In the plastic woven valve bag production workshop, there used to be the tedious and inefficient manual bag picking - workers stared at the bags on the assembly line day after day, trying to find holes, joints or bottom sticker deviation defects from the fast-moving cloth rolls, but fatigue always led to missed inspections, and high labor costs and unstable product quality became stumbling blocks to the development of enterprises. Today, the emergence of Gachn AI visual inspection system is bringing disruptive changes to this traditional industry with its "eagle eyes and golden eyes" precision and efficiency.

 

 

Why must plastic woven valve bag companies embrace AI visual inspection?

The pain points of the traditional production model have long become an industry consensus. Raw material cloth rolls often have problems such as scratches, holes, and deviations of the warp and weft lines. Manual bag picking not only requires 4-5 workers per production line, but also is affected by emotions and fatigue, and the missed inspection rate remains high, resulting in an excessive scrap rate of finished bags. What's more difficult is that the current situation of difficulty in recruiting workers and rising labor costs year by year has put companies in a dilemma of "wanting to expand production but not being able to support workers."

 

The birth of the Gachn AI visual inspection system is precisely to solve these problems. As the core technological achievement of Gachn Jeenar this system realizes the full process intelligence from raw material detection to finished bag defect recognition through the combination of high-definition cameras and deep learning algorithms.

 

Gachn AI visual inspection system: more than "seeing", more about "understanding"

Understanding ordinary visual equipment,Gachn AI visual inspection system , has real "intelligent judgment" capabilities. It can accurately capture two types of key defects:

Raw material defects: including holes, joints, warp and weft offsets, abnormal scratches, etc. in the cloth roll, blocking the generation of waste from the source;

Bag making process defects: such as skewed corners of finished bags, no bottom stickers, bottom sticker folds, poor overlap, etc., to ensure zero defects in factory products. The "cleverness" of this system lies in its adaptive learning ability. When changing the production version, the equipment can automatically identify the inspection standards of the new specification bags without manual re-adjustment, which does not affect the normal production rhythm at all. The 0.05% rejection rate is far beyond the limit of manual inspection, making product quality stable at a new level.

 

Real benefits: money is saved and efficiency is improved

The practice of a cement valve bag enterprise in Anhui is the most convincing: after the introduction of the collection system, the number of workers on a single production line was reduced from 5 to 2, saving more than 200,000 yuan in labor costs each year; the reduction in material waste has reduced the cost of raw materials by 15%, and the scrap rate has dropped from 1% to below 0.1%, and the overall benefits have been significantly improved.

 

These achievements are derived from the four core advantages of the system:

Cost reduction: a single production line reduces 1-2 bag picking workers, and with the technology of single-side lamination and reduced overlap width, the annual cost savings can reach hundreds of thousands;

Efficiency improvement: a stable speed of 120-130 bags/minute, 7×24 hours of continuous operation, so that the production capacity can be easily increased by 30%;

Quality preservation: a scrap rate of less than 0.1% helps the company establish a "high quality" reputation in the fierce competition;

Intelligence: the one-key number change function realizes fast specification switching, and the electric control system with free upgrades within 3 years makes the equipment never outdated.

 

From detection to management: data-driven production upgrade

The value of Gachn AI visual inspection system is not limited to eliminating waste. The system automatically records all defect data, generates defect classification and proportion reports, and provides enterprises with clear quality improvement directions. For example, when the proportion of "bottom sticker offset" defects increases, managers can quickly trace back to the parameter deviation of the heat sealing process, realizing the transformation from "passive quality inspection" to "active optimization".

This digital management capability allows enterprise decision makers to gain insight into production bottlenecks through data and gradually build a "zero defect" production system. As a customer in Fujian reported: "After installing the system, we can clearly explain the distribution of defect types in each shift for the first time, and process improvement has a clear goal."

 

Choose Gachn AI visual inspection system , choose peace of mind: not only equipment, but also a long-term partner

Gachn provides customers with full life cycle protection: 1-3 days of fast installation cycle does not delay production, on-site training ensures that workers can quickly get started, and the free upgrade of the electronic control system within three years keeps the technology up to date. At present, this set of equipment has been adapted to all imported and domestic plastic woven valve bag bag making machine models, and is running stably on the production lines of customers in Anhui, Jiangxi, Fujian, Guangxi and other places. When AI visual inspection becomes the industry standard, choosing Gachn group means choosing lower costs, higher efficiency and more stable quality. In the wave of intelligent transformation of the plastic woven valve bag industry, early layout can seize the market opportunity early - after all, in the competition where quality and cost determine the outcome, the difference of 0.05% missed inspection rate may be the life and death line between enterprises.

