Sibata LV-20N User manual

CODE 080120-0211
080120-0311
Suction Pump Flow Meter
LV-20N / LV-30N
OPERATION MANUAL
1. Overview
The LV-20N/LV-30N is a float type (area type) suction pump flow meter. The suction flowrate can be
adjusted using the needle valve provided with the instrument. A pressure gauge is also provided,
which allows the suction pressure to be measured. This is ideal for measuring and adjusting the
flowrate of suction pumps.
2. Specifications
Item code 080120-0211 080120-0311
Model LV-20N LV-30N
3.2 L/min to 32 L/min 4.2 L/min to 42 L/min
Flowrate measurement range Air at 20 °C and 1 atmospheric pressure standard;
flowrate reading position: center of the ball
Pressure measurement range -0.5 kPa to -10 kPa
Tube nozzle diameter External diameter: φ12 mm
(Tube used: internal diameter of φ10 mm to φ11 mm)
Dimensions 140(W) ×175(D) ×270(H) mm (not including protruding parts)
Weight 1.56 kg 1.73 kg
Ambient temperature and
humidity 0 °C to 40 °C; 10 % rh to 90 % rh (no condensation)
3. Composition
(2)
(1)
(3)
(4)
(5) OUTLET
INLET
(7)
(6)
(6) Tube connection nozzle, inlet: External diameter φ12 mm
(Tube used: internal diameter of φ10 mm to φ11 mm)
Note: Connect the tubing to equipment for sampling
dust etc.
(7) Tube connection nozzle, outlet: External diameter φ12 mm
(Tube used: internal diameter of φ10 mm to φ11 mm)
Note: Connect the tubing to the suction port on the
suction pump.
(1) Needle valve
(for flowrate adjustment)
(2) Taper tube
(3) Float (Flowrate reading position:
center of the ball)
(4) Base
(5) Pressure Gauge

4. Instructions for Use
(1) Install the flow meter perpendicularly at a level, stable location.
(2) Use the tubing to connect the sampling equipment, flow meter, and suction pump.
(3) Start the suction pump, and measure the suction flowrate. Adjust the flowrate with the needle
valve. The flowrate reading position is the center of the ball.
Note: The float position will change vertically depending on the ambient temperature and air
pressure. It will be particularly affected by an increase in pressure loss due to an
accumulation of dust on the sampling filter.
For flowrate correction procedures, refer to the Work Environment Measurement
Guidebook.
5. Cautions for Use
•Install the flow meter perpendicularly at a level, stable location. The location must not be
subject to irregular vertical motion or rotation, and the float must not touch the taper tube.
Ensure that it is perpendicular before use.
•If dust or moisture gets into the gap between the taper tube and the float, it may lead to
clogging, or destabilize the float. When using the flow meter, connect the sampling
equipment, and ensure that dust does not enter the flow meter.
•Excessive pressure exceeding the upper measurement limit for the pressure gauge will
increase measurement errors and lead to breakdowns.
•Exposure to vibrations and pulsations for an extended period will increase measurement
errors and lead to breakdowns.
6. Troubleshooting
Before initiating repairs, inspect the instrument one more time.
If it is still malfunctioning, contact your Shibata representative.
Problem Cause Remedy
A tube is not connected properly. Connect the tubes properly.
There is no suction, or the
flowrate is low.
A tube has a kink in it. Ensure that the tubes are
straight.
The flow position is unstable. The flow meter is not installed
perpendicularly.
Install it perpendicularly at a
level, stable location.
13.12.25H(01)
1-1-62, Nakane, Soka, Saitama, 340-0005 Japan
TEL : [phone] FAX : [phone]
URL : http://www.sibata.co.jp/