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12x12

48x12

24x24

36x36

12x48

R

Greenheck Fan Corporation certifies that the 

model SMD-301 shown herein is licensed to bear 
the AMCA Seal. The ratings shown are based on 
tests and procedures performed in accordance 
with AMCA Publication 511 and comply with 

the requirements of the AMCA Certified Ratings 
Programs. The AMCA Certified Ratings Seal 

applies to air performance ratings only.

AMCA 5.2 Pressure Drop 

SMD-301

5D

6D

5D

D

4 (W) (H)

3.14

Velocity  

(fpm) 

Pressure Drop       

(in. wg) 

Velocity  

(fpm) 

Pressure Drop       

(in. wg) 

Velocity  

(fpm) 

Pressure Drop       

(in. wg) 

Velocity  

(fpm) 

Pressure Drop       

(in. wg) 

Velocity  

(fpm) 

Pressure Drop       

(in. wg) 

500

0.03 

500

0.01 

500

0.01 

500

0.01 

500

0.02 

1000

0.12 

1000

0.06 

1000

0.06

1000

0.05

1000

0.08 

1500

0.26 

1500

0.12

1500

0.12

1500

0.12 

1500

0.18

2000

0.46 

 

 

2000

0.22

2000

0.22

2000

0.21 

2000

0.33

2500

0.72

2500

0.34 

2500

0.34

2500

0.33

2500

0.51

3000

1.04

3000

0.49

3000

0.49

3000

0.48

3000

0.74 

3500

1.41

3500

0.67

3500

0.67

3500

0.65

3500

1.00

4000

1.84

4000

0.87

4000

0.88

4000

0.85

4000

1.31 

12in. X 48 in. (305mm x 1219mm) 

48 in. x 12 in. (1219mm x 305mm) 

24 in. x 24 in. (610mm x 610mm) 

36in. x 36 in. (914mm x 914mm) 

12 in. x 12 in. (305mm x 305mm) 

 

 

 

 

 

* Sizes are in inches. 

Summary of Contents for Steel Airfoil Blades SMD-301M

Page 1: ...b seals Linkage Concealed in jamb Axles 1 2 in 13mm dia plated steel Bearings Bronze sleeve type Size Limitations Minimum Size 8 in W x 6 in H 203mm W x 152mm H Maximum Size Single Section 32 in W x 5...

Page 2: ...strates a fully ducted damper This configuration has the lowest pressure drop of the three test configurations because entrance and exit losses are minimized by straight duct runs upstream and downstr...

Page 3: ...ity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg 500 0 03 500 0 01 500 0 01 500 0 01 500 0 02 1000 0 12 1000 0 06 1000 0 0...

Page 4: ...Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg 500 0 01 500 0 01 500 0 01 500 0 01 500 0 01 100...

Page 5: ...Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg Velocity fpm Pressure Drop in wg 500 0 04 500 0 03 500 0 03 500 0 03 500 0 03 1000 0 18 1000 0 13 10...

Page 6: ...301 The standard A dimensions listed in the table provide adequate space for the mounting of actuators and controls If space constraints are a problem the A dimension can be varied between 53 8 in 13...

Page 7: ...r pneumatic type for 25 psi minimum 30 psi maximum operation Damper blades shall be of the double skin airfoil type and shall have an equivalent metal thickness of 14 ga 2mm Damper frame shall be galv...

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