 

How Fast Can an Air-Cooled Scroll Chiller Cool? Air-cooled scroll chillers have become a go-to choice for commercial and industrial cooling applications thanks to their compact size, low noise, and high efficiency. But when it comes to cooling speed—how fast do they really work?
The answer depends on three key factors: Unlocking Cooling Speed: How Air-Cooled Scroll Chillers Deliver Results.

1. Design Matters: Single-Stage vs. Two-Stage Cooling

Cooling speed begins with design. Air-cooled scroll chillers typically come in single-stage or two-stage configurations. Two-stage units naturally offering enhanced cooling efficiency and faster results due to better refrigerant compression dynamics.
Moreover, state-of-the-art heat exchangers and optimized refrigerant circulation systems ensure seamless operation. When designed with precision, these systems achieve quicker cooling without compromising energy efficiency, making them ideal for high-demand environments.

2. Intelligent Features for Performance Boost

Modern air-cooled scroll chillers are equipped with smart control panels for precise temperature regulation and automated operations. These features:
• Eliminate manual intervention errors
• Enhance operational accuracy
• Optimize system performance in real-time
Many units also feature self-diagnosing capabilities. These systems can detect performance issues early and make automatic adjustments or issue alerts—reducing downtime and maintaining consistently fast cooling even under varying loads.

3. Maintenance: The Overlooked Performance Driver

No matter how advanced a chiller is, routine maintenance is crucial to sustaining its cooling speed. Key maintenance tasks include:
•  Regular cleaning or replacement of filters to ensure unobstructed airflow.
•  Periodic refrigerant top-ups or replacement to maintain optimal pressure.
•  Inspection and cleaning of heat exchanger surfaces to maximize heat transfer efficiency.

A well-maintained chiller operates at peak performance, delivering fast and reliable cooling over the long term. Neglecting these tasks, however, can lead to reduced efficiency and slower response times.

Conclusion: Precision Is the Key to Cooling Speed

The cooling speed of an air-cooled scroll chiller isn’t just about compressor power—it's the result of intelligent design, smart functionality, and responsible maintenance.

For businesses aiming to enhance their cooling systems, investing in a well-designed, feature-rich chiller and maintaining it properly can unlock faster cooling, greater energy efficiency, and long-term reliability. It’s not just about staying cool—it’s about staying ahead.

While screw air compressors are widely used, their energy consumption has become a key concern. Electricity accounts for 77% of total costs, followed by maintenance (18%), and equipment investment (only 5%). Thus, optimizing energy use through waste heat recovery is critical.

1. Common Heat Recovery Methods & Applications

Waste heat from air compression can be recycled via heat exchangers to warm water or air, used for heating, process needs, or preheating boiler feedwater. Systems include oil-injected and oil-free screw compressor heat recovery, based on cooling methods:

• Cooling Methods: Air-cooled and water-cooled. Water cooling is preferred for better efficiency (higher specific heat) and lower temperatures, suited for most industrial settings.
• Heat Recovery Systems: Classified as air-cooled or water-cooled. Water-cooled systems dominate retrofits due to stable heat output and versatile hot water applications.

Advantages of Heat Recovery:

• Eco-friendly: No emissions, reduces energy waste.
• Cost-saving: Free hot water for daily use or heating.
• Enhances compressor performance: Lowers operating temperature, increases output, and extends oil life.
• Aligns with energy-saving policies, generating economic and social benefits.

2. Air-Cooled Heat Recovery Systems

These use heat exchangers to warm outdoor air for heating offices or workshops in winter (via adjustable dampers). In summer, hot air is exhausted. Simple, low-cost, and ideal for nearby heat users.

3. Water-Cooled Heat Recovery Systems

• Oil-injected Compressors: Recover heat from 80–100°C oil-air mixtures. Retrofits replace cooling towers with heat exchangers, producing hot water. Pros: Stable oil temperature, high efficiency. Cons: Prone to scale, limited auto-control.
• Oil-free Compressors: Handle 170–190°C compressed air.
o Primary Heat Exchange: Directly cools hot air for hot water. Pros: Stable air outlet temperature. Cons: Severe scaling, high maintenance.
o Secondary Heat Exchange: Adds a softened water loop to reduce scaling, improving efficiency and stability.

