Download - 4_Flapper Nozzle System
IPC LAB, Dept. of Chemical Engineering, NITW Page 1
Experiment No - 4
Flapper Nozzle System
IPC LAB, Dept. of Chemical Engineering, NITW Page 2
To study the characteristics of flapper nozzle system.
AIM:
It consists of flapper -nozzle mechanism, Dial gauge indicator, pressure gauges and
air filter regulator. A regulated supply of pressure, usually over 20 psig, provides a source of
air through the restriction. The nozzle is open at the end where the gap exists between the
nozzle and flapper, and air escapes in this region.
DESCRIPTION:
Figure 1: Flapper nozzle system
Application of Flapper nozzle mechanism in I/P converter:
IPC LAB, Dept. of Chemical Engineering, NITW Page 3
1) Adjust the air supply to 20 psig by air regulator.
PRODECURE:
2) Increase the gap between flapper and nozzle to get 3 psi signal pressure and note the dial
reading.
3) Decrease the gap between flapper and nozzle by gap adjusting screw. Note the dial gauge
reading for each psi change in signal pressure. Ensure that supply pressure is maintained at 20
psi.
4) Repeat the set of observation by increasing the gap.
5) Repeat the experiment for supply pressure of 15 psig.
6) Tabulate the readings in the observation table and plot the graph of signal Pressure verses
nozzle gap
MODEL GRAPH:
OBSERVATIONS:
Sr.no Dial gauge reading Nozzle gap (mm)
Change in signal pressure(psi)
ππππππππ π¨π¨π¨π¨ π π π π πππ π π π π π π π πππ¨π¨π§π§π§π§π π π π = πππππππππππ π ππππ π¬π¬πππππππππ π π π π π π π π¬π¬π¬π¬π©π©π π π π
πππ¨π¨π π π π π π π¬π¬π π π¨π¨ππππππππππ πππππππππππ π ππππ πππ¨π¨π§π§π§π§π π π π πππππ π
CALCULATIONS:
CONCLUSIONS:
