AERCO SmartPlate - Manual (Page 72)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
Page 72 of 138 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0069_0E
PRI: 11/26/2013 Phone: 800-526-0288 SP-100
Figure 8-13. Tightening Plate Pack Bolts
9. Check the plate pack length ("A") during closing in at least four locations close to the bolts
being used.
10. Place the remaining bolts in position and tighten them.
11. Next, insert the corner bolts and tighten, maintaining dimension "A" of drawing- To avoid
damaging the channel plate corners, it is important that the corner bolts are not used for
closing the Heat Exchanger.
12. The nominal plate pack length "A" can be exceeded in some cases. The tightening can be
stopped at "A" + 2% and pressure tested.
NOTE
When a pneumatic tightening device is used, it should be set at
the maximum tightening torque of 550 Lb-Ft for 3/4" bolts.
Dimension "A" must, however, s t i l l be measured during
tightening.
When the bolts are tightened by hand using a wrench, the
tightening moment is estimated.
IF DIMENSION "A" IS NOT REACHED WITH APPLICATION
OF MAXIMUM TIGHTENING TORQUE:
 Check the number of plates and dimension "A".
 Check that all nuts are running freely. If not, clean and
lubricate or replace.
 Fit all bolts and tighten alternately.