An orifice is an opening made in the side or bottom of tank, having a closed perimeter,

through which the fluid may be discharged. A mouthpiece is short tube fitted to a same size

circular opening provided in a tank so that fluid may be discharged through it. Orifice and

mouthpiece are used to measure the rate of flow of liquid. The apparatus is designed to

measure the co-efficient of discharge of orifice & mouthpiece.

The apparatus consists of a supply tank, at the side of which a universal fixture for mounting

orifice or mouthpiece is attached. A centrifugal pump supplied the water to supply tank. Head

over the orifice/mouthpiece is controlled by a by pass valve provided at pump discharge. A

measuring tank is provided to measure the discharge. A gauge for measuring X and Y coordinates

of jet from the orifice is provided, which is used to calculate Cv of orifice.

SPECIFICATIONS:

l Mouthpiece : (a) LID = 4 (b) L/D = 1 © Bordas

l Flow surface : 2 mtrs. X 1 mtr. X 1.5 mtrs. height.

l X-Y gauge : for orifice jet co-ordinates.

l Supply Tank : 0.4 X 0.3 X 0.5m height

l Sump tank : suitable capacity.

l Measuring tank : suitable capacity & calibrated water flow meter

l Orifice : 8mm and 10 mm.