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YARWAY MODEL 20 PNEUMATIC DIAPHRAGM ACTUATOR
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
MAINTENANCE
Maintenance of the Yarway actuator is straight
forward and does not require any special tools
or training.
Care should be taken during any maintenance
operation, particularly when working with
grinders, compressed air and rotating
machinery. It is imperative that safety
glasses and protective workwear are used in
accordance with standard safety procedures.
In case of doubt, consult your supervisor or
safety officer before commencing any work
on the equipment.
MANUAL OPERATOR
• The Yarway manual operator is side-mounted
between the actuator and the Desuperheater.
• The manual operator is intended to be used
for emergency only.
• The handwheel (23) is locked by means of
a padlock (19).
• The handwheel will not turn during actuated
operation of the actuator assembly and/or
Desuperheater assembly.
• By unlocking the padlock, clockwise turning
the handwheel will move the 2 spindle
parts (5)(6) away from each other, opening
the valve.
• Turning counter clockwise, the valve
will close.
After using the manual operator, the system
shall be set back to the original position. Failing
to do so may lead to improper valve response
and/or damaging of the piston/spray cylinder.
NOTES
- Apply some general purpose grease on the
gear wheel (7)(9) once a year.
- Make sure no dirt is trapped between the
drive shaft (4) and the wheel large (7).
- This may obstruct free movement between
these parts.
TABLE 6 - SPARE PARTS
Item
Qty
7, 9 + 13, 15, 16, 17
1
4, 5, 6
1
4, 5, 6
1
© 2017 Emerson. All rights reserved.
STORAGE PROCEDURE
Upon receipt, check both the pneumatic
actuator and the packing case for any transit
damage. Any damage to the pneumatic
actuator should be reported immediately to
Yarway or their local agent. Any damage to
the packing container should be rectified to
prevent the ingress of dust or water, prior to
placing the equipment into storage. Check
the information contained on the identification
plate (tagplate) and documentation and return
the unit to its packing with protective covers in
place (see fig. 5).
For short term storage, up to 6 months
duration, no additional preservation measures
are necessary. Retain the unit in its original
packing in a clean, dry indoor location.
If outdoor storage is unavoidable, then
the packing case should be enclosed in a
waterproof covering.
For long term storage use a dry indoor location
only. Retain pneumatic actuator in its original
packing and inspect at 3 monthly intervals to
ensure that no deterioration has occurred.
Before placing the pneumatic actuator into
service, inspect all components, to ensure
correct functioning. Follow the procedure for
installation as detailed in the operating and
maintenance instruction manual.
WARNING
The hoisting lug is for the actuator only, NOT for
a total assembly!
NOTE
Materials and data of units supplied, may
deviated from this Instruction Manual. Please
consult order documents in case of doubt.
The pneumatic actuator is classified under
European Directive 2014/68/EC under
category I with CE-marking and ATEX 2014/34/
EC. See actuator name plate.
Name
Spares SM handwheel
Spindle kit SM handwheel Al Bronze
Spindle kit SM handwheel GGGN60
Part number
4N-4307-20
4N-4308-20
4N-4310-20
8
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