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  wxhq-group.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Conveyors are material handling systems that allow for easy transporting of products, from powder to bulk to complicated geometries. They are integral to all kinds of systems, as they provide a fast and safe method of handling large volumes of materials. There are many kinds of conveyors, but their working principle remains constant across each type; move objects via gravity or by mechanical power from one destination to the next by using a frame that holds belts, buckets, rollers, or other moving components.

Simply put, roller conveyors are a form of conveyor belt that utilizes rollers - evenly-spaced rotating cylinders - to allow objects to skate across its surface. They move material from one place to another destination, and often leverage gravity or implement small motors to do so. The transported material must have a rigid riding surface that is supported by a minimum of three of the rollers. They are ideal for accumulation applications, and the rollers can reduce the inertia of products at a higher speed, making them useful conveyors after high speed sorting machinery.

Since the design of these conveyors is simplistic, many advancements have been made to allow roller conveyors to keep up with industry trends. The biggest innovation is the drive or live roller conveyor, where each roller is connected to a motor via a belt/chain/shaft to increase controllability. This equalizes the rate with which materials move down the pathway, and also allows these conveyors to have limited use in reverse, i.e. from low to high elevation. They can work well in bi-directional applications, as the rollers can direct material in either direction by switching the direction of the motor. In the next section, we will investigate the different kinds of powered roller conveyors, as there are many kinds suitable for use with a wide range of materials.

Types of roller conveyors
This section will detail the important kinds of roller conveyors present in the industry. Also, these roller conveyors can be a mix of many designs, depending upon the manufacturer.

Gravity roller conveyor
The gravity roller conveyor is a frame that holds free-rotating rollers and uses gravity to slide material down the line. They are used to carry light to medium weight products that do not require a motor, which makes them economical solutions for designers. They can be purchased with accessories such as curves, pop up stops, supports and hanging brackets, slide rails, and more, and are often made from steel, aluminum, and plastic. They are often implemented as temporary conveyors, alternatives for skate wheel conveyors, heavy-duty applications, and accumulating loads that do not require any specialized timing.

Belt driven roller conveyor
The belt-driven live roller conveyor utilizes a motorized belt to power each roller, allowing this conveyor type to control the motion of the materials being transported. They are preferred over typical belt conveyors when items must be stopped momentarily at control points, items must be turned, and/or side loading or slide unloading is necessary. The belt can be straight (as shown in Figure 3) or can be in a V shape for curved roller conveyors. Some belt-driven roller conveyors can support products wider than the frame width, thanks to the rollers being higher than the frame. In any arrangement, the rubber belt underneath the rollers must not encounter moisture, excessive heat, or debris as these conditions can quickly degrade the system. These conveyors are often used for handling medium to heavy loads that are dry and clean, and which require periodic stopping and/or reversible action.

Besides, there are many other kinds of conveyors except for roller conveyos like Motorized Roller ConveyorChain Conveyors and Belt Conveyors are quite popular in the market. For example, there are Double Speed Chain ConveyorSteel Chain ConveyorSlat Chain CconveyorNormal Belt ConveyorModule Belt Conveyor and other different types.


  tckjknittingmachine.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Nowadays, there are many kinds of knitting machines existing in the market. The most common one is sweater knitting machine.

Sweater knitting machine also referred to as flat bed or v-bed knitting machine. That have two rib gated, diagonally-approaching needle beds, set at between 90 and 104 degrees to each other and are positioned so that the upper ends form an inverted "V". Sweater knitting machine has two needle beds arranged in an inverted v-shape. This machine can be hand-operated or controlled by computer. The flat bed machine is widely used in the sweater industry. The interactions between yarn and knitting elements that create the fabric occur at the apex of the V and the fabric moves away downward between the two beds, drawn down by the take-down system. During knitting in v-bed knitting machine, the edges of the knock-over bits restrain the sinker loops as they pass between the needles and thus assist in the knocking over of the old loops and in the formation of the new loops.

Modern V-bed knitting machine is fully automated, electronically controlled, precision knitting system. The operation and supervision of the machines of the simpler type are also less arduous than for other weft knitting machines.

