Why Ups Systems Still Stick to Using Lead-Acid Batteries?

In recent years, the sudden rise of lithium batteries has had a strong impact on the lead-acid battery industry. However, there are still some industries that insist on using lead-acid batteries like ups systems Why? This blog will take you to understand why people in UPS industry still choose lead-acid batteries when lithium batteries taking up many more of the markets.

Ups System Batteries

UPS systems still stick to using lead-acid batteries for several reasons:

 

Cost-effectiveness

Lead-acid batteries are relatively inexpensive compared to newer technologies like lithium-ion. They offer a favorable cost-to-energy ratio over their lifespan, making them an economical choice for large-scale applications.

 

Proven Reliability

Lead-acid batteries have a long history of use in power backup applications, with a proven track record of reliability. They can provide consistent, stable power, which is crucial for UPS systems.

 

High Energy Output

These batteries are capable of delivering high currents for short periods, making them ideal for UPS systems that need to provide power immediately when an outage occurs.

 

Widespread Availability

Lead-acid batteries are readily available and have a well-established supply chain. This makes them easy to source and replace, minimizing downtime in case of battery failure.

 

Low Self-discharge Rate

Lead-acid batteries have a low self-discharge rate, meaning they can retain their charge for longer periods when not in use. This is important for UPS systems, where the battery may only be used occasionally but needs to be ready at a moment’s notice.

 

Scalability

Lead-acid batteries are highly scalable, allowing UPS systems to be customized according to the needs of the application. They can be configured to meet varying power requirements, making them a flexible solution for diverse applications.

 

Temperature Tolerance

Lead-acid batteries have a wide operating temperature range, making them suitable for use in various environments, including those with extreme temperatures.

 

Maintenance-free Options

Valve-regulated lead-acid (VRLA) batteries, which are the most common type used in modern UPS systems, are sealed and require minimal maintenance.

 

While lithium-ion battery technologies continue to advance and offer certain advantages such as higher energy density and lighter weight, lead-acid batteries remain a reliable and cost-effective choice for UPS systems, particularly for applications that prioritize long-term reliability and cost-efficiency.

 

Ups System Battery 12V7Ah

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A Beginner's Guide to Lifting Slings Types, Materials, Specifications, and Applications

Lifting slings are essential tools in material handling, construction, logistics, and industrial applications. Whether you're lifting heavy machinery, securing cargo, or managing loads in a warehouse, choosing the right lifting sling can significantly impact safety, efficiency, and durability. This guide introduces the fundamental aspects of lifting slings, including their types, materials, specifications, and common applications.

 

1. Types of Lifting Slings

Lifting slings come in various designs, each suited for different lifting needs. The most common types include:

 

a. Webbing Slings

Webbing slings are made from polyester or nylon fabric, offering flexibility and lightweight handling. These slings are ideal for lifting delicate or finished surfaces since they do not damage the load.

  • Pros: Soft, lightweight, flexible, and corrosion-resistant.

  • Cons: Less durable against sharp edges and high temperatures.

  • Common Uses: Lifting machinery, construction materials, and cargo handling.

 

b. Round Slings

Round slings consist of multiple strands of polyester or nylon yarn enclosed in a protective fabric sleeve. These slings distribute weight evenly and provide a secure grip on loads.

  • Pros: High strength, lightweight, and flexible.

  • Cons: Susceptible to cuts if not protected properly.

  • Common Uses: Heavy machinery lifting, marine applications, and industrial settings.

 

c. Chain Slings

Chain slings are made from high-strength alloy steel chains, offering maximum durability and resistance to harsh environments. These slings are best for lifting extremely heavy loads.

  • Pros: Heat-resistant, durable, and suitable for rugged use.

  • Cons: Heavy and prone to corrosion if not properly maintained.

  • Common Uses: Foundries, shipyards, and construction sites.

 

d. Wire Rope Slings

Wire rope slings are made from strands of steel wire twisted into a robust rope, providing excellent strength and durability. These slings are widely used in industrial and marine applications.

