Flow Rate Controller Type VRD-W (short) LTG Aktiengesellschaft D - 70435 Stuttgart, Grenzstraße 7 +49 (0711) 82 01-0, Fax +49 (0711) 82 01-720 Internet: http://www.LTG-AG.de E-Mail: info@LTG- AG.de - LTG Incorporated 105 Corporate Drive, Suite E Spartanburg S.C., 29303 USA +1 (864) 599- 6340, Fax +1 (864) 599- 6344 Internet: http://www.LTG-INC.net E-Mail: info@LTG- INC.net -

Components for Room Air Technology Germany Central Office (Frankfurt) Sales area: PLZ 54, 55, 60, 63, 64, 66-69, 97 Sontraer Str. 27 D-60386 Frankfurt am Main (069) 94 20 19-14, Fax -10 E-mail: [email protected] Central office (Herborn) Sales area: PLZ 30, 31, 34-38, 56, 57, 61, 65 Sperberweg 16 D-35745 Herborn Herr Hartmann (02772) 570-725, Fax -727 E-mail: [email protected] Eastern office (Berlin) Sales area: PLZ 10-25, 29, 39 Eisenhutweg 51a D-12487 Berlin Herr Linke (030) 63 22 87-74, Fax -75 E-mail: [email protected] Eastern office (Chemnitz) Sales area: PLZ 01-09, 98, 99 Johannes-Ebert-Straße...

Flow Rate Controller VRD-W (short) Application Accessories and Special Versions The compact flow rate controller unit VRD- W works with auxiliary power and controls the flow rate independent of the initial pressure in two parallel air lines as follows: The flow rate is measured and controlled based on set values, either on the air inlet side (air inlet side controlled ventilation) or on the air outlet side (air outlet side controlled ventilation). The other non- measured air flow is controlled synchronously because of the rigid mechanical connection between the two dampers. This also ensures...

Flow Rate Controller VRD-W (short) Design and Characteristics Installation Conditions The damper has an oval blade of galvanized sheet steel with an EPDM seal meeting DIN EN 1751 Class 3, for ”near gas- tight” sealing of the closed blade. - A straight, undisturbed inflow distance of 1- 3xD(mm) in front of the flow rate controller is required. There are, however, no restrictions regarding the outflow side. Please ensure indicated positioning of the measuring nipples with respect to the air flow. Avoid turbulent air flow and short radius bends or T- branches before the damper. The damper is positioned...

Flow Rate Controller VRD-W (short) Dimensions and Weights B Version without insulating case Version with insulating case Version without insulating case Version with insulating case Weight [kg] Damper angle [º] without insulating case with insulating case E LTG Aktiengesellschaft ⋅ Grenzstraße 7 ⋅ D-70435 Stuttgart ⋅ +49 (0711) 8201-0 Fax -720 Internet: http://www.LTG-AG.de ⋅ E-Mail: [email protected] ⋅ Printed in Germany Former editions are invalid ⋅ Subject to technical modifications.

Flow Rate Controller VRD-W (short) Acoustic Data, Airborne Sound Transmission* 1m p is the pressure loss across the air flow controller including a 1 m pipe Chart: Airborne Sound Transmission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air) the following applies: LW total = LW from the chart + 3 dB, with assumed identical sound source levels, e.g. if the air speed and pressure loss in the inlet and outlet ducts are identical. E LTG Aktiengesellschaft ⋅ Grenzstraße 7 ⋅ D-70435 Stuttgart ⋅ +49 (0711) 8201-0 Fax -720 Internet: http://www.LTG-AG.de...

Flow Rate Controller VRD-W (short) Acoustic Data, Airborne Sound Transmission* 1m p is the pressure loss across the air flow controller including a 1 m pipe Chart: Airborne Sound Transmission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air) the following applies: LW total = LW from the chart + 3 dB, with assumed identical sound source levels, e.g. if the air speed and pressure loss in the inlet and outlet ducts are identical. E LTG Aktiengesellschaft ⋅ Grenzstraße 7 ⋅ D-70435 Stuttgart ⋅ +49 (0711) 8201-0 Fax -720 Internet: http://www.LTG-AG.de...

Flow Rate Controller VRD-W (short) Acoustic Data, Airborne Sound Transmission* 1m p is the pressure loss across the air flow controller including a 1 m pipe Chart: Airborne Sound Transmission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air) the following applies: LW total = LW from the chart + 3 dB, with assumed identical sound source levels, e.g. if the air speed and pressure loss in the inlet and outlet ducts are identical. E LTG Aktiengesellschaft ⋅ Grenzstraße 7 ⋅ D-70435 Stuttgart ⋅ +49 (0711) 8201-0 Fax -720 Internet: http://www.LTG-AG.de...

Flow Rate Controller VRD-W (short) Acoustic Data, Casing Sound Emission (for non-insulated casing)* 1m p is the pressure loss across the air flow controller including a 1 m pipe < ≙ <15 dB Casing sound emission data given in the chart refers to the emitting jacket surface of a duct of galvanized sheet steel, total length 6 m, with the flow rate controller installed. Due to resonance effects given frequency- related sound power level data may vary by +/- 6 dB max. Chart: Casing sound emission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air)...

Flow Rate Controller VRD-W (short) Acoustic Data, Casing Sound Emission (for non-insulated casing)* 1m p is the pressure loss across the air flow controller including a 1 m pipe < ≙ <15 dB Casing sound emission data given in the chart refers to the emitting jacket surface of a duct of galvanized sheet steel, total length 6 m, with the flow rate controller installed. Due to resonance effects given frequency- related sound power level data may vary by +/- 6 dB max. Chart: Casing sound emission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air)...

Flow Rate Controller VRD-W (short) Acoustic Data, Casing Sound Emission (for non-insulated casing)* 1m p is the pressure loss across the air flow controller including a 1 m pipe < ≙ <15 dB Casing sound emission data given in the chart refers to the emitting jacket surface of a duct of galvanized sheet steel, total length 6 m, with the flow rate controller installed. Due to resonance effects given frequency- related sound power level data may vary by +/- 6 dB max. Chart: Casing sound emission * Data given refers to the duct with installed compact controller. For both ducts (inlet + outlet air)...