Jet air chimney pipe
A steam injector is typically used to deliver cold water to a boiler against its own pressure using its own live or exhaust steam, replacing any mechanical pump . This was the purpose for which it was originally invented in 1858 by Henri Giffard . Its operation was from the start intriguing since it seemed paradoxical, almost like perpetual motion, but its operation was later explained using thermodynamics .  Other types of injector may use other pressurised motive fluids such as air.
Depending on the application, an injector can also take the form of an eductor-jet pump , a water eductor or an aspirator . An ejector operates on similar principles to create a vacuum feed connection for braking systems etc..
The injector was invented by Henri Giffard for the steam locomotive  and patented in the United Kingdom by Messrs Sharp Stewart & Co. of Glasgow .
The professionals who represent PrimeLine Products, Inc., bring an extensive background in trenchless pipeline and concrete rehabilitation. Our team of professionals has the ability to understand the needs, expectations and technical requirements of our customers and know well the requirements of our industry and of our customers and vendors.
PrimeLine uses an engineered composite made of felt tube and silicate-based or epoxy ambient cure resin to invert a liner into the lateral from the property line or cleanout to the connection with the sewer line, forming a “pipe within a pipe” to effectively repair broken pipe, leaking joints and other infiltrating defects in the lateral pipe.
PrimeLine Products Inc., is a national distributor of virtually any type of underground product you may need including plugs, deflection gauges, air testing equipment and accessories. We feature products manufactured by Cherne Industries, Inc.
An air door or air curtain is a device used to prevent air or contaminants from moving from one open space to another. The most common use is a downward-facing blower fan mounted over an entrance to a building , or an opening between two spaces conditioned at different temperatures.
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space. It reduces penetration of insects and unconditioned air into a conditioned space by forcing an air stream over the entire entrance. The air stream layer moves with a velocity and angle such that any air that tries to penetrate the curtain is entrained. Air curtain effectiveness in preventing infiltration through an entrance generally ranges from 60 to 80%". 
The Air Movement and Control Association defines an air curtain as: "A directionally-controlled airstream, moving across the entire height and width of an opening, which reduces the infiltration or transfer of air from one side of the opening to the other and/or inhibits flying insects, dust or debris from passing through".