Abstract: An air/vacuum valve throttling device capable of use with an air/vacuum valve in a piping installation is provided. The throttling device has a body with an interior and a number of ports. A vent/admit port connectable to the air/vacuum valve is provided. An outlet port and an air inlet port are also located in the body. A shaft extends from outside the body into the interior and has a plug connected to an end of the shaft so that the plug is located within the interior of the body. The shaft and plug are constructed and arranged to extend into the outlet port. The plug position is adjustable. A rod is also provided having a plug at one end extending into the interior and a retainer at another end outside the interior. A bushing in the air inlet port having an opening to allow the rod to pass therethrough, and a spring is used for resiliently centering the rod in the air inlet port.

Abstract: An eccentric plug valve and method for assembly wherein the valve utilizes a replaceable valve seat which is placed against a gasket held in a groove about a rim of a valve opening within the valve body and the valve seat is held in position by means to fasten one side of the insert to the valve body and by a groove in the bottom of the valve cavity and a cam ledge on a valve cover which engage the bottom and top edges of the insert, respectively.

Abstract: An eccentric plug valve and method for assembly wherein the valve utilizes a replaceable valve set which is placed against a gasket held in a groove about a rim of a valve opening within the valve body and the valve seat is held in position by means to fasten one side of the insert to the valve body and by a groove in the bottom of the valve cavity and a cam ledge on a valve cover which engage the bottom and top edges of the insert, respectively.

Abstract: An anti-cavitation arrangement for a rotary valve including a conduit by-passing the valve passage and connecting the upstream end to the downstream end of the valve passage. A normally closed pressure controlled or manual valve is disposed in the conduit and is open upon sensing a vacuum on the downstream end of the valve or by manual means so that process fluid is free to flow into the vacuum and thereby prevent cavitation.

Abstract: An improved post assembly for operating an inaccessible valve having upper and lower connecting shaft portions within respective upper and lower column sections wherein each of the shaft portions and column sections are connected by breakaway means enabling the parts to be separated by impact, and replaceable, at a level above grade, and also having an attachment between the lower connecting shaft and a valve shaft.

Abstract: A post assembly for a remotely placed valve and valve actuator includes a post with a hinged cover cap and multiple windows evenly spaced below the cap and a target axially movable past said windows on an operating stem fully contained within the post and with the operating nut on said stem below the cover cap and substantially within the target.