All-solid-state battery cars: no mileage limit, a new driving force for future travel All-solid-state battery cars use solid electrolytes to replace the liquid electrolytes in traditional lithium-ion batteries, and store and release electrical energy through the migration of lithium ions between the positive and negative electrodes. This new type of battery uses solid conductive materials, which fundamentally solves the safety hazards of liquid electrolytes.     Why is helium leak detection the "safety gatekeeper" of all-solid-state batteries?   Although all-solid-state batteries use solid electrolytes instead of flammable liquid materials, minor defects in the battery packaging process may still cause gas leakage or moisture intrusion, causing performance degradation or even safety hazards. Helium (He), as an inert gas, has extremely small molecules (only 0.26 nanometers in diameter) and can accurately detect micron-level leaks. It is the "gold standard" for detecting battery air tightness.     The automatic helium inspection machine for automotive parts developed by HCTE uses a high-precision helium mass spectrometer leak detector, which can complete the battery pack sealing test within 10 seconds with a sensitivity of up to 5×10⁻⁸ mbar·Ls. By simulating complex working conditions such as vibration and temperature changes during vehicle driving, the equipment ensures that each battery meets the IP67 protection standard before mass production, completely eliminating the risk of "a thousand-mile dam collapsed by an ant hole".     HCTE Helium Inspection Machine: The Key Driver of Mass Production of All-Solid-State Batteries The commercialization of all-solid-state batteries faces two major bottlenecks: high interface impedance and high manufacturing costs. HCTE's automated helium inspection technology is breaking through from the following dimensions: 1. Cost reduction and efficiency improvement: Traditional helium inspection relies on manual operation, which is inefficient and has a high error rate. HCTE equipment supports fully automatic assembly line integration, with a 300% increase in inspection efficiency. A single device can inspect up to 500,000 sets of batteries per year, helping automakers to quickly achieve large-scale production. 2. Extend life: By accurately locating and repairing micro-leakage points, the battery cycle life is increased by more than 20%, directly reducing users' "battery anxiety".   3. Compatible with future technologies: Whether it is a sulfide electrolyte or an oxide system, the HCTE helium inspection machine can be adapted, providing "zero compromise" quality assurance for the development of next-generation solid-state batteries.   Data speaks: How does helium leak detection rewrite the rules of the game in the industry? Safety improvement: The fire accident rate of battery packs equipped with HCTE helium detectors has decreased by 95%. Endurance optimization: After the airtightness meets the standard, the battery energy loss is reduced by 8%, and the endurance mileage has steadily exceeded 800 kilometers.   Customer case: After a leading car company adopted HCTE equipment, the battery recall rate dropped by 92%, and the annual cost savings exceeded 200 million yuan.     The future has come: In 2030, how will all-solid-state batteries change your travel? Industry forecasts show that all-solid-state batteries will occupy 30% of the new energy market in 2030, and helium leak detection technology will become the "invisible engine" of this process. As the world's leading leak detection solution provider, HCTE has reached strategic cooperation with various battery manufacturers. Its modern automatic helium detector has introduced blockchain traceability technology to "chain" the detection data of each battery and provide users with a lifetime warranty certificate.       Act now: If you are looking for the best solution for battery leakage detection, or want to learn more about the technical details of HCTE automatic helium inspection machine for automotive parts and get customized solutions, please contact our engineering team for consultation - there is no need to compromise between safety and efficiency!