  • Pros: High tensile strength and resistant to abrasion.

  • Cons: Less flexible than webbing or round slings.

  • Common Uses: Heavy lifting in construction, offshore industries, and cranes.

 

e. Metal Mesh Slings

Metal mesh slings are constructed from interwoven steel wires, offering superior durability for lifting abrasive or hot materials.

  • Pros: Heat-resistant and strong.

  • Cons: Heavier and less flexible.

  • Common Uses: Foundries and metalworking industries.

 

2. Materials of Lifting Slings

Lifting slings are manufactured using different materials to cater to specific lifting requirements. The primary materials include:

  • Polyester: Lightweight, UV-resistant, and low stretch. Suitable for delicate loads and outdoor applications.

  • Nylon: Higher elasticity than polyester, offering shock absorption. Ideal for dynamic lifting applications.

  • Steel (Alloy and Wire Rope): Provides high durability and strength, best for heavy-duty applications.

 

3. Lifting Sling Specifications

When selecting a lifting sling, understanding key specifications ensures safe and effective operations:

 

a. Load Capacity (Working Load Limit - WLL)

Each sling has a rated working load limit, which varies based on material and sling type. Exceeding this limit can lead to failures and accidents.

 

b. Sling Length and Width

The length and width of a sling determine its lifting capacity and the type of load it can handle. Wider slings provide better weight distribution.

 

c. Safety Factor

Slings are designed with a safety factor (typically 5:1 or 7:1 for synthetic slings and 4:1 for steel slings), ensuring they can handle multiple times their rated capacity under ideal conditions.

 

d. End Fittings and Attachments

Different slings feature various end fittings such as hooks, shackles, or loops to enhance versatility and safety.

 

4. Common Applications of Lifting Slings

Lifting slings are used in various industries depending on their properties:

  • Construction: Lifting beams, pipes, and concrete structures.

  • Manufacturing: Moving heavy machinery and industrial components.

  • Logistics & Warehousing: Cargo securing and transportation.

  • Maritime & Offshore: Shipbuilding and offshore rigging.

  • Automotive & Aerospace: Handling large vehicle components and aircraft parts.

 

5. Best Practices for Safe Use of Lifting Slings

To ensure the longevity of lifting slings and workplace safety, follow these best practices:

  • Inspect Before Use: Check for signs of wear, cuts, abrasions, and deformations.

  • Use Proper Protection: Use corner protectors or sleeves to prevent damage to the sling and load.

  • Follow Load Limits: Never exceed the rated capacity of the sling.

  • Store Properly: Keep slings in a dry, cool place, away from chemicals and direct sunlight.

  • Train Personnel: Ensure workers are educated on proper handling and safety guidelines.

 

 

 

Understanding the basics of lifting slings—types, materials, specifications, and applications—can help you make informed choices for your lifting needs. Whether using webbing slings for delicate loads or chain slings for extreme lifting conditions, selecting the right equipment is essential for efficiency and safety. By adhering to best practices and maintenance guidelines, you can enhance the durability and performance of lifting slings in your operations.

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The Ultimate Guide to Webbing Slings Strength, Safety, and Versatility

When it comes to lifting heavy loads safely and efficiently, choosing the right lifting equipment is crucial. Among the many lifting tools available, webbing slings have become a top choice for professionals in construction, transportation, and industrial sectors. These versatile tools offer an array of benefits, from their strength and safety features to their adaptability in a wide range of lifting applications.

Webbing slings are flexible lifting devices made from high-strength synthetic fibers such as polyester and nylon. These fibers are woven into a flat or tubular webbing design, giving the sling its durability and ability to handle heavy loads. Webbing slings come in various configurations, including single-leg, two-leg, three-leg, and multi-leg designs, allowing them to be tailored for specific lifting needs.

Webbing slings are known for their exceptional strength-to-weight ratio. With a safety factor of 7:1, they can lift heavy loads while maintaining excellent load control and stability. This high load capacity makes them a preferred choice for industries dealing with machinery, construction materials, and large equipment.

