Control systems Desuperheaters
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Sizes Spirax Sarco desuperheaters are specified by their nominal inlet and outlet size in inches. For example an 80 mm (3.14") connection is referred to as Size 3, a 250 mm (9.84") would be Size 10.
Dimensions and weights Please refer to the general assembly detail drawing generated by the sizing and selection software for details of specific desuperheaters.
Selection guide
Example
Desuperheater type
VTD
STD, SND, VTD and SAD
Steam inlet / outlet size, mm (inches)
080
20 mm - 450 mm (0.78" - 17.7")
CS - Carbon steel A106 Grade B. For VTD sizes 1 to 2, CS = A350 LF2N material CM - Chrome molybdenum A182 F11
Shell / pipe material
CS
ASME 150, ASME 300, ASME 600, ASME 900, ASME 1500 PN16, PN25, PN40, PN63 and PN100
Steam end connections
A600
Flange style
WN
Weld neck or slip-on
4.8 9
How to order 1 off Spirax Sarco Size 3 desuperheater model VTD080CS having ASME 600 RF weld neck flanged connections. (Attach the desuperheater Data Sheet with your order).
Spare parts For units with fixed internals, spare parts are not available. Spare parts and internal diffuser removal tools are available for units fitted with removable internals. For guidance ; SAD of 6" and larger and VTD of 10" and larger are of a fully welded construction, hence spare parts are not available. There are no spares available for SND or STD with fixed nozzle assembly. Please quote the equipment model number and serial number from the nameplate when requesting parts.
TI-P475-01 TES Issue 5
Page 9 of 9
Direct Contact Desuperheaters
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