Ruskin Manufacturing June 2014
3900 Dr. Greaves Road
Kansas City, Missouri  64030
Phone		(816) 761-7476
Fax		(816) 765-8955
Web Site	www.ruskin.com

Product Guide Specification

Specifier Notes:  This product guide specification is written according to the Construction Specifications Institute (CSI) Format, including MasterFormat (1995 Edition), SectionFormat, and PageFormat, contained in the CSI Manual of Practice.

The section must be carefully reviewed and edited by the Engineer to meet the requirements of the project and local building code.  Coordinate this section with other specification sections and the drawings.

Delete all "Specifier Notes" when editing this section.	

SECTION 23 33 00

HIGH PRESSURE ROUND CONTROL DAMPERS

Specifier Notes:  This section covers Ruskin high pressure round control dampers with circular blade, 25 inches w.g. (6.2 kPa) maximum static pressure, Model CDR93.  Consult Ruskin for assistance in editing this section for specific applications.	

PART 1	GENERAL

1.1	SECTION INCLUDES

A.	High pressure round control dampers with circular blade, 25 inches w.g. (6.2 kPa) maximum static pressure.

1.2	RELATED SECTIONS

Specifier Notes:  Edit the following list as required for the project.  List other sections with work directly related to the dampers.	

A.	Section 23 31 00 - Ducts.

B.	Section 23 09 00 - Damper Controllers.

1.3	REFERENCES

	A.	AMCA 500 - Test Methods for Louvers, Dampers and Shutters.

1.4	SUBMITTALS

A.	Comply with requirements of Section 01 33 00 - Submittal Procedures.

B.	Product Data:  Submit manufacturer's product data, including leakage, pressure drop, and maximum pressure data in accordance with AMCA 500 testing.  Submit data for full range of damper sizes.

C.	Shop Drawings:  Submit shop drawings indicating materials, construction, dimensions, and installation details.

1.5	DELIVERY, STORAGE, AND HANDLING

A.	Delivery:  Deliver materials to site in manufacturer's original, unopened containers and packaging, with labels clearly indicating manufacturer, material, and location of installation.

B.	Storage:  Store materials in a dry area indoors, protected from damage and in accordance with manufacturer's instructions.

C.	Handling:  Protect materials and finishes during handling and installation to prevent damage.

PART 2	PRODUCTS

2.1	MANUFACTURER

A.	Ruskin Manufacturing, 3900 Dr. Greaves Road, Kansas City, Missouri 64030.  
Phone (816) 761-7476.  Fax (816) 765-8955.  Web Site www.ruskin.com.

2.2	HIGH PRESSURE ROUND CONTROL DAMPERS

Specifier Notes:  Consult Ruskin for assistance in selecting from options for specific applications.	

A.	Fabrication:
1.	Model:  	CDR93.
2.	Type:	Butterfly.
3.	Frame:  [Rolled steel] [Type 304 stainless steel] channel.
a.	Flange:  [1-1/4 inches x minimum 10 gage (32 x minimum 3.5 mm)] [1-1/2 inches x minimum 10 gage (38 x minimum 3.5 mm)] [1-1/2 inches x minimum 1/4 inch (38 x minimum 6 mm)] [2 inches x minimum 1/4 inch (51 x minimum 6 mm)] [2-1/2 inches x minimum 5/16 inches (64 x minimum 8 mm)].
b.	Web:  [6 inches x minimum 10 gage (152 x minimum 3.5 mm)] [9 inches x minimum 10 gage (229 x minimum 3.5 mm)] [12 inches x minimum 1/4 inch (305 x minimum 6 mm)] [12 inches x minimum 5/16 inch (305 x minimum 8 mm)].
c.	Bolt Holes:  [One flange] [Both flanges].
4.	Blade:  Circular, [rolled steel] [Type 304 stainless steel], [minimum 1/4 inch (6 mm)] [minimum 3/8 inch (10 mm)] thick.  Blade stiffeners as required.  Mounted to axle within formed flanged frame.
5.	Blade Stop:  Full circumference, located in air stream, [minimum 1/2 inch x 1/4 inch (13 x 6 mm) steel bar on dampers under 17 inches (432 mm) diameter] [minimum 1/2 inch x 1/2 inch (13 x 13 mm) steel bar on dampers 17 inches (432 mm) diameter and larger].
6.	Axle:  [Minimum 3/4 inch (19 mm)] [Minimum 1 inch (25 mm)] [Minimum 1-1/2 inches (38 mm)] [Minimum 2 inches (51 mm)] [Minimum 2-1/2 inches (64 mm)] diameter, continuous, [plated steel] [Type 304 stainless steel] rod.  Angle reinforced as required.
7.	Control Shaft:  Axle extends 6 inches (152 mm) beyond frame.
8.	Bearings:  Grease lubricated ball bearings mounted outboard of frame with adjustable packing gland shaft seals.