Whether lifting from the center of gravity or at multiple points, webbing slings can handle various lifting configurations. Their flexibility allows them to adjust to uneven loads or awkward lifting angles, making them highly adaptable for different applications.

Webbing slings made from polyester are resistant to UV rays, weathering, and abrasion, ensuring they remain strong even in harsh environments. They are also lightweight and easy to handle, reducing strain on workers during use.

Unlike metal slings, webbing slings require minimal maintenance. They are easily cleaned and inspected, which simplifies the process of ensuring they remain in good working condition. Many slings also come with color-coded tags indicating their lifting capacity, helping workers quickly identify the right sling for the job.

Webbing slings are the perfect balance of strength, versatility, and safety. Their flexibility, combined with their lightweight design, makes them ideal for lifting in confined spaces or for handling delicate loads. Whether you’re lifting construction materials, machinery, or cargo, webbing slings provide the reliability and safety that you need.

At NANJING D.L.T SLING CO.,LTD, we offer a range of high-quality webbing slings, designed to meet the demands of both small and large-scale operations. Our slings are made from the finest materials, ensuring maximum strength and longevity.

webbing sling

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What Is a Duplex Webbing Sling?

A duplex webbing sling is a high-strength, flexible lifting sling made from two layers of durable synthetic webbing, commonly used for heavy lifting and secure load handling. These slings are widely preferred in industries such as construction, logistics, and manufacturing due to their lightweight, strong load-bearing capacity, and excellent safety features.

High Strength & Durability
Duplex webbing slings are made from high-quality polyester ,offering excellent load distribution and resistance to wear, UV exposure, and moisture.

Flexible & Lightweight
Unlike chain slings or wire ropes, webbing slings are softer and more flexible, reducing damage to delicate loads while being easier to handle and store.

Increased Safety
With a high safety factor (typically 7:1), duplex webbing slings provide a secure and reliable lifting solution, minimizing the risk of load slippage or failure.

Customizable & Versatile
Available in various lengths, widths, and capacities, these slings can be color-coded for easy identification, ensuring efficient operations on-site.

Where Are Duplex Webbing Slings Used?

· Construction & Infrastructure – Lifting steel beams, precast concrete, and heavy machinery.

· Shipping & Logistics – Securing and lifting cargo safely.

· Manufacturing & Engineering – Handling components with precision and care.

· Automotive & Aerospace – Moving delicate parts without surface damage.

Find the Best Duplex Webbing Sling for Your Needs

At NANJING D.L.T SLING, LTD, we manufacture high-quality duplex webbing slings that meet international safety standards. Our slings are CE and GS certified, ensuring reliability in demanding industrial environments. Contact us today to get expert advice on selecting the right lifting sling for your business!

webbing sling

 

📩 Get in touch with us today for a free consultation!

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What is the ASME standard for webbing sling?

The ASME (American Society of Mechanical Engineers) standard for webbing slings, specifically ASME B30.9, governs the safe use, maintenance, and inspection of webbing slings, which are used for lifting operations in various industries. This standard provides guidelines to ensure that webbing slings are used safely and effectively, preventing accidents and ensuring the safety of operators and the integrity of loads being lifted.

Webbing slings must be made of materials that are durable and resistant to wear and tear. Common materials used include nylon, polyester, and polypropylene. The ASME standard requires that slings made of synthetic materials be resistant to environmental factors like UV light, abrasion, and chemicals to ensure their longevity and safety.

The ASME standard dictates the minimum size, length, and strength of webbing slings to ensure they can handle the required loads. It also specifies how slings should be designed to minimize damage during use, such as avoiding sharp edges and ensuring the slings have adequate load capacity. The sling's capacity is often indicated on a label that includes the working load limit (WLL).

Regular inspection and maintenance are critical to the safe use of webbing slings. The ASME B30.9 standard provides detailed guidance on the inspection process. It requires operators to examine slings for signs of wear, fraying, and other types of damage before use. Slings should also be cleaned after each use to maintain their integrity.

