| 摘要 |
<p>An override check valve comprising a valve housing in which a valve device is located which is made up of a valve member for opening and closing a valve port connecting first and second fluid ducts with each other. A valve closing spring urges the valve member into its closed setting. An operating device is arranged in an operation position of the valve in an upper housing part above the valve device and serves to switch over the valve member between the closed position and open position. An attachment part is arranged in this operation position on a lower part of the housing and serves to attach the valve to a component to be supplied with fluid under pressure, such attachment part having an outlet port in communication with the first duct. A connection part in the operational position is arranged laterally on the housing and has a through passage communicating on the one hand with a source of fluid under pressure or a receiving means therefor and a drain and on the other hand with the second duct, said valve device being arranged over the attachment part between the latter and the operating device, the connection part being generally opposite thereto laterally and the duct connected with the outlet port is divided into two consecutive duct sections, of which one first duct section arranged above the attachment part contains the valve device and the other second duct section adjoining same has a reduced cross section smaller than the first section, is free of any internal component and extends through the attachment part as far as the outlet port.</p> |
