Centrifugal fan DD 9/9 M96R 1F 4P 1V

The DD 9/9 M96R is part of Nicotra Gebhardt's DD series of DWDI (Double Width Double Inlet) centrifugal fans — one of Europe's leading manufacturers of industrial ventilation equipment. Unlike boxed or inline fans, the DD series is a bare fan without its own housing, designed exclusively for integration into larger equipment or installations.

What DWDI means

A DWDI fan draws air simultaneously from both sides of the impeller rather than from one side only (SWSI). Compared to single-inlet fans: higher airflow for the same rotor size, balanced axial forces extending bearing service life, quieter operation at equivalent airflow, and a superior airflow-to-footprint ratio.

Typical applications

The DD series is an integration component: air handling units (AHU) as the main air-moving element alongside heating/cooling coils and filters; ventilation plenums supplying multiple diffusers; professional kitchen hoods with external motor; acoustic enclosures (BOX type) for noise-sensitive commercial or residential applications; industrial drying, air conditioning and equipment cooling systems.

Construction

Forward-curved galvanised steel impeller. Single-phase 4-pole motor (~1,400 rpm at 50Hz) with integrated thermal overload protection, insulation class F (up to 155°C winding temperature), IP54 protection. Direct drive — no belt, no pulley, no periodic belt tension adjustment. Discharge direction configurable at installation — up, right, left or down — providing maximum flexibility for AHU builders and installers.

FAQ — EN

What airflow does the DD 9/9 M96R deliver? Exact airflow depends on the operating curve and the resistance of the installation it is integrated into. For precise specifications (maximum airflow, maximum pressure, Q-P curve) refer to the attached Nicotra Gebhardt technical data sheet or contact us for operating point selection.

Can it be installed without a housing? It is not recommended. The DD series is an integration component — without a housing it has no mechanical protection, no duct connection and does not meet safety requirements for standalone operation. It must always be installed inside an AHU, BOX enclosure or plenum.

What is the difference between DD (Nicotra Gebhardt) and BD or DDM (Casals)? BD (Casals) is an equivalent DWDI direct drive centrifugal fan with similar specifications. DDM (Casals) uses an external rotor motor (ERM). DD (Nicotra Gebhardt) is the equivalent range from the other brand imported by ventilation.ro. Choice depends on availability, exact specifications and integration project.

Is it compatible with a speed controller? Yes — the single-phase 4-pole motor is compatible with linear or stepped speed controllers matching the motor specifications. Verify that the chosen controller is compatible with single-phase capacitor motors. Contact us for a recommendation.

👉 BD 9/9 Casals centrifugal fan — similar alternative 👉 DDM 9/9 ERM fan — with external rotor motor 👉 Low-pressure centrifugal fans — complete range 👉 Speed controllers for single-phase motors 📞 +40 722 667 239 — free consultancy for fan selection and integration