Blog

Among various centrifugal pump products, stainless steel centrifugal pumps have become the preferred equipment in multiple industries due to their excellent material properties and wide application.   I. Application scenarios of stainless steel centrifugal pumps 1. Chemical and pharmaceutical industries: used to transport corrosive media such as acid/alkaline solutions, pharmaceutical liquids, and injectable solutions. The material of stainless steel centrifugal pumps meets food hygiene standards, thereby ensuring drug purity and quality while preventing cross contamination.   2. Food and beverage processing: When transporting alcohol, juice, and dairy products, it is worth noting that stainless steel centrifugal pumps meet hygiene standards and easy-to-clean requirements.   3. Environmental protection and water treatment: Compared with ordinary carbon steel, the excellent chloride ion corrosion resistance of stainless steel centrifugal pumps makes them very suitable for chlorine-containing wastewater treatment and seawater desalination systems.   4. Industrial circulation system: The high temperature resistance and air-water prevention capabilities of stainless steel centrifugal pumps reduce maintenance downtime in cooling water flow circulation and boiler feed water applications.   II. Suitable media for stainless steel centrifugal pumps 1. Moderately corrosive liquids Typical media: dilute sulfuric acid, weak acids/bases, organic solvents (ethanol, acetone)   2. Food grade and high purity liquids Typical media: milk, juice, edible oil, pharmaceutical intermediates   3. High temperature liquids Typical media: hot water (≤105°C), hot oil, boiler feed water   4. Wastewater containing particles Typical media: mineral water, wastewater ≤1.5% solid content   III. Core advantages of stainless steel centrifugal pumps Made from 304/316 stainless steel, these stainless steel centrifugal pumps combine corrosion resistance, high temperature tolerance and hygienic compliance:   1. Corrosion resistance: The chromium in stainless steel centrifugal pumps forms a protective oxide film that resists corrosion from acid, alkali and saline solutions.   2. High temperature endurance: Suitable for culture media from -20°C to 150°C, special models can withstand short-term exposure to 200°C.   3. Hygienic safety: Smooth, non-porous surface meets food/drug hygienic standards to prevent cross contamination. 4. Energy efficiency: Stainless steel centrifugal pumps operate 10%-20% more efficiently than conventional cast iron pumps, reducing long-term costs.   IV. Usage precautions 1. Avoid highly corrosive media (e.g. hydrochloric acid > 30%, hydrofluoric acid) and molten metals. Special material treatment is required to prevent intergranular corrosion at high temperatures.   2. Observe temperature and solid content limits: Stainless steel centrifugal pump standard models operate at ≤150°C. For media with solids > 1.5%, choose wear-resistant blades or enlarged flow channels.   3. Prevent drying, perform regular cleaning, and flush immediately after transporting viscous media to avoid residual solidification.   For customized stainless steel centrifugal pump solutions or technical consultations, please contact Changyu Pump & Valve's expert team for industry success stories and professional support!  

In recent years, with the rapid development of industries such as chemical, petroleum, medicine, and new energy, the demand for fluid conveying equipment has gradually increased. The selection of chemical pumps directly affects production efficiency and safety. Different chemical pump medium characteristics (such as corrosiveness, viscosity, temperature, solid content, etc.) put forward differentiated requirements for the material, structure, and working principle of chemical pumps. This article starts with the medium of chemical pumps, and introduces in detail the types of chemical pumps corresponding to specific media.   1. Strong acid and strong alkali chemical pump medium Strong acid: concentrated sulfuric acid (concentration>80%), hydrochloric acid, nitric acid, hydrofluoric acid, mixed acid solution (such as nitric acid + hydrofluoric acid pickling solution)   Strong alkali: sodium hydroxide (caustic soda), potassium hydroxide, high temperature alkali solution (such as alkali circulation in chemical fiber industry)   Recommended pumps:   1. Fluoroplastic chemical pumps (such as IHF fluorine-lined centrifugal pumps): The chemical inertness of fluoroplastics (such as PTFE, FEP) can resist the corrosion of more than 200 chemical media.   2. Magnetic drive pump: no seal design to prevent leakage of strong acids and alkalis, suitable for flammable and explosive environments.   II. Organic solvents and volatile chemical pump media   Benzene, acetone, carbon tetrachloride, ester solvents, methanol, ethanol   Recommended pumps:   1. Canned motor pump: The integrated motor pump design ensures zero leakage and prevents solvent evaporation or explosion. Very suitable for pharmaceutical applications.   