In the applications of Slurry Pumps, frequency conversion operation is sometimes required. For example, direct coupling connection must be achieved at some sites, or flowrate is unstable at other sites, or the transport distance is relatively long etc.. Hence, frequency converters are needed to adjust the speed of the slurry pump so that the pump discharge pressure matches the actual required one.
In the process of frequency conversion, people often consult about the lowest frequency: someone says it’s 25Hz, some says 30Hz, and some says 5Hz. Are these parameters correct? What is the exact value? The inaccurate setting of the minimum frequency in the control system will affect the normal operation of the slurry pump.

In fact, the above three frequency values come from two aspects. One is the driving equipment of the pump, i.e. the motor and another is the slurry pump itself.
I: the minimum operating frequency of VSD motors
1. Speaking of theory alone, the lowest operating frequency that a VSD motor can run is 0Hz, but a 0HZ motor has no speed, so this cannot be regarded as the lowest operating frequency;
2. The allowable operating speed range of different VSD motors is different;
3. To put it simply, if the speed regulation range of the VSD motor is 5-50Hz, then the minimum allowable operating frequency of the variable frequency motor is 5Hz;
4. The reason why the variable frequency motor can run at multiple frequencies.
(1) The VSD motor has good heat dissipation performance. Its cooling and ventilation system are driven by independent wiring. It can be forced to dissipate heat to ensure that the VSD motor can operate at different frequencies. The motor can generate heat and dissipate in time;
(2) The insulation performance of the VSD motor is good, and it can take in the impact that has on the VSD motor, from the different current and voltage of different frequencies.
5. It is not recommended to run the variable frequency motor at low frequency. After the motor runs at low frequency for a long time, it is particularly prone to heat generation, which will cause the motor to burn out. The best operating frequency of the motor is to work close to the constant operating frequency.
6. The frequency conversion range of the commonly used frequency converter is 1-400HZ; but in practical application, considering that the standard of the Chinese  motor is planned according to the power frequency of 50HZ, the application is in fact limited within the range of 20-50HZ.
Therefore, the minimum allowable frequency of the variable-frequency motor is related to the specific operating frequency range of the variable-frequency motor. Generally, the lowest value that the VSD motor allows can be taken.
II: the minimum operating speed of slurry pumps
Each slurry pump has its own performance curve, which specifies the minimum operating speed of the pump. Only when the speed is higher than the specified speed, the pump can operate normally. The frequency at this speed is the minimum operating frequency of the slurry pump.
Of course, there are other influences such as the flow rate of pipelines. Simply put, it can be considered that the above two points, that is, the frequency determined by the minimum speed of the slurry pump and the minimum operating frequency of the variable frequency motor are the two factors that affect the minimum operating frequency of the slurry pump. Among these two factors, the highest frequency value is the minimum operating frequency of the slurry pump.

The following safety information related to pump operation and maintenance should be carefully followed and proper procedures followed to avoid personal injury and equipment damage. All statutory requirements related to this equipment must be complied with at all times.
Do not apply heat to the impeller hub or air intake to aid in impeller removal. Heating may cause impeller crushing, injury or equipment damage.
Do not run the pump at zero or very low flow for extended periods of time. Failure to follow this warning may result in overheating of the pump and evaporation of the pumped fluid, creating very high pressures. Such actions could result in serious personal injury or equipment damage.
Check drive motor rotation before installing drive belts or couplings. Incorrect motor rotation may result in personal injury or equipment damage.
Do not put very hot or very cold fluid into the pump at ambient temperature. Thermal shock can cause the wet end parts of the pump to break. Pumps must be considered rotating machinery and pressure vessels. All relevant safety precautions and procedures for this type of equipment should be followed during installation, operation and maintenance of the pump.
In the case of auxiliary equipment associated with the pump (e.g. motors, belts, drive couplings, reducers, variable speed drives, etc.) during installation, operation and maintenance, all relevant operating instructions should be consulted and recommended procedures should be followed.

The heavy duty SH(R) pump range is designed to perform continuous pumping of highly abrasive slurries. This range of pumps have been proved successful in processes from hydrocyclone feed to regrind, flotation and tailings in minerals processing plants as well as other industrial applications

If you have any questions about heavy-duty slurry pumps, you can contact us!

When it comes to industrial pumps, one name that stands tall is the China slurry pump.  As the slurry pump industry has expanded rapidly in recent years, China has emerged as a major player in manufacturing and exporting these pumps worldwide.  Made in China, these pumps have gained popularity for their excellent quality, durability, and cost-effectiveness.

China slurry pumps are known for their cutting-edge technology and innovation.  With a focus on research and development, Chinese manufacturers have adapted to the ever-changing needs and demands of the global market.  They have invested heavily in state-of-the-art manufacturing facilities and advanced machinery, enabling them to produce pumps that are not only efficient but also capable of withstanding harsh operating conditions.  No matter the industry, be it mining, construction, or dredging, China slurry pumps are designed to handle complex applications with ease.
Moreover, the phrase "Made in China" is no longer synonymous with low quality or cheap products.  Chinese manufacturers have made significant progress in enhancing the overall quality of their slurry pumps.  Adhering to strict quality control measures and international standards, these pumps are now trusted by industries worldwide.  Chinese manufacturers have been successful in establishing long-term relationships with international clients, gaining their trust through their commitment to producing reliable and high-performing products.
Another standout feature of China slurry pumps is their cost-effectiveness.  Made in China, these pumps offer great value for money without compromising on quality.  The combination of competitive pricing and high efficiency makes them an attractive choice for industries looking to optimize their operations.  As a result, China has become one of the leading exporters of slurry pumps, supplying them to various corners of the world.
In conclusion, the China slurry pump has shown its mettle in the global market.  Made in China, these pumps offer exceptional quality, durability, and cost-effectiveness.  With their cutting-edge technology, strict quality control measures, and competitive pricing, Chinese manufacturers have become reliable partners for industries worldwide.  From their inception in China to their journey all the way to international markets, China slurry pumps have established themselves as a force to be reckoned with in the industry

Horizontal slurry pump mainly includes the following series ‌ :

‌AH(R) type, L(R) type, HH type, M(R) type ‌ : These series belong to the county arm type double pump shell slurry pump, in which the finger with the letter R is lined with rubber material. Their flow parts can be made of high chromium alloy or wear resistant rubber.

‌ZJ series ‌ : This series is also a double pump housing structure, different from the AH series, it uses a central open bearing assembly. ZJ series is characterized by cutting the impeller to meet the needs of the lift, the same type of pump can have multiple sizes of the impeller, with the increase of the impeller, the lift will also increase.

ZGB series ‌ : This series of slurry pump is also double shell structure, but the flow parts do not have rubber material. It is characterized by large flow, high head, and can be multistage series.

‌G/GH series ‌ : called sand and gravel pump, is a single pump shell structure. It has wide flow channel and good cavitation performance, and is usually used in sand pumping and other working conditions.

‌DT series ‌ : called desulfurization pump, also single pump shell structure. It is mainly used for desulfurization projects, and the flow parts are generally made of A49 material, which has good corrosion resistance.

These range from county arm twin housing to single housing construction, from high wear materials to application-specific desulfurization pumps to meet the diverse needs of a wide range of industrial processes ‌