China gas pipe with polyethylene balls structure principle of the pneumatic valve (2)

Overview



the underground gas pipe network system in cities, polyethylene ( PE） The application of pipeline more and more. Simple as life, and performance, welding, sealed performance is good, easy to use polyethylene pipe pneumatic valve ball is indispensable, because more and more components and use pay attention to control.
material selection
polyethylene is a thermoplastic engineering plastics, has a certain strength, stiffness, toughness, impact resistance, corrosion resistance and abrasion resistance. By controlling the polymerization process and add a certain amount of monomer polymerization, can adjust or improve the performance of polyethylene material. Therefore, advanced in the process of polymerization or in a direct result of the material performance differences. For long piping system, gas pipes, pipe fittings and the safe operation of pneumatic valve, pipe according to the classification of materials is special material, PE easy to PE) And mixed component types, cannot use masterbatch. The material color is black and yellow. Types and structures,
polyethylene gas pneumatic valve with pneumatic valve is generally divided into small polyethylene pneumatic valve ( SD) Pneumatic valve and large polyethylene ( With SD SD or above) 。 No small polyethylene pneumatic valves are open, large polyethylene pneumatic valve can not according to need, set up a set or two elution mouth. Features ( ) Corrosion resistance. Polyethylene is an inert material, with a few strong oxidizer, resistance to a variety of chemical media. Electrochemical no corrosion, no coating. （ ) No leakage. Polyethylene pipe pneumatic valve and welding ( Hot melt connection or fused connection) , the width of the welding joint connection at the end of the main sealing performance. Compared to rubber ring or other mechanical joint, joint type connector there is no risk of distortion due to external leakage. （ ) High toughness. Polyethylene is a kind of high toughness material, on the basis of the elongation at break more than %, management ability, to adapt to the uneven settlement is very strong. Is a good seismic performance of pipeline. （ ) Life is long. Polyethylene material that can be used more than years, this is the tensile strength of the foreign polyethylene pipe ring on the long-term value of hydraulic design basis ( Group housing) Sure is approved in accordance with international standards based. （ ) To promote the construction. Polyethylene pneumatic valves, the weight light metal pneumatic valve, easy to install. Open and shut easily, the operating torque is small. For the whole caliber of pneumatic valves, pressure loss.
, the application of high pressure polyethylene pipe should be set in the points and polyethylene pneumatic valve pneumatic valve should be managed by elution on both sides. High pressure polyethylene gas GuanKe starting point should be in polyethylene pneumatic valve, set the diffuse unilateral control. PE pneumatic ball valve is mainly density polyethylene pipe buried in package, cut off all gas and media stream. The pneumatic valve can be buried in the ground, need to install a simple sheath, the seat for the opening and closing ceremony of the accessories, you can use a special wrench for ground operations on the opening and closing ceremonies, polyethylene as media ball pneumatic valve in accordance with the national standard of gas purification, artificial gas and liquefied petroleum gas (LPG).
6, conclusion PE pneumatic ball valve opening and torque, pneumatic valve no corrosion, no need for maintenance and repairs, years of service life, improve the integrity of the closing the polyethylene pipe network system. The integral style of the body, eliminating the leak, polyethylene, polyethylene and the possibility of connecting pipe, there is no need to set the pneumatic valve well, underground construction, the body can use a pipe welding or electrical connections at the end of the butt welding method, pneumatic valve, generally about times than the traditional metal ball ground opening and closing operation of the economic benefit. Polyethylene pipe with excellent performance for further research and development of polyethylene pipes and polyethylene materials, pneumatic valve has better application.