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• Создано: 06-07-22
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yuchaobolt.com

Описание:  yuchaobolt.com The function of a bolt is to provide a clamp load or preload (Fp) to sufficiently compress and stress the gasket and resist the parting forces exerted by the hydrostatic end force and other external loads. The hydrostatic end force is created by the pressure of the internal fluid across the internal area of flange. The internal area is generally the inside diameter of the sealing element. All bolts behave like a heavy spring. As you turn down the nut against the flange, the bolt stretches and the flange and gasket compress. All bolt-tightening methods result in stretching the bolt. The torque-tightening method uses the thread helix of turning the nut against the reactive forces of the flange to stretch the bolt. The hydraulic bolt-tensioning method utilizes an annular piston threaded on the end of the bolt to provide an axial stretch. There are many types of bolt with different shapes like hex bolt, carriage bolt, square head bolt, stud bolt, ball head bolt and so on. The bolts always work together with a nut. A nut fastener is a mechanical fastener with a threaded hole. It is attached to a bolt, screw or stud to provide a clamping force and prevent axial movement. For example, a bolt is inserted through two parts, with aligned holes, and a nut is then screwed onto the bolt. The shaft of the bolt prevents radial movement of the parts, while the head of the bolt and the nut together prevent axial movement. The most common type of nut is the hex nut. This has a hexagonal outer shape for the faces of tools to apply torque when fastening. To provide a secure fastening, this type of nut typically relies on torque being applied to generate an axial force. This axial force causes sufficient friction at the threads so as to prevent the nut from unscrewing. The force may act between the bolt head and the nut, causing compression of the parts being fastened. Alternatively, it may act between a pair of adjacent nuts, allowing parts to be fastened more loosely. A nut and bolt clamping two parts together. Thread-locking adhesive may also be applied to the threads of a nut to prevent it from working loose. Special locking nuts may also be used which work with devices such as pins, lockwire and nylon inserts to prevent loosening. Older nuts were often manufactured with a simpler square head and this design is still sometimes used to enable increased torque to be applied using a spanner. Also, the nut has different types as well to cooperate with bolts, such as hex nut, flang nut and square nut. 

Дата Публикации: 06-07-22

westwu-machine.com

Описание:  westwu-machine.com For a API pipe production line, you may need a series of machine to consist and work together. The first necessary one is metal spraying machine The Metal Spraying is a very critical operation in the manufacture processes of metallized film capacitor. Since the metal particles are produced by wire melted and high velocity to coat in the end faces, it makes contact with the capacitor winding primarily by partial penetration of the pockets in the end faces formed by staggering the films. Factors which affect the degree of penetration are mainly the velocity of the metal spray particles and their size. So the following important factors are influential capacitors quality: The temperature of metal spray particles, the size of metal spray particles, the velocity of metal spray particles, the average of metal spray particles Incorrectly selected pipe spray painting machine can cause severe damage to end faces of the windings and produce unacceptably high power factor capacitors. The steel pipe spraying coating machine or called steel pipe painting production line is designed through our comprehensive research and accumulated ten-year of experience; as the requirements of regarding above specially performance of metal spraying in metallized film capacitor. Another indispensible equipment is steel pipe printing marking machine. Companies that produce metal pipes, regardless of whether they are involved in construction, aerospace, electronics, etc., code these materials to enable traceability, display important production data, and prevent counterfeiting. These codes generally take the form of numeric lot numbers or machine-scannable bar codes. Important Considerations for Metal Pipe Marking and Coding Printing codes with a automatic marking machine in a consistently legible manner—in often challenging environments—requires you to consider certain key factors. Chief amongst these considerations are that: Metal is non-porous: Unlike other substrates like wood, cardboard, and paper, metal does not absorb the ink applied to its surface. Accordingly, solvent-based inks are needed for this application, as they dry quicker than water-based inks—producing a sharp image on non-porous substrates. The environment matters: The continuous production lines that create metal pipes are often in harsh environments. Higher temperatures, humidity levels, dust, and tool vibrations can all affect the success of the printing process. Facilities where these environmental factors are present need to find printers and inks that can accommodate them. You need to understand your production line needs: To uncover the printer and ink that is right for your operation, you need to understand your steel pipe weighing lengthing marking machine's required printing speed, print resolution, mobility needs, print size, and the sizes of the pipes to be marked. Understanding all of these properties will help determine which printer type and model is best suited for you. Besides what mentioned above, there are also some machines needed such as steel pipe rust removing machine, OCTG pipe color ring banding machine, OCTG pipe coupling machine, etc. 

