RVV Variable flow rate controllers

CONTENTS Variable flow rate controllers, type RVV Description 2 Dimensions and product code 3 Variable flow rate controllers, type RVV-D Description 14 Variable flow rate controllers, type RVV-DL Description 26

Variable flow rate controllers, type RVV Description Flow rate controllers type RVV are elements designed to regulate the air volume which passes through it. The RVV casing is of circular shape with diameters from 100 to 400 mm, corresponding to the normalised diameters for circular ducts. The volume control damper, with its elliptical shape and sealing gasket in its entire periphery, and installed in the circular inlet, is the most adequate to obtain maximum linearity in damper actuation and a reduced sound level. RVV In the inlet duct a cross-shaped probe is installed which measures the differential...

Q = air flow rate in m3/h C = constant (see table) Pd = differential pressure at probe in Pa. Installation conditions In order to obtain a correct reading with the differential pressure probe a minimum uniform air distribution at the inlet of the RVV unit is required. For this reason the minimum distances indicated in the figures are recommended, both for a RVV controller close to a T-piece as well as close to a 90° elbow.

Selection tables In the following tables (1 to 10) all data are presented which are necessary for a correct selection of the variable flow rate controllers RVV. Determination of sound power regenerated by the RVV. Datos comunes para todas las tablas: 0 (mm): Diameter of the circular inlet duct connection. Pmin (Pa): Minimum pressure at the inlet of the RVV, equivalent to the pressure loss of the box with the damper fully open. Q(m3/h) (l/s): Air flow rate for which the unit is to be Table n°1 In this table the sound pressure level in the room, due to the noise regenerated by the RVV...

- Variable flow rate controllers type RVV (Sound pressure levels in dB(A))

- Variable flow rate controllers type RVV (Sound pressure levels in NR)

Selection tables - Variable flow rate controllers type RVV (Sound power levels in dB)

Selection tables - Variable flow rate controllers type RVV (Sound power levels in dB)

Series RVVSelection tables Table 6- Variable flow rate controllers type RVV (Sound pressure levels in NC) RVV Radiated noise

Series RVVSelection tables Table 7- Variable flow rate controllers type RVV (Sound pressure levels in NR) RVV Radiated noise

Selection tables- Variable flow rate controllers type RVV (Sound power levels in dB) RVV Radiated noise

Series RVVSelection tables - Variable flow rate controllers type RVV (Sound power levels in dB) RVV Radiated noise

Series RVVVariable flow rate controllers, type RVV-D Description The RVV-D is a variable flow rate controller similar to the RVV, with the only difference of having a double skin casing with acoustic isolation material. Therefore, only the exterior dimensions and radiated noise levels will be modified. Variable flow rate controller with acoustic isolation Indicate size from 80 to 630 For calibration of the RVV-D maximum and minimum air flow rates should also be indicated.

Series RVVSelection tables The following tables (11 to 20) correspond to the regenerated and radiated noise for the RVV-D unit according to the same conditions indicated for the RVV. Table n°10 In this table the sound pressure level in the room, due to the noise regenerated by the RVV-D unit, is given in dB(A) for various air flow rates and for pressures from 100 to 1000 Pa. To obtain these values a 10 dB/octave attenuation has been assumed for discharge duct, diffuser and room. Table n°11 In this table the sound pressure level in the room is given expressed in NC (value of the NC curve corresponding...

Series RVVSelection tables Table 10 - Variable flow rate controllers type RVV-D (Sound pressure levels in dB(A))

Series RVVSelection tables -Variable flow rate controllers type RVV-D (Sound pressure levels in NC) RVV-D Regenerated noise

Series RVVSelection tables Table 12 - Variable flow rate controllers type RVV-D (Sound pressure levels in NR)

Series RVVSelection tables - Variable flow rate controllers type RVV-D (Sound power levels in dB) RVV-D Regenerated noise

Selection tables - Variable flow rate controllers type RVV-D (Sound power levels in dB)

Series RVVSelection tables Table 15- Variable flow rate controllers type RVV-D (Sound pressure levels in dB(A)) RVV-D Radiated noise

Series RVVSelection tables Table 16- Variable flow rate controllers type RVV-D (Sound pressure levels in NC) RVV-D Radiated noise

Series RVVSelection tables Table 17- Variable flow rate controllers type RVV-D (Sound pressure levels in NR) RVV-D Radiated noise

Selection tables- Variable flow rate controllers type RVV-D (Sound power levels in dB) RVV-D Radiated noise

Series RVVSelection tables- Variable flow rate controllers type RVV-D (Sound power levels in dB) RVV-D Radiated noise

Series RVVVariable flow rate controller, type RVV-DLDimensions Description The RVV-DL is a variable flow rate controller similar to the RVV-D, i.e with double skin and acoustic isolation, but with an increased casing length, thus improving the acoustical characteristics of the unit. Therefore, only the exterior dimensions and noise levels will be modified. RVV-DL Variable flow rate controller with acoustic isolation, extended casing Sizes Indicate size from 80 to 630 For calibration of the RVV-DL maximum and minimum air flow rates should also be indicated. RVV-DL with silencer ASK-1

Series RVVSelection tables The following tables (21 to 30) correspond to the regenerated and radiated noise for the RVV-DL unit according to the same conditions indicated for the RVV. Table n°20 In this table the sound pressure level in the room, due to the noise regenerated by the RVV-DL unit, is given in dB(A) for various air flow rates and for pressures from 100 to 1000 Pa. To obtain these values a 10 dB/octave attenuation has been assumed for discharge duct, diffuser and room. Table n°21 In this table the sound pressure level in the room is given expressed in NC (value of the NC curve corresponding...