Combustion engine exhaust-return valve - has housing formed in return pipe end and pipe contracted to form seat adjacent to lateral outlet

摘要

The valve housing is formed by an end section (7b) of the return pipe (7) itself. The end section is contracted without removing metal to form the seat (2). The section of pipe (9) supporting the diaphragm housing (3) is formed by this part of the return pipe, and incorporates a lateral outlet (14), to which the connecting pipe (16) leading to the engine intake is soldered. There can be a collar (15) formed around the outlet and inside of which the connection pipe (16) is soldered. ADVANTAGE - Simple, compact, light in weight and easy to install.