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Variable Area
Flowmeter
instrumentation
for fluids
Series
2100 / 2150 / 2300 / 2340
Instructions Manual
C-MI-01 Rev.:2 English version
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Technical characteristics
• Precision according to VDE/VDI 3513:
- 2100 ± 4% f. s. value Class 4
- 2150 ± 2,5% f. s. value Class 2,5
- 2300/2340 ± 1,6% f. s. value Class 1,6
• Standard Scales:
- Water in l/h.
- Air in Nl/h up to 700 Nl/h.
- Air in Nm³/h from 1 to 17 Nm³/h.
(on demand in l/s, cc/min, %.)
• Mounting: Vertical (rising fluid).
• Fittings:
- 2100/2150/2300 Rp 1/4” (BSP) or 1/4” NPT
- 2340 Rp 1/2”, Rp 3/4” (BSP) or
• Materials:
- Metering tube: Borosilicate Glass
- Fittings: EN 1.4404 (AISI-316L)
- Float: EN 1.4404 (AISI-316L),
Aluminium, Glass, Ceramic
PVC, PVDF, PTFE.
- Valve: EN 1.4404 (AISI-316L)
- Valve seat: PTFE
- Gaskets: NBR (Nitrile Rubber)
( Viton
• Working Pressure: 15 bar max.
• Fluid temperature: 0 ... +120ºC.
• Ambient temperature: 0 ... +80ºC.
Conforms with Directive 97/23/CE
• Optional limit switches:
- 20-AMD
Bi-stable inductive proximity detector, NAMUR
DIN 19234
Conforms with Directive EMC 89/336/EEC
- 20-AMO
Optical limit switch (for clear fluids).
• Power supply:
12 VDC, 24 VDC, 24 VAC,
110 VAC, 230 VAC, 240 VAC.
Conforms with Directive EMC 89/336/EEC
1/2”, 3/4” NPT
®
on demand)
Working Principle
Reading
Line
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 tube 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 metering tube area
Af = Float area
Each position of the float corresponds to a flow
rate indicated on the scale printed on metering
tube.
RECEPTIÓN
The flowmeter is supplied ready for use.
Turning the apparatus carefully upside down, check that the float moves freely.
MOUNTING
The flowmeter must be mounted vertically taking into account that:
The fluid inlet is at the bottom (the low end of the scale).
The fluid outlet is at the top (the high end of the scale).
It is most important that the flowmeter is installed perfectly vertical, given that deviations of the
order of 5-10º from the vertical can produce reading errors of up to 10%.
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G
FLOW RATE READING
The float determines the flow rate
measurement on the scale.
Forma AC
AC Shape ECG Shape
Forma E C
L i nea de l e ct ur a
Reading Line
For the different shapes of floats, the
readings must be taken at the height
shown in the drawing at the right.
CLEANING AND MAINTENANCE
To dismount the metering tube for cleaning proceed as following:
Turn the press (1) clockwise between a half turn and one and a half turns, depending on the
model, to free the metering tube.
Remove the springs or stops (3 & 5) and the float (4). Cleaning should be done using a soft brush
(bottle brush or similar) to avoid scratching the measuring tube.
The float should also be cleaned with a soft brush, never with metallic utensils which could scratch
it’s surface
Next mount the float (4), and then the springs or stops (3 & 5) and then place the gaskets (2 & 6)
well centred in their seatings with the aid of the metering tube.
Centre the metering tube and gently tighten the press (1) anti-clockwise until a seal is obtained.
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WARRANTY
Tecfluid S.A. GUARANTEES ALL ITS PRODUCTS FOR A PERIOD OF 24 MONTHS, after consign-
ment, against all defects in materials and workmanship.
This warranty does not cover failures which can be imputed to misuse, use in an application different
to that specified in the order, the result of service or modifica tion by un-authorized persons, bad
handling or accident.
This warranty is limited to cover the repair o r replac eme nt defectiv e pa rts which have not be en dam aged by misuse.
This warranty is limited to the repair of the equipment and all f urther and eventually follo wing damages are not covered by this warranty.
Any consignment of equipment to our factory or distributor must be previously authorised. The consignment should be done with the equipment well packed, clean of an y liquids, greas e or hazar dous
materials. Tecfluid S.A. will not accept any responsibility for damage done during transport.
Together with the equipment, a note should be enclosed indicating the failure observed, the name,
address and telephone number of the sender. .
TECFLUID, S.A.
Narcís Monturiol, 33
E-08960 Sant Just Desvern
Tel. + 34 93 3724511 - Fax + 34 93 4734449
E-mail: [email protected]
Internet: www.tecfluid.com
The technical data in this pamphlet is subject to modification without notification.
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