Specifier Notes:  Actuator selection, mounting on damper, and pretest cycling will be performed by Ruskin.  Consult Ruskin for additional testing and mounting configurations of Ruskin-supplied actuators.	

9.	Actuator:  [Manual, hand quadrant] [Manual, __________ ] [Electric, 120 V, 60 Hz, two-position, spring-return] [Electric, __________ ] [Pneumatic, 20 to 30 psi (138 to 207 kPa) supply air pressure, two-position, spring-return] [Pneumatic, __________ ].
10.	Blade Seals:  Mechanically attach blade seals to blade.  [Neoprene blade seals, maximum 250 degrees F (121 degrees C)] [EPDM blade seals, maximum 250 degrees F (121 degrees C)] [Silicone blade seals, maximum 400 degrees F (204 degrees C)] [Viton blade seals, maximum 400 degrees F (204 degrees C)] [Tetraglass blade seals, maximum 1000 degrees F (538 degrees C)].

Specifier Notes:  Standard finish is aluminum paint with some parts mill galvanized.  Consult Ruskin for assistance in specifying special materials and finishes for specific applications.	

11.	Finish:  Aluminum paint with some parts mill galvanized.
12.	Maximum Operating Temperature:  [250 degrees F (121 degrees C)] [ __________ ].
13.	Assembly:  Factory assemble damper components.

Specifier Notes:  Dampers may tolerate higher pressures and velocities than those specified.  Consult Ruskin when a damper is to be applied in conditions exceeding recommended maximums.	

B.	Performance Data for Damper Diameter of 72 inches (1,829 mm):
1.	Maximum System Pressure:  25 inches w.g. (6.2 kPa).
2.	Maximum System Velocity:  7,000 feet per minute (2,134 m/min).
3.	Leakage with Seals:  Based on pressure differential of 1 inch w.g. (0.25 kPa).
a.	Percent of Maximum Flow:  0.030.
b.	Total Leakage:  60 cubic feet per minute (1.7 m3/min).
4.	Leakage without Seals:  Based on pressure differential of 1 inch w.g. (0.25 kPa).
a.	Percent of Maximum Flow:  0.139
b.	Total Leakage:  275 cubic feet per minute (7.8 m3/min).

C.	Performance Data for Damper Diameter of 12 inches (305 mm):
1.	Maximum System Pressure:  25 inches w.g. (6.2 kPa).
2.	Maximum System Velocity:  7,000 feet per minute (2,134 m/min).
3.	Leakage with Seals:  Based on pressure differential of 1 inch w.g. (0.25 kPa).
a.	Percent of Maximum Flow:  0.273.
b.	Total Leakage:  15 cubic feet per minute (0.4 m3/min).
4.	Leakage without Seals:  Based on pressure differential of 1 inch w.g. (0.25 kPa).
a.	Percent of Maximum Flow:  0.909.
b.	Total Leakage:  50 cubic feet per minute (1.4 m3/min).

2.3	SOURCE QUALITY CONTROL

A.	Factory Tests:  Factory cycle damper and actuator to assure proper operation.

PART 3	EXECUTION

3.1	EXAMINATION

A.	Examine areas to receive dampers.  Notify the Engineer of conditions that would adversely affect the installation or subsequent utilization of the dampers.  Do not proceed with installation until unsatisfactory conditions are corrected.

3.2	INSTALLATION

A.	Install dampers at locations indicated on the drawings and in accordance with manufacturer's instructions.

Specifier Notes:  Consult Ruskin for dampers with axle orientation other than horizontal.	

B.	Install dampers round and free from distortion with axle running horizontally.

END OF SECTION