In the field of automobile manufacturing, the quality and performance of automotive high-voltage relays are crucial. As a key inspection tool to ensure their sealing, the helium inspection equipment produced by HCTE provides a strong guarantee for the production and quality control of automotive high-voltage relays with many outstanding advantages.   High-precision inspection capability: HCTE's helium inspection equipment uses advanced technology and precision sensors to detect extremely small helium leaks with extremely high detection accuracy, which can reach or even exceed the industry-leading level. For automotive high-voltage relays, which have extremely high requirements for sealing, this advantage can effectively detect potential tiny leaks and ensure the reliability and safety of products under complex working conditions such as high voltage and high current, thereby avoiding relay failures caused by leakage problems and possible problems with the automotive electrical system. Efficient inspection speed: In the fast-paced environment of automobile production, efficiency is competitiveness. HCTE's helium inspection equipment has the ability to quickly detect and can complete the inspection task of automotive high-voltage relays in a short time, greatly improving production efficiency and reducing waiting time and cost consumption in the production process. This enables automakers to produce more high-quality relays within a limited time, better meet market demand, and enhance the economic benefits and market competitiveness of enterprises.     Wide compatibility and adaptability: Automotive high-voltage relays come in a variety of types, specifications and sizes. HCTE's helium inspection equipment fully takes this into account and has strong compatibility and adaptability. Through simple parameter adjustment and tooling replacement, the equipment can easily cope with the inspection needs of different types of relays, without the need to configure inspection equipment separately for each relay, saving a lot of equipment procurement costs and equipment floor space for enterprises, and improving the utilization rate of production resources. Highly intelligent and automated: The equipment is equipped with an advanced intelligent control system and a user-friendly automated operation interface, realizing a fully automated process from relay loading, inspection to data recording and result judgment. Operators only need to perform simple settings and monitoring to complete the entire inspection process, which not only reduces labor intensity, but also reduces the impact of human factors on the inspection results, and improves the consistency and accuracy of the inspection results. In addition, the equipment also has the functions of automatic data storage, query and analysis, which facilitates enterprises to trace and manage production data and provide strong support for quality improvement.     Stable and reliable performance: The equipment on the automobile production line needs to run stably for a long time, and HCTE's helium inspection equipment performs well in this regard. It uses high-quality components and advanced manufacturing processes to ensure that the equipment has stable and reliable performance during long-term continuous operation and is not prone to failure. Even in harsh production environments, such as high temperature and high humidity, the equipment can still maintain a good working condition, providing stable and reliable detection guarantees for the quality control of automotive high-voltage relays, and reducing production delays and quality risks caused by equipment failures. Easy to operate: HCTE is well aware of the importance of user experience, so it fully considers the ease of operation in the design of the equipment. The operating interface of its helium inspection equipment is simple and intuitive, easy to understand and operate, and can be used without complex training by professional technicians. For automobile manufacturers, this can quickly put the equipment into production, reduce personnel training costs and time costs, and improve production efficiency. Powerful fault diagnosis function: In order to help companies solve problems encountered in the production process in a timely manner, HCTE's helium inspection equipment also has a powerful fault diagnosis function. When the equipment detects an abnormal situation or a leakage problem in the relay, it can accurately locate the fault point and provide detailed fault information and solutions to help maintenance personnel quickly repair the problem, reduce equipment downtime, and improve production continuity and stability. Safety and environmental protection characteristics: While focusing on production efficiency and product quality, HCTE also attaches great importance to the safety and environmental protection performance of the equipment. Helium, as a detection medium, has the characteristics of non-toxic, odorless, and non-flammable, and is relatively safe for operators and the environment during use. In addition, the equipment is designed with a sealed structure and safety protection device to effectively prevent helium leakage from polluting the environment, while also ensuring the health of the operator, which meets the requirements of modern automobile manufacturers for safe production and environmental protection. The automotive high-voltage relay helium detection equipment produced by HCTE plays an important role in the production and detection of automotive high-voltage relays with its many advantages such as high precision, high efficiency, high compatibility, high degree of intelligent automation, stable and reliable performance, simple operation, strong fault diagnosis ability, and safety and environmental protection. It provides high-quality and reliable detection solutions for automobile manufacturers and helps the high-quality development of the automotive industry.

