Ruskin Manufacturing	February 1997
3900 Dr. Greaves Road
Kansas City, Missouri  64030
Phone	(816) 761-7476
Fax		(816) 765-8955

Product Guide Specification

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Specifier Notes:  This product guide specification is written according to the Construction Specifications Institute (CSI) MasterFormat, Three-Part SectionFormat, and PageFormat, contained in the CSI Manual of Practice.  Five-digit section numbers are from MasterFormat, 1995 edition.

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

Delete all "Specifier Notes" when editing this section.
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SECTION 15820

HEAVY DUTY ROUND ISOLATION DAMPERS

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Specifier Notes:  This section covers Ruskin Manufacturing heavy duty round isolation dampers with circular blade, Model CDRI92.  Consult Ruskin for assistance in editing this section for specific applications.
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PART 1	GENERAL

1.1	SECTION INCLUDES

A.	Heavy duty round isolation dampers with circular blade.

1.2	RELATED SECTIONS

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Specifier Notes:  Edit the following list as required for the project.  List other sections with work directly related to the dampers.
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A.	Section 15810 - Ducts.

B.	Section 15900 - Damper Controllers.

1.3	REFERENCES

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

1.4	SUBMITTALS

A.	Comply with requirements of Section 01330 - 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.

2.2	HEAVY DUTY ROUND ISOLATION DAMPERS

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Specifier Notes:  Consult Ruskin for assistance in selecting from options for specific applications.  
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A.	Fabrication:
1.	Model:  CDRI92.
2.	Type:  Butterfly.
3.	Frame:  [Rolled steel] [Type 304 stainless steel] channel with clean and smooth interior surface.
a.	Flange:  [For inside diameters above 4 inches (102 mm) through 11.75 inches (298 mm), 1-1/4 inches x minimum 10 gage (32 mm x minimum 3.5 mm)] [For inside diameters above 11.75 inches (298 mm) through 14 inches (356 mm), 1-1/2 inches x minimum 10 gage (38 mm x minimum 3.5 mm)] [For inside diameters above 14 inches (356 mm) through 24 inches (610 mm), 1-1/2 inches x minimum 1/4 inch (38 mm x minimum 6 mm)] [For inside diameters above 24 inches (610 mm) through 48 

inches (1,219 mm), 2 inches x minimum 1/4 inch (51 mm x minimum 6 mm)] [For 
inside diameters above 48 inches (1,219 mm) through 72 inches (1,829 mm), 2-1/2 inches x minimum 5/16 inches (63 mm x minimum 8 mm)].
b.	Web:  [For inside diameters above 4 inches (102 mm) through 8.75 inches (222 mm), 6 inches x minimum 10 gage (152 mm x minimum 3.5 mm)] [For inside diameters above 8.75 inches (222 mm) through 24 inches (610 mm), 9 inches x minimum 10 gage (229 mm x minimum 3.5 mm)] [For inside diameters above 24 inches (610 mm) through 48 inches (1,219 mm), 12 inches x minimum 1/4 inch (305 mm x minimum 6 mm)] [For inside diameters above 48 inches (1,219 mm) through 72 inches (1,829 mm), 12 inches x minimum 5/16 inch (305 mm x minimum 8 mm)].
c.	Bolt Holes:  [One flange] [Both flanges].
4.	Blade:  Circular, [rolled steel] [Type 304 stainless steel].  [For inside diameters above 4 inches (102 mm) through 48 inches (1,219 mm), minimum 1/4 inch (6 mm) thick] [For inside diameters above 48 inches (1,219 mm) through 72 inches (1,829 mm), minimum 3/8 inch (9 mm) thick].  Blade stiffeners as required.  Mounted to axle within formed flanged frame.
5.	Axle:  [For inside diameters above 4 inches (102 mm) through 8.75 inches (222 mm), minimum 1/2 inch (13 mm) diameter] [For inside diameters above 8.75 inches (222 mm) through 32 inches (813 mm), minimum 3/4 inch (19 mm) diameter] [For inside diameters above 32 inches (813 mm) through 44 inches (1,118 mm), minimum 1 inch (25 mm) diameter] [For inside diameters above 44 inches (1,118 mm) through 52 inches (1,321 mm), minimum 1-1/2 inches (38 mm) diameter] [For inside diameters above 52 inches (1,321 mm) through 72 inches (1,829 mm), minimum 2 inches (51 mm) diameter], continuous, [plated steel] [Type 304 stainless steel] rod.  Angle reinforced as required.
6.	Control Shaft:  Axle extends 6 inches (152 mm) beyond frame.
7.	Bearings:  Grease lubricated ball bearings mounted outboard of frame with adjustable packing gland shaft seals.

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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. 
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8.	Actuator:  [Manual, hand quadrant] [Manual, __________ ] [Electric, 120 V, 60 Hz, [two-position] [modulating], [spring-return] [drive both ways]] [Electric, __________ ] [Pneumatic, 80 psi (552 kPa) supply air pressure, [two-position] [modulating], [spring-return] [double-acting]] [Pneumatic, __________ ].
9.	Blade Seals:  Field adjustable and replaceable.  Mechanically attach blade seals to blade with full circumference retainer ring.  [Neoprene blade seals, maximum 250 degrees F (121 degrees C)] [Silicone blade seals, maximum 400 degrees F (204 degrees C)].

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Specifier Notes:  Standard finish is prime coat and finish coat of bonded industrial epoxy enamel.  Consult Ruskin for assistance in specifying special materials and finishes for specific applications.
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10.	Finish:  Prime coat and finish coat of bonded industrial epoxy enamel.
11.	Maximum Operating Temperature:  [250 degrees F (121 degrees C)] [ __________ ].
12.	Assembly:  Factory assemble damper components.

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Specifier Notes:  Dampers may tolerate higher temperatures, pressures, and velocities than those specified.  Consult Ruskin when a damper is to be applied in conditions exceeding recommended maximums.
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B.	Performance Data for Damper Diameter of 72 inches (1,829 mm):
1.	Maximum System Pressure:  15.0 inches w.g. (3.7 kPa).
2.	Maximum System Velocity:  7,000 feet per minute (2,133 m/min).
3.	Leakage:  Based on pressure differential of 10 inches  w.g. (2.5 kPa).
a.	Total Leakage Based on Blade Circumference:  6.56 cubic feet per minute (0.185 m3/min).

C.	Performance Data for Damper Diameter of 12 inches (305 mm):
1.	Maximum System Pressure:  20.0 inches w.g. (5.0 kPa).
2.	Maximum System Velocity:  7,000 feet per minute (2,133 m/min).
3.	Leakage:  Based on pressure differential of 10 inches  w.g. (2.5 kPa).
a.	Total Leakage Based on Blade Circumference:  1.09 cubic feet per minute (0.03 m3/min).

PART 3	EXECUTION

3.1	EXAMINATION

A.	Inspect 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.

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Specifier Notes:  Consult Ruskin for dampers with axle orientation other than horizontal.
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B.	Install dampers round and free from distortion with axle running horizontally.

END OF SECTION