In the pursuit of building energy efficiency, ice thermal storage systems stand out as a transformative solution. By producing ice during off-peak nighttime hours and utilizing it for cooling during daytime peak periods, these systems significantly cut energy costs and reduce grid strain.
At the core of this technology lies a critical decision: choosing the right chiller technology—centrifugal or screw. This guide explores their differences and offers insights into making the best choice for your specific needs.

Centrifugal vs. Screw Chillers: Core Advantages

Centrifugal Chillers

Centrifugal units compress refrigerant using high-speed impellers, boasting high single-unit capacity (often >2,000 RT) and exceptional energy efficiency (IPLV ratings over 10.0). Ideal for super-large commercial projects, they maintain strong partial load performance between 40%–100%.
However, they are prone to surge effects at low loads and typically require variable frequency drives or multi-head designs, leading to higher initial costs.

Screw Chillers

Screw chillers rely on twin-rotor compression, offering a compact design, broad cooling capacity range (80–2,000 RT), and excellent load adaptability from 10% to 100%. They handle unstable grid conditions well and support modular expansion. While their COP is slightly lower than centrifugal models at full load, they come with 15–20% lower maintenance costs and better flexibility in mid-scale applications.

Scenario-Based Selection Guide

Large-Scale Complexes (>100,000㎡)

For massive developments, centrifugal chillers reduce system complexity. A data center project using three 2,000 RT centrifugal chillers achieved 30% energy cost savings, thanks to highly efficient ice production and melting cycles.

Mid-Sized Cooling Stations (50,000–100,000㎡)

In hospitals or university campuses, screw chillers offer modular control and automatic mode switching, cutting energy use by 22% annually in one case using 800 RT units.
Retrofit Projects or Historic Buildings
With limited space or height, screw chillers’ smaller footprint and lower vibration levels are ideal. A heritage building retrofit used noise-dampened screw chillers to meet a ≤65dB requirement—seamlessly integrating into the protected structure.

Lifecycle Cost Comparison (10-Year Outlook)

• Initial Investment: Centrifugal chillers cost 20–30% more, but fewer units are required at higher capacities.
• Operating Cost: Centrifugal models save 8–12% in electricity when running above 75% load.
• Maintenance Cost: Screw chillers save approx. ¥15,000 per unit annually due to simpler mechanical components.

4-Step Guide to Optimal Chiller Selection

1. Cooling Capacity:

1,500 RT → centrifugal
<800 RT → screw
In between? Analyze based on actual load curve

2. Load Fluctuation:

Daytime variations >40% → screw chillers offer superior adaptability

3. Electricity Pricing:

Off-peak/peak price ratio >3:1 → centrifugal chillers provide greater thermal storage ROI

4. Space Constraints:

Machine rooms <4m height or limited footprint → screw chillers are easier to install

Final Insights

Choosing between centrifugal and screw chillers isn’t about competition—it’s about complementing project-specific needs. With innovations like magnetic bearings and variable-speed drives, both technologies are advancing rapidly.
For dual-mode ice storage systems, optimal results require a comprehensive evaluation of cooling demand, energy pricing, space limitations, and long-term ROI. With careful planning, your chiller system can become a high-value investment that offers unmatched efficiency, reliability, and sustainability.

The chemical industry is full of corrosive and hazardous chemicals. Although these media play a key role in the relevant industries, they pose a serious challenge to pump equipment. The more corrosive the process fluid is, the greater the wear on mechanical parts, which in turn leads to more frequent maintenance, higher cost of ownership, and even potential safety hazards. Therefore, pump manufacturers must fully understand the specific characteristics of the fluids they handle to ensure that the right materials are selected for the pump.

First, it should be clear what kind of fluid is being handled

This question seems simple, but it is often overlooked in actual applications. Different fluids have very different corrosive properties (for example, the materials required to transport water are far less demanding than those required to transport hydrochloric acid).

 

Second, it is necessary to confirm whether the fluid contains solid particles

As these particles will increase the corrosion rate.

 

Third, consider the concentration of the fluid

This parameter has a significant impact on corrosiveness. Using hydrochloric acid as an example, 100% hydrochloric acid is less corrosive than 36% hydrochloric acid due to the higher reaction rate at the lower concentration.

