SECTION 033000 - CAST-IN-PLACE CONCRETE

Sludge Treatment Project Engineered Container Retrieval and Transfer System January 2012
c. Stiffen damper blades for stability.
d. Galvanized, roll-formed steel, 0.064 inch thick.
6. Blade Axles: Stainless steel or Nonferrous metal.
7. Bearings: Oil-impregnated bronze or Molded synthetic.
8. Blade Seals: Neoprene.
9. Jamb Seals: Cambered stainless steel.
10. Tie Bars and Brackets: Galvanized steel.
11. Accessories:
a. Include locking device to hold single-blade dampers in a fixed position without
vibration.
2.3 MANUAL VOLUME CONTROL DAMPERS (EXHAUST SYSTEM)
A. Manufacturers: Subject to compliance with requirements, available manufacturers offering
products that may be incorporated into the Work include, but are not limited to, the following:
1. American Warming and Ventilating; a division of Mestek, Inc.
2. Flanders-CSC
3. Greenheck Fan Corporation.
4. Ruskin Company.
B. Dampers shall meet the requirements of ASME AG-1 Section DA “Dampers and Louvers”.
Frame Leakage class (zero leakage) and blade leakage class II (moderate leakage) rating in
accordance with ASME AG-1 Appendix DA-I, with linkage outside the airstream and bearing
AMCA’s Certified Ratings Seal for both air performance and air leakage.
C. Dampers shall be designed for a minimum pressure of minus 20-in w.g.
D. Frames: Steel Channel, material shall be stainless steel Type 304 or 304L and be listed in
ASME AG-1 Table DA-3110.
E. Blades: Fabricated of the same material as the frame, minimum ¼-in. thick.
F. Bearings: Grease lubricated ball bearings mounted outboard of the damper frame.
G. Shaft: Continuous, stainless steel.
H. Shaft seals: external adjustable double packing gland shaft seal.
I. Provide with lockable hand quadrant.
J. Visual Inspection.
1. Perform a Visual Inspection in accordance with ASME AG-1 Section DA-5200 and
Section TA-4220. Submit Visual Inspection procedures and reports.
K. Structural Capability Test:
Contract 44577 KW Annex - Rev. E 44577-CSI-SPEC-001 233300 - 4