Дата Публикации: 06-07-22

tfcvalve.com

Описание:  tfcvalve.com A ball valve is a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the medium can flow through or is blocked. They are characterized by a long service life and provide a reliable sealing over the life span, even when the valve is not in use for a long time. As a result, they are more popular as a shut off valve then for example the gate valve. For a complete comparison, read our gate valve vs ball valve article. Ball valves are more resistant against contaminated media than most other types of valves. In special versions, ball valves are also used as a control valve. This application is less common due to the relatively limited accuracy of controlling the flow rate in comparison with other types of control valves. However, the valve also offers some advantages here. For example, it still ensures a reliable sealing, even in the case of dirty media. Ball Valve Function Basics A ball valve functions as a quarter-turn valve, which controls flow through a hollow, perforated, and pivoting sphere, hence the name. It is in the same valve family as butterfly valves and plug valves, which are also quarter-turn valves. The sphere has a port, or a bore, in its center, which is critical to its function. When the bore in the ball valve function is lined up with the associated pipeline, the valve is open, so fluid can move through the bore. Turned 90 degrees, it is situated perpendicular to the flow of the fluid, so the valve is closed and the fluid can’t come through. That being said, ball valve function is not well suited to applications in which you need to throttle the flow of a fluid. The way a ball valve functions makes it easy to see if the valve is open or shut. The handle that operators use to adjust where the sphere is aligned with the flow when the valve is open, and it is perpendicular when the valve is closed. And the ball valve can be devided into many different types for different functions, such as floating ball valve, trunnion mounted ball valve, top entry ball valve, dbb ball valve, subsea ball valve, etc. Another widely used valve is butterfly valve. The invention of the butterfly valve has allowed for the improvement of processes and applications in various industries. What is a Butterfly Valve? A butterfly valve is a mechanism that regulates the flow of materials within large pipe diameters by the quarter-turn rotation of a disc. A rod feeds through the center of a disc and this rod is connected to an actuator that controls the motion of the disc. The disc position is either parallel or perpendicular to the flow of media. A butterfly valve differs from other valves because the disc is always in the flow causing a pressure change for any position of the valve. Sound systems rely on dependable valves. Our butterfly control valve selection is made up of disc valves perfectly sized for various applications and made in precise accordance with industry standards. Find the best butterfly valve for your specific operation by browsing our products page. For custom parts, refer to our request a quote page. What is a Butterfly Valve Used For? A butterfly valve regulates flow by starting, slowing, or stopping media. The disk opens and closes with a low-torque rotation of 90 degrees and works for any compatible application. Because they cost less and are lighter weight, the butterfly valve is often preferred over other types of valves. For some processes, extreme temperatures and corrosion are factors that would easily compromise a valve’s seal. The butterfly valve withstands extreme cold or extreme heat. This means the seal maintains its integrity which is critical for high-stakes applications such as energy production and petroleum processing (as one leak could threaten public safety or the environment). Also, butterfly valves have different types as well. For example, there are triple offset butterfly valve, high performance butterfly valve, center lined butterfly valve and so on. 

Дата Публикации: 06-07-22

subbuteo.com.cn

Описание:  subbuteo.com.cn WHAT IS A GLUE PEN? A Glue pen is basically a pen with liquid glue inside instead of ink. You write with the pen and glue comes out instead of colored ink. No squeezing is required and you can apply the smallest amount of glue precisely! GLUE PEN RESIST STEP BY STEP The Glue pen is great to use in watercolor techniques, as you can draw with the glue and then paint over it with watercolors to reveal the hidden pattern behind. Step by step tutorial showing you how to create a glue pen resist for your rainbow watercolor wash! 1. Draw your design with the glue pen On a blank sheet of watercolor paper, doodle or draw your resist design using the glue pen. This glue pen has a clear glue for ink and the design you draw won’t be easily visible unless you tilt your paper to the light. Let this glue design dry for a few minutes, it shouldn’t take longer than 5 minutes. 2. Paint with your watercolors Paint with your watercolors on top of the dried glue design. Add any kind of watercolor wash on top. You don’t have to make it a rainbow, but the rainbow is super fun to paint. 3. Let the watercoloring dry to reveal the resist. One of my mantras as a crafter and a product reviewer is "There is no BAD products- only finding the right one for the job at hand." And by and large, that is true. The only time when you really need to know "which is better than that" is when you have multiple choices in the same product category. And the main products except for lithium battery glue pen also contains lithium battery hot cutting pen. Remember to get the suitable accessories including glue pen accessorie and hot cutting pen accessories for your pen. 