2. Stainless steel centrifugal pump (316L): Excellent corrosion resistance to low-concentration organic solvents (such as ethanol, acetone), in line with FDA food grade standards. III. High viscosity, particle-containing chemical pump media High viscosity liquids: crude oil, adhesives, paints, resins (viscosity>1000cP) Particle-containing media: mud, wastewater (solid content ≤15%), chemical sludge Recommended pumps:   1. Screw pump: The meshing screw ensures the stable flow of high viscosity liquids (such as asphalt). The specially designed gap can handle fine particles without clogging.   2. Diaphragm pump: No seal structure, strong self-priming ability, handle slurries with solid content ≤25% (such as electroplating sludge).   IV. High/Low Temperature Chemical Pump Media High temperature media: thermal oil (≤350°C), molten salt (≤500°C), high temperature steam condensate Low temperature media: liquid nitrogen (-196°C), LNG (-162°C)   Recommended pumps: 1. High temperature chemical pumps: use heat-resistant alloy steel and silicon carbide mechanical seals, with a continuous operating temperature of 350°C. Commonly used in petroleum refining (such as heavy oil hydrogenation). 2. Low temperature chemical pumps: designed for low temperature fluids such as LNG.   V. High purity and sanitary chemical pump media Electronic grade hydrofluoric acid (Fe ion <1ppm), pharmaceutical injection, food additives (such as dairy products)   Recommended pumps: 1. Sanitary stainless steel centrifugal pumps (316L electropolished): meet the sanitary standards of the pharmaceutical/food industry. 2. Ceramic pumps: smooth silica surface prevents contamination and resists most strong acids (except HF). Note: This article provides general chemical pump selection recommendations based on chemical pump media characteristics. Changyu Pump & Valve suggests that the selection of chemical pumps must also consider site conditions, operating parameters, pipeline layout and ambient temperature, not just the medium characteristics.

In industrial fluid delivery systems, chemical pump motors are the core of industrial equipment and directly determine the operating efficiency and system stability. The selection of chemical pump motors represents a complex engineering process, in which configuration decisions have a significant impact on the productivity, reliability and service life of the system. This article systematically outlines the workflow and key considerations for chemical pump motor selection.   The basic principles of chemical pump motor selection follow the following key aspects:   1. Define operating conditions and requirements Before selecting a chemical pump motor, it is necessary to fully understand the operating environment, media characteristics, pressure levels, flow rates and performance benchmarks. These parameters fundamentally determine the motor specifications and installation configuration.   Corrosive media? For corrosive fluids, corrosion-resistant materials (316L stainless steel, Hastelloy) and ceramic coatings are used for enhanced protection.   High temperature operation? For environments exceeding 120°C, H-class insulated chemical pump motors are preferred; for conditions below -20°C, antifreeze lubrication systems are implemented.   Explosion risk? Select chemical pump motors with Ex d IIC T4 certification for hazardous areas, flameproof models are recommended in Zone 1 environments.   2. Determine chemical pump motor category Evaluate chemical pump motor types (AC/DC/stepper) based on operational needs through comparative analysis of technical specifications to determine the best solution for specific working conditions.   3. Evaluate performance indicators Key parameters including rated power, speed, torque characteristics and vibration frequency need to be carefully matched to ensure smooth operation, energy saving and noise reduction while preventing mechanical overload.   4. Perform comprehensive sizing calculations Parameterize system requirements and chemical pump motor specifications (power/speed/torque) through engineering calculations, and then iteratively optimize the selection plan.   5. Verify selection results Evaluate the shortlisted chemical pump motors in multiple dimensions to verify whether they meet technical specifications (power efficiency, etc.), operational reliability, durability and environmental suitability to ensure extended service life under specified operating conditions.   In short, chemical pump motor selection is a complex system engineering challenge that requires balancing technical parameters, economic factors and operational performance. By systematically applying selection principles and rigorous calculation verification, engineers can develop chemical pump motor configuration solutions that meet both practical requirements and high technical standards.