Another popular knitting machine is Shoes Upper Knitting Machine, which is mainly circular knitting machine. Compared to warp knitting machines, circular knitting machines create shoe upper material that offers better breathability, more design possibilities and less waste. Even when used for more casual physical activity, athletic shoes must be designed in a way that keeps feet cool and dry. Because of this, the vast majority of shoe upper material is made using spacer fabric. This is an incredibly breathable fabric that is highly adept at dissipating heat and moisture, due to a 3D structure that interconnects two pieces of textile with yarn in a way that induces airflow.

Unlike its toxic, laminated-layer foam predecessor, spacer fabric is made using a single, synthetic fiber-type fabric. This not only enables shoe uppers to be easily up-cycled at the end of their life, but also reduces the cost of processing while simultaneously making shoes more lightweight.

In recent years, there has been a palpable global trend towards athletic footwear, and the shoe upper manufacturing industry has responded accordingly. However, most space fabric manufacturing has been limited to production on warp knitting machines. While warp knitting machines are 8-9 times more productive than circular knitting machines, they offer several distinct disadvantages and present a clear barrier to entry for anyone looking to carve out a piece of the athletic footwear market or for manufacturers who operate on a smaller scale.

Unlike warp knitting machines that can only knit different colored patterns by changing the beams – a process that requires several hours – circular knitting machines can easily match various yarns and knits to produce different textures and patterns. As such, manufacturers can quickly and easily satiate market demand for more shoe design options. There are several benefits to being able to execute different design possibilities on a single machine. First of all, manufacturers are able to produce certain styles on a smaller scale. Not only is this essential for first-time shoe upper manufacturers, but is also ideal for those who want to test a certain style on a smaller scale before ramping up production.

Second, the circular knitting machine eliminates the labor- and time-intensive post-production dyeing step, allowing manufacturers to streamline production and cut costs. While warp knitting machines cost around $500,000, the average cost of a circular knitting machines is just $180,000. Established shoemakers can more easily transition into knitting spacer fabrics by investing in circular knitting machines to either replace or complement any existing warp knitting machines.

For those who want to produce shoes on a smaller scale – for example, apparel manufacturers looking to expand further into footwear or new entrants to the industry – the substantial cost of a warp knitting machine may be dissuasive enough to avoid making the investment. By investing in the relatively more affordable circular knitting machine instead, manufacturers are able to more easily transition into shoe upper manufacturing without sacrificing a hefty sum.


  suntrver.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

What is Energy Storage Systems?
Energy Storage Systems are the set of methods and technologies used to store energy. The stored energy can be drawn upon at a later time to perform useful operation.

For instance, many renewable energy sources (such as wind, solar energy or solar energy, tides) are intermittent. Sometimes the use of renewable energy is not direct when the energy is available, but at other times. Then we need energy storage so that energy can be used when needed.

Energy is available in various forms including radiation, chemical, gravitational potential, electrical potential, electricity, elevated temperature, latent heat and kinetic.

There are various methods and technologies to store various forms of energy. The choice of energy storage technology is typically dictated by application, economics, integration within the system, and the availability of resources. And they are often used as Residential Energy Storage System or Commercial Energy Storage System for Outdoor Power Supply.

Energy storage systems are also involved in converting energy from forms that are difficult to store to forms that are more convenient or economical.

A wide array of storage technologies have been developed so that the grid can meet everyday energy needs
Since the discovery of electricity, we have sought effective methods to store that energy for use on demand. Over the last century, the energy storage industry has continued to evolve, adapt, and innovate in response to changing energy requirements and advances in technology.

