The 9-19 high pressure centrifugal fan is designed for industrial air systems where pressure demand and system resistance are the primary selection factors. Typical duties include forced air supply, boiler forced draft, combustion support, pneumatic conveying and process equipment air delivery.
Smaller models use A-type direct drive arrangements, while larger models use D-type coupling drive arrangements. Final selection should be based on airflow and total pressure at the same operating point, then checked against speed, motor load, medium condition, rotation, discharge angle and installation interface.
High Pressure Fan for Forced Air and High-Resistance Systems
The 9-19 series is intended for systems where ordinary ventilation fans may not provide sufficient pressure to overcome duct resistance, equipment resistance, filters, dampers, bends or process restrictions.
For replacement projects, an existing nameplate, motor plate, performance curve and general arrangement drawing can help identify the original fan configuration. However, motor power or model number alone should not be used as the final selection basis.
Representative 9-19 Performance Parameters
Representative catalogue ranges are shown to establish the available duty level. The complete catalogue contains multiple operating points for each fan size.
| Model | Drive | Speed r/min |
Catalogue Airflow m³/h |
Total Pressure Pa |
Listed Motor Options kW |
|---|---|---|---|---|---|
| 4A | A | 2900 | 824–1,704 | 3,253–3,665 | 2.2–3 |
| 5A | A | 2900 | 1,610–3,488 | 5,080–5,768 | 5.5–11 |
| 6.3A | A | 2900 | 3,220–6,978 | 8,148–9,265 | 15–30 |
| 7.1D | D | 2900 | 4,610–9,988 | 10,426–11,868 | 37–55 |
| 10D | D | 1450 | 6,440–15,455 | 4,958–5,941 | 22–37 |
| 12.5D | D | 960 | 8,327–19,985 | 3,377–4,043 | 18.5–37 |
Match the Fan Curve to the Actual System Resistance
Long ducts, elbows, filters, dampers, furnace passages and process equipment all create pressure loss. A high-pressure fan should therefore be selected from the required operating point rather than from motor power or fan number alone.
Typical 9-19 High Pressure Fan Applications
9-19 Engineering Drawings and Representative Dimensions
Read the engineering drawing first, then use the matching table directly below it. The drawing defines each dimension code; the tables provide representative 9-19 catalogue values in millimetres.
Representative A-Type Installation Dimensions
Dimension codes correspond directly to the drawing above. Values are in mm except hole and bolt specifications.
| Model | D1 | D2 | D3 | A1 | A2 | A3 | E | G | M | N | Inlet / Outlet Holes | Foundation Bolt |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4A | Φ180 | Φ205 | Φ230 | 128 | 160 | 182 | 100 | 599 | 718 | 420 | 8×Φ7 / 14×Φ7 | M12×300 |
| 5A | Φ224 | Φ254 | Φ284 | 160 | 192 | 214 | 126 | 743 | 868 | 500 | 8×Φ7 / 14×Φ7 | M12×300 |
| 6.3A | Φ280 | Φ320 | Φ360 | 202 | 236 | 258 | 157 | 936 | 1085 | 620 | 8×Φ10 / 14×Φ7 | M16×400 |
Representative D-Type Installation Dimensions
Representative No.7.1D, No.10D and No.16D values show the dimensional progression across the larger D-type range.
| Model | D1 | D2 | D3 | A1 | A2 | A3 | E | G | L | M | H | Inlet / Outlet Holes | Foundation Bolts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7.1D | Φ315 | Φ355 | Φ395 | 227 | 270 | 293 | 177 | 1051 | 1230 | 1278 | 280 | 8×Φ10 / 14×Φ10 | M24×630 / M20×500 |
| 10D | Φ450 | Φ500 | Φ550 | 320 | 360 | 386 | 250 | 1472 | 1317 | 1748 | 280 | 8×Φ12 / 18×Φ10 | M24×630 / M20×500 |
| 16D | Φ710 | Φ770 | Φ830 | 512 | 574 | 621 | 400 | 2351 | 2091 | 2735 | 500 | 16×Φ12 / 24×Φ12 | M36×1000 / M30×800 |
Information Needed for 9-19 Fan Selection
Continue from Product to Application and Selection
9-19 High Pressure Centrifugal Fan FAQ
Typical applications include forced air supply, boiler forced draft, combustion support, pneumatic conveying and industrial process systems with relatively high resistance.
Confirm airflow and required pressure at the same operating point first, then check fan size, speed, motor load, medium condition, rotation direction, discharge angle and installation arrangement.
The No.4–6.3 group uses A-type arrangements, while No.7.1–16 uses D-type coupling-drive arrangements. Their mechanical layouts, foundations and installation dimensions are different.
The full catalogue contains many operating points and dimensional rows. Representative data makes the product page easier to evaluate while retaining the key engineering values needed for preliminary selection.
Yes. Send the existing fan nameplate, motor data, airflow and pressure, performance curve if available, rotation, outlet angle and installation drawing or interface dimensions.
No. Catalogue dimensions are for preliminary engineering reference. The final production drawing should be confirmed after fan size, motor, rotation direction, outlet angle and project interface are finalized.
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