ASME B30.9 outlines the importance of using the proper lifting techniques to prevent accidents. This includes ensuring the load is balanced and that the sling is correctly positioned. Operators must also be trained on how to safely use webbing slings to ensure the load is secured properly and the sling is not overloaded.

Webbing slings must undergo rigorous testing to ensure they meet the required safety standards. The ASME standard mandates load testing procedures to verify that slings can safely handle the specified weight limits. All webbing slings should be certified, and the certification labels should be visible and legible.

 Webbing slings have a limited lifespan, depending on their usage and the conditions they are exposed to. The ASME B30.9 standard requires that slings be retired after a certain number of uses or when they show signs of damage. Proper disposal procedures are also part of the standard to prevent accidents due to the use of damaged slings.

flat webbing slings

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Chemical Raw Materials And Product Transportation

 

Partnership 
Anhui Shengshi Datang Chemical Equipment Group Co., Ltd. has established long-term partnerships with multiple listed companies, consistently providing technical support to ensure the smooth operation of their production lines. Recently, our technical team overcame significant challenges and successfully secured a cooperation agreement with a major chemical enterprise in Xi'an, Shanxi Province.

delivering innovative solutions and reliable equipment to the chemical industry

Selection

Centrifugal Pumps
As critical equipment for material transportation in chemical production, centrifugal pumps rely on centrifugal force to transfer fluids.

Before startup, it is essential to ensure that the pump body and feed pipe are fully filled with liquid to create a vacuum state. Once activated, the motor drives the impeller to rotate at high speed, causing the liquid to spin rapidly. Under the influence of centrifugal force, the liquid is propelled from the center of the impeller to its outer edge, gaining energy and exiting the impeller at high speed into the volute casing. Inside the volute, as the flow channel gradually expands, the liquid's velocity decreases, converting part of its kinetic energy into static pressure energy. The liquid then exits through the discharge pipe at higher pressure.

rely on centrifugal force to transfer fluids

During this process, the center of the impeller forms a vacuum as the liquid is expelled, drawing more liquid from the storage tank into the feed pipe under atmospheric pressure or liquid level difference. This enables continuous transportation, akin to water droplets being flung outward when spinning an umbrella rapidly in the rain.

ensure that the pump body and feed pipe are fully filled with liquid to create a vacuum state

Installation
Proper installation is the foundation for the stable operation of chemical pumps. Our technical team formed a specialized group and traveled to the Xi'an facility to oversee the installation process.

Before installation, a comprehensive inspection of the pump and motor is required to ensure all components are intact, with no looseness or deformation. During installation, it is crucial to maintain the pump's levelness and alignment, as these directly impact its operational stability and service life. Using tools such as spirit levels, the pump's base is adjusted to keep vertical and horizontal deviations within specified limits.

Additionally, the alignment between the pump and motor must be ensured by adjusting the coupling's gap and position to align the centerlines of the two shafts, minimizing vibration and noise caused by misalignment. During installation, attention must also be paid to pipeline connections to prevent leaks and avoid imposing additional stress on the pump body. After installation, a trial run is conducted to check the pump's performance and promptly address any issues.

Proper installation is the foundation for the stable operation of chemical pumps

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How to classify graphite equipment

Graphite heat exchanger

shell - and - tube graphite heat exchanger
Function: Wall - type heat exchange between two media. There are various structural forms, such as: shell - and - tube graphite heat exchanger, round - block - hole graphite heat exchanger; rectangular - block - hole graphite heat exchanger, etc.


Graphite falling - film absorber


Function: Mass and heat transfer. Carry out falling - film absorption on soluble gases and remove the absorption heat at the same time. For example: shell - and - tube graphite falling - film absorber; round - block - hole absorber.


