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Catalogue PHZE

Catalogue PHZE

Product catalog summary

Introduction
The document outlines the technical specifications and data for the PHZe series of acoustic louvres, designed to mitigate noise from openings such as engine rooms or industrial areas. These louvres are made from galvanized steel or powder-coated materials and are available in four depths: 200, 300, 400, and 600 mm.

Specifications
The acoustic louvres are filled with sound-absorbing material and covered with a perforated metal plate for enhanced effectiveness. They include bird protection grids as standard. Installation dimensions are slightly smaller than the opening to facilitate easy installation.

Technical Data

Dimensions: Widths range from 200 mm to 2500 mm, heights from 350 mm to 2500 mm, and depths of 200 mm, 300 mm, 400 mm, and 600 mm.
Materials: Options include zinc-coated metal, aluminum, stainless steel, and finishes like brass or copper.
Color Finish: Standard RAL 9010 (white) with the full RAL range available.

Acoustic Parameters
The document details the attenuation capacity of the louvres across various frequencies, with specific data for each depth. For instance, the 200 mm depth louvre provides attenuation ranging from 4 dB at 63 Hz to 14 dB at 8000 Hz.

Installation and Usage
Louvres can be installed directly or with a frame as an end piece of an air duct. Guidelines are provided for the number of wall brackets required based on the louvre's width.

Performance Calculations
Detailed calculations are provided for determining acoustic pressure and noise dispersion, considering factors like air flow, louvre self-noise, and pressure loss. An example calculation illustrates the methodology.

Conclusion
The PHZe acoustic louvres offer versatile solutions for noise reduction in industrial settings, with customizable options to meet specific requirements. The document emphasizes using the manufacturer's software for precise selection and planning based on noise conditions.

Noise Dampers Overview
The document provides technical specifications and installation guidelines for noise dampers, specifically the Glideflow - GDE model. It includes details on the placement of noise dampers in ducts or construction openings, as well as the assembly and anchoring of these dampers.

Specifications
The document outlines various types of dampers, including GD (with resonators), GDE (absorption), GDH (with resonators, hygienic design), GDHE (absorption, hygienic design), and GDX (other designs with temperature resistance and stainless steel options). Dimensions for width, height, and length are provided, with examples of damper configurations.

Noise Levels
Noise levels are detailed across different frequencies (32 Hz to 8000 Hz) and air velocities (3 m/s to 19 m/s). The document provides data on the inherent noise of the dampers and the resulting noise levels after installation.

Calculation Example
An example calculation is provided for a ventilation unit with a flow rate of 9000 m3/h and a duct velocity of 5 m/s, using GDE 200 dampers. The requirement is to achieve a noise level of 65 dB behind the damper, which is met with a result of 64 dB(A).

Installation Guidelines
Installation involves using self-tapping screws or rivets, ensuring precise placement and spacing between dampers. The document specifies that GDE dampers should not be installed horizontally.

Performance and Testing
The document highlights that the Glideflow dampers have significantly lower inherent noise compared to standard designs, achieved through a special aerodynamic shape. Noise measurements are conducted according to CSN ISO 7235 by an accredited acoustic laboratory.

Additional Information
Technical changes are reserved, and further details can be found on the company's website.

Catalog excerpts

acoustic louvres

Open the catalog to page 1

Bird protection grid in detail: Acoustic louvres "PHZE" are made of plain galvanized steel or powder coated RAL (stainless steel or AlMg3 available upon reques). The louvres are filled with sound absorbing material covered with perforated metal plate for increased effectivity. There are 4 different depths available according to desired attenuation. The air inlets are equipped with bird protection grids as standard. Construction angle of the sound absorbing blades allows also the installation as an end piece of an air duct (direct installation or with a frame). Acoustic louvres are used for reduction...

Open the catalog to page 2

200 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by the...

Open the catalog to page 3

300 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by the...

Open the catalog to page 4

400 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by the...

Open the catalog to page 5

600 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by the...

Open the catalog to page 6

Methodics of designing acoustic louver Lv = desired accoustic pressure at defined point Lpv = oise dispersion in the air duct reduced by teh attenuation "D" n of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lwž(A) = Lw (diagram) + ∆ Lw + Lwa + Lwa oct Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= sound power level of the louvre at defined air stream speed right in front of the louvre R = distance...

Open the catalog to page 7

calculatioN Software In order to simplify the selection of the louvres and other insulating products based on the complex noise situation and the source of the noise, the manufacturer created the computer software Cell silencers JTHE VLASTNÍ HLUK TLUMIČŮ HLUKU Vlastní hluk tlumičů Glideow je s porovnáním s tlumiči standardní konstrukce výrazně nižší, který je zajištěn díky speciální aerodynamickému tvaru tlumiče. Vlastní hluk tlumičů hluku je měřen dle CSN ISO 7235 akreditovanou akustickou laboratoří. Uvedená data jsou platná pro 1m2 plochy. MONTÁŽ TLUMIČŮ DO POTRUBÍ - SPOJOVÁNÍ A KOTVENÍ TLUMIČE...

Open the catalog to page 8

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