Дата Публикации: 06-07-22

purestchem.com

Описание: purestchem.com Since the introduction of aspirin in 1899, and more particularly since the advent of antibiotic "wonder drugs" in the 1940s, society has come to rely on the widespread availability of therapeutic drugs at reasonable prices. It was a tremendous challenge to bring penicillin to market and could not have been done without the simultaneous development of both product and process under the inspired leadership of Howard Florey over a 10 year period starting in the early 1930s, much has changed in drug development, but the timelines remain long, and the obstacles to success remain high.       For drugs delivered to patients in crystalline form, the physical properties of the pharmaceutical intermediates or active pharmaceutical ingredient (API) including crystal form, size and shape have the potential to impact bioperformance, particularly for low-solubility compounds, where the rate-limiting-step in drug uptake may be the dissolution of the API in the gut. These physical properties of the API are often controlled in the final API crystallization step. Because most small molecule drugs (.90%) are delivered in crystalline form, and currently about 90% of new API's being pursued are classified as having low solubility in water, a well-controlled crystallization of the API is often a vitally important operation in pharmaceutical manufacturing.    Moreover, it is a difficult operation because of uncertainty in the crystal forms that will appear, and because of the many challenges associated with scaling-up crystallizations from laboratory to manufacturing scale. Although great emphasis is placed on the therapeutic and chemical discovery aspects of new APIs, it must be emphasized that the successful entities will eventually need to be manufactured. Most companies seek to minimize manufacturing costs and maximize process portability by applying the simplest manufacturing process capable of producing their drugproduct with desired attributes. Because only 10% of the compounds in development survive the efficacy and safety hurdles in the clinic and become marketed drugs, there is also great value in minimizing R&D costs (including clinical trials), which are estimated to be about $1 billion per launch, with a remaining life protected on-patent of typically only 6–10 years.    Another application for intermediates is in Pesticide. Pesticide intermediates are used to manufacture agriculture and other industrial products. These are used in the synthesis of the active ingredient or in the production of pesticide products. Pesticides and pesticides intermediates are raw materials used for the manufacture of technical grade of active ingredient by chemical reactions or purification. It can be obtained from other sources or can be manufactured on similar site as that of the final pesticide product. Environmental Protection Agency (EPA) requires information regarding any environmental or toxic qualities of pesticide that may be harmful and these pesticides are thoroughly tested for effectiveness. These intermediate substances are also subject to regulation under the toxic substances control act (TSCA).    These are the vital substances used for the production of active ingredient used in the formulation of pesticide. Thus, extensive demand for agricultural products drives the global pesticide intermediate market. Further, increase in global population and food demand boosts the market growth. However, stringent regulations associated with the production and usage of pesticide intermediate restrain the market growth during the forecast period. Moreover, manufacturers of pesticide intermediate products emphasize more on the production of organic products to ensure its friendliness with crops, humans, and the environment.

Дата Публикации: 06-07-22

ownacechina.com

Описание: ownacechina.com    When you want to move a lot of items or big stuff, you need a special vehicle that can bring so many items in a dump. The best vehicle that can load a lot of items at the same time is a truck. What is actually a truck? A truck is a kind of heavy vehicle that is used to load big items and it has a very strong engine. Anyway, let us find out all about a range of trucks for your information. What is a truck used for?<  In general, trucks are used to load heavy items or a large number of items from one place to another place. This truck is usually used in industry to transfer a large number of products. This truck also comes with some wheel options. The number of wheels resembles the size of the truck and how much it can load stuff. The bigger the size of the truck, the more it can load goods. Somehow, there are so many types of trucks that are used according to its function. What are the types of trucks?   Somehow, every type of truck has its own function and use. There are so many types of trucks that you should know based on its function such as: This truck is very powerful and big enough. It has a function to move a boat from the factory to the release location. This truck also has a very long body and only runs slowly when it loads a boat. Moreover, this truck is not used for distant travel or only used around the factory area.   Car transporter is a type of truck that is used to load some cars at the back. A car transporter truck comes with various sizes depending on the number of the car that it can load. It usually has two levels of back loaders. Each level can load three up to four cars.   The cement truck is a kind of truck which is used to mix cement for the industry. Basically, it has a medium-sized body with a tube on the back. The tube will spin to mix the cement in large quantities. A container is a kind of big truck that has a big container at the back. The container has a square form to load items and make them safe during the transfer. Container truck also comes with various sizes from the smallest one to the largest one. A logging truck is a type of truck which is commonly used to load logs or woods. This truck has a very spacious dump to load so many woods. It also has a very big body with at least 10 wheels. As for characteristics and models of truck, it can also be devided into many kinds like light-duty truck, heavy-duty truck, special purpose truck, truck trailer, pickup truck, light-duty cargo truck, box truck, dump truck, heavy-duty lorry truck, truck tractor, etc.