Discover the Charm of Pet Tags with RFH's Stainless Steel Marking Technology   When you encounter the term "stainless steel graphic marking," it might sound unfamiliar to many. However, its practical application, specifically in the form of "stainless steel tags," is widely recognized. Among these, pet tags stand out as a beloved choice for pet owners.     Pet tags are small, stainless steel plaques designed to be worn by pets, customarily engraved with essential information such as the pet's name, the owner's contact details, or even a cherished pet photo. With RFH's innovative laser marking technology, you can now turn your creative ideas into reality by customizing a unique pet tag for your furry friend.   One of the most significant advantages of utilizing RFH's D9-355 UV laser for stainless steel graphic marking is its impeccable preservation of the steel's original texture and luster. The UV laser is specifically designed to avoid damaging the stainless steel surface, ensuring that your pet tag maintains its pristine condition without undergoing any chemical reactions or physical changes.     Furthermore, the use of RFH’s UV laser marking process does not require any additional materials or coatings, making it an eco-friendly solution that does not contribute to pollution or waste. This environmentally conscious approach aligns perfectly with modern sustainability ideals.   The permanency of the markings produced by RFH's UV laser is another remarkable feature. Unlike traditional printing methods, our laser marking is resistant to fading, deformation, or peeling due to the effects of time, temperature, humidity, or friction. This durability guarantees that your pet's tag will remain just as vibrant as the day it was created.   Efficiency is yet another benefit to consider. With RFH's UV laser technology, a single design or text can be marked in a matter of seconds, offering a rapid turnaround time that is especially beneficial for businesses and pet owners alike.   Finally, when compared to other conventional printing methods, the precision achieved with RFH's UV laser marking is unparalleled. It can effortlessly engrave intricate and clear patterns or text, ensuring that each pet tag is not only functional but also a reflection of the pet's personality.   In conclusion, RFH's stainless steel graphic marking technology provides an excellent opportunity for pet owners to create personalized, durable, and eco-friendly pet tags. Embrace this innovation and craft a tag that your pet will wear proudly and that you will cherish for years to come.  

Introducing the RFH Expert III 355   —Precision Engineering for Medical Applications   In the world of high-precision machining, the RFH Expert III 355 stands out as a meticulously crafted instrument specifically designed to meet the rigorous demands of the industry. This innovative product is set to redefine standards with its exceptional beam quality and unparalleled stability, making it the ideal solution for the intricate processing requirements of medical tubing surfaces.   At RFH, we firmly believe that "striving for perfection and pursuing excellence" is not just a motto; it embodies our commitment to delivering the highest quality products. In the high-stakes field of medical device manufacturing, we understand that product quality is paramount — it is, quite literally, a lifeline. This profound responsibility drives our relentless pursuit of innovation, as we strive to push the boundaries of laser technology in the medical domain.   The RFH Expert III 355 not only enhances manufacturing efficiency but also ensures that medical devices are crafted to the highest precision standards. With its cutting-edge features and robust performance capabilities, this tool is poised to set a new benchmark for the industry, fostering advancements that will ultimately improve patient outcomes. As we continue to innovate and refine our offerings, our commitment to quality and excellence remains unwavering. The RFH Expert III 355 is a testament to our dedication to advancing laser technology and its application within the medical field, ensuring that we not only meet but exceed the expectations of our partners and clients.   In conclusion, the RFH Expert III 355 is more than just a tool; it is a reflection of our passion for precision and our determination to keep pushing the frontier of medical manufacturing technology. Join us on this journey, as we continue to pave the way for remarkable advancements in medical device production.

The Intersection of Film Technology and UV Laser Cutting     In recent years, the demand for precision cutting in various industries has grown significantly, particularly for applications involving films in fields such as electronics, optics, medical devices, digital products, and packaging. Traditional cutting methods—mechanical, thermal, and chemical—have their limitations when it comes to achieving the high degree of accuracy and delicacy required by modern applications.     Enter the RFH D9 series UV laser, a state-of-the-art watercooled UV laser cutting system. The D9 series stands out due to its compact size, high precision, excellent stability, and robust performance. Specifically, the D9-355 model is engineered to handle a multitude of cutting, printing, and engraving scenarios with remarkable ease.  The capabilities of the D9-355 in UV laser cutting bring transformative advantages to film applications. Unlike traditional methods, UV laser cutting minimizes thermal damage, ensuring that the integrity of sensitive films is preserved. This is particularly crucial in sectors where precision is paramount and even the slightest degradation can compromise the functionality of the final product. Moreover, the versatility of the D9-355 water cooled UV laser means that it can adapt to varied materials and thicknesses, making it an indispensable tool for manufacturers. Its ability to execute intricate designs with consistent quality elevates the manufacturing process, resulting in superior finished products that meet the rigorous demands of today's consumers. In conclusion, the advent of compact and high-performing UV laser cutting technologies like the RFH D9 series UV laser is revolutionizing the way films are processed across diverse industries. As we move forward, embracing such innovations will be key to maintaining competitive advantage and meeting evolving market needs.  

