substitution request - Alliance Construction Solutions

Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
d. Duro Dyne Corp.
e. Environmental Elements Corp., Subs. of Koppers Co., Inc.
f. Hart & Cooley Mfg. Co.
4. Duct Hardware:
a. Ventfabrics, Inc.
b. Young Regulator Co.
5. Duct Access Doors:
a. Kess
b. Greenheck
c. Flexmaster (Inspector Series)
d. Cesco-Advanced Air
e. Duro Dyne Corp.
f. Ventfabrics, Inc.
6. Flexible Connections:
a. Duro Dyne Corp.
b. Ventfabrics, Inc.
c. General Rubber Corp. (Process Exhaust Only)
7. Constant Velocity Exhaust Fan Dampers:
2.02 MANUAL VOLUME DAMPERS:
a. American Warming and Ventilating
A. Low Pressure Rectangular Dampers (less than 2000 FPM and under 4” W.C. S.P.
Differential):
1. For 12” in height or larger, use multiple opposed blade type and close fitted to
ducts. The frame and blades shall be constructed of 16 ga. galvanized steel with
carbon steel shaft mounted with oil-impregnated bronze/stainless steel bearings.
Dampers shall be fitted with aluminum/stainless steel jamb seals and dual
durometer vinyl/silicone blade edge seals. Linkage shall be in-jamb fixed type
located outside the air stream and made of plated steel tie bar and crank plates,
with stainless steel pivots. / on-blade fixed type located within the air stream and
made of galvanized steel interconnected with plated steel brackets and pivots.
Damper panels shall not exceed 48” wide. Provide jack shafting when duct size
required is greater than 48” wide. Provide notched shaft end indicating damper
position, locking quadrant to fix damper position, and handle. For flat oval and
round ductwork, provide type C housing.
2. For ducts less than 12” in height, frame shall be 16 ga. galvanized steel, with 20
ga. galvanized steel blades, steel axle with nylon bearings, locking quadrant
handle, and notched shaft end indicating damper position.
OR
Aluminum frame with stainless steel bearings.
23 3300 - 3 AIR DUCT ACCESSORIES