Chemical valve selection principle

Chemical valves Overview: Chemical valves are an important accessory for fluid control in industrial pipelines. Faced with complex industrial systems and a wide variety of valve operating conditions, you want to choose the right valve for the pipe system and you should understand the performance of the valve , Two should choose the steps and basis for choosing the valve, three should follow the principle of choosing the valve of petroleum and chemical industry. Chemical valve is not only applicable to a wide range, but also the amount of more, of course, chemical valves than the average valve to be higher. Chemical valves generally use the media are relatively easy to corrosion, a simple chlor-alkali industry, to large-scale petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, wear resistance, great temperature pressure difference. The face of such a higher risk of the valve, the selection and use of the process should be strictly in accordance with the implementation of chemical standards. Taichen company is a professional manufacturer of chemical valves, manufactured in strict accordance with the Ministry of Chemical Industry standards. Chemical valve selection principle: The chemical industry generally chooses the flow channel as a straight-through valve, the flow resistance is small, usually choose as the cut-off and open media valve, easy to regulate the flow of the valve as a control flow, plug and ball valve more applicable In the diverting shunt, the sliding member along the sealing surface sliding with a wiper valve is most suitable for medium with suspended particles. Common chemical valves are ball valves, gate valves, globe valves, safety valves, plug valves, check valves and so on. Chemical valve with the mainstream of chemical substances, including acid-base corrosion of a wide range of media, the main chemical manufacturers in Taiwan Chen led 304L and 316-based materials, 304 as the common medium as the leading material, a variety of chemicals with corrosive fluid alloy steel or Lined fluorine valve. Chemical type of valve role: Opening and closing type: cut off or communicate the flow of fluid within the tube; Regulation type: regulate the flow of the tube, the flow rate; Throttle: the fluid through the valve after a great pressure drop; Other types: a. b. to maintain a certain pressure c. steam drainage. Chemical valve before use Note: ① the valve body inside and outside the surface with or without blisters, cracks and other defects; ② seat and valve body is solid, the valve plug and valve seat is consistent, sealing surface without defects; ③ stem and valve core The connection is flexible and reliable, the valve stem is bent, the thread is damaged or not; Steel Flange Chemical Standards: Chemical Engineering Construction Technical Specifications 【HGJ44-HGJ68-1999】 Ministry of Chemical Industry standards; European system 【HG20592-HG20605-1997】 Chemical Department standard; European system 【HG20613-HG20623-1997】

Zinc Alloy Die Castings

Zinc alloy die castings parts are widely used in Automotive, lamp shade power tools, household appliances and various accessories.

The features of Zinc alloy die castings are as follows:

1). High Density;
2)Good Casting performance, complex shapes can be die-casting, precision parts, thin-walled castings smooth surface.
3). Good surface after finish surface finished, such as: chrome plated, spray, spray paint.
4) Melting and die-casting iron absorption, pressure-type non-corrosive, non-stick mold.
5) has good mechanical properties at room temperature and abrasion resistance.
6)Low melting point, melting at 385°C easily die casting.


More about Zinc Alloy Die Castings

Zinc Alloy Die Castings have a good surface roughness, strength and elongation, Which are widely used in a variety of ornaments, such as furniture, accessories, door handle ,architectural decoration, bathroom accessories, lighting parts, toys, tie clips, belt buckles, various metal buckle and so on,they are required a good surface treatment performance. The traditional zinc alloy die-casting material are Zamak 2,3,5,7, the Zamak 3 is the most widely used in different industries,



Zamak 3: Zinc Alloy Die Casting have a good fluidity and mechanical properties. Used in casting of low mechanical strength, such as toys, lamps, decorations, some electrical parts.

Zamak 5: Zinc Alloy Die Casting have a good mobility and good mechanical properties. Applied to certain requirements of the mechanical strength of castings, such as auto parts, electrical and mechanical parts, mechanical parts, electrical components.



Zamak 2: Zinc Alloy Die Casting have a there are special requirements for mechanical properties, hardness, wear resistance, dimensional accuracy requirements of the mechanical parts

ZA8: Zinc Alloy Die Casting have a good flowability and dimensional stability, but less liquid. Used in die casting, small size, accuracy and mechanical strength demanding workpieces, such as electrical appliances.Superloy: the best mobility, applied to the die-casting thin-walled, large-size, high precision, complex shape of the workpiece, such as electrical components of the box.

Different zinc alloys have different physical and mechanical properties, such as die casting design provides room for choice. The same time, the choice of the zinc alloy is more important to select what kind of zinc alloy, mainly from three aspects to consider.



1,Zinc Alloy Die Castings have their own purposes, need to meet the performance requirements.
(1) mechanical properties, tensile strength, when the material fracture resistance;Elongation, brittleness and plasticity of the measure;Hardness is the resistance of the material surface is pressed into a hard object or friction caused by plastic deformation.
(2) state of the working environment: temperature, humidity, media contact with the workpiece and air tightness requirements.
(3) precision: accuracy and dimensional stability can be achieved.

2,process performance of Zinc Alloy Die Castings:
(1) casting process;
(2) mechanical processes;
(3) surface treatment.

3, Economic good: the cost of raw materials and production equipment requirements (including smelting equipment, die casting machine, mold, etc.), as well as production costs.

Zinc Alloy Die Castings

Zinc Alloy Die Casting, Die Casting Zinc Alloy, Zinc Alloy Die Casting Parts

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