Abstract: A compact expanding gate valve having a valve body defining a flowway and having spaced internal seat rings. Guide elements project internally from the valve body. A valve stem driven gate and segment assembly is movable within the valve body between open and closed positions relative to the seat rings and has control arms mounted by actuating pins to each side of gate and segment members of the gate and segment assembly. The control arms are movable linearly with the gate and segment assembly and are disposed in guided relation with the guide elements during opening and closing movement.

Abstract: A lift-turn valve and actuator mechanism incorporating a valve plug and slip assembly that is movable with both axial and rotatable components of movement during opening and closing. Rotational movement is accomplished during lifting by cooperative relationship between opposed cam grooves defined in valve stem means and a pair of opposed rotatable cam follower elements that are supported by an actuator housing. The actuator housing is a fabricated structure incorporating threaded structure for receiving replaceable cam follower bearing mechanisms. The cam follower elements cooperate with the opposed cam grooves to provide efficient balanced force transfer through the valve actuator mechanism.

Abstract: Apparatus comprising an interchange which receives a sphere from a meter prover loop after a meter prover run and which launches the sphere into the loop to commence a run. An assembly within the body of the interchange is movable between sphere receiving and sphere launching positions. When in sphere launching position it provides a seal which prevents flow through the interchange. Means is incorporated which prevents hydraulic shock when the assembly is moved from sphere receiving to sphere launching position. Also the apparatus has improved means for detecting leakage.

Abstract: An assembly of pipes and flow control means (e.g., valves) carried by a supporting frame (e.g., a skid) and forming a modular unit for field assembly of flow distributing or diverting systems of the type used in the petroleum industry in connection with tank farms. The piping of each assembly unit has ends for coupling with associated piping and like associated assembly units, with the ends disposed in vertical planes that are coincident with the corresponding sides of the frame, thereby facilitating field assembly of the units to form a desired overall system.