Energy storage systems provide a wide array of technological approaches to managing our power supply in order to create a more resilient energy infrastructure and bring cost savings to utilities and consumers. To help understand the diverse approaches currently being deployed around the world, we have divided them into five main categories:
Batteries – a range of electrochemical storage solutions, including advanced chemistry batteries, flow batteries, and capacitors
Thermal – capturing heat and cold to create energy on demand or offset energy needs
Mechanical Storage – other innovative technologies to harness kinetic or gravitational energy to store electricity
Hydrogen – excess electricity generation can be converted into hydrogen via electrolysis and stored
Pumped Hydropower – creating large-scale reservoirs of energy with water


  sheungwell.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Metal honeycomb substrates used in catalytic converters are made from extremely thin metal foil, typically with a thickness of just 0.05mm. By comparison the walls of a ceramic substrate may be four times thicker. For this reason, metal substrates offer less resistance to gas flow and therefore can accommodate a given flow rate with a lower pressure drop than an equivalent ceramic substrate. The improved flow properties of a metal substrate mean that, for a given level of pressure drop, a metal substrate can be made with a greater cell density than the ceramic alternative.

Metal Honeycomb Substrates
Since greater cell density results in increased surface area, this means that a metal substrate of a given volume will be more catalytically active than a ceramic one. Most metal substrates used in the cooking and heating sectors have between 100 and 200 cells per square inch (cpsi). Metal substrates can be made in a variety of profiles, with round, square and rectangular being most common. Another variable is the pattern of the corrugations in the foil, which can either be straight through or involve changes of direction. The latter option is known as ‘herringbone’ and gives rise to turbulence which increases the activity of the catalytic converter but at the expense of an increased pressure drop.

There are various ways of making metal substrates but the top-quality versions utilize Fecralloy foil which consists of 74% iron, 21% chromium and 5% aluminium. The main advantage of Fecralloy is that, when heated in air, a layer of aluminium oxide forms on the surface which protects the iron from corrosion and also provides a good key for the catalytic coating. Therefore this type of metal substrate is hygienic enough to use in cooking appliances.

Except for this, there are also other kinds of Honeycomb Substrates such as Ceramic Honeycomb SubstrateMetallic Honeycomb SubstrateCeramic Honeycomb Substrate Catalyst Carrier, etc. And the Honeycomb Substrates are always used as a carrier for catalyst in chemical reactions.

Chemical reactions occur faster in the presence of a catalyst because the catalyst provides an alternative reaction pathway with a lower activation energy than non-catalyzed reactions. The catalyst is not consumed in the process and can continue to act repeatedly. Hence only very small amounts of catalyst are required to alter the rate of a chemical reaction. We offer a full range of metal catalysts in varying purities and concentrations that includes homogeneous catalysts, supported/unsupported heterogeneous catalysts and fuel cell catalysts for anodes, cathodes, electrodes.

Metal catalysts are extensively used both in the research laboratory and in industrial/manufacturing processes. Indeed, it is hard to find a complex synthetic reaction or an industrial process that does not, at some stage, require a metal catalyst.

Transition metals in particular are the metal of choice for use as catalysts in organic, organometallic and electrochemical reactions owing to their ability to exist in a variety of oxidation states, interchange between oxidation states form complexes with organic ligands, and act as a good source of electrons. Many key transformations in organic synthesis, e.g., cross-coupling reactions that include the Nobel Prize-winning Heck, Suzuki, and Negishi reactions, require the use of such late transition metals as palladium, platinum, gold, ruthenium, rhodium, or iridium.

We offer a wide selection of homogeneous and heterogeneous metal/precious metal catalysts for a broad range of organic synthetic reactions including metal complexes with chiral ligands for asymmetric hydrogenation, novel palladium coupling catalysts, platinum group metal (PGM)-based heterogeneous catalysts as well as Sponge Nickel catalysts. The benefits of using our metal catalysts include:
Shorter synthetic routes
Efficient manufacturing processes
Cost effective production
Safer environment

Except for metal catalyst, honeycomb substrates can be also used for some other catalysts like Ceramic CatalystUniversal Catalytic ConverterIndustry Metal CatalystIndustry Ceramic CatalystCatalytic Converter Parts, etc.


  lsyongrun.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

For a SBR Rail and Block or a TBR Rail and Block, there are many linear materials may be needed. Linear bearings are definitely one of them.

Linear bearings generally use a pad, bushing, or roller system to carry a load on a rail that need not be a straight line. The rail can be most any length, although that dimension is limited by the actuator.

