Fisher DMA, DMA/AF, DMA/AF-HTC, DSA, and DVI Desuperheaters0 pages

Product Bulletin

Desuperheaters

85.2:DMA
July 2014

D101443X012

Fisherr DMA, DMA-AF, DMA-AF-HTC,
DSA, and DVI Desuperheaters
Fisher DMA, DMA-AF, DMA-AF-HTC, DSA, and DVI
desuperheaters can be used in many applications to
efficiently reduce the temperature of superheated
steam to the desired set point. Available variations are
mechanically atomized (both fixed geometry and
variable geometry) and steam assisted.
Desuperheaters are available for installation in steam
lines from DN25 through DN1500 (NPS 1 through 60)
in diameter and are capable of maintaining steam
temperatures to within 6_C (10_F) of saturation
temperatures.
W6298

DMA-AF

W9320

DMA

Available Insertion Style
Desuperheaters

DMA–A simple mechanically atomized
desuperheater with single or multiple,
fixed-geometry spray nozzles is intended for
applications with nearly constant load. The DMA is
installed through a flanged connection on the side
of a DN150 (NPS 6) or larger pipeline. Maximum
unit Cv is 3.8.

W6299

DSA
X0260

DMA-AF-HTC

DMA-AF–A variable-geometry, mechanically
atomized, back-pressure-activated desuperheater
with one, two, or three spray nozzles is designed for
applications requiring control over moderate load
fluctuations. The DMA-AF desuperheater (figure 1)
is installed through a flanged connection on the
side of a DN200 (NPS 8) or larger pipeline.
Maximum unit Cv is 15.0.

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W6297

DVI