Chinese pump manufacturers are rising at an alarming rate. Although they started later than developed countries in Europe and the United States, with the continuous development of the national economy and the maturity of computer Internet technology, China's pump industry research and development, design, and production are developing rapidly. In addition, Chinese pumps are opening up sales in the international market with "high cost performance", and have become core suppliers in the global industrial field with "technological innovation" and "advantages of the industrial chain".   Ⅰ. Unparalleled cost control capabilities of Chinese pump manufacturers 1. Labor cost advantage: The labor cost of Chinese pump companies is only 1/3 of that of European and American countries. Through additional intelligent equipment transformation, the production cost of a single pump is reduced by more than 40%.   2. Industrial belt advantage: Chinese pump manufacturers basically produce in the form of industrial belts. In Jingxian, where Anhui Changyu Pumps and Valves is located, a complete industrial chain from casting processing to assembly testing has been formed, and the supporting efficiency has been increased by 50%.   3. Large-scale production advantages: large production capacity, scale effect makes the price of products of the same specifications 30%-50% lower than that of international brands.   Ⅱ. Policy dividends boost industrial upgrading   Under China's national strategic "dual carbon" goal, high-efficiency and energy-saving pumps are included in the procurement priority list, which indirectly promotes the rapid development of Chinese pump companies and enables Chinese pump manufacturers to continuously develop and innovate to meet market procurement needs. In 1995, the China National Pump Standardization Technical Committee was formally established, and a series of design and manufacturing standards for industrial and civil pumps were published. The standardization management of product design and manufacturing, and Chinese pump manufacturers have since used the standard system to align with the international standards. More than 90% of products have passed international certifications such as CE, UL, and API, and their export compliance is leading the world.   Ⅲ. Technological innovation achieves overtaking 1: Intelligence: With the penetration of AI intelligence, the Internet of Things, and big data, Chinese chemical pump manufacturers are rapidly adopting digital technology to improve the quality of their products and services. Connecting sensors and controllers through the Internet of Things (IoT) can achieve real-time monitoring and production optimization, realize automatic diagnosis and equipment safety functions, reduce downtime, and improve asset utilization. ‌   ‌2: High efficiency‌: High-efficiency energy-saving pump equipment, nuclear main pumps, cryogenic submersible pumps, mixed-transmission booster pumps and other key equipment with high import dependence have become key investment areas in the industry. Under the government's call, Chinese chemical pump companies can significantly reduce energy consumption and improve equipment production efficiency by using energy-saving motors and inverters. New innovative materials and designs also contribute to the high efficiency of pumps. For example, the pump impeller with aerodynamic design can reduce the resistance and noise of the pump and increase the displacement. ‌   ‌3‌: New materials‌: The application of high-performance engineering plastics solves the problems of high cost and heavy weight of traditional materials such as stainless steel, alloys, and ceramics. These new materials not only improve the performance of the pump, but also reduce the production cost, with superior performance and durability.   Ⅳ. Global service network builds competitiveness   1. Localized operation system: Many Chinese pump companies choose to build factories around the world to achieve 72-hour emergency order delivery, and even set up overseas warehouses to shorten the supply time of accessories to 48 hours   2. Customized solutions. Due to strong technical support, Chinese pump manufacturers can customize and develop solutions to industrial pumping needs according to local actual working conditions, realize customized solutions, and serve global industrial enterprises more professionally   Ⅴ. Domestic substitution accelerates the penetration of high-end markets At present, the development of the global industrial pump market shows a sustained and stable trend. Industrial pump companies occupy an important position in the global market, mainly dominated by pump companies in Europe, the United States and Japan, and their technological advantages and technological leadership have not changed fundamentally. At the same time, in China, there are more than 6,000 Chinese pump manufacturing companies across the country, of which more than 1,200 are above scale. These enterprises are growing steadily, improving their market competitiveness through technological innovation and product upgrades, increasing their total exports, and gradually narrowing the gap between their technical standards and those of developed countries, thus gradually accelerating their penetration into the global high-end market.   From "cost advantage" to "technological leadership", from "domestic substitution" to "global leadership", China's pump industry is completing a gorgeous transformation from "manufacturing" to "intelligent manufacturing". Choosing Chinese pumps is not only choosing cost-effective industrial equipment, but also choosing an innovative ecosystem that is synchronized with the world's top technologies.

Magnetic pumps, also known as magnetic drive pumps, are widely used in chemical, pharmaceutical, electroplating and other industrial fields. With its "zero leakage" design, it has become a star equipment for high-risk media transportation. This article introduces the advantages and disadvantages of magnetic pumps in detail to solve customers' purchase questions!   1. Advantages of magnetic pumps 1. "Zero leakage" design The magnetic pump completely eliminates the traditional mechanical seal structure and uses a permanent magnetic coupling to achieve power transmission. Its core advantage is that it is particularly suitable for conveying highly corrosive, flammable, and explosive media.   2. Low operating cost The magnetic pump uses a permanent magnetic structure, there is no contact and friction, the power consumption is small, and the energy consumption is reduced by 20-35%. Under the premise of the working conditions, it can significantly reduce the operating cost. 3. Long service life Because the magnetic pump has no mechanical friction design, the bearing life is extended by 3-5 times, and the overall service life will be longer.   4. Excellent corrosion resistance Optional materials include: - Hastelloy C276 (resistant to 98% concentrated sulfuric acid) - Polytetrafluoroethylene lining (resistant to hydrofluoric acid) - Silicon carbide sealing surface (resistant to strong alkali)   II. Disadvantages of magnetic pumps 1. High initial investment cost. Due to the cost of accessories, the price of magnetic pumps is generally 2-3 times that of ordinary centrifugal pumps   2. Medium and temperature adaptability restrictions. Magnetic pumps should pay attention to the following on the medium: solid particle content must be less than 0.1%, viscosity must be less than 500cP, and the temperature range is -20℃～250℃ (special design can reach 350℃)   3. Low efficiency. Due to the limited size of impellers that can be used for magnetic pumps, the flow rate of magnetic pumps is usually lower than that of traditional centrifugal pumps, resulting in relatively low efficiency.   4. The magnetic pump and the motor are connected by a coupling. The coupling requires high precision in alignment. Improper alignment will cause damage to the bearing at the inlet and wear of the single-sided leakage prevention isolation sleeve.   3. Comparison table of key selection parameters The "zero leakage" advantage of magnetic pumps in terms of safety and environmental protection makes them standard equipment for modern chemical production. Although the initial investment of magnetic pumps is relatively high, the comprehensive benefits brought by magnetic pumps are still very significant through the cost analysis of the entire life cycle such as environmental protection, safety, and energy saving. It is recommended that manufacturers select pumps reasonably according to actual working conditions when purchasing.