The durability of the bearing is determined by the load and required speed. Furthermore, rails can generally be any profile – simple flat surfaces, round polished rods, or complex profiles with polished ground surfaces on which balls or cylindrical rollers can ride. Hard (Rockwell 60) and ground bearing surfaces work best.

Further classifications might be by size. For instance, miniature linear bearings might work well moving a biologic slide sample just a few millimeters beneath a microscope lens while industrial-bearings on injection molding machines carry tooling of several tons.

Bushings provide possibly the simplest linear bearing. These thin-walled cylinders can be injection molded of proprietary polymers infused with a lubricant. An oil-infused bronze design, also cylindrical, rides on a polished round rod. This linear-bearing classification is often referred to as slides.

Purpose-built linear bearings are available for frequently encountered tasks, such as pull-out equipment drawers or storable work surfaces. These usually light-duty devices let polymer wheels or ball bearings ride on stamped or rolled steel rails. Telescoping arrangements allow designing pull-out equipment drawers into cantilevered positions while supporting up to 50 lb or more for maintenance.

Except for linear bearings, many linear materials are also required such as Linear GuideLinear StageLinear ShaftMiniature Linear RailLinear Block, etc. Also, some other bearings are worth mentioning like rod end bearing and needle roller bearing.

rod end bearing is a common type of mechanical joint used on the ends of control rods. The steering columns in most cars, trucks and other vehicles, for example, feature tie rods with a rod end bearing. Of course, tie rods are designed to connect a vehicle's steering rack to its steering knuckle. As a result, tie rods must be able to rotate according to the direction in which the wheel is turned. Rod end bearings allow tie rods to perform this rotation in a precise and controlled manner.

Also known as a heim joint in the United States or a rose joint in the United Kingdom, a rod end bearing is a mechanical joint that features a rounded ball-like swiveling tip. They were invented in Germany during the 1930s to 40s for use in aircraft control systems. This promoted a company called H.G. Heim Company to patent and produce its own rod end bearings in North America, which is why the mechanical joint now has the moniker "heim joint."

H.G. Heim Company has since closed its doors for business, but rod end bearings are still produced and used throughout the world. Automotive tie rods are just way in which rod end bearings are used. They are used in countless other applications in which an articulating joint is needed, including aircraft control systems, steering links, track rollers and more.


  kdpackmachine.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

cartooning machine, sometimes called a cartoner for short, is a type of packaging machine. Its sole purpose is to form cartons. Have you ever seen a milk carton? If you look at the average milk carton in the grocery store, a cartooning machine probably made it. A cartooning machine forms cartons that stand up straight, close, are folded, side-seamed, and then, ultimately, sealed.

Cartoning machines can be sub-divided into two basic types:
Vertical cartooning machines
Horizontal cartooning machines

A carton machine will pick up a single piece from a stack of fold carton and then get it to stand up straight, or erect. The machine will fill it with a product or a number of products horizontally through an end that is open, and then close it by tucking an end flap of the carton or putting on glue or adhesive. It is not that hard to understand, but for those who aren’t involved in the cartoning field, it can be a little tricky to understand if they haven’t seen one first-hand in action. The product can be pushed into the carton with either pressurized air or with a mechanical sleeve. Technology is always changing, and newer, better, and more economical ways of doing the same job are always coming out. However, for a number of applications, the products are inserted into the carton by hand. A cartoning machine is often used for packaging sundry goods, cosmetics, confectionary, foodstuffs, etc.

A cartoning machine which produces a folded carton, fills it up with a product or several products vertically through an end that is open, and then closes it by tucking in the end flap and applying glue or adhesive, is called an end-load vertical cartoning machine. Cartoning machines are used on a regular basis for packaging medicine, confectionary, cosmetics, etc.