Enhancing Crystal Interior Engraving    RFH F9 5W UV Laser   Crystal internal carving is a remarkable craft that beautifully merges art and technology. With the RFH F9 5W UV laser, we are capable of creating stunning three-dimensional patterns within transparent crystals, resulting in unique and captivating visual effects.   One of the primary advantages of utilizing the RFH F9 UV laser is its unparalleled precision. This technology allows for **non-destructive processing**, ensuring that the integrity of the crystal is maintained throughout the carving process. Additionally, the high processing efficiency of the RFH F9 translates to faster production times, making it an ideal choice for both artists and manufacturers looking to optimize their workflow.   Moreover, the design flexibility offered by this laser is a significant benefit. The adaptability of the RFH F9 can accommodate various intricate designs, giving artists the creative freedom to explore new possibilities in crystal carving.   The RFH F9 5W UV laser stands out for its **excellent beam quality** and **stable output performance**. These features ensure consistent results, essential for high-quality production. Its flexible adjustment capabilities further enhance its usability across different projects, making it a reliable choice for diverse applications.   In summary, the RFH F9 5W UV laser is revolutionizing the field of crystal internal carving, combining precision, efficiency, and reliability. As this technology continues to advance, we can expect even more extraordinary creations that will push the boundaries of artistic expression in crystal engraving.    

The processes of cotton knitting fabric(scouring, bleaching , dyeing and etc.) is generally carried out in the overflow machine. During the entire processing, the fabric remains in a rope-like state. The fibers constantly bend and deform in the dyeing machine, the original hydrogen bonds are constantly broken while new hydrogen bonds are constantly formed. Sometimes the newly formed hydrogen bonds cannot be fully restored, thus forming chicken claw marks and dead creases on the fabric surface. In the single-sided fabric structure, tension of the two sides of yarn is asymmetric. After fabric is folded in one direction for a long time, it is difficult to recover. Therefore, among various structures,  especially on fabrics with less or larger weight (eg. plain weave and sweatshirt fabrics) are more prone to crease problems. The generation of creases is also closely related to yarn count and twist. The finer the yarn count and the higher the twist, the greater the possible reversal and untying of the yarn, and the more likely it is to cause crease problems.     The main process steps leading to creases: scouring and bleaching 1. The general dyeing and finishing process typically involves: fabric preparation → seam sealing → boiling and bleaching in the fabric dyeing machine → dyeing → soaping → color fixing → softening → fabric out from dyeing machine → dehydration → drying. It is commonly believed that creases mainly form in the dyeing machine. However, after rigorous experimental verification by our engineers, it has been found that most cotton knits actually develop creases during the boiling and bleaching stage, which are just not easily observable before dyeing.   2. Based on the years of experience of our engineers, the following types of fabric and equipments are prone to developing creases during the boiling and bleaching stage: Fabric factors: Single-sided cotton fabrics with lighter or heavier weights (e.g., weights <150g or >300g), especially cotton spandex (with elastane) fabrics.   Machine factors: Compared to L-shaped overflow fabric dyeing machine, J-shaped overflow fabric dyeing machine are more prone to creating creases due to their stronger stretching force. Air-jet fabric dyeing machine, on the other hand, are less likely to cause creases because the fabric is fully blown open by high-pressure air at the nozzles, allowing the fibers to "rest" from tension, which aids in eliminating internal stress and reducing creasing issues.   