Yokogawa RAGL User Manual
Instruction
Small- and Laboratory- Rotameters
Manual
Assembling Position : Vertical
Hints for Assembly : Must be free of tension. Vibration must be avoided.
Commissioning : Reading point : conical float : top edge spherical float : top end
Maintenance : If the float does not move freely in the flow or if pollution can be seen in
RAGK , RAGL
the glas measuring tube the tube must be cleaned.
To clean the measuring tube, remove it from the fitting. First remove the
protective cap, then unfasten the screws (13, RAGL) and take the
measuring tube forward complete with all sealing components out of the
fitting. With the RAGK type, the device must be removed from the tube
and the head pieces must be screwed off the rear plate and pulled off
the measuring tube. Now the stops (4) and (4a) can be removed and
the float can be taken out of the tube.
CAUTION : The float can easily be lost. Please disassemble the
device on a working surface where nothing can fall or roll off, such
as trays or cardboard boxes.With RAGL / RAGK with valve the complete
valve unit can be pulled forward after loosening the safety screw.
All maintenance operations at the Rotameter (for example
withdrawing of the valve gland or removal of the tube) are only
permitted when the meter is fully drained and without pressure.
Note: In case of a built-in valve, place the safety screw correctly
into the designed bore. In case of a defect of the display unit, the
cover of the display unit can be removed after loosening the cover
screws. When the display unit is taken out, recalibration will be
necessary.
Hints for Cleaning : The measuring tube and float may be cleaned with alcohol. When
cleaning a plastic float, please be careful when using solvents. Do
not leave plastic floats in solvents for lengthy periods of time. After
cleaning the tube, blow it dry. If there is considerable dirt
accumulation on the tube, wash it in hot soap and water solution.
Use bottle brushes only when there is no risk of damaging the
inside of the tube. Please rinse with distilled water or alcohol.
CAUTION : The tubes are calibrated individually. The
measuring tube, the float and the scale must be kept together.
Safety Hints : The measuring tube is made of glass and therefore fragile. All
kinds of damage coming from the outside must be avoided. The
maximum specified pressures must not be exceeded.
Tension in the glas over 6N/mm² have tobe avoided. Therefore the
temperature difference in the glas may not exceed 40°C. Please avoid
temperature shocks. ROTA YOKOGAWA does not give any warranty in
case the of improper use of Glas-Rotameter.
Units with limit switches /GI1...GI4 : See instruction manual IM 01R01B14-E-H.
Particularly the explanations
units with option /XE.
at explosion proof must be regarded for
IM 1R1B7-E-H
4th edition
2
No.
Quantity
RAGL
Quantity
RAGK
Description
11 1Float
2 1 1 Measuring tube
3 1 1 Exchangable scale
4 1 1 Top stop
4a 1 1 Bottom stop
5 - 2 O-ring gasket
5a 2 - Gasket
62 -Ring
72 -Ring
8 2 - Pressure lange
9 1 1 Top head
10 1 1 Bottom head
11 1 1 Complete valve
11a 2 2 O-ring
12 1 1 Screw
13 4 - DIN 84 screw
14 2 2 Nut
15 1 1 Rear plate
16 1 1 Scale holder
19 1 1 Cover
21 2 2
Cutting ring
threated joint
22 2 2 Hose nozzle
23 1 1
Differential pressure
control
23a 1 1 Diaphragm
24 1 1
Cutting ring
threated joint
25 1 1 Joining piece
26 1 1
Cutting ring
threated joint
1
12
RAGL
F2.EPS
RAGK
F3.EPS
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