Except for cartoning machine including Automatic Cartoning MachinePackaging Production Line Machine and so on, the packaging machine is also a popular one.    
Packaging Machine is a device designed for the assembly of unit loads from individual items. Usually a part of automated assembly lines, packaging machines are the final step in the manufacturing process and the first step in the transportation process. They may be automatic or semiautomatic and can handle materials packaged in rigid, semirigid, or soft containers and materials not packaged in containers, such as metal castings, sheet metal, rolled metal sections, and lumber. The machines can be set up to handle items of a given standard size or items within the same range of standard sizes, with the necessary adjustments being made either manually or automatically. They can be used to make up unit loads on auxiliary devices, such as pallets or skids. There are machines that only assemble loads, and there are machines that both assemble and break up loads.

There is great variety in the design of packaging machines. Among the factors that influence design are the specific features of the manufacturing process and the properties and dimensions of the goods. The unit load consists of a stack of individual items that have been collected in sequence in accordance with the load-sorting plan, which determines the relative positions of the items. Further development of the design of packaging machines has been based on matching the dimensions of packaging materials to those of the as-yet-unpackaged goods and on considerations of the size, shape, and weight of the unit loads. Such standardization makes it possible to select the optimal industrial methods for machine packaging, which is, in turn, a prerequisite for the design of unified and universal packaging machines. The first packaging machines appeared in the USSR and abroad during the 1940's.

Packaging machines are used for the assembly of unit loads from sheet goods, from bulk goods in sacks, and from individual items in the metallurgical, printing, and wood-products industries. Such machines may be designed to assemble unit loads horizontally, vertically, or in a manner that combines horizontal and vertical operations. In machines designed for horizontal operation, the goods from the conveyor belt, guided by the distributor in accordance with the work plan, are conveyed into the collector. There the goods form a layer, which is moved by the carriage of a twin-chain conveyor to the flaps of the stacking device. The flaps are then opened, the layer of goods is lowered onto the pallet, and the stacking device is readied to receive the next layer. After the last layer is stacked, the load proceeds to the delivery conveyor and from there to the exit conveyor. The distributor makes it possible to carry out sequential sorting of items of various standard sizes according to a variety of programs by making the required adjustments in the control system.

What's more, there are some other machine may used in the production. For example, there are Automatic Strapping MachinePaper Box MachinePaper Cup Machines, etc.


  dhlcentrifugalfan.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Axial vs Centrifugal Fans
There are two primary varieties of fan, axial fans and centrifugal fans. Pelonis Technologies, Inc. (PTI), a global leader in fan technology for more than 25 years, manufactures both axial and centrifugal fans. The design and function of a centrifugal fan is very different from those of an axial fan. Their differences make them each suited for different applications and customers are sometimes unclear as to which fan type will best suit their needs.

Axial Fans
Axial Flow Fans date back to the horizontally configured windmills of Europe in the Middle Ages. The first electrically powered fans, introduced in the 1880s, were axial fans. Axial fans are named for the direction of the airflow they create. Blades rotating around an axis draw air in parallel to that axis and force air out in the same direction. Axial fans create airflow with a high flow rate, meaning they create a large volume of airflow. However, the airflows they create are of low pressure. They require a low power input for operation.

Centrifugal Fans
The centrifugal fan was invented in 1832 by military engineer Lieutenant General Alexander Sablukov of the Russian Empire's Imperial Russian Army. Often called blowers, centrifugal fans vary differently from axial fans. The pressure of an incoming airstream is increased by a fan wheel, a series of blades mounted on a circular hub. Centrifugal fans move air radially - the direction of the outward flowing air is changed, usually by 90°, from the direction of the incoming air.

The airflow created by centrifugal fans is directed through a system of ducts or tubes. This helps create a higher pressure airflow than axial fans. Despite a lower flow rate, centrifugal fans create a steadier flow of air than axial fans. Centrifugal fans also require a higher power input.

Application of Axial Fan
Because of the low-pressure high-volume airflows they create, axial fans are best suited for general purpose applications like Marine Fans. For example, they excel at moving air from one place to another, cooling confined spaces such as computers, and cooling larger spaces such as work spaces.

A standard AC model is energy efficient, using no more than 100 watts when on high speed. AC fans can be connected directly to a DC power source, such as solar panels or batteries. Since the end goal in units like vending machines is an even flow of cooling power, an AC fan is the fairly obvious choice.

