Looking at the New Industry Opportunities Behind 2 Inch Slurry Pump

Shijiazhuang Minerals Equipment Co., Ltd. is one of the few authorized manufacturers of 2 inch slurry pump in the industry. The production process of the product involves critical steps demanding high human skills, allowing us to maintain the specified design quality and avoid bringing in some hidden imperfections. We introduced testing equipment and built a strong QC team to carry out several phases of tests on the product. The product is 100% qualified and 100% safe.

For CNSME PUMP, it is important to gain access to international markets through online marketing. Since inception, we have been longing for being an international brand. To achieve that, we have built our own website and always post our updated information on our social media. Many customers give their comments like 'We love your products. They are perfect in their performance and can be used for a long time'. Some customers repurchase our products several times and many of them choose to be our long-term cooperative partners.

The most comprehensive, sincere and patient service is delivered to customers through CNSME for better promoting 2 inch slurry pump and gain trust.

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Over the years, we have been dedicating to producing more environmental-friendly products. We are working on seeking recyclable or non-polluted materials that pose no negative impact on our environment.

Pump knowledge -- Minimum operating frequency of slurry pump

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.

China Slurry Pump: Quality that Goes All the Way

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

Our company will participate in the mining exhibition in Las Vegas, USA on September 24, 2024

Booth: 11559, West Hall, Las Vegas Convention Center

As The "heart" Of The Slurry Pump, The Maintenance Of The Impeller Is Particularly Important.

As the \"heart\" of the slurry pump, the impeller is an important part of the pump product, and its main function is to convert energy.When the motor drives the impeller to rotate, the blades in the impeller apply force to the fluid, forcing the fluid to rotate, thereby increasing the pressure potential and kinetic energy of the fluid.This process is the fundamental reason why the slurry pump can deliver liquid.When manufacturing impellers, the impeller can be a cast integral impeller or a fully welded integral impeller according to different application requirements.Due to its high strength and wear resistance, the welding impeller can better adapt to the impact and wear generated during the slurry pump transportation process.The overall impeller design also helps improve pump efficiency, reduce energy consumption and maintenance costs. Generally speaking, the hydraulic performance of the impeller is the decisive factor in the hydraulic performance of the pump. The main reason for pump failure is mainly caused by severe wear of the runner components, and the wear failure of the impeller is relatively common.It is very important for wear and failure analysis. Correct analysis is like finding the root cause of the problem. Therefore, failure analysis of impeller is very important.There are two main reasons for its failure: corrosion wear and abrasive wear.If the material is hit by small and loose moving particles, its surface will be damaged, which is corrosion wear.Generally, the particles should be less than 1mm and the impact speed should not exceed 55om/s.Once the particles exceed this range, it is easy to cause material damage.Abrasive wear refers to the damage to material caused by hard particles or hard concave convexity on the grinding surface during friction.It can be said that this form of slurry pump wear is relatively simple as it does not involve too much or even lubrication and adhesion issues.A failure of the impeller of the slurry pump will cause the equipment to be blocked and even stop running.Therefore, it is necessary to pay attention to the normal use and maintenance of the impeller and conduct corresponding inspections regularly to ensure the smooth operation of the impeller. Maintaining the slurry pump requires frequent inspection of the impeller condition, especially when there is a phenomenon of rapidity and slowness during use, the power should be cut off immediately and checked and maintained.It is also important to maintain proper clearance between the impeller and the guard plate or pump housing, as incorrect clearance can cause liquid leakage in the pump, affecting the performance of the impeller.

Commissioning of Slurry pumps

About Slurry pump test run:

The pump-engine unit can be tested right after it is installed and adjusted. Users with conditions should first test run the pump with clean water, and after a while of normal operation, transport mixture of water and solids.

1.1. Start

1) Open the shaft seal water and adjust the pressure to the specified value;

2) Fully open the inlet valve;

3) Open the water injection valve to inject water into the pump. (Backflow pump does not need water injection);

4) Adjust the outlet valve opening to 1/4;

5) Start the pump-engine unit. After the speed is normal, open the outlet pressure gauge. If the pressure is normal and stable, slowly open the outlet valve till it is fully opened or meets the working conditions.

Note: Starting the pump with the outlet valve fully open will cause motor overload; using a small inlet valve to control the flow will cause pump cavitation, both of which should be avoided.

1.2. Operation

After normal operation, the following items should be observed:

Whether the flow rate and head (inlet and outlet pressure) of the pump are stable and meet the process requirements; whether the current is stable; whether the unit has abnormal sounds and whether the noise is too loud; whether the shaft seal leakage is normal (drip seepage);

Mechanical seal size ≤ 50mm, leakage ≤ 3ml/h. Mechanical seal size > 50mm, leakage ≤ 5ml/h. Bearing temperature rise 35°C, the maximum temperature shall not exceed 75°C;

Vibration value should be kept within the specified range.

1.3. Stop the pump

① Before stopping the pump, pump clean water for 30 minutes to clean the medium inside the pump and pipe.

② Close the pump outlet valve.

③ Shut down and close the corresponding shaft seal water and cooling water.

④ Close the pump inlet valve.

Note: It is never allowed to stop the pump when the outlet valve is fully open, otherwise it is easy to form water hammer, causing damage to the pump or pipe fittings.

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