Дата Публикации: 06-07-22

hongkefans.com

Описание:  hongkefans.com Axial vs Centrifugal Fans There are two primary varieties of fan, axial fans and centrifugal fans. Clear the Confusion — Axial Vs. Centrifugal To help clear up that confusion, here is a breakdown of the fan types, their benefits, and their uses. 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 FansAxial 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 Centrifugal FansThe 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. Fan Applications Axial Because of the low-pressure high-volume airflows they create, axial fans especially small axial fans are best suited for general purpose applications. 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. Centrifugal 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 the moving parts of small centrifugal fans are enclosed and they also have particulate reduction properties that makes them ideal for use in air pollution and filtration systems. Remember to get the suitable fan accessories series for normal work of your fans.         

Дата Публикации: 06-07-22

dongmumould.com

Описание: dongmumould.com    Metal Stamping Die is a cold-forming manufacturing process that uses specialized tools (i.e., dies) and equipment (i.e., presses) to form and cut sheet metal into various shapes and sizes. At the start of a stamping operation, the die(s) is/are installed within the press(es), which provide(s) the force needed to turn the material into the desired component. While stamping dies may vary from project to project depending on the part and production needs, they can be categorized into two main groups: single-station dies and multi-station dies. Below, we go into greater detail on the unique characteristics of each type of metal stamping die. There are some types of stamping parts processing methods often used for such as bearing seat stamping die, caster stamping die and so on.        The Important Function of Metal Stamping Dies    In this technologically evolving world, there is always something new to look forward to and we are used to look for something new and interesting. The industries that are in the forefront of innovation still rely on precision metal stamping companies to design, develop, and ship them with the needed structure to add more hardware and software to it. But what is that one thing which is most important for a metal stamping company? Well, it is the metal stamping dies. The sheet metal stamping dies are a heart and soul of a company to function smoothly and in most cases, there is a dedicated team to handle this area.        The role metal stamping dies play?    Metal stamping dies are heart and soul of manufacturing industries. These are crucial and efficient in cutting and shaping the metal in given shape. Dies are designed and customized to the item being stamped. These are used for stamping as simple as clips to the most complex pieces that used in the advanced technology. As a result, the manufacturing industries make use of metal stamping dies in maximum production needs in order to get efficient and cost effective results.        How do the dies actually work?    The basic operation of dies are blanking, drawing, shearing, and bending. The precision die and stamping or a tool has specifically designed metal cavity on which the metal sheet is placed and this gives a preferred shape and design to the sheet. In this setting, upper part of the sheet metal stamping dies are connected to the press slide, and the lower part is connected to the press bed. Punch is one specific component that pushes the metal sheet through the die and in this way it performs the actual shaping function. On the dies, the pattern can be used to give a three dimensional lettering or embossing the name of final product as well. In this way, the metal stamping dies become heart and soul of metal stamping machines.        With stamping method, many moulds can be made, like LPG cylinder mould, safety shoes steel header molud, fire extinguisher mould, oxygen cylinder cap, anchor rod tray mould, water heater inner tank mould, etc.

