● These are metal fittings used for joining two lengths of hose together or a hose to an apparatus or vice versa.
● These are fitted to either end of the hose lengths used for suction or delivery purposes.
● All couplings are always a pair of two pieces.
● One is called the “male” and the other a “female”.
● Instantaneous couplings are now standard in India for delivery hose and pump outlets whereas “threaded couplings are used on suction hose and pump inlets.
● Instantaneous couplings are provided with the spring loaded lugs with the help of which the hoses can be snapped on and off in an instant.
● These are provided with the swiveling action for running the coils.
1) THREADED:
● the coupling is provided with threads to lock male cooling to female coupling.
2) INTERLOCKING:
● the coupling is provided spring lock in female coupling.
● just push the male coupling in to the female coupling it will automatically locked by spring loaded locks.
3) MALE – FEMALE COUPLING:
● Male Coupling:
● Serrated Tail
● Lip
● Flange
● Female Coupling:
● Serrated Tail
● Two hollow lugs
● Spring loaded plunger with cam shaped tooth
● Stop nut
● Cap
● Metal Disc
● Spring
● Washer
