This invention relates to a controlled discharge flapper valve comprising of a body accommodating flapper and shaft in connection with an actuator inside protection box to avoid any damage wherein the shaft is in connection with the flapper.

This invention relates to an automatic bottle ejector system used with biological waste treatment system for railway passenger coaches comprising of a chamber provided with a flapper valve and atleast two openings wherein one opening is connected to biological tank and other opening is in communication with a chute,...