(Practical dry goods that ordinary people can understand) Why is your chemical pump always "unsuitable"? The high-performance "centrifugal pump" bought for 150,000 yuan leaked and stopped working in less than 3 months? The repair cost was 80,000 yuan. What's the problem? Is it really the quality of the manufacturer? It's not necessarily the case. It is very likely that the problem is in the selection process. The parameters of the chemical pump and the actual working conditions are "incompatible". Choosing the wrong model of chemical pump will waste money at best and cause safety accidents at worst!     Misunderstanding 1: Only look at the flow and head, and ignore everything else       Many users often rely on experience to estimate the flow and head of chemical pumps, but if they do not fully consider the actual situation, it may affect the matching of pump performance. For example, in the case of high-viscosity liquids, the starting torque requirement is high. If the power is not adjusted in time during selection, it may cause motor overload or pump damage.     When choosing a chemical pump, you must ask these questions: - Medium composition (solid content? Corrosive? Flammable and explosive? Acid, alkali, salt, toxic and sticky, ask everything) - Working temperature (normal temperature? High temperature? Low temperature? Low temperature needs insulation, high temperature prevents cavitation) - Flow rate and head (through actual measurement or calculation with professional software, ensure that the performance curve of the pump matches the actual working conditions) - Running time (continuous operation or intermittent use?) - Installation environment (indoor? Outdoor? Explosion-proof area?)     Misunderstanding 2: Not fully considering pipeline pressure drop and other technical parameters:     Because of the mismatch of pipelines, the actual performance of chemical pumps is not as expected. In addition to the chemical pumps themselves, you should also pay attention to the length, diameter, pressure drop, etc. of the pipeline when selecting to ensure a comprehensive selection.     Misunderstanding 3: Ignoring daily maintenance costs         You will understand after doing the math:       While considering the initial investment, you also need to consider the later maintenance and operation costs of the equipment. You need to comprehensively evaluate the costs before and after, and choose a chemical pump with high cost performance.     Misunderstanding 4: Not paying attention to the details of chemical pump selection       The last thing to consider is the energy consumption requirements under environmental protection. Exceeding the energy consumption standard is not allowed in some areas, so the product must meet the latest GB 19762 energy efficiency standard. Secondly, when the chemical pump is repaired, can the manufacturer provide a 10-year spare parts supply commitment? If there is a need for transformation, can it adapt to the factory's intelligent transformation needs (such as adding sensors)? How long is the warranty period? How long is the delivery period? What should I do if the performance does not meet the standard? These questions must be confirmed with the manufacturer one by one     According to the above methods, the selection misunderstandings of chemical pumps can basically be avoided.

