6 MG 71 en
3
1
GENERAL
1.1
Preface
The gearbox of the M-series is a quarter turn gearbox
intended to be used for the manual operation of valves (e.g.
butterfly valves) in pipelines.
NB.
This manual is valid only for the standard M-series
gearboxes of Metso. For special versions, specifications and
model can differ.
Metso is not responsible for any damage caused by incor-
rect use of the gearbox.
1.2
Technical data
Specifications
The maximum allowable input and output torque are listed
in the Table 1.
This gearbox is applicable to valve shafts with keyway only.
For more specified information, you can contact our sales
departement.
1.3
Handling and safety precautions
Be sure to read and understand this manual before installa-
tion and use of our gearboxes.
Storage
The gearboxes need to be stored in a safe way to avoid acci-
dents. Also avoid storage in areas subjected to high tem-
perature extremes and /or areas subjected to large
amounts of humidity and dust.
Handling
Never drop the gearbox or otherwise subject it to strong
impact.
Correct use
Prior to installation, be sure the gearbox will NOT be over-
loaded during normal use. For this, convince yourself the
valve size and needed openeing torque do not exceed the
values given for the gearbox. For the maximum allowable
torque on the gearbox, see Table 1.
Installation and operating
Not observing the rules as stated in this manual, can lead to
damage and / or personal injuries. The qualified personel
must be fully aware of the instructions as descibed in this
manual.
Only when the instructions are observed, correct operation
of the gearboxes can be guaranteed.
Disposal
Never refuse a gearbox at a general disposal unit. The gear-
box has to be offered to a disposal depot for recycling. The
iron parts can be used for recycling. The seals are of nitrile
and can be used for plastic recycling.
The grease may not be discharged to sewer- or surface
water. It has to be disposed according to local regulations
for incineration.
1.4
ATEX
Your gearbox can be supplied with a label with following
markings:
This means that the gearbox meets the ATEX-directive 94/
9/EG
This product is fabricated conform the procedure related to
internal control of production with regards to the safety
aspects.
This product meets the requirements for explosion preven-
tion
In a potential explosive surrounding, other than in mines,
With a high level of safety, based on normal operation and
anticipated risks
Suitable for a possible explosive atmosphere caused by
gases, vapours, mists of air/dust mixtures
Safety obtained by constructive solutions.
2
INSTALLATION
2.1
Mounting to the valve
Following description applies to standard type gearboxes.
1. The gearbox is standard delivered in the closed position.
2. It is recommended to mount a handwheel on the input
shaft before assembling the gearbox to the valve,
Figure 1.
3. Check if the boltcircle of the flanges (of gearbox and
valve) coincide. Also check if the valve stem and the
bore of the gearbox match.
4. Make sure the valve is in the closed position. If not, close
the valve before continuing.
5. Check if the gearbox is in fully closed position by tur-
ning the handwheel clockwise.
Table 1
Connection data of the gearbox
Gearbox
type
Connection Valve
Max. Torque [Nm]
ISO 5211/1
Input
Output
M07
F05-F07-F10
29
330
M10
F05-F07-F10
43
500
M12
F10-F12
83
1000
M14
F10-F12-F14-F16
152
2000
M15 F10-F12-F14-F16
171
3250
M16
F16-F25
136
4500
M25 F16-F25
305
8400