Emerson Yarway 20-55 Quick guide

YARWAY OPERATING AND SAFETY INSTRUCTIONS

Pneumatic actuator

WARNING

For safety reasons, it is important to take the

following precautions before you start work

onthePDA*:

1. Read all labels fitted to the PDA* and

this sheet before installation, operation

ormaintenance.

2. Use PDA* for the intended purpose

(accordingcontract/specification).

3. Remove the PDA* carefully from its packaging,

lifting by means of straps (heavy weight)

around the body or use the hoisting lug.

4. The hoisting lug is for the actuator only,

notforthe total assembly!!!

5. For installation of the PDA* use bolting

material (2 half-couplings and lock nut; parts

of the Desuperheater) and free of 'forces,

moments and torques'.

6. Additional mounting/modifications on PDA's*

are not allowed without approval from Yarway.

7. The line must be depressurized, drained,

vented and cooled down before installation.

8. Handling of all PDA's *, with or without

accessories must be carried out by personnel

trained in all aspects of manual, mechanical

handling/lifting techniques and standard

safety procedures, in case of doubt, consult

your supervisor and/or safety officer.

9. Yarway do not accept liability for site work

performed under supervision of others.

10. Each PDA* air supply line should be protected

with its own air filter regulator.

11. Please, follow the procedure as detailed

intheIOM**.

12. Warning: high spring loaded assembly

(useextended bolts for dismantling).

13. The surface temperature as defined

in 2014/34/EC Annex II 2.2.1.2 of the

Desuperheater is a function of the system

it is built into. When installed, the surface

temperature cannot be controlled by the

manufacturer.

Before installation these instructions must be fully read and understood

!! Read all warning labels fitted to the PDA*

beforeoperation or maintenance !!

Never open, dismantle or modify the assembly

whilst under pressure/temperature or other

hazardous conditions.

NOTE

PDA* = Pneumatic diaphragm actuator

IOM** = Installation, Operation and Maintenance

Manual

INSTALLATION

1. Place the PDA* with its yoke flange onto

thebonnet of the Desuperheater and fixed

itwith the lock nut.

2. Assemble the 2 half-couplings (upper and

lower) through the screws.

3. Installation may be in vertical or horizontal

piping (use support in case of heavy weight).

4. For installation of the positioner and

the air filter regulator, following the

manufacturer's recommendations.

5. Connect the lever of the positioner to the

stem coupling (mechanical linkage) and

adjust, if necessary, set points for air filter

regulator, and valve positioner, following

themanufacturer's recommendations.

6. Connection of electrical supplies and/or

air piping should be in accordance with

themanufacturer's instruction manual.

7. When satisfactory coordination between

signals and temperature are attained,

adjustment of the set-point can be made

and the system transferred to automatic

operation.

8. Ensure easy access of the operating

mechanism (actuator, positioner,

handwheel, etc.) if applicable.

CATEGORY

PDA's* are manufactured in accordance with

2014/68/EC - category I - gas group2.

Pressure/temperature limits are indicated:

# on the PDA* nameplate

YARWAY OPERATING AND SAFETY INSTRUCTIONS

Pneumatic actuator

Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.

Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Yarway is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson

and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be

construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by

our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without

notice.

Emerson.com/FinalControl

NOTE

PDA* = Pneumatic diaphragm actuator

IOM** = Installation, Operation and Maintenance

Manual

FINAL INSPECTION

Yarway PDA's* have been tested, degreased,

dried and prepared according toservice

application. This should be carried out in

accordance with the relevant IOM** and

available by: Emerson B.V., Yarway, via our

website: Emerson.com/FinalControl

STATE OF DELIVERY / STORAGE /

SELECTION/ SERVICE LIFE

State of delivery

Yarway’s PDA's* are delivered with protection

and tested to 9.0 bar. Particular care should

be exercised when removing the PDA* from

its packaging and your special attention is

required to check carefully that no damage

has occurred to the actuator, accessories,

piping and fittings before installation. Check

outIOM**- instructions before proceeding.

Storage

For short term storage, up to 6 months, no

additional preservation is necessary. Retain

the PDA in its original packaging in a clean,

dry indoor location. For long term storage, use

only a dry indoor location. Follow instructions

given in the IOM** before placing the PDA

into service, inspect all components to

ensurecorrect functioning.

SPARE PARTS

Use only genuine Yarway components.

AllPDA's* are identified by an identification

number, stamped on the identification plate.

Use this number when ordering spare parts.

Selection

Be certain that the diaphragm casing

pressure does not exceed the limits listed

in the specification table and identification

plate. If in doubt, contact Yarway or your

localrepresentative.

Model: 20-55 (stroke 55 mm) and

Model: 20-90 (stroke 90 mm)

Service life

Expected service life may vary upon condition of

service. Check unit at least once per 8000 hours

or longer intervals based upon site experience.

This manual suits for next models

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