Process factors: Fabrics that have not undergone prestretching are more prone to creasing. Fixing the fabric under high temperatures can improve fiber proximity and orientation, stabilize fiber morphology and reduce likelihood of changes occurring in dyeing machine, which is beneficial for reducing creases. 350g pure cotton knitted fabric (no creases after dyeing)   140g pure cotton knitted jersey (no creases after dyeing)   Solutions of scouring and belaching creases  1. General Method: During boiling and bleaching, as well as dyeing, polyacrylamide-based lubricants are added. The primary role of this type of lubricating agent is to "reduce friction between fabrics and between fabrics and machinery," but it is difficult to resolve creases formed during boiling and bleaching.   2. Solution Proposed in This Article: To improve creases during boiling and bleaching, the following auxiliaries, processes, and operations are employed. Satisfactory results have been confirmed through applications by multiple clients.   Auxiliaries: A. Preferentially select a high-concentration and highly soluble polyacrylamide-based anti-crease agent JET (non-ionic) for use in the bath. Its role is to reduce friction between fabrics and between fabrics and machinery. B. Select new type of anti-crease softener RCE (non-ionic). Its role is to impart good softness and smoothness to the fabric itself, as well as to provide level dyeing properties.  The combined use of these two auxiliaries is the core of this method.   Process: Reduce the heating rate; the focus is on reducing the cooling rate, with an optimal range of 1.0 to 1.5°C/min.   Operations: Before entering the dyeing machine, the gray fabric should be placed in an area with high humidity in workshop to allow for sufficient moisture regain. During moisture regain, the fibers undergo some swelling, and internal stresses are partially eliminated, which is conducive to reducing creases. After the gray fabric is loosened, it should be allowed to freely pass through a J-shaped trough, while simultaneously being pressed by a press roll or stretched by rollers, which is conducive to eliminating internal stresses and reducing creases.   3.Process example Before boiling and bleaching, add refining permeant, etc., anti-wrinkle agent JET and anti-wrinkle softening agent RCE in the bath, do not heating firstly, cycle for 20 minutes after entering the cloth, so that the grey cloth is fully moistened and the auxiliary agent fully reacts with the fabric fiber. If bleaching is required, caustic soda and hydrogen peroxide can be added before heating. Reduce the rate of heating; Especially to reduce the cooling rate, generally 1.0 ~ 1.5℃/min is better; And it must be completely cooled to 50 ° C to discharge the liquid for dyeing.   Other items to prevent creases 1. In order to prevent the generation of creases, it is recommended to add polyacrylamide type lubricant - JET in the bath during dyeing, and reduce the cooling rate. 2. When dehydrating and dry cloth, open width rolling water dry cloth can be used, which not only improves the efficiency of dry cloth, but also helps to solve the problem of creasing.  3. When stacking cloth, it is recommended that the weight should not be too large and the time should not be too long, especially when the wet cloth is stored. 4. If it is cotton rack (with spandex) fabric using this solution can not completely solve the crease problem, you can consider the presetting process.    5. Generally, the slight crease can be solved by the setting machine, and the stubborn can be returned to the cylinder washing water, gradually heating up to 85 ° C, gradually cooling down to 50 ° C process test repair, or can be re-shaped by steam in the industrial drying machine, which can be repaired according to their respective equipment and crease conditions.