As the "liquid porter" in the industrial field, centrifugal pumps are responsible for more than 70% of the world's fluid transportation tasks. From waterworks to petroleum refining, this rotating machinery's impellers spin thousands of times per minute, creating astonishing industrial efficiencies. This article will disassemble the advantages and disadvantages of centrifugal pumps in plain language, and attach a practical selection parameter table and a guide to avoid pitfalls.   1. Advantages of centrifugal pumps 1. Simple structure: The centrifugal pump has only 6 main components: impeller, pump body, shaft, bearing, seal, coupling, simple structure, few failures, durable, and low manufacturing and later maintenance costs.   2. Uniform flow The flow and pressure of the centrifugal pump are stable, and the operation is smooth, which is very important for use scenarios that require stable flow output.   3. High efficiency The efficiency curve is parabolic: the best efficiency point (BEP) can reach 92%. The efficiency of the centrifugal pump is much higher than other types of pumps, which can reach more than 50%, which can save a lot of energy.   4. Wide range of applications According to the structure: single-stage/multi-stage, single-suction/double-suction According to the medium: corrosion-resistant pump, impurity pump, high-temperature pump According to the installation: vertical, horizontal, pipeline Centrifugal pumps can transport a variety of liquids such as clean water, sewage, seawater, oil and chemicals, and are widely used in municipal engineering, agricultural irrigation, industrial production, ships and other fields.   5. Stable flow and easy adjustment Centrifugal pumps can work stably in a wide flow range, and the flow can be easily adjusted by adjusting the speed, impeller diameter or changing the opening of the pump outlet valve.   2. Disadvantages of centrifugal pumps 1. Before running the centrifugal pump, the pump must be filled with liquid, because if the centrifugal pump runs dry for 5 minutes, the life of the bearing will be reduced by 80%, greatly increasing the failure rate of the centrifugal pump.   2. Centrifugal pumps are sensitive to cavitation, which causes damage to the impeller. Cavitation must be prevented during use. The required NPSHr is 3-5 times higher than that of the positive displacement pump! Anti-cavitation formula: Actual NPSHHa = atmospheric pressure (10.33m) - vaporization pressure - suction line loss - installation height Safety criteria: NPSHa ≥ NPSHr + 0.5m   3. Centrifugal pumps are sensitive to high-viscosity liquids. The higher the viscosity, the lower the efficiency and performance. They are not suitable for high-viscosity fluids and need to choose other types of pumps (such as screw pumps, gear pumps, etc.). 4. The head of a centrifugal pump is greatly affected by the flow rate. When the flow rate deviates from the design, the head will drop significantly.   III. Comparison table of centrifugal pump selection parameters Centrifugal pumps are like "panacea" in the industrial field. Their universal advantages coexist with the defects of working condition sensitivity. Therefore, detailed working condition simulation must be carried out when purchasing. For special medium transportation, the "centrifugal pump +" combination solution can be considered. It is recommended to ask the manufacturer to recommend a suitable centrifugal pump combination solution.  

As an "expert in solid medium transportation", mortar pumps are widely used in smelting, mine tailings treatment, river dredging, thermal power generation and other scenarios. Due to its wear-resistant and corrosion-resistant characteristics, mortar pumps have become the favorite of many industrial and mining manufacturers. This article dismantles the advantages and disadvantages of mortar pumps in detail to help you understand the characteristics of the equipment and avoid misunderstandings in pump selection.   1. Advantages of mortar pumps 1. High wear resistance: Mortar pumps use high wear-resistant materials in the design and material use of impellers, pump casings, and linings, and the wear resistance is several times higher than that of other pumps.   2. Large flow rate and high efficiency The flow channel width is 1.5 times that of the clean water pump with the same power. The mortar pump has a large flow rate and head, fast speed and large flow rate The maximum particle diameter comparison table can be used:   3. Excellent corrosion resistance The mortar pump can withstand a variety of corrosive media (acids, alkalis, salts) at specific temperatures and solvent concentrations, and is immersed in 80 organic solvents at 20℃ and 90℃ for 30d. There is no abnormality on the surface and the performance is stable.   4. Multi-function and strong adaptability Because of the wear resistance and corrosion resistance of the mortar pump, as well as the large flow rate and head, the mortar pump is highly functional and can transport mortars of different properties.   5. Good sealing performance: The mortar pump uses a combination of auxiliary impeller + mechanical seal to prevent leakage of mortar in the pump and ensure the stable operation of the equipment.   2. Disadvantages of mortar pump:   1. Mortar pumps have high energy consumption and consume 15-25% more electricity than clean water pumps at the same power.   2. The operation of the mortar pump is demanding and requires certain professional skills and experience. Improper operation may lead to problems such as clogging of the mortar pump and poor pumping. In serious cases, it may even damage the equipment.   3. Mortar pumps have high maintenance costs and require regular maintenance and maintenance. The replacement frequency of spare parts is also relatively high. The replacement cycle table of wearing parts is as follows:   4. The scope of application of mortar pumps is limited. Mortar pumps are only suitable for small and medium-sized construction sites and have certain requirements for power supply. If the construction site is short of electricity, it will also affect the use of mortar pumps.   3. Selection parameter table of mortar pumps Although mortar pumps have limitations such as high energy consumption and frequent maintenance, their irreplaceability under harsh working conditions is unquestionable. It is recommended that when purchasing, focus on core parameters such as the material of the flow-passing parts and the configuration of the sealing system. If necessary, the manufacturer can be asked to provide a media suitability test report.