Application of Centrifugal Fan
Because of the high pressure they create, centrifugal fans are ideal for high pressure applications such as drying and air conditioning systems. As all of their moving parts are enclosed and they also have particulate reduction properties that makes them ideal for use in air pollution and filtration systems. Centrifugal fans also offer distinct benefits.


  cnslewingring.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Slewing Bearings, or turntable bearings, are ball or roller style bearings composed of two concentric rings either of which may include a gear. This type of bearing enhances load support and power transmission in all directions, and is typically employed to support heavy loads for slow applications and large equipment such as earth excavators and construction cranes. The unique power and versatility of slewing ring bearings has made them increasingly valuable in a wide array of industries, including construction, industrial, robotics, machine tooling, and medical applications.

To "slew" means to turn without change of place. A slewing bearing or slew[ing] ring is a rotational rolling-element bearing that typically supports a heavy but slow-turning or slowly-oscillating loads.

Slewing rings are known worldwide as premium products in the field of rolling bearing technology. These machine elements have proven themselves many times over; they have high load-carrying capacity, a versatile range of applications and are highly cost-effective. Due to their design, a single bearing can reliably support radial, axial and tilting moment loads. It is therefore possible in many cases to replace bearing arrangements comprising a combination of radial and axial bearings by a single bearing. This reduces - in some cases considerably - the costs and work required in the design of the adjacent construction and the fitting of bearings.

Slewing rings are sealed on both sides, lubricated with a high-quality grease, can be relubricated via lubrication nipples and are particularly easy to fit. The bearing rings are supplied without gear teeth or, in order to achieve simple drive solutions, are available with external or internal gear teeth.

How do you test a slewing bearing?
One of the most basic indicators of slewing ring bearing problems is the condition of the lubricant. If metal particles or flakes are apparent, some form of wear is taking place. Grinding, popping, or clicking noises from the bearing typically mean there is inadequate lubrication and/or excessive wear in the raceway.

Slewing Ring Bearings From Emerson Bearing
For more than 50 years, Emerson Bearing has been the go-to provider of top-quality roller and ball bearings for customers around the world. Our selection includes everything from miniature precision bearings to five-foot mill bearings in a variety of styles and materials to suit the needs of your applications. We are dedicated to providing our customers with the right bearings at competitive prices.

Slewing Ring Bearing Applications
Slewing ring bearings are often relied upon to support loads in very large, heavy-duty equipment. Their exceptional combination of heavy load support and mobility enhancement makes them useful in a variety of industries and applications. They can be used as Slewing Bearing for New EnergySlewing Bearing for Engineering MachinerySlewing Bearing for Automation EquipmentSlewing Bearing for Amusement MachinerySlewing Bearing for Agricultural MachinerySlewing Bearing for Logistics WarehousingSlewing Bearing for Environmental Protection MachinerySlewing Bearing for Mining MachinerySlewing Bearing for Forest Machinery, etc.


  chinapepipe.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Nowadays, PPR is the most commonly used material for pipes and fittings. PPR is a random copolymer polypropylene. In winter, the flexibility of PPR water pipes will decrease, while the rigidity will increase and flatten. If the pipe is impacted by an external force, the surface of the pipe will crack more seriously.

Therefore, PPR Pipe manufacturers suggest that when we use or install PPR Pipe and Fittings in winter, we need to be more careful to prevent pipe collisions and littering. Caring for the pipeline means caring for our own water consumption.

PPR Fittings are the most commonly used materials in home decoration, and their capabilities are not small, such as water supply, hot water pipe systems, heating pipe systems and air conditioning pipes. Engineering hot water is generally directly related to the use of ppr pipe fittings, which are more stable, safe, easy to install, and cost-effective. Engineering hot water ppr pipe fittings can also be hidden. When the concealed pipe penetrates the wall, in order to ensure the safety, service life and maintenance of the pipe, a metal sleeve can be installed to ensure the installation of ppr pipe fittings.