In the field of chemical production, the procurement of chemical centrifugal pumps is a crucial decision. When considering the purchase of chemical centrifugal pumps, many enterprises will turn their attention to small manufacturers, and there are numerous notable advantages behind this.   Ⅰ.Outstanding Cost Performance Small manufacturers possess unique advantages in their cost structure. Compared with large enterprises, their operating costs are lower, without complex hierarchical management frameworks and large-scale marketing expenses. This enables them to provide customers with more affordable chemical centrifugal pumps while ensuring a certain profit margin. For enterprises with limited budgets, purchasing from small manufacturers can effectively reduce procurement costs and achieve higher capital utilization efficiency. Moreover, small manufacturers are often more willing to negotiate prices with customers. Since the scale of orders has a relatively significant impact on them, they will actively communicate with purchasers when facing reasonable price requests, striving to reach cooperation, which makes it possible for purchasers to obtain more favorable prices.   Ⅱ.Strong Customization Capability The technological processes in chemical production are diverse, and the requirements for chemical centrifugal pumps also vary greatly. The flexibility of small manufacturers demonstrates great value in such situations. Their production arrangements are not as restricted by large-scale production as those of large manufacturers, and they can easily adjust production processes and procedures. If purchasers have requirements for special materials, unique size specifications, or specific performance parameters of centrifugal pumps, small manufacturers can respond promptly and carry out customized production. During the entire customization process, the simple internal communication chain of small manufacturers ensures the efficient and accurate transmission of information. Purchasers can directly communicate with technicians and production managers to quickly feed back changes in requirements, ensuring that the customized chemical centrifugal pumps can perfectly adapt to the production environment.   Ⅲ.Unique Professionalism Many small manufacturers focus on the specific segment of chemical centrifugal pumps.Long-term in-depth cultivation has enabled them to accumulate profound professional knowledge in technical aspects. They concentrate their limited resources on the research development and production of specific types of chemical centrifugal pumps, and their understanding and mastery of the products often exceed those of some large comprehensive enterprises. This professionalism is reflected in the control of performance details of chemical centrifugal pumps. Whether it is the flow rate, head, efficiency of the pump, or special properties such as corrosion resistance and wear resistance, they have conducted in-depth research. During the selection stage, small manufacturers can provide precise suggestions to purchasers based on their professional knowledge, helping purchasers choose the most suitable centrifugal pumps for their own chemical processes, and avoiding subsequent usage problems caused by improper selection. Ⅳ.Obvious Advantages in Delivery Time In chemical production projects, time is money. Small manufacturers have unique advantages in terms of delivery time. Due to their relatively small production scale, it is more convenient to adjust production plans. When purchasers have urgent order requirements, small manufacturers can quickly arrange production to prioritize meeting the time requirements of customers. Meanwhile, some small manufacturers will reserve a certain amount of inventory according to common market demands. For some commonly used models of chemical centrifugal pumps, purchasers can quickly pick up the goods after placing orders, greatly shortening the waiting time and facilitating the smooth progress of chemical projects.   Ⅴ.Thoughtful After-sales Service Small manufacturers are well aware of the importance of customers to their own development, so they often spare no effort in after-sales service. When customers encounter problems during the use of chemical centrifugal pumps, small manufacturers can respond quickly. They do not have cumbersome after-sales procedures, and technicians can quickly get in touch with customers to understand the problems and provide solutions. Moreover, the after-sales service of small manufacturers is more personalized. They can provide on-site installation guidance, equipment debugging, regular maintenance, and other comprehensive services according to the actual situation of customers. This thoughtful after-sales service not only can ensure the normal operation of chemical centrifugal pumps and extend the service life of equipment, but also can make purchasers feel meticulous care, laying a good foundation for long-term cooperation. In conclusion, when purchasing chemical centrifugal pumps in China, small manufacturers, with their characteristics in terms of price advantages, customization capabilities, professionalism, advantages in delivery time and after-sales service, have become a high-quality procurement option that cannot be ignored, providing strong support for the stable production and development of chemical enterprises.   Ⅵ.Manufacturer Recommendation At Anhui Changyu Pump and Valve Co., Ltd., our pumps are offered at favorable prices while maintaining excellent quality. We can customize special materials, unique size specifications or specific performance parameters of centrifugal pumps according to the specific requirements of buyers. Moreover, our company has been deeply engaged in the production of chemical centrifugal pumps for more than 20 years. This professionalism is reflected in the control of performance details of chemical centrifugal pumps. Whether it is the flow rate, head, efficiency of the pump, or special properties such as corrosion resistance and wear resistance, we have conducted in-depth research. When there is an urgent order requirement, our company can quickly arrange production to prioritize meeting the customers' time requirements. When customers encounter problems during the use of chemical centrifugal pumps, our company can respond quickly. We don't have cumbersome. 

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

(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.