RQ

RQ

RQ

Product catalog summary
Application
The Roccheggiani RQ Series rectangular constant volume flow controllers are designed for use in duct systems to maintain a constant air flow rate despite variations in system pressure. The flow can be manually calibrated using an external scale.
Functioning
The RQ Series controllers feature an automatic actuator that operates without auxiliary power, maintaining a constant air flow within a specified range of differential pressures. The system functions reliably from a minimum pressure difference, dependent on air velocity, up to a maximum of 1000 Pa, with a flow rate variation tolerance of ±10%.
Construction Characteristics
The controller housing is made from galvanized sheet metal. The control plate is supported by two maintenance-free bearings to prevent vibration and ensure precise regulation.
Adjustment
Controllers are pre-calibrated according to customer specifications. Adjustments can be made using a 2mm Allen key to set the flow within the desired range.
Accessories
Optional 30 mm heat and noise insulation is available for the controllers.
Dimensional Data
The document provides a table with dimensions and flow rates for various sizes of the RQ controllers, ranging from 200x100 mm to 600x300 mm, with corresponding minimum and maximum flow rates.
Performance Data
Graphs and tables detail the static pressure differences, air velocity, and noise levels generated by the controllers at different pressure drops (100 Pa, 250 Pa, 500 Pa) across various sizes and flow rates.
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Catalog excerpts

RQ-1

Applicazione II regolatore di portata Roccheg-giani Serie RQ e idoneo all'ap-plicazione in impianti a sezione rettangolare, ove sia necessario mantenere costante una portata d’aria a prescindere dalle variazio-ni di pressione del sistema. II valore di portata puo essere ta-rato manualmente con estrema facilita attraverso un settore graduate posto all'esterno del regolatore. Funzionamento Il regolatore di portata Serie RQ e dotato di un attuatore au-tomatico, che senza utilizzare energia ausiliaria, e in grado di mantenere costante il valore di portata dell’aria in un campo predefinito di pressioni differenziali. II regolatore funziona con elevata precisione gia con pressioni differenziali minime, che dipendono dalla velocita dell’aria, fino a pressioni differenziali di 1000 Pa. La variazione di portata rientra in una tolleranza di ± 10 %. Caratteristiche costruttive L’involucro e costituito da lamiera di acciaio zincato. L'aletta di regolazione e supportata da due cuscinetti a basso attrito che non richiedono manutenzione, per prevenire I’insor-genza di vibrazioni e oscillazioni e garantire una regolazione fine. Regolazione I regolatori di portata sono forniti pretarati secondo le specifi-che richieste dal cliente. Per mezzo di una chiave a brugola da 2 mm, la portata puo essere facilmente regolata all'interno del range richesto dal cliente. Accessori Application Volume flow controllers Roccheggiani RQ Serie, are used to regulate automatically a required air flow in rectangular ducts. Their task is to keep a default nominal value of the volume flow regardless of the varying pressure in the duct. The air flow can be easily calibrated manually using the scale on the outside of the regulator. Functioning The RQ Series constant volume flow controllers have an automatic actuator that, without the use of auxiliary power, is capable of maintaining the air flow constant within a predefined field of differential pressures. The controller operates reliably from a minimum pressure difference, which depends on the air velocity, to a maximum pressure difference of 1000 Pa. The flow rate variation is usually within a tolerance of ± 10 %. Construction characteristics The housing of the controller is made from galvanized sheet. The control plate is supported by two bearings, which are maintenance-free and smooth-running, to prevent the control plate from vibrating and oscillating and to guarantee fine regulation. Adjustment The air volume controllers are supplied ready-calibrated in line with customer specifications. By using a 2mm Allen key, the air flow can easily be regulated within the range requested by the customer. Accessories The volume flow controllers can be delivered with 30 mm heat and noise insulation. Il regolatore di portata puo essere fornito con isolamento acu-

 Open the catalog to page 1
RQ-2

Regolatore manuale rettangolare a portata costante Rectangular constant volume flow controller RQ AP Minima sul regolatore Minimum static pressure difference at the controller Rumore generato dal regolatore/Air flow noise generated by the controller

 Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.