Large flow capacity control valve through valve general, greater than 12 inches, larger than 24-inch ball valve and a greater than 48-inch butterfly valve belongs to the category of special valves. When the valve size increase in arithmetic progression, the valve in the closed withstand static pressure load will increase geometrically. Therefore, the strength of the shaft, the bearing load, unbalanced force and implementing agencies can provide thrust will increase with the valve caliber becomes more important. Commonly used to reduce the large valve maximum allowable pressure drop requirements for designing and implementing agencies kept within reasonable limits. Even at the lower pressure level, some of the large flow valve flow capacity is amazing.
In all large flow valve installations, the noise level must be carefully considered, because the sound pressure level and flow magnitude increase in direct proportion. In order to keep noise generated by the valve within the allowable range, has launched several large cast or fabricated valve type. Valve body usually cage structure, particularly long spool stroke through the cage wall a large number of small openings, as well as extended export pipeline connector, to reduce the fluid velocity and minimize noise output . Strict in large flow applications, the requirements for implementing agencies, typically, the choice of a long stroke, double-acting cylinder actuator. Actual size and weight of the valve and actuator components makes installation and maintenance process becomes very complicated. The valve to the pipeline as well as the removal and replacement of major trim parts require heavy cranes. Maintenance personnel must be in strict accordance with the manufacturer's operating manual in order to reduce the possibility of injury to a minimum.
Article explains:
Paper series site or of self-publish, the site post aims to deliver more information to the visitor.
2, involving work content, copyright and other issues, please contact site within 30 days, we will be the first time to make appropriate treatment! About copyright issues, please contact: 13515194999
3, Zhuanzhai this article please indicate from: Jiangyin City Oulei Si valve valve repair factory www.olschina.com
4 other links:
Valve repair valve repair valve repair equipment valve grinding machine imported valve repair power station valve repair control valve maintenance |
