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YarwaY 

A.T.-Temp CryogeniC desuperheATer

InstallatIon and MaIntenance InstructIons

Unpacking

The A.T.-Temp Cryogenic desuperheater is 
packed with the greatest of care in wooden 
boxes or cartons for protection during handling 
and transit to site. After hydrostatic testing, 
the unit is flushed through with a high grade of 
preservative to protect machined and internal 
surfaces from corrosion. if it is found, however, 
that damage has occurred during shipment, 
then this should be reported immediately to 
your forwarder or yarway representative.
particular care should be taken when removing 

installation of the a.t.-temp 
crYogenic desUperheater

Before installation, check the A.T.-Temp 
Cryogenic desuperheater, actuator and 
accessories for any visible damage.
Check that the information on the 
documentation, identification plate and 
tag number complies with the order 
specification. remove the A.T.-Temp Cryogenic 
desuperheater carefully from its packaging, 
lifting by means of straps around the body, or 
use the hoisting lug if provided. do not use the 
water inlet connection, yoke, actuator or any 
of its accessories for lifting. Leave the flange 
covers in place during transportation, until 
ready to install in the pipework.
When installing the A.T.-Temp Cryogenic 
desuperheater use gaskets and bolting 
material in accordance with the relevant piping 
code, for example Asme/Ansi B31.3 or en. 
place the gasket onto the mounting flange and 
carefully insert the nozzle into the branch pipe. 
ensure that the spray cylinder is pointed in the 
direction of the gas flow before tightening the 
mounting bolts (see Figure 2).

note:

 the A.T.-Temp Cryogenic desuperheaters 

should be installed free of ‘forces, moments 
and torques’.

emerson.com/finalcontrol

© 2017 emerson. All rights reserved.

Vciom-03219-en 18/04

the A.T.-Temp Cryogenic desuperheater 
from its packing and your special attention is 
required to check carefully that no damage has 
occurred to flange faces, threading, actuators, 
connecting pipes, etc. (see Figure 1).
hoist the unit with straps around the body as 
depicted, do not lift the unit by the hoisting lug 
on the actuator.

Before installation these instructions must be fully read and understood

Summary of Contents for Yarway

Page 1: ...body or use the hoisting lug if provided Do not use the water inlet connection yoke actuator or any of its accessories for lifting Leave the flange covers in place during transportation until ready to install in the pipework When installing the A T Temp Cryogenic desuperheater use gaskets and bolting material in accordance with the relevant piping code for example ASME ANSI B31 3 or EN Place the g...

Page 2: ... Pneumatic or E P positioner Figure 1 Check for damages Check for damages Figure 2 Figure 3 Liquid flange positions Process line Process gas flow Handwheel positions Process line Process gas flow The minimum pipe run required downstream of the A T Temp Cryogenic desuperheater varies with each individual application and would be specified by Yarway at the enquiry stage This straight run is needed t...

Page 3: ...cting to the A T Temp Cryogenic desuperheater mounting flange see Figure 6 Figure 5 Yarway supplies the A T Temp Cryogenic desuperheater as follows Identification number xx 37 xxxxx Fabricated type with non balanced stem xx 47 xxxxx Fabricated type with semi balanced stem and oversized trim all with the spray cylinder tack welded to the body extension pipe Note horizontal orientated A T Temp Cryog...

Page 4: ...rdination between instrument signals and temperature are attained adjustment of the set point can be made and the system transferred to automatic operation It is recommended to record the various process coordinates over a sustained period to verify operation adjusting where necessary Maintenance Note maintenance of the A T Temp Cryogenic desuperheater is straight forward and does not require any ...

Page 5: ...ng wire brush and or honing device Cleanless of the packing area is vital for proper valve sealing Do not use grease or lubricants in combination with PTFE Chevron type packing The actual packing design is mentioned on the project related valve drawing Only ever use genuine Yarway components as they are supplied as matched sets see Figure 9 Disassembly see Figure 8 The A T Temp Cryogenic desuperhe...

Page 6: ... material removed Insert the A T Temp Cryogenic desuperheater into the pipework and check that the nozzle is orientated correctly with the spray with the direction of the gas flow Apply a suitable lubricating compound to the bolts and nuts and tighten evenly in accordance with the manufacturer s recommendations Before connecting the liquid line flush through and check for any contamination or rest...

Page 7: ...plate SA 182 F304L 19 Name plate AISI 316 20 Lock nut Stainless steel 21 Coupling SA 182 F304L 23 Securing washer Stainless steel 24 Vapor flange SA 182 F304 F304L dual certified 25 Guiding PTFE 26 Spring AISI 631 17 7 PH 27 Shoulder bolt SA 320 B8 CL 2 28 Securing washer Stainless steel 29 Flange female SA 182 F304L 30 Flange male SA 182 F304L 31 Extension pipe SA 312 TP304L 32 Piston rings Alumi...

Page 8: ...rred Before placing the A T Temp Cryogenic desuperheater into service stroke valve spindle a few times and inspect other components such as actuator seals etc to ensure correct functioning Follow the procedure for installation as detailed in the operating and maintenance instruction manual Note materials and data of units supplied may deviated from this Instruction Manual Please consult order docu...

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