Flow regulation valve

Abstract

A flow regulating valve comprises a casing 1; a tube 10 which has elasticity and the both ends thereof are opened to an exterior, and is inserted and installed in the casing 1; and a pushing member 20 which changes an area of an aperture of the tube 10. The tube 10 has a double layered structure which is composed by unifying an inner tube 11 which is made of tetrafluoroethylene and an outer tube 12 which is made of teflon™ by adhesives. Furthermore, the pushing member 20 has diaphragms 21 and 22 provided in the casing so as to face with the tube 10, and a fluid pressure supplying portion 23 which moves the diaphragms to the tube side by supplying fluid pressure to one of surfaces of the diaphragms 21 and 22.

Dependencies are inferred from the claim text.