Rectangular Volume Control Dampers
D2 and D3 Series
D2 series is an ultra-low leakage control damper which includes blade and jamb seals. The D3 series is a general purpose damper intended for applications where low leakage performance is not necessary.
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| Table 1 | Table 2 | Table 3 | Table 4 | Table 5 | Table 6 | Table 7 | Table 8 | Table 9 |
| XX | X | X | X | XXXXXXXXX | XXXXXXXXX | X | X | X |
| Table 1 | Product Type |
| D2 | D642 (Class II Leakage, 3 V blade with seals) |
| D3 | D640 (Class III Leakage, 3 V blade without seals) |
| Table 2 | Blade Action |
| P | Parallel |
| O | Opposed |
| Table 3 | Frame |
| A | 16 gauge galvanized frame with galvanized |
| Table 4 | Axle Bearings and Seals Materials |
| A | Acetal Bearings /No Seal |
| B | Acetal Bearings/Vinyl Seal |
| C | Bronze Bearings/No Seal |
| D | Bronze Bearings / Vinyl Seal |
| Table 5 | Width |
| (006-072) | Standard Rectangular Damper Width |
| Table 6 | Height |
| (006-072) | Standard Rectangular Damper Height |
| Table 7 | Sizing |
| N | Nominal Sizing |
| Table 9 | Actuator Mounting |
| A | External LH Standard withoutjackshaft (may include jackshaft for larger sizes) |
| B | Internal LH Standard without jackshaft (may include jackshaft for larger sizes) |
| C | External RH Standard without jackshaft (may include jackshaft for lager sizes) |
| Size Range: Minimum Size: One Blade: |
6 in. wide by 6 in. high |
| Two Blade: |
6 in. wide by 10 in. high |
| Maximum Size: Single Section: |
48 in. wide by 72 in. high |
| Multiple Section: |
unlimited |
| Temperature Rating: |
180 F (82 C) maximum |
| Standard Construction: Blade: |
16 gauge galvanized steel 3-V |
| Action: |
Parallel or Opposed |
| Frame: |
16 gauge galvanized steel Hat-channel |
| Bearings: |
Synthetic (Acetal) |
| Linkage: |
Side linkage out of airstream (concealed in frame) |
| Axles: |
1/2 in. square plated steel |
| Jamb Seals: |
Compression-type Stainless Steel |
| Blade Edge Seals: |
Extruded Vinyl |
