Ball valveThe spheres and their shells are usually made of the following materials:

1. Brass

• Brass is an alloy of copper and zinc and can be distinguished by light yellow to light red depending on the zinc content. It is the most commonly used material for ball valves. Brass is a tough, strong and durable metal that can withstand high temperatures and pressures. Copper in brass alloys has antibacterial properties that inhibit the growth and reproduction of microorganisms on its surface. Brass has good resistance to chemical, corrosion and biological contamination. It is inert to most acids, bases and alkalis, except for solutions with a high chlorine content. Chlorine causes dezincification, a reaction in which chloride ions strip zinc from the alloy, resulting in a porous structure. Dezincification will greatly reduce the strength of the material.

• Brass ball valves are not difficult to manufacture due to their malleability, and are also easy to cast and weld. They are lighter and cheaper than steel ball valves. They are also easy to assemble into piping systems. Common applications for brass ball valves are food, chemical, oil and gas processing and the transportation of gaseous fluids. It can also be safely used to transport drinking water.

2, stainless steel

• Stainless steel is a steel with a high chromium content and a certain amount of nickel. The chromium content of stainless steel gives it excellent corrosion resistance. Stainless steel is known for its outstanding strength, toughness and durability. It also maintains strength at high temperatures and pressures.

• Stainless steel ball valves are usually manufactured in 304 and 316 stainless steel grades. 304 stainless steel contains 18% chromium and 8% nickel, while 316 stainless steel contains 18% chromium and 10% nickel and trace amounts of molybdenum. The combination of nickel and molybdenum makes 316 stainless steel resistant to chloride.

• In some applications, the use of stainless steel ball valves is a good choice. They are used in swimming pools to treat chlorinated water. In harsh industrial environments such as desalination and refineries, they have better resistance to corrosive chemicals at high temperatures and pressures. In the brewery, stainless steel pipes and valves are used to process wort, a reactive liquid extracted during the saccharification process.

3, polyvinyl chloride (PVC)

PVC is a tough, hard and durable plastic material. They are generally less strong than brass and stainless steel alloys, but are cheaper. They are resistant to corrosion and most acid, alkali and salt solutions. However, they are not tolerant to aromatic compounds and hydrocarbons. PVC ball valves have low temperature and pressure ratings up to 150 psi and 140°F, respectively. Applications for PVC ball valves include piping, irrigation and water distribution systems.

Chlorinated PVC (CPVC) is a type of PVC chlorinated by a free radical reaction triggered by ultraviolet light. The chlorination of PVC results in higher temperature resistance. CPVC ball valves can withstand high temperatures up to 200°F.

4, polypropylene ball valve (PP)

PP is a tough, durable, lightweight and flexible thermoplastic made from propylene monomer. It is well tolerated to most acids and bases, but has selective compatibility with organic substances and solvents. Its chemical resistance decreases with increasing temperature. The maximum operating temperature of PP is 82°C. PP ball valves are suitable for regulating the flow of fluids with a wide range of viscosity. They are used as ball valve materials in the manufacture of sugar, fertilizer, chemicals, paper and so on.

5, glass fiber reinforced polypropylene ball valve (GFPP)

In GFPP, glass fibers are reinforced into polypropylene to improve its dimensional stability, stiffness and chemical resistance, and to reduce the thermal expansion coefficient of PP. For 40% of the GFPP, the thermal deformation temperature increases to 150°C at 264 psi. The enhancement of glass fiber in PP improves cost effectiveness and allows it to operate in more demanding and heavy duty applications.

6, polyvinylidene fluoride ball valve (PVDF)

PVDF is a thermoplastic fluoropolymer with high purity, durability and high molecular weight. It is synthesized from gaseous vinylidene fluoride monomer by free radical polymerization process. It also has wear resistance. This material has excellent chemical resistance, making it suitable for handling reactive liquid and gaseous substances such as sulfuric acid, hydrochloric acid, nitric acid, hydrocarbons, fuels as well as aromatic, aliphatic and halogenated solvents. Because of its good biofilm properties, it can resist the growth of microbial films, so it is used as a ball valve material in industries such as water purification, wastewater treatment, and food and pharmaceutical processing. It is also unaffected by exposure to sunlight and ultraviolet rays. The maximum operating temperature of PVDF is about 115°C.

7. Polyethylene (PE)

PE is a durable, flexible, lightweight and most abundant thermoplastic. PE is compatible with most compounds, including strong acids and bases, and some organic compounds, including oils and alcohols. Its increased crystallinity and density make it more resistant to chemical corrosion. PE ball valves are used to treat fluids in many manufacturing processes, as well as water purification and wastewater treatment. The maximum operating temperature of PVDF is about 60°C.

The above content introduces the Bee ball valve structural materials have what problems. In addition, Shenzhen Oudejie Technology specializes in selling new imported Bee ball valves, and promises to sell products are new imported products, while providing our customers with quotation, selection, product information and other services.