Combustion synthesis device

water - jacketed hydrogen chloride synthesis furnace
Function: Combustion or synthesis of combustible substances. It can also complete synthesis, cooling and absorption in one device at the same time; for example: water - jacketed hydrogen chloride synthesis furnace, three - in - one hydrochloric acid synthesis furnace, etc.

 

Graphite sulfuric acid dilution cooler

Graphite sulfuric acid dilution cooler
Function: Dilute (cool) sulfuric acid and other media, and can remove the dilution heat (cooling) in one device at the same time.

 

Graphite tower - type equipment

High-temperature resistant Graphite tower-type equipment
Function: Mass - transfer equipment for gas - liquid phase or liquid - liquid phase. Including plate towers and packed towers, etc.

 

Graphite mechanical equipment

Heat-resistant Graphite mechanical equipment
Function: Equipped with a power device, used for mixing, reacting, concentrating, evaporating, etc. of materials.

 

Graphite - lined equipment

Graphite - lined equipment
Function: Equipment with graphite rotors or plates as anti - corrosion linings.


Graphite pipelines and pipe fittings

Graphite pipelines and pipe fittings
Function: Used for transporting media and connecting equipment.

 

Graphite sealing materials

Graphite sealing materials
Function: Used for end - face sealing, packing sealing, flange sealing.


Graphite protective anode in cathodic protection system

Graphite protective anode in cathodic protection system
Function: Used as an external - current protective anode in the cathodic protection system.

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How to prevent corrosion of flanges in fluoroplastic magnetic pumps

Fluoroplastic magnetic pumps replace dynamic seals with static seals, keeping the flow components completely sealed. This solves the problems of leakage, spouting and dripping that cannot be avoided by mechanical seals in other pumps. The magnetic pump selects engineering plastics, corundum ceramics and stainless steel with corrosion resistance and high strength as manufacturing materials. Therefore, it has good corrosion resistance and can prevent the conveyed medium from being contaminated. The magnetic pump has a compact structure, beautiful appearance, small size, low noise, reliable operation and convenient maintenance.

Fluoroplastic magnetic pumps replace dynamic seals with static seals, keeping the flow components completely sealed

If no protective measures are taken for the flange of the fluoroplastic magnetic pump and it is exposed to a corrosive environment or contaminated industrial atmosphere, the corrosion rate will be very fast. In addition, due to the complex geometric shape of the flange connection, gap corrosion between the two flange faces and galvanic corrosion between different metals are prone to occur, which will seriously damage the integrity of the pipeline system. So how can flange connections prevent corrosion?

  1. Mechanical solutions: mainly by using protective covers and clamps to seal the gaps between flanges and flange faces, usually made of stainless steel or plastic with rubber sealing strips. This protection method is less flexible and requires storage of covers or clamps that match the size of various flanges completely.
  2. Thermoplastic solutions: Thermoplastics are essentially a kind of waxy fusible polymer heated at high temperature, which is sprayed onto the surface of the base material through professional thermoplastic equipment. The advantage of this protection method is that it can be remelted and reused, saving costs. However, this method still requires hot work, professional equipment and construction services. Although it can be reused, it is not easy to open and seal during maintenance.
  3. Tape or semi-solid anti-corrosion tape solutions: Rolled tapes (such as petrolatum tapes, wax or elastic polymer bandages) are protected by winding on the surface of the base material. Due to the good water resistance of semi-solid polymers, this protection method can provide reliable anti-corrosion protection.
  4. Maintenance paint solutions: Maintenance paint is a hard film that can be directly bonded to the base material, generally epoxy or polyurethane coatings. There are many corners and edges on the flange. Due to the edge thinning effect, conventional paint systems are difficult to effectively cover the edges. Although thickening the coating will solve the edge protection problem, it will also seal the fasteners and make them unable to be disassembled during subsequent maintenance. In addition, operating the bolt will damage the coating and must be repainted after maintenance.
  5. Polymer sealing bag solutions: The sealing bag can completely wrap the flange. Its composition consists of low-permeability polymers, corrosion inhibitor vapors and desiccants. It is easy to install, but the two ends of the bag are only sealed with tape instead of using a durable and effective mechanical bond. There is a large area of steam space inside the bag, which is easy to gather a lot of water, and the corrosion inhibitor will also be consumed over time.
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Introduction to Several Major Design Structures of GH Floating-head Tubular Graphite Heat Exchanger

