Staircase Swirl Diffusers Type SD TROX GmbH Heinrich-Trox-Platz D-47504 Neukirchen-Vluyn

Contents · Description Description Construction · Dimensions Materials Installation · Fixing Nomenclature Spectral Data Acoustic Data Aerodynamic Data Order Details Type SD-Q-LQ-… Type SD-Q-LR-… Staircase swirl diffusers type SD are ideal for use in theatres, auditoria, concert halls, cinemas etc. They can be installed vertically in steps or in floors which do not carry foot traffic. The permitted supply air temperature difference is ±6 K. Staircase swirl diffusers can be used for horizontal or angled air flow depending on the requirements of the location.

Construction · Dimensions · Materials Construction Staircase swirl diffusers type SD are available in size 180 as standard (special construction down to size 158 possible). The staircase swirl diffuser is made from sheet steel, and the rear spigot and subframe are in galvanised sheet steel. The diffuser face is pre-treated and powder coated white (RAL 9010) and the rear spigot stove-enamelled black (RAL 9005). Depending on the architectural requirements, the staircase swirl diffuser can be made circular or square. To achieve a swirled flow, the diffuser face has four air outlet sections with...

Installation · Fixing Installation of Diffuser Face using a Spigot (fixing by others) Installation of Diffuser Face with a Subframe (fixing by others) Three pilot holes at 120° to each other are drilled in the stair covering. The diameter of the pilot holes depends on the type of stair covering. The parts supplied – centre screw, sleeve and subframe – these are assembled to the rear of diffuser and then the assembly fitted into the opening provided. The entire spigot assembly is fitted into the opening in the stair covering and firmly fixed at the edges using the wood screws provided. The centre...

Nomenclature Floor mounting: in l/s: Volume flow per diffuser in m3/h: Volume flow per diffuser in m: Installation height above floor in m: Distance from diffuser (L = h + X for stair mounting) in m: Height of measurement point above floor in m/s: Time average air velocity at height h1 above floor in K: Temperature difference between supply air and room air 1) in K: Difference between core temperature at height h1 above floor and room temperature 1) Stair mounting: in Pa: Total pressure drop in dB(A): A-weighted sound power level : A-weighting or NC rating respective of room sound pressure level...

Spectral Data · Acoustic Data Effective Outlet Area Construction Circular discharge face Square discharge face Spectral Data Octave band centre frequency Hz Sound power level and pressure drop Type SD-...-T Sound power level and pressure drop Type SD-...-S

Aerodynamic Data Angled Discharge The construction and arrangement of the seating can affect the aerodynamic data. Air velocity Type SD-...-LR-T · Stair fixing 0.40 m Temperature quotient Type SD-...-T · Stair fixing Air velocity Type SD-...-LQ-T · Stair fixing 0.40 m

Aerodynamic Data Angled Discharge The construction and arrangement of the seating can affect the aerodynamic data. Air velocity Type SD-...-LQ-T · Floor fixing 0.06 0.10 0.20 Temperature quotient Type SD-...-T · Floor fixing Air velocity Type SD-...-LR-T · Floor fixing

Aerodynamic Data Horizontal Discharge Example A multi purpose hall with 750 seats is to be fitted with stair swirl diffusers. A supply air quantity of 12,000 l/s is required. The volume flow will thus be ‡ = 16 l/s per diffuser. The stair swirl diffusers type SD-Q-LQ-S/size 180 will be installed vertically in the stairs. Mounting height above floor Distance from diffuser Height of measurement point above floor Supply air temperature difference Diagram 2: Sound power level and pressure drop LWA = 22 dB(A) (LWNC = 15 NC) ͬpt = 14 Pa Temperature quotient Type SD-...-S · Stair fixing The construction...

Order Details Order Code These codes do not need to be completed for standard products SD - Q - LQ - S Diffuser face Square Circular Discharge face Square Circular With spigot With subframe State colour Only available with square diffuser face! GE = Gloss level Make: Type: Standard finish powder-coated to RAL 9010 (GE 50%) 2 Powder-coated to RAL 9006 (GE 30%) 2) other colours to RAL . . . (GE 70 %) 2) Order Example Staircase swirl diffuser suitable for mounting vertically in stairs or in floors not carrying foot traffic, comprising circular or square diffuser face with either circular or square...