs.

Selection of rotation speed of progressive cavity pump

The flow rate of progressive cavity pump has a linear relationship with the rotational speed. Compared with the low-speed progressive cavity pump, the high-speed progressive cavity pump can increase the flow and head, but the power increases significantly. The high speed accelerates the wear between the rotor and the stator, which must be The progressive cavity pump will fail prematurely, and the length of the stator and rotor of the high-speed progressive cavity pump is very short, which is easy to wear, thus shortening the service life of the progressive cavity pump.

The speed is reduced by the deceleration mechanism or the stepless speed regulating mechanism to keep the speed within a reasonable range of less than 300 rpm. Compared with the high-speed progressive cavity pump, the service life can be extended several times.

The quality of progressive cavity pump

There are many types of progressive cavity pumps on the market. Relatively speaking, well-known brands of progressive cavity pumps have reasonable design and excellent materials, such as SEEPEX progressive cavity pump, but the price is high, the price of accessories is high, and the order cycle is long, which may affect production. normal operation.

The quality of the products of small brands varies. When considering their cost-effectiveness, brand products with low speed, long lead, good quality transmission components and long rated life should be selected. For example, the keepump brand that is used more in the industry.

Ensure that sundries do not enter the pump body

The solid debris mixed in the wet sludge will damage the rubber stator of the single- progressive cavity pump, so it is very important to ensure that the debris does not enter the cavity of the pump. Many sewage plants install a pulverizer before the pump, and some Install a grille device or filter screen to prevent debris from entering the single- progressive cavity pump, and the grille should be removed in time to avoid blockage.

Avoid material breakage

progressive cavity pump is never allowed to run under the condition of material failure. Once it occurs, the rubber stator will be burnt out due to dry friction and high temperature instantaneously. Therefore, the pulverizer is in good condition and the grille is unblocked. It is one of the necessary conditions for the normal operation of the progressive cavity pump. For this reason, some single- progressive cavity pumps are also equipped with dry running protectors on the pump body, and the system will alarm when the material is cut off.

Maintain a constant outlet pressure

progressive cavity pump is a positive displacement rotary pump. When the outlet end is blocked, the pressure will gradually increase, so that it exceeds the predetermined pressure value. At this time, the motor load increases sharply. The load of the relevant parts of the transmission machinery will also exceed the design value, and in severe cases, the motor will be burned and the transmission parts will be broken. In order to avoid damage to the progressive cavity pump, a bypass overflow valve is generally installed at the outlet of progressive cavity pump to stabilize the outlet pressure and maintain the normal operation of the pump.

Correct selection of dosing progressive cavity pump is the key to obtain the ideal effect of the product. In order to meet the operating requirements of different physical and chemical properties of the medium.

We suggest: the user proposes the pump operation data, which will be recommended by our company's professionals, and then confirmed by the user.

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