The centrifugal pump is a core equipment widely used in the three major industries of water treatment, petrochemical industry and agricultural irrigation. Its high efficiency, energy saving and reliability make it widely used in many industries. As key equipment, centrifugal pumps are used to varying degrees in various industries, and their design and maintenance need to take actual working conditions into consideration. Therefore, in actual use, reasonable operating procedures are crucial. It can not only help users better understand and manage the operation of the equipment, but also effectively improve the service life and economic benefits of the equipment.   I: 7 major operating steps of centrifugal pump: Step 1: "5 inspections" before starting the centrifugal pump 1. Check the status of the centrifugal pump and motor to ensure that there is no obvious abnormality and meet the working conditions   2. Check whether the connection of each part is good, whether the anchor bolts are firm, and whether the lubricating oil is sufficient (the oil level needs to be kept between 1/2-2/3) ‌   3. Fill the pump, check the water level, and the pipe and pump body must be filled with water (water can be seen from the exhaust hole with the naked eye)   4. Check the valve: the inlet valve is fully open, and the outlet valve is closed to 1/4 first (to prevent overload at startup)   5. Check the instrument: Is the pressure gauge zeroed? Is the voltage normal? Is the ground wire securely connected?   Step 2: Test the feel of the gear by turning the coupling manually for 2 to 3 turns. If it is normal, it will be smooth and without jamming. If jamming and friction sound occur, stop the machine immediately for inspection.   Step 3: Press the centrifugal pump switch, press the start button and release it immediately (no more than 2 seconds). Correct steering: The centrifugal pump body vibrates little and the sound is stable (refer to the direction of the arrow on the pump body). If reversal occurs, cut off the power immediately and replace the motor wiring.   Step 4: Formal start of the centrifugal pump, slowly open the outlet valve, and control the process within 30 seconds. At the same time, observe the pressure gauge: stable in the green area (such as 0.4-0.6MPa). If the pressure fluctuates, it may be air intake. If the current exceeds the red line, you need to close the valve immediately.   Step 5: During the operation of the centrifugal pump, you must "look at three things and listen at one time". Look at the pressure: fluctuation ≤10%, look at the temperature: bearing temperature ≤75℃, look at the leakage: leakage at the machine seal is ≤3 drops per minute, and listen to the abnormal sound: humming sound is normal, metal friction sound is dangerous!   Step 6: The shutdown sequence must be correct. First close the outlet valve (to prevent water hammer impact), then press the stop button, close the pressure gauge hand valve, wait until the pump temperature drops below 80 degrees before stopping the cooling water, and finally close the inlet valve as needed (if it is out of service for a long time), and drain the inside of the pump body.   Step 7: Winter special operation, when the ambient temperature is less than 5℃: the water in the centrifugal pump should be drained in time to prevent freezing and cracking, and then low-temperature grease should be added to the bearings   II: 5 taboos during the operation of centrifugal pumps 1: No idling must not exceed 30 seconds, and the centrifugal pump body should be affixed with a "No idling" label and a dry-running protector   2: Do not use the valve to "hold pressure" to adjust the flow, which will seriously cause the motor to overload and burn out. If there is a need for adjustment, the centrifugal pump variable frequency motor or cutting impeller should be replaced   3: Pumping liquid containing particles without a filter can easily break the impeller and incur high replacement costs   4: The centrifugal pump directly pumps high-temperature liquid. During the use of the centrifugal pump, the temperature difference of ＞50℃ will explode the seal, and it is generally preheated in advance (temperature rise ≤3℃ per minute)   5: Maintenance under pressure, this illegal operation is expressly prohibited, and the correct operation should be shutdown → pressure relief → hang up → double confirmation   III. FAQ Question 1: No water after starting? - Check 1: Is the centrifugal pump filled with water? (Re-exhaust) - Check 2: Is the inlet valve blocked? (Disassemble and check) - Check 3: Is the motor reversed? (Change the line sequence)   Question 2: Sudden large vibration during operation? Possible causes: 1. Impeller blocked (stop and clean) 2. Loose anchor bolts (tighten diagonally) 3.Bearing wear (locate the abnormal sound point with a stethoscope)   Question 3: Severe water leakage at the seal? - Temporary treatment: tap the sealing gland lightly (adjust the gap) - Fundamental solution: replace the mechanical seal

In the field of industrial equipment, it is crucial to choose a reliable partner. As an industry-leading pump and valve manufacturer, Changyu Pump and Valve has won the trust of many partners with its excellent product quality, perfect service system and strong supply chain support. So, what conveniences can you enjoy as a partner of Changyu Pump and Valve? 1. High-quality products to ensure engineering stability Changyu Pump and Valve focuses on the research and development and manufacturing of high-performance pump and valve products, such as mortar(slurry) pumps, submersible pumps and other products are strictly produced in accordance with international standards to ensure high durability, high efficiency and long life to obtain CE certification, etc. You can browse our official website to learn about the products. Partners do not need to worry about product quality issues and can rest assured to apply them to various industrial engineering projects. 2. Perfect supply chain to ensure timely delivery Changyu Pump and Valve has a stable raw material supply channel and a modern production plant, which can efficiently meet order requirements. In addition, the company has set up storage centers in many locations to ensure rapid response to customer needs, shorten delivery cycles, and reduce inventory pressure. This year, it will also move to a larger new factory. If you visit, please pay attention to our dynamics. 