Technical Brochure Variable flow rate controllers VRE Round, made of steel or PPs

Technical brochure ♦ Variable flow rate controllers VRE, round Content Page Flow rate control basics 3 Measuring principle VRE, control accuracy, 4 Installation position, inflow distances Views of unit, application, configuration, mode of 5 operation, materials and finishes, accessories and special versions, connection Control, application ranges and limits, selection 6 Dimensions, weight 7 Airborne sound transmission 10 Casing sound emission 11 Nomenclature, ordering code 13 Views of unit, application, configuration, mode of 14 operation, materials and finishes, accessories and special versions,...

Technical brochure  Variable flow rate controllers VRE, round Flow Rate Control Basics – Which Product for which Application? Plant types Variable Flow Rate Constant Flow Rate Units with variable flow rates (VVS) use electronic flow rate controllers providing the room with exactly the required air volume – according to function and energy efficiency. Units with constant flow rates (KVS) use flow rate controllers maintaining a constant flow rate me chanically system-powered. Working with no wiring or external power supply, they provide convenient and cost-saving solutions. Measuring Methods Dynamic...

Technical brochure  Variable flow rate controllers VRE, round Measuring priciple VRE Control accuracy The continual constriction in the cross-section of a measur ing orifice with defined aperture ratio creates a static differ ential pressure (= active pressure) between the inflow and outflow sides during air flow. Deviations from the set value: ± 5 % of Vnenn (10 m/s) With this method the flow rate depends only on the active pressure. The active pressure is tapped in front of and behind the ori fice using a pair of measuring tappings (plus and minus pressure tapping). Since it is not the dynamic...

Technical brochure  Variable flow rate controllers VRE, round Type VRE-./…/S, made of steel Views of unit The damper blade closes air-tight in accordance with DIN EN 1751, complete shut-off is also possible. To reduce sound emission, the flow rate controller can be optionally retrofitted with an insulating case and/or a si lencer. The mechanism is universally suitable for the attachment of various controller makes and combinations of controllers, sensors and actuators for specific applications too. The control components also differ here in the measuring principle (dynamic/static), in their...

Technical brochure ♦ Variable flow rate controllers VRE, round Type VRE-./.../S, made of steelControl Made bySauter, model ASV115CF132E (standard) - Electronic VAV compact controller, supply 24V AC/DC - Position-independent sensor with static measuring principle, suitable for aggressive media and contaminated air - Runningtimeof actuator 30...120 s parametrizable - Analog control with 0(2)...10 V - Control as switch command via two independent digital inputs (override controls CLOSE, OPEN, Vmin and Vmax with external potential-free switches is possible) - Feedback of actual value analog with...

Valid in conjunction with the Sauter model ASV115CF132E The necessary space for fitting, connection and mainte- compact controller (standard). With other control compo- nance work must be kept accessible nents, divergences are possible. With insulating case Nominal © LTG Aktiengesellschaft • GrenzstraRe 7 • 70435 Stuttgart • Germany Tel. +49 71 1 8201-0 • Fax +49 71 1 8201-720 • [email protected] • www.LTG.net Former editions are invalid • Subject to technical modifications

Technical brochure ♦ Variable flow rate controllers VRE, round Type VRE-./.../S, made of steelDimensions, weight - connection with flanges acc. to DIN 24154 row 1 Valid in conjunction with the Sauter model ASV115CF132E The necessary space for fitting, connection and mainte- compact controller (standard). With other control compo- nance work must be kept accessible. nents, divergences are possible. With insulating case * DN 500 and 630: insulating case can not be retrofitted © LTG Aktiengesellschaft • GrenzstraRe 7 • 70435 Stuttgart • Germany Tel. +49 71 1 8201-0 • Fax +49 71 1 8201-720 • [email protected]...

Valid in conjunction with the Sauter model ASV115CF132E The necessary space for fitting, connection and mainte- compact controller (standard). With other control compo- nance work must be kept accessible. nents, divergences are possible. With insulating case Nominal © LTG Aktiengesellschaft • GrenzstraRe 7 • 70435 Stuttgart • Germany Tel. +49 71 1 8201-0 • Fax +49 71 1 8201-720 • [email protected] • www.LTG.net Former editions are invalid • Subject to technical modifications

Technical brochure ♦ Variable flow rate controllers VRE, round Type VRE-./.../S, made of steelAirborne sound transmission with Apges = 150 Pa Nominal For other pressure differences and flow rates, the sound Apges - total pressure difference levels can be ascertained with our design program. fm - Octave mid-band frequency Lw - Sound power level Lwa - Sound power level, A-weighted LpA - Sound pressure level, A-weigted © LTG Aktiengesellschaft • GrenzstraRe 7 • 70435 Stuttgart • Germany VRE-eng-TP(11/16) Tel. +49 71 1 8201-0 • Fax +49 71 1 8201-720 • [email protected] • www.LTG.net Former editions are...

Technical brochure ♦ Variable flow rate controllers VRE, round Type VRE-./.../S, made of steelCasing sound emission with Apges = 150 Pa Nominal Casing sound emission data given in the chart refer 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. APges - total pressure difference fm - octave mid-band frequency Lw - sound power level Lwa - sound power level, A-weigted LpA - sound pressure level, A-weighted © LTG Aktiengesellschaft...