YOKOGAWA RAGG User's Manual

Instruction

Rotameter in Case Fitting

Manual

Unpacking : All packaging material must be removed. The transport securing

Assembling position : Vertical

Hints for Assembly : Assemble tension-free! The connection tubes must be aligned.

Commissioning : When functioning properly, the float (1) rotates freely in the flow.

RAGG

device of the float must be removed. If the float is packed
separately, take off the top bolted joint and the top stop and then
insert the float into the measuring tube.

With flanges make sure the screw holes are in line. Avoid
vibration. If necessary, support the tubes in front of and behind the
Rotameter with braces. Avoid large volumes of gas downstream

and upstram of the float (vibration due to compression).

With major floats made of plastic or metal, this can easily be seen
in their rotation. If the float does not rotate, either the device is
soiled or the vertical assembly requirement has been disregarded.
This only applies to floats with notches.The scale mark to which
the float adjusts its top edge is decisive for reading.

Maintenance : To clean the rotameter, remove it from the tube. After the removal

of the two stops (6, 6a) and the float (1), the measuring tube (2)
can be cleaned without removing it from the fitting. For cleaning
we recommend using a bottle brush and soap and water solution.
Make sure the measuring tube does not get scratched.

Disassembly of the
Measuring Tube : Open both windows by unfastening and removing the fixing pins

(20).
Remove the Allen screws (11) at the top and bottom.
Take off the sealing components (13 -17) at the top and bottom
end of the sockets (8).
Only for G4 and G5 tubes: Lift the float by inserting a piece of
sheet metal with triangular cutout (f) between the socket (8) and
the bottom Teflon gasket (17). If necessary, the bottom end of the
tube must be moved towards one of the windows by slightly
shaking it.
Remove the measuring tube (2) together with the sealing
components (13 -17) and the pressure flanges (13).
The measuring tube (2) can be pulled out of the sealing
components (13 -17).
The circlip rings (10) must only be removed when you want to
replace the socket (8).

Assembly of the
Measuring Tube : The stops (14, 14a), the gasket (17), the sealing components (13 -

17), the hose ring (15) and the pressure flange must be pushed
onto the face of the tube, as shown in the drawing. The tube with
the two sealing units is pushed onto the fitting.
The tube with the gasket is mounted in the fitting using the four
Allen screws (11).

IM 1R1B6-E-H

2nd edition

Position Quantity Description

1 1 Float

2 1 Metering Tube

3 1 Exchangable scale

4 1 Right side shell

4a 1 Left side shell

5 1 Scale holder

6 2 Socket holder

7 8 Allen screw

8 2 Socket

9 2 Union flange

10 4 Retaining ring

11 4 Hexagon screw

12 4 U-washer DIN 125

13 2 Pressure flange

14 1 Bottom stop

14a 1 Top stop

15 2 Rubber ring

17 2 Gasket

18 2 Window

19 2 Frame

20 8 Locking bolt

Safety hints : The measuring tube is made of glass and therefore fragile. Avoid

any damage coming from the outside. The specified maximum
pressures must not be exceeded. Pressure peaks must not
exceed the specified maximum pressure either. Pressure shock
may hit the float against the top stop (6a) with high speed. This
may result in the destruction of the stop and the measuring tube
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 gives no
warranty for the improper use of flow meters having glass floats.
Due to the uncontrollability of the material YOKOGAWA cannot
guarantee that the material is fracture-proof.
Further hints can be found in VDI/VDE 3513.

Caution : The metering tube, the float and the scale must always be kept

together.

Units with limitswitches /GM1...GM2 : See instruction manual IM 1R1B19-E-H.

IM 1R1B6-E-H