矿物冶金-6

What Does Gate Valve Mean? A gate valve  has a flat closure element that slides into the flow stream to stop the fluid. They are one of the most commonly used valves, and are primarily used to permit or prevent the flow of liquids. Gate valve, also called gate valve, is a widely used valve. Its closing principle is that the sealing surface of the gate and the sealing surface of the valve seat are highly smooth, flat and consistent, and fit each other, which can prevent the medium from flowing through, and rely on the top mold, spring or the mold shape of the gate to enhance the sealing effect. It mainly plays a cutting role in the pipeline. Its advantages are: small fluid resistance, easy opening and closing, can be used in the case of two-way flow of medium, no directionality, sealing surface is not easy to be eroded when fully open, short structure length, not only suitable for small valves, but also suitable for big valve. Gate valves  can be used in demanding environments such as h

  This article will give an in-depth discussion on expanded metal. What is Expanded Metal? Expanded metal is a sheet metal mesh. It is made by stretching a slitted sheet of malleable metal. The orientation of the slits is perpendicular to the direction of the stretch. The result of such stretching is an array of holes on the slits – to give a mesh form.   The concept emanates from the idea that metals change size – expand and contract – when subjected to various conditions. The most natural of these changes arises from the chemistry of these metals and the behavior of their atoms. This brings about the development of expanded metal.   Expanded metal is distinct from, and competes with, the following:   l  Perforated Sheet Perforation is the punching of holes, in this case, into a metal sheet. The result of such perforation is a (metal) perforated sheet. In many cases, sheets that can be perforated can also be expanded. Perforation is a subtractive process – the punching of holes implie

  1. Price It mainly refers to the price of raw materials, base steel or cold rolled sheet components supplied by suppliers. The price of raw materials determines the price of  color coated coils  and the input-output ratio of the entire supply chain, which results in profit margins for producers and sellers. A certain degree of influence.   2. Quality First, confirm all the details of the order, including thickness, width, color, packaging, roll weight, etc., as well as the application environment of the selected raw material.PPGI's quick and easy testing methods are: machines to test paint thickness and coil thickness and width, T-bend to test paint adhesion, and testing zinc layer. Or you can make an appointment with a professional testing agency such as SGS for sampling to better define product quality.   Coating hardness The coating hardness is the ability of the coating to resist scratch, abrasion, impact, press and other mechanical functions, which is closely to the scratch

  Industrial wire mesh  is often used in many different industries. Metal wires are woven or sintered to form wire mesh discs, also known as strainers or filter discs. Wire mesh discs are particularly suitable in a variety of mesh-making industries as they are available in a wide range of gauges, different alloys, and a wide range of sizes. Metal alloys used to manufacture wire mesh discs include galvanized steel mesh, stainless steel, aluminum, brass, bronze, and many more.   In-line filters, internal ducts, pipes, conduits, and various other filtration applications are all possible  uses for wire mesh discs . It is made from sintered sheet metal or stainless steel is woven wire mesh fabric. Spot welded together to form a circular frame or specific shape. Edges and frames may or may not be included in the supply. The pharmaceutical, mining, water treatment, food and beverage, and gas and oil industries are five industries where wire mesh trays are frequently used. Filter Discs and Pac

  Window screens are essentially made of gauze, but this material is also divided into many types. When buying, the owner is also faced with a choice. What kind of material is good for the window screen? In order to ensure that you can buy the right  window screen , you also need to pay attention to the skills when purchasing. It is very important to grasp the good skills. However, what are the purchasing skills of the window screen? 1. What material is good for the window screen? 1. Textiles Textile window screens are basically made of chemical fiber, which is a very thin cloth or a thin layer of yarn. The material of textile window screen is relatively light. It is usually matched with curtain cloth, which makes people look like nothing, very hazy and romantic. Textile window screen materials can be divided into fiber, fabric, hemp and other types. However, from the perspective of its production process, the material of the window screen can be divided into dyeing and jacquard. So ma

Companies in the metal processing industry have been looking for suppliers to sell different types of   aluminum ingots   or plates: this is an important product used in many markets. This is due to the characteristics of the product which can be easily molded into a variety of shapes and processed into different thicknesses; in addition it also has excellent anti-corrosion performance and significant resistance to external pressure and environmental factors. Because of these characteristics, aluminum sheet can be used in many terminal industries such as packaging, construction and construction.     Aluminum is used in facades, roofs and walls, doors and windows, stairs, railings, shelves and several other applications. Because of its characteristics, aluminum provides many benefits to the construction industry:   Durability Aluminum alloy for construction is water-resistant, corrosion-resistant and free from the harmful effects of ultraviolet light, thus ensuring durability. The alumi

  Crimped wire mesh   is the most versatile and useful industrial product that is produced by interlinking several strands of metal wire made out of brass, copper, aluminum, carbon steel, bronze, titanium, pre-galvanized steel, or stainless steel. Today's crimped wire mesh manufacturers design many styles of crimped wire mesh depending on the wire diameter, type of material, and the opening size of the raw material. These crimped wire meshes are designed in one of two ways. Plain Woven or Direct Woven  - this is a manufacturing method in which the wire is automatically formed into its shape and form during the weaving process. The plain-woven Crimped Wire Mesh is widely used in applications where small openings are required, such as window screens. Pre-Curled Woven  - In this process, individual wire is curled and shaped prior to the weaving operation. The pre-crimped wire is used to weave and produce a final product with openings up to 8 inches.  Double Crimp Plain Weave Screen Di