Abstract: A tubular connector, such as used with a liquid sight monitor, having a plurality of internal deformable ridges for bearing against the external surface of the tube of the monitor. Hence, it accommodates to a range of sizes and irregular tube shapes. The connector is made of a material that in a thick dimension is not deformable, but in a small dimension is deformable, such is Teflon FEP. The body is thick enough to be rigid, whereas the ridges are complaint, more so in a direction toward the mounting end of the connector or end of the tube. Pressure leakage form the liquid system to which the sight monitor is attached increases the pressure seal of the ridges with respect to the surface of the tube. Concentric tube sight monitors are connected to their systems using a connector having, in addition to the set of ridges for accommodating to the internal tube in the manner just described, a second set of ridges for conforming to an external tube.

Abstract: A combination shut off and check valve is disclosed in which the shut off valve function is provided by a manipulable ball closure. A loose ball is contained in a chamber upstream of the ball closure. A seat for the loose ball is provided at the downstream end of this chamber and is located either on the ball closure or on the downstream opening of the chamber. The loose ball will not seat itself ordinarily because the chamber is sufficiently large so as to cause the center of the loose ball to be below the central axis of the ball closure flow hole. A pressure differential in the downstream direction causes the loose ball to roll up an inclined ramp leading to the seat, where it seats in check valve fashion.

Abstract: A combination shut off and check valve is disclosed in which the shut off valve function is provided by a manipulable ball closure. The ball closure includes a seat in its flow hole on its upstream side for accepting a loose ball included in a chamber upstream of the ball closure. The loose ball will not seat itself ordinarily because the chamber is sufficiently large so as to cause the center of the loose ball to be below the central axis of the ball closure flow hole. A pressure differential in the downstream direction causes the loose ball to roll up an inclined ramp leading to the flow hole, where it seats in check valve fashion.