Дата Публикации: 06-07-22

china-woodmoulding.com

Описание:  china-woodmoulding.com Unless you've undergone a major remodel, chances are you've never given much thought to baseboards. Today, we're tackling baseboards: an often overlooked design detail that, as it turns out, plays a big role in protecting walls and making rooms feel polished. Fortunately, architect James Dixon (a member of the Remodelista Architect & Designer Directory, whose firm specializes in restoring Manhattan apartments and building country houses) is only too happy to keep exploring "the wonderful history of moldings" with us. What are baseboards? Baseboards are installed partly for aesthetic reasons: Just as crown molding hides the area where walls meet the ceiling, baseboards hide the joint where walls meet the floor, which might otherwise be unsightly. But baseboards also serve a very necessary function in protecting plaster walls from getting kicked or scuffed by shoes, boots, and vacuum attachments. Should baseboards look like the other molding in the room? Dixon says there are many arcane rules behind choosing and installing molding. In general, however, the design should tie in with the room's other trim. "All the trim should be part of the same family, with similar detail and proportions," he says. "While I love an 18-inch-high, elaborately carved baseboard, it won't feel right in a tiny room with a low ceiling." Baseboard trim is usually much less ornate than crown molding, though in modern houses both can be starkly simple. Remember that more streamlined molding will collect less dust and dirt. And since baseboards are adjacent to the floor, you need to make sure the two materials work together in terms of color and texture. Another indispensible part for your house except for the baseboard is door jamb. With the invention of the door came a new and beloved part of humanity – privacy. Though interaction is an essential part of every civilization, so too is the need for time alone, an area to call one's own. The door was the perfect way to ensure that was possible. However, a door cannot stand on its own. It requires support. That comes in the form of a door jamb. Often overlooked, ignored, or underappreciated, the door jamb plays a very important role in every home. Leveling and Support. The primary purpose of the door jambs, and the door frame as a whole, is to provide a lasting support for the door. When hung, the door relies on this framing. The door jambs and other components of the frame are installed with care to ensure that the door hangs level to the floor. If this is not done properly, the door would hang uneven or crooked. This may result in several different problems. The door may not swing open and closed smoothly. It could leave spaces unfilled, even when closed, which decreased the efficiency of the home. For these reasons, and many others, the door jambs must be hung properly and provide a tough resilience, so the door continues to function at its best. Except for what mentioned above, there are also some other shutter components many used in the decoration of the house, such as trim board, door casing and quarter round. And of course these materials require some moulding methods like wood moulding, crown moulding, pine moulding, finger jointed moulding and so on to install.  

Дата Публикации: 06-07-22

autopartsxdl.com

Описание:  autopartsxdl.com Gaskets are everywhere. They're in your car, at work, even in the air! A gasket is a common term used to describe any seal or grommet that holds two things together. You can make gaskets from rubber, plastic, metal, and other materials. The material choice depends on why you need to use a gasket. But as you'll learn, there's more to gaskets than a seal preventing a leak. Before you blow a gasket trying to work out the difference between each one, let us do the dirty work for you and tell you everything you need to know about gaskets! Definition of a Gasket A gasket, also known as an O-ring or washer, seals the gap between two surfaces. In most cases, these items are made of rubber and are available in a variety of sizes and shapes depending on their purpose. The most common type of gasket is the flat gasket. It has a cross-section that is circular in shape. The diameter of cylindrical gaskets ranges from 1/4 inch to 3 inches. Typically, the diameter of cylindrical gaskets is round. The tubular gasket appears as a long tube with a different diameter at each end. How Are Gaskets Tested? As part of the process of evaluation, gaskets undergo tests such as hot compression tests. This test determines the heat that the gasket can withstand without causing damage or failure in the gasket material. It is then necessary to check for any leaks in the sealant, as well as look for any other problems such as pinholes or cracks with the sealant. As the final stage in the manufacturing process, technicians will conduct an examination of the product, checking it for all aspects before it leaves the facility. >Properties of a Gasket The gasket material should have good flexibility, low density, and high tensile strength. It should also have a resistance to chemicals and internal pressure, and durability. It must also have excellent adhesion properties with itself and anything it touches. The ideal gasket will not only seal but also protect against corrosion. Further abrasion, vibration, impact, and temperature extremes need consideration. That said, the most important feature of any gasket application is strength. It must have enough strength to withstand pressure without deforming under normal conditions. This is so it can serve its primary function of creating a tight seal. Gaskets are the most commonly used in a car, just like our Honda gasket. And they are used in various parts such as Honda VTEC solenoid spool valve gasket, Honda head cylinder solenoid valve gasket, transmission lock-up gasket, etc. 

Дата Публикации: 06-07-22