Abstract: A fitting assembly for corrugated tubing is provided including a body, an insert, locking means and a bushing. The body includes first connecting means. The locking means includes second connecting means. The insert is sealingly engaged with the body and includes a transition area of increased outside diameter. The bushing includes an inwardly projecting protrusion for engagement with a trough disposed on an external surface of a corrugated tube. The first and second connecting means engage to removably secure the bushing, an end of the corrugated tube and at least a portion of the insert within the body and the locking means to pinch a circumferential section of the corrugated tube between the protrusion and the transition area, and to seal an internal surface of the circumferential section with the transition area.

Abstract: A fitting assembly for corrugated tubing comprising a body having first connecting means; an insert; locking means having second connecting means; and a resilient ring. The insert is sealingly engaged with the body and includes a transition area of increased outside diameter. The locking means includes an internally directed lip; a substantially conical section; and a retainer disposed between the second connecting means and the conical section. The first and second connecting means engage to removably secure the body to the locking means and to slide the ring within the conical section towards the lip forcing the ring to radially contract into a trough of a corrugated tube and sliding the corrugated tube onto the transition area. Further engagement of the first and second connecting means causes the ring to push on and collapse a ridge of the corrugated tube against the transition area creating a seal therebetween.

Abstract: A fitting assembly for forming a fluid-tight seal with an end of a stainless steel tube is provided with an adapter that is composed of a material that is harder than the material that the stainless steel tube is composed of. The adapter may include an insert that is composed of a material that is harder than the material that the stainless steel tube is composed of. The stainless steel tube may be gripped between a bushing that is connected to a nut and an adapter to create the fluid-tight seal.

Abstract: A dual range dynamic pressure differential generator for use at low pressures using a differential over a variable valve for a first stage pressure differential and the differential over a flow accelerator for a second stage pressure differential. The differential over the variable valve is useful for higher pressure differentials while the differential created over the flow accelerator is useful for a lower range pressure differential, although the two ranges may overlap.

Abstract: A dual range dynamic pressure differential generator for use at low pressures using a differential over a variable valve for a first stage pressure differential and the differential over a flow accelerator for a second stage pressure differential. The differential over the variable valve is useful for higher pressure differentials while the differential created over the flow accelerator is useful for a lower range pressure differential, although the two ranges may overlap.

Abstract: A dual range dynamic pressure differential generator for use at low pressures using a differential over a variable valve for a first stage pressure differential and the differential over a flow accelerator for a second stage pressure differential. The differential over the variable valve is useful for higher pressure differentials while the differential created over the flow accelerator is useful for a lower range pressure differential, although the two ranges may overlap.