Flowserve Desuperheaters - Manual (Page 15)

15
Desuperheaters FCD VLENIM0115-00 – 09/11
flowserve.com
Table 5: Dimensions for Reassembly of Retainer
Model Number
Dimension A
(in)
Dimension B
(nozzle stroke)
(in)
Nozzle Mounting
Thread Torque Value
(ft-lbs / Nm)
MCX 025 0.228 0.016 ± .002 30 / 41
MCX 050 0.558 0.032 ± .002 50 / 68
MCX 075 1.000 0.039 ± .002 90 / 122
MCX 100 1.056 0.047 ± .002 200 / 271
MCX 125 1.245 0.055 ± .002 300 / 407
MCX 150 1.478 0.062 ± .002 500 / 678
MCX 175 1.623 0.070 ± .002 600 / 813
MCX 200 1.876 0.078 ± .002 800 / 1085
Figure 13: View of MaxCool MCX tack weld
VaporCool
Follow steps 1-14 and refer to Figure 14 to clean or replace the VaporCool desuperheater.
1. Depressurize the steam line, drain the cooling water line and disconnect the cooling water line
from the desuperheater. Remove the desuperheater from the steam line.
2. Carefully grind off the tack welds between the nozzle head and the lance pipe connection.
3. Unscrew the nozzle head off of the lance pipe connection.
4. Carefully grind off the tack welds between the nozzle head case and the nozzle head face.
5. Secure the large nozzle head face hex flats in a vice and unscrew the nozzle head case by turning
the small hex flats, leaving the nozzle head face in the vice.
6. With a straight screwdriver, unscrew each of the seven nozzles from the nozzle head face.
7. If cleaning is required: With compressed air blow out the passageways of the nozzles and clean
the nozzle mounting cavity. Inspect each hole in the nozzles as well as the nozzle head face for
contamination and blockage. Replace the nozzles and tighten with a screwdriver.
Tack Weld on
Nozzle Pipe