 

The GH series floating-head tubular graphite heat exchanger, simply known as the floating-head tubular heat exchanger and also referred to as the graphite heat exchanger, is one of the products of Shengshi Datang, a graphite heat exchanger manufacturer with more than twenty years of production experience. Due to the special design of the equipment head and the use of graphite tubulars as the heat exchange medium for the internal tube sheets, it is named the GH series floating-head tubular graphite heat exchanger.

 

This article introduces three major design structures of the GH series floating-head tubular graphite heat exchanger of Shengshi Datang:

 

First, the design of this equipment takes into account the reduction of fluid resistance and is divided into two types: one is an ordinary heat exchanger, and the other is a condenser with a gas-liquid separator for an ordinary heat exchanger.

 

Second, this product is applied in technological transformation projects. The values are calculated based on the middle diameter of φ32/22 graphite tubes. For detailed design parameters (design pressure, design temperature, heat exchange area, etc.), please contact the technicians of Shengshi Datang, the graphite heat exchanger manufacturer.

 

Third, the floating-head tubular heat exchanger is widely used. This equipment is mainly used as a cooler, heater, condenser, and heater, etc. The following picture shows the structure diagram of the GH series floating-head tubular graphite heat exchanger of Shengshi Datang.

graphite heat exchangers

If you want to know more about where to find graphite heat exchangers, graphite condensers, graphite falling-film absorbers, graphite heaters and other graphite corrosion-resistant equipment, feel free to follow Anhui Shengshi Datang Chemical Equipment Group Co,Ltd.

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Knowledge of pumps

 

Knowledge of pumps

 

Magnetic drive pumps and centrifugal pumps are two common types of pumping equipment. They are different in structure, working principle, characteristics of use, and scope of application.

 

Structural difference

Centrifugal pump

Centrifugal pump usually consists of a motor, pump body, impeller, seal and other components, the motor drives the impeller to rotate at high speed, and the liquid is transported by centrifugal force.

Centrifugal pump usually consists of a motor, pump body, impeller, seal and other components

Magnetic pump

The magnetic pump cancels the mechanical seal, uses the magnetic vortex generated by the internal and external magnetic to drive the impeller, and the internal and external magnetic rotor transmits power through the magnetic coupler to achieve no leakage transport of the medium.

The magnetic pump cancels the mechanical seal

 

Working principle

Centrifugal pump

Centrifugal pumps use impeller rotation to generate centrifugal force, suction liquid from the inlet and discharge from the outlet.

Magnetic pump

The magnetic pump transmits power through the magnetic coupler, and the magnetic interaction between the inner magnetic cylinder and the outer magnetic cylinder makes the impeller rotate synchronously, and the medium is in a closed state throughout the whole process to prevent potential leakage.

The magnetic pump transmits power through the magnetic coupler

 

Usage characteristics

Centrifugal pump

Centrifugal pumps are simple and compact, suitable for high-flow transportation, and can be manufactured with corrosion-resistant materials, but there may be mechanical seal leakage problems and relatively low efficiency.

Centrifugal pumps are widely used in the transport of clean water, pure water and other liquids, as well as some specially designed centrifugal pumps can transport suspension and bulk solid suspension.

Magnetic pump

The magnetic pump has the advantages of zero leakage, no independent lubrication and cooling water, static seal of the pump shaft, overload protection, etc., but the price is relatively high, and it is not suitable for transporting media containing particles.

The magnetic pump is suitable for transporting flammable, explosive, volatile, toxic and valuable liquids, especially for industries with more stringent safety standards.

the advantages of zero leakage, no independent lubrication and cooling water, static seal of the pump shaft

 

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