Working Principle
The flowmeter consists of a float inside a conical tube.
The rising flow pushes the float to an equilibrium point.
The area obtained between the float and the orifice is
proportional to the flow rate.
This type of measuring principle is known as variable
area.
The equilibrium point depends on :
The float weight
:
Pf
The fluid thrust :
E
The free flow area :
Al
The area proportional to the flow rate will be:
Al = Ac - Af
where:
Ac = Flow measuring tube area
Af = Float area
Each position of the float corresponds to a flow rate
indicated on the scale printed on measuring tube.
Reading
line (see
page
3)
2
n.
Part
Materials
1
Body
EN 1.4404
2
M. Tube clamp
EN 1.4404
3
O-ring
NBR
4
End gasket
NBR
5
Top spring
EN 1.4401
6
Float
EN 1.4404 /
Glass / Ceramic /
Hostalen
7
Measuring Tube
Borosilicate Glass
8
Bottom spring
EN 1.4401
9
Transparent
protection
Metacryilate
10
Screw
Nylon ®
