| 摘要 |
<p>CHECK VALVE ASSEMBLY A check valve assembly adapted for connection to a high pressure reciprocating pump cylinder, comprising valve body means, inlet check valve means and outlet check valve means. The valve body means has an inlet end adapted for connection to the pump cylinder and an outlet end adapted for connection to a high pressure outlet line. The inlet end has a planar surface adapted to be exposed to the interior of the pump cylinder. The valve body means also includes a low pressure inlet passage opening in the planar surface for providing communication with a source of low pressure fluid and a high pressure outlet passage extending between the planar surface and the outlet end. Such passages are parallel to one another and spaced apart a distance at least as great as the radius of the high pressure outlet passage. The inlet check valve means is mounted entirely on the exposed planar surface in association with the inlet passage and prevents high pressure fluid backflow into the inlet passage. The outlet check valve means is associated with the outlet end and prevents fluid backflow from the outlet line. The outlet check valve means includes a valve seating element removable from the valve assembly for servicing thereof, and an outlet valve element moveable to and from a position in which it abuts the seating element and prevents fluid flow into the outlet passage during low pressure fluid flow through the inlet check valve means into the pump cylinder.</p> |