 

The fourth and final critical factor is fluid temperature

Temperature changes can significantly alter the reaction rates in the fluid, accelerating the corrosion process. Knowing these characteristics and accurately communicating them to the manufacturer helps users obtain a canned motor pump that is suitable for their specific conditions while avoiding unnecessary material investments. Table 1 lists three examples that cover the potential range of corrosivity.

	Minimally corrosive	Corrosive	Highly corrosive
Fluid	Water	Anhydrous hydrochloric acid	Hydrochloric acid
Temperature	Normal temperature (75°F)	Normal: -14°F, Operating: 100°F	200°F
Concentration	100%	100%	36%
Solid particles	Contains	Contains	Contains

Table 1: Examples of potential corrosive ranges

 

Once the above parameters are determined, the end user can provide the information to the pump manufacturer, who can then make key material selections. The selection of wet-end components is particularly critical. The so-called "wet-end" refers to those parts that are in direct contact with the process fluid. Some wet-end components corrode at a higher rate than others, which is related to the fluid flow rate they are subjected to (for example, the impeller, as the component that transmits rotational energy to the fluid, usually has a higher flow rate than parts such as bearings or rotors). Therefore, the selection of wet-end materials is the most complex and needs to be adjusted according to the actual corrosiveness of the process fluid.

Another important decision that the pump manufacturer needs to make is the selection of "tank" material. The tank is the main pressure boundary component that contains the process fluid and must be strong enough to withstand the operating pressure while allowing the electromagnetic field to be transmitted from the stator to the rotor. The electromagnetic field is generated by the stator and drives the rotor to rotate, which is the basis for the operation of all induction motors. Therefore, nickel-chromium-molybdenum alloy (also known as C-276 alloy) has become the first choice for tank material due to its excellent strength and corrosion resistance. Although this material is critical, since most canned motor pumps are made of this material, the material selection is relatively uniform and less restrictive.

Now that we have identified the fluid information that the end user needs to provide and why it is necessary, we can analyze specific real-life application cases with the help of the three fluid situations in Table 1.

The first example is water without solid particles at room temperature (75°F)

This fluid is extremely non-corrosive and has a wide range of wet-end materials to choose from. The most common material for canned motor pumps is 304 stainless steel, which is an economical and durable metal material. Some manufacturers even recommend the use of plastic materials such as nitrile rubber or polypropylene. As mentioned earlier, the tank body is generally made of C-276 alloy, which is also the standard configuration of most canned motor pumps.

 

The second example is 100% anhydrous hydrochloric acid, which has a wide operating temperature range (-18°F~68°F)

Although hydrochloric acid itself is highly corrosive, its overall corrosiveness is relatively low due to its extremely high concentration and low temperature. Therefore, the selection of 316 stainless steel can effectively deal with the corrosion risk under this condition.

The most corrosive liquid mentioned in Table 1 is hydrochloric acid at a concentration of 37% at 200°F. This condition combines the two factors of high temperature and low concentration that aggravate corrosion, posing a great challenge to the material. For most alloys, high-temperature hydrochloric acid will not only accelerate the corrosion of the metal, but also further induce secondary corrosion of the metal by water.

Under such extreme conditions, it is difficult to find a standard metal material that can meet the corrosion protection requirements. Therefore, manufacturers often choose special materials such as armor with excellent corrosion resistance. In addition, in order to protect the motor components, a clean water flushing circulation system is also used to prevent damage to the C-276 tank and bearing materials. Although such applications require higher material costs, they are necessary investments to ensure the long-term stable operation and safety of the pump.

Material selection may seem complicated, but it is actually a key step in maximizing pump performance. For the end user, although the task seems simple, it is crucial. A deep understanding of your application requirements and full communication with the pump manufacturer are the first steps to a successful selection. If this step is not performed properly, resulting in distorted information about fluid properties, the design basis of the entire pump will be biased. As a pump manufacturer, it is necessary not only to fully understand the user's actual application environment, but also to clearly understand the interaction between these conditions and the existing materials. The key is to ensure that the selected materials can handle the most severe operating conditions while taking into account the economical design.

The primary differences between forged and cast wheels lie in the manufacturing processes, material characteristics, strength, weight, and cost. Here's a breakdown of the distinctions:

 

Forged Wheels:

1.Manufacturing Process:

Forging involves shaping metal using compressive force, typically through the use of dies and hammers.

