Instruction Manual
D104734X012
ATST Desuperheater
July 2022
2
Table 1. Specifications
Connections
(1)(3)
Steam Line:
NPS 8 through NPS 60
(DN 200 through 1500)
Spraywater:
NPS 1 through 4 (DN 25 through 100)
Atomizing Steam:
NPS 1 (DN 25)
Connection Types
(1)(3)
Steam Line
(all sizes)
:
J
Buttweld ,
J
Raised Face
Flanges,
J
Ring Type Joint Flanges
Spraywater:
J
ASME Buttweld (all sizes),
J
Raised
Face Flanges (all sizes),
J
Ring Type Joint Flanges (all
sizes),
J
Socket Weld
Atomizing Steam
(all sizes)
:
J
Raised Face Flanges,
J
Ring Type Joint Flanges
Pressure Class
(1)(3)
Steam Line:
According to the customer design
pressure and temperature
Spraywater and Atomizing Steam:
ASME CL150 to
CL2500
(4)
Construction Materials
(5)
Desuperheater Body and Liner (if applicable):
J
Carbon Steel,
J
2-1/4 Cr-1 Mo
J
9 Cr-1 Mo-V
J
9 Cr-2 W-V
Spray Nozzles:
J
R31233 Cobalt-Chrome Alloy
Gaskets:
J
N06600/Graphite
Bolting:
J
SA193 Grade B7,
J
SA193 Grade B16,
J
N07718
Maximum Inlet Pressures
(1)
Consistent with applicable pressure-temperature
ratings per ASME B16.34
Maximum Unit Cv (for Spraywater Flow)
Spraywater Pressure Required
(2)
3.5 to 35 bar (50 to 500 psi) greater than steam line
pressure
Atomizing Steam Pressure Required
Atomizing steam source pressure typically should be
at least 2 times the pressure of the steam to be
desuperheated
1. Do not exceed the pressure or temperature limits in this manual, nor any applicable code or standard limitations.
2. A function of required turndown and equipment selection.
3. Offerings meet ASME standards. Consult your Emerson sales office for additional options.
4. Intermediate rating above CL2500 available upon request. PN ratings also available per pressure requirements of EN1092-1. Consult your Emerson sales office for additional information.
5. EN material options available upon request, consult your Emerson sales office for additional information.
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