3. Personalized customization service to meet special needs For customers with special needs, Changyu Pumps and Valves provides non-standard customization services. For example, we recently combined the suggestions of technical experts in the company to provide customers with 904L materials with higher chromium metal content than 1.4593 materials, and the price is more satisfactory, and finally successfully met customer requirements. We can also design and produce exclusive pump and valve equipment according to specific working conditions. Whether it is material, specification or function, it can be customized according to requirements to create higher business value for partners. 4. Competitive price system to enhance market advantages While ensuring product quality, Changyu Pumps and Valves optimizes production and supply chain costs, making the products have a strong cost-effectiveness in the market. Partners can win the market at a more competitive price and improve profitability. We focus on sincere and long-term cooperation. It is under the role of a complete production supply chain that we can keep costs down and make continuous progress. 5. Brand empowerment and sharing of market resources Changyu Pumps and Valves has a high brand awareness in the industry. Enterprises cooperating with the company can use its brand influence to enhance their market competitiveness. In addition, partners can learn more about high-quality products through Changyu Pumps and Valves in the Chinese market. The influence and connections built over decades will help you achieve your goals faster. Choosing Changyu Pumps and Valves means choosing a stable, efficient, and win-win cooperation model. Whether it is an engineering contractor, equipment dealer, or end user, becoming a partner of Changyu Pumps and Valves can enjoy high-quality products, strong technical support, a stable supply chain, and a full range of service guarantees. We look forward to your joining us and working with Changyu Pumps and Valves to create a better future!

In the chemical industry, there are many types of liquid chemicals, including acids, alkalis, solvents, viscous liquids and corrosive media. The physical and chemical properties of these chemicals vary greatly. Choosing the right chemical pump is the key to ensuring safe, efficient production and durable equipment. In this article, Anhui Changyu Pump and Valve Manufacturing Co., Ltd. will introduce the various types of chemical pumps and their characteristics suitable for conveying different chemicals (such as nitric acid, hydrochloric acid, sulfuric acid, strong alkali, etc.) to help companies optimize equipment selection. 1.Main classification and characteristics of chemical pumps Chemical pumps can be divided into the following categories according to their design and scope of application: Centrifugal pump Features: Suitable for liquids with low viscosity, no particles or a small amount of particles. Large flow rate and stable operation. Application: Widely used for conveying water-based chemicals, dilute acids and alkalis. Magnetic drive pump (magnetic pump) Features: No mechanical seal, completely avoid leakage, suitable for volatile, flammable or highly corrosive media. Application: Suitable for conveying strong acids (such as sulfuric acid, hydrochloric acid), strong alkalis, organic solvents, etc. Gear pump Features: Suitable for conveying high-viscosity liquids, stable flow rate and strong adaptability. Application: Used to transport high-viscosity media such as lubricating oil, polymers, resins, asphalt, etc. Diaphragm pump Features: It adopts diaphragm design, can be used for highly corrosive or particulate chemicals, and has self-priming ability. Application: Suitable for transporting complex media such as strong acids, strong alkalis, coatings, mud, etc. Screw pump Features: Suitable for transporting high-viscosity, uniform liquids, stable operation and low noise. Application: Used to transport viscous liquids, emulsions and certain special chemicals. Self-priming pump Features: It has self-priming function and is suitable for extracting media with low liquid level. Application: Used in sewage treatment, solvent transportation and other occasions.   2. Select chemical pumps according to chemical characteristics   Acidic chemicals (such as sulfuric acid, hydrochloric acid, phosphoric acid) Challenge: Acidic media are highly corrosive and have extremely high requirements for pump body materials. Recommended pump type: Magnetic pump: Use corrosion-resistant materials such as fluoroplastics and stainless steel to avoid leakage and corrosion. Diaphragm pump: The diaphragm material can be selected from Teflon (PTFE), which is resistant to strong acids. Chemical centrifugal pump: Use alloy or highly corrosion-resistant materials. Alkaline chemicals (such as sodium hydroxide, ammonia) Challenge: Strong alkaline media are corrosive to the pump body and seals, and alkali-resistant materials must be selected. Recommended pump type: Magnetic pump: alkali-resistant design to avoid contact leakage. Diaphragm pump: suitable for conveying medium and high concentration alkali liquid.   Organic solvents (such as toluene, acetone, ethanol) Challenge: Solvents are volatile and flammable, have high requirements for sealing, and have a dissolving effect. Recommended pump type: Magnetic pump: no mechanical seal, eliminate the risk of leakage. Stainless steel gear pump: used for high viscosity solvent delivery. Chemical self-priming pump: used for low liquid level solvent delivery.   High viscosity chemicals (such as resins, polymers, greases) Challenge: High viscosity, poor fluidity, ordinary pumps are prone to clogging or low efficiency. Recommended pump type: Screw pump: stable delivery of high viscosity liquids, strong adaptability. Gear pump: suitable for constant flow, high viscosity media. Medium containing solid particles (such as mud, suspension, coating) Challenge: Solid particles may cause wear or clogging of the pump body. Recommended pump type: Diaphragm pump: suitable for media with high solid content and strong wear resistance. Slurry pump: specially designed for conveying high-concentration granular media. High-temperature chemicals (such as hot oil, molten sulfur) Challenge: High temperature places high demands on the heat resistance of pump body materials and seals. Recommended pump type: High-temperature resistant centrifugal pump: made of heat-resistant alloy materials, suitable for high-temperature fluids. Gear pump: suitable for high-temperature oil transportation to avoid failures caused by thermal expansion.