The process aligns the grain structure of the metal, resulting in increased strength.

2.Material Characteristics:

Forged wheels are made from a solid piece of billet aluminum or other alloys.The alignment of the grain structure enhances the material's strength and reduces the likelihood of porosity.

3.Strength:

Forged wheels are generally stronger than cast wheels due to the grain structure alignment and absence of porosity. They are often used in high-performance and racing applications where strength is crucial.

4.Weight:

Forged wheels are typically lighter than cast wheels. The forging process allows for precise shaping and the removal of excess material, contributing to reduced weight. Again, it takes more metal for a cast wheel to meet the strength-to-weight ratio of a gorged wheel, so, spokes get thicker and heavier in cast wheel designs.

5.Cost:

Forged wheels are more expensive to manufacture, making them generally more expensive for consumers.

 

Cast Wheels:

1.Manufacturing Process:

Cast involves pouring molten metal into a mold and allowing it to solidify. Cast wheels are formed by filling molds with molten aluminum.

2.Material Characteristics:

Cast wheels are made from liquid metal that solidifies in the mold. The material may have slight variations in grain structure and may contain porosity.

3.Strength:

Cast wheels are generally not as strong as forged wheels due to the casting process, which may introduce porosity and other inconsistencies.

4.Weight:

Cast wheels can be heavier than forged wheels, as the casting process may not allow for as much precision in shaping and material removal.

5.Cost:

Cast wheels are more cost-effective to produce, making them a more affordable option for many consumers.

 

Conclusion:

Choosing between forged and cast wheels depends on factors such as budget, intended use, and preferences. For high-performance or racing applications where strength and weight are critical, and failure is not an option, forged wheels are the standard. Cast wheels, on the other hand, are more commonly used for everyday vehicles where actual performance is not a consideration.

 

Copycat car wheels or counterfeit car wheels have caused many tragedies.But if you are buying a large-scale forged car wheel, then don't worry about using it.In fact, in terms of strength, large-made car wheels are stronger than original car wheels, even though they are lighter.

 

As for the service life, it depends on whether you switch to a low flat ratio tire.If the tire specifications remain the same as the original factory, then just use it with confidence.Remember that the premise is to use genuine forged car wheels.However, if you switch to low-flat-ratio tires, you need to be careful. If the flat-ratio is lower than 40, don't try difficult actions such as high-speed pit punching and speed bumps.Slowing down honestly is good for tires, wheels, shock absorbers, tower tops and even the body.Lightweight automobile wheels are actually an effective means to reduce the quality of non-spring loads. This will make the bounce under the spring more neat. High speed will not be “light”, but will be more stable.The braking distance will theoretically be shortened, but I haven't tested it specifically, and I can't feel it.As for steering, it will definitely help, but it is also difficult to quantify.What is energized and can be felt is the acceleration of performance improvement.

When shopping for aftermarket wheels, you'll often hear the term "forged" used as a selling point. Many assume "forged" automatically means "stronger," but that's not always the case. Understanding the true characteristics of forged wheels can help you make a better decision for your vehicle.

What Are Forged Wheels?

Forged wheels are made from a single block of aluminum that is heated and pressed under extreme pressure into a wheel shape. This process creates a dense, grain-aligned structure, which can enhance strength and reduce weight compared to cast wheels.

Strength vs. Durability

While forged wheels are known for their high strength-to-weight ratio, "forged" doesn’t always mean "indestructible." The real advantage lies in their ability to be both lightweight and strong, making them ideal for performance vehicles. However, their hardness can sometimes make them more brittle under extreme impacts compared to some high-quality cast or flow-formed wheels.

Why Choose Forged Wheels?

a) Lightweight – Less unsprung weight improves handling and acceleration.

b) Performance-Optimized – Preferred for track use and high-speed stability.

c) Premium Finish – Often come with high-end finishes and custom designs.

"Forged" doesn't automatically mean "stronger in every way"—it means optimized for performance where weight savings and rigidity matter most. If you're looking for the best balance of strength and weight reduction, forged wheels are an excellent choice. But for everyday driving or rough roads, other manufacturing methods might offer better durability for the price.

Any interests, feel free to contact us sales09@zwwheels.com. We could provide OEM&ODM service.