In installation engineering, ppr pipe fittings have the advantage of hot-melt connection. Pipes and pipe fittings are welded by temperature heating, so that water is not easy to leak, but the heating temperature and time need to be accurate and not too long. If the temperature is too high for too long, the pipes and fittings will be damaged by hot melt. If the time is too short and the temperature is too low, the pipes and fittings will be unstable and easy to burst

Nowadays, ppr pipe fittings are becoming more and more popular in society, involving water supply, sewage, irrigation, gas transmission and other uses. Due to its own advantages and characteristics, it can stand out in the pipeline market and occupy a very important position.

Another kind of widely used pipe is HDPE Pipe and FittingsHDPE Pipe or PE Pipe is a robust, flexible piping system, used for fluid and gas transfer across the world.

Polyethylene's toughness, immunity from corrosion, excellent resistance to chemicals and low weight have contributed to its continued appeal for use in situations where cost-effective and reliable piping systems are required such as activities like horizontal direct drilling.

High-density polyethylene, unlike polypropylene, cannot withstand normally required autoclaving conditions. The lack of branching is ensured by an appropriate choice of catalyst (e.g. Ziegler-Natta catalysts) and reaction conditions.

The physical properties of HDPE can vary depending on the moulding process that is used to manufacture a specific sample; to some degree a determining factor are the international standardised testing methods employed to identify these properties for a specific process. For example, in rotational moulding, to identify the environmental stress crack resistance of a sample, the Notched Constant Tensile Load Test (NCTL) is put to use. Owing to these desirable properties, pipes constructed out of HDPE Fittings are ideally applicable for potable water, and waste water (storm and sewage).

Harnessing the power and advantages of polyethylene, high-performance poly pipe / polyethylene pressure pipes has a wide range of applications.


  cell2power.com
Yazar: lizhitian523 - 10 saat önce - Forum: Haberler - Yorum Yok

Backup Battery Unit, or uninterruptible power supply (UPS), is primarily used to provide a backup power source to important desktop computer hardware components. In most cases, those pieces of hardware include the main computer housing and the monitor, but other devices can be plugged into a UPS for backup power, depending on the size of the UPS.

What Does a Battery Backup Do?
In addition to acting as a backup when the power goes out, most battery backup devices also act as power "conditioners" by ensuring that the electricity flowing to your computer and accessories is free from drops or surges. If a computer isn't receiving a consistent flow of electricity, damage can and often does occur.

While a UPS system isn't required for a complete computer system, including one is always recommended. The need for a reliable electricity supply is often overlooked and not fully realized until damage has occurred.

Battery Backups: Where They Go
The battery backup sits between the utility power (power from the wall outlet) and the parts of the computer. In other words, the computer and accessories plug into the battery backup, and the battery backup plugs into the wall. UPS devices come in many shapes and sizes but are most commonly rectangular and freestanding, intended to sit on the floor near the computer. All battery backups are cumbersome due to the batteries located inside.

One or more batteries inside the UPS provide power to the devices plugged into it when power from the wall outlet is no longer available. The batteries are rechargeable and often replaceable, providing a long-term solution to keeping your computer system running.

Battery Backups: What They Look Like
The front of the battery backup will usually have a power switch to turn the device on and off and will sometimes have one or more additional buttons that perform various functions. Higher-end battery backup units will also often feature LCD screens that show how charged the batteries are, how much power it's using, how many minutes of power are left should power be lost, etc.

The rear of the UPS will feature one or more outlets that provide battery backup. In addition, many battery backup devices will also feature surge protection on additional outlets and sometimes even protection for network connections and phone and cable lines.

Battery backup devices have varying degrees of backup ability. To determine how powerful a UPS you need, first, use the OuterVision Power Supply Calculator to calculate your computer's wattage requirements. Take this number and add it to the wattage requirements for other devices you'll plug into the battery backup. Take this totaled number and check with the UPS manufacturer to find your estimated battery runtime when you lose power from the wall.

Battery backup with Battery Accessories for Energy Storage can be used in many Industrial prodution such as E-MobilityMedical Healthcare and so on.


 
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