Anhui Changyu Pump & Valve Co., Ltd. is located in the Pump & Valve Industrial Park of Jingxian County, Xuancheng City, Anhui Province. The fluoroplastic lined pumps produced in our park occupy about 70% of the market share in China. In recent years, they have been widely recognized by customers all over the country and overseas. The following are the main reasons why fluoroplastic lined centrifugal pumps are popular in the market: 1. Excellent corrosion resistance 1) Excellent material properties Fluoroplastics (such as PTFE, FEP, PFA) have extremely strong corrosion resistance and can withstand almost all strong acids (such as sulfuric acid, hydrochloric acid, nitric acid) and strong alkalis (such as sodium hydroxide, sodium hypochlorite, etc.), as well as a variety of organic solvents and oxidizing media. Even in high temperature or high concentration media environment, fluorine-lined materials can maintain their chemical stability to ensure that the pump body is not corroded. 2) Adapt to complex media It can effectively deal with mixed media (acid-base mixtures), strong oxidizing media (such as aqua regia, chlorine), volatile chemicals (such as mercury vapor, dichloromethane, methanol), etc., and has a wide range of applications. In the transportation of corrosive liquids, the corrosion resistance of fluorine-lined plastics is better than that of ordinary stainless steel and alloy materials, and it is an ideal choice for handling highly corrosive chemicals. 2. High cost performance and economic benefits 1) Replace expensive metal pumps Compared with pumps made of expensive materials such as titanium alloy and Hastelloy, fluoroplastic lined centrifugal pumps are cheaper but can provide similar corrosion resistance. For many small and medium-sized enterprises, fluoroplastic lined pumps are an economical and efficient solution. 2) Long life and low maintenance cost Fluorine-lined materials are not only corrosion-resistant, but also wear-resistant, which extends the service life of the pump. The pump body has a simple structure and is easy to maintain, reducing downtime and maintenance costs. 3. Advanced design and reliable performance 1) No leakage and high safety Fluoroplastic lined centrifugal pumps are usually equipped with mechanical seals or magnetic drive designs to greatly reduce the risk of leakage, such as our UHB series fluoroplastic mortar pumps from Changyu Pumps and Valves. Suitable for conveying flammable, explosive, highly toxic or corrosive liquids to ensure the safety of operators and the environment. 2) Excellent structural design Fluoroplastic-lined and pump body substrates are closely combined, which can withstand high-intensity mechanical stress and resist chemical erosion of the medium. The high-efficiency hydraulic design makes the pump run more smoothly and reduces energy consumption. 4. Wide range of application scenarios 1) Chemical industry Transports a variety of corrosive media such as strong acids, strong alkalis, and organic solvents. Applied to processes such as pickling and electroplating liquid circulation. 2) Environmental protection industry Used for acid-base adjustment and waste liquid transportation in wastewater treatment. Deal with the safe discharge of highly corrosive waste liquid. 3) Pharmaceutical industry Transports high-purity, highly corrosive chemicals to ensure the quality and safety of drug production. 4) Metallurgical industry Transports ore slurry pickling liquid and extraction liquid to solve the corrosive problem in metal processing. 5. Drivers of market demand growth 1) Promotion of environmental regulations Strict environmental regulations and special working conditions require reducing leakage and pollution, and the leakage-free characteristics of fluoroplastic lined pumps fit this trend. 2) Rapid development of the chemical industry The increasing demand for corrosion-resistant and high-efficiency pump equipment in the chemical industry has further promoted the market share of fluoroplastic lined pumps. 3) Continuous technological innovation The improvement of fluoroplastic lined materials and pump body structure has continuously improved product performance and adapted to more complex working conditions. It has extremely high compatibility with other pump parts (such as sealing, gaskets and bearings) and can be flexibly configured in the face of different transport media. Contact us: If you are looking for a fluoroplastic lined centrifugal pump suitable for your working conditions, please consult us and we will provide you with a tailor-made solution.