Butterfly pneumatic valve installation and maintenance should be paid attention to the following 3)

butterfly pneumatic valve installation and maintenance should be paid attention to the following:. In the process of installation, pneumatic valve in the closed position. 。 Open position to the disc rotation should be determined. 。 With a side vent valve the pneumatic butterfly valve, open the ventilation should be taken before acting valve open. 。 Should the manufacturer's installation instructions for installation, the weight of a big butterfly, set up a solid foundation. First of all, the stem axis, the disc center, and in the same place the center of the body structure of concentric butterfly pneumatic valve. Simple structure, convenient. Line with rubber butterfly pneumatic valve is a common this category. Defect is due to the disc seat in compression, scraping, always from a big resistance, wear and tear. Secondly, to solve a single eccentric butterfly pneumatic butterfly valve seat concentric pneumatic valve and extrusion disc problem, the single eccentric butterfly pneumatic valve, for stem axis deviation from the center of the disc structure, so that the client is not up and down the butterfly another axis of rotation, dispersion, thus reducing on the degree of disc and seat at the bottom of the compression. Third, in a double eccentric butterfly pneumatic valve eccentric butterfly valve forms the basis for further improvement is one of the most widely used double eccentric butterfly pneumatic valve. Its structure both in the stem axis deviation from the center of the disc, but also off the body's centre of gravity. The effect of double eccentric pneumatic valve plate can immediately close the pneumatic valve seat, greatly eliminates unnecessary pneumatic seat discs and excessive compression, scratches phenomenon, reduce the resistance from the public, reduce wear and improve the seat life. Four, three eccentric butterfly pneumatic valve high temperature, you must use a seal, but leakage; Zero leakage, must use the soft seal, but not resistant to high temperature. Double eccentric butterfly pneumatic valve, in order to overcome this contradiction, but also for the third time eccentric butterfly pneumatic valve. Butterfly disc pneumatic valve is used to open and close to the stem, to open, close and adjust the pneumatic valve fluid channels. Butterfly pneumatic valve not only in structure, small volume, light weight, material consumption, installation size is small, simple drive torque is small, the operation is simple, rapid, at the same time with. Regulatory good flow characteristics and the blockade, in large and medium caliber, depression areas use, butterfly pneumatic valve is the dominant form. Because of synthetic rubber and ptfe anti-corrosion applications, improve the performance of the pneumatic valve adjustment, and satisfy different working conditions. Over the past decade, the metal seal high temperature, low temperature control pneumatic valve has developed rapidly, corrosion resistance, high corrosion resistance, high strength alloy material of butterfly application, metal sealing at high temperature, low temperature, strong corrosion and other working condition adjustment pneumatic valve is widely used, and parts replaced by the pneumatic valve, pneumatic brake pneumatic valve and the ball valve. Features: butterfly pneumatic valve has simple structure, small volume, light weight, material consumption province, compact installation, quick switch, ° reciprocating rotation, torque, truncation connection, the characteristics of the other small, adjust the median line, and a close the fluid flow control characteristics and good sealing performance. Nominal pressure or stress, PN. Such as - 。 MPa, ANSI class - 磅,JIS - Nominal size of the K or caliber: DN? Connection: flange, chip connection, welding connection and applicable temperature Lu Gejing circle: - ℃? ℃ drive mode: manual, worm gear, pneumatic, electric, hydraulic, pneumatic, hydraulic, electric hydraulic linkage pneumatic valve body material: steel lining, water bureau, ZGCrNiTi ZGCrNiMoTi, CF ( ) , CF ( L stainless steel) CFM ( ) CFM ( ) And titanium.
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