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DRFactive

Product catalog summary

Overview
The document introduces the DRFactive pressure controller, designed for differential pressure control in ventilation and air conditioning systems. It highlights features such as low air leakage rates, housing tightness, and energy-efficient operation with a wide measuring range and high accuracy.

Specifications
- Air Leakage Rate: Class 4 according to DIN EN 1751 (Class 3 for DN 100/125).
- Housing Tightness: Class C according to DIN EN 1751.
- Measuring Range: 1 to 10 m/s with accuracy of ±5% (Vnom) to ±15% (Vmin).
- Materials: Galvanized steel housing and damper blade, POM plastic bearings, EPDM seals.
- Options: Powder-coated or stainless steel surfaces, insulation shell, integrated air flow measuring device.

Functionality
The DRFactive combines pressure control and air flow measurement in a single unit, using a differential pressure method for high accuracy even at low velocities. It includes a control device with a differential pressure sensor and actuator, and an air flow measuring device.

Installation and Placement
Installation requires a straight inflow path of at least two to three times the height or width of the air duct. Pressure readings should avoid disturbances, and the pressure tap must be installed on a straight air pipe.

Dimensions and Weight
Detailed dimensions and weights are provided for various configurations, with and without insulation shells.

Technical Data
- Flow Velocity Measuring Range: 1 to 10 m/s.
- Operating Temperature: 0 to 50°C.
- Air Flow Range: 272 to 17,280 m³/h.
- Measuring Range: 0 to 300 Pa.
- Power Supply: 24 V AC/DC with a power consumption of 3.6 W.

Controller Components
The DRFactive includes a pressure controller and air flow transducer, with options for analog and Modbus RTU outputs. It features manual adjustment capabilities and safety measures such as IP 54 protection class.

Application Example
An example of a ventilation system using the DRFactive for supply air pressure control with additional air flow measurement is provided, highlighting its integration into complex systems.

Nomenclature and Order Code
The document outlines the order code structure for specifying the DRFactive, including series, measuring principle, dimensions, design, insulation shell, and control component.

Conclusion
The DRFactive is a versatile and efficient solution for pressure control and air flow measurement in ventilation systems, offering high accuracy, energy savings, and flexible installation options.

Technical Document Summary: LTG Comfort Air Technology

Specifications:
The document provides detailed specifications for various air distribution products, including variable air flow controllers (VAV), constant air flow controllers (KVS), pressure controllers, silencers, and highly airtight shut-off dampers. These products are available in both round and rectangular designs, catering to different applications such as room air applications, laboratories, and pharmaceutical industries.

Procedures:
Conversion to other sizes is performed at the same choke point from flow velocity and pressure loss using specified ΔL values. The document includes tables for sound power levels (LW), A-weighted sound power levels (LWA), and sound pressure levels (LpA).

Norms and Standards:
The document adheres to technical standards and is subject to changes. Previous editions are invalid, ensuring that the latest technical specifications are always in use.

Recommendations:
For special requirements, products with custom drives, static measurement, spring return, or high-speed models are recommended. The document also suggests using products with plastic housing for specific industries like laboratories and pharmaceuticals.

Key Data from Tables:
The tables provide data on airborne sound transmission without a silencer, detailing nominal width and height, and the corresponding sound level adjustments for different air flow controllers and duct configurations.

Contact Information:
LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart, Germany. Tel: +49 711 8201-0, Email: [email protected], Website: www.LTG-AG.com

Catalog excerpts

Let‘s realize the potential of air for a sustainable world Technical brochure Pressure controller with air flow feedback DRFactive The DRFactive is ideal for applications with limited space, low air velocities, high measurement accuracy requirements, and when pressure control and air flow measurement need to be combined in a single unit. Differential pressure control up to 1000 Pa Air leakage rate according to DIN EN 1751, class 4 (DN 100/125: class 3) Housing tightness class C according to DIN EN 1751 Short installation lengths due to measurement at the damper blade Low pressure losses: energy savings, quiet operation Large measuring range: 1...10 m/s Measuring accuracy: ±5% (Vnom ) to ±15% (Vmin ) Retrofittable insulation shell

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Contents Page Area of application, structure, mode of operation, features, materials/surfaces, options, accessories 3 Air flow ranges, minimum pressure differences, function 4 Ventilation systems with pressure controllers 8 Nomenclature, order code 9 Technical data, controller components 10 © LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart , Germany Tel. +49 711 8201-0, Fax +49 711 8201-720, [email protected], www.LTG-AG.com Previous editions are invalid. Subject to technical changes.

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Application range - DRFactive pressure controller for line pressure control in air pipes of ventilation and air conditioning systems - Ensures equal inlet pressure at downstream components (e.g., air flow controllers, induction units, air diffusers) - Measured value can be used for fan speed control (bad point control) -Air flow measurement for recording and feedback of the air air flow. Feedback signal can be used for display or master-slave applications - Optional: Full shut-off possible - Housing with...

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Vmin - Minimum air flow = lower control limit Vnom - Nominal air flow Apmin - Minimum pressure loss How does the DRFactive work? DRFactive makes it possible to regulate pressure and measure air flow precisely at the same time. The advantage is that, with open extract air, the actual air flow can be measured and extracted almost identically. Two electrical components are integrated for this purpose: one measures the air flow directly at the damper, while the other measures the pressure at a freely selectable...

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Installation, placement With duct or duct pressure control, the pressure is measured relative to the ambient pressure. One connection of the sensor remains open („+“ for extract air, „–“ for supply air), while the other connection is connected to the measuring point. The pressure at the measuring point is controlled in the direction of air flow behind the DRFactive in the supply air or in front of the DRFactive in the exhaust air. The pressure tapping point must be connected to the differential pressure...

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Dimensions, weight Type DRFactive/.../-/L/GUAC, without insulation shell Type DRFactive/.../D/L/GUAC, with insulation shell © LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart , Germany Tel. +49 711 8201-0, Fax +49 711 8201-720, [email protected], www.LTG-AG.com Previous editions are invalid. Subject to technical changes.

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular © LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart , Germany Tel. +49 711 8201-0, Fax +49 711 8201-720, [email protected], www.LTG-AG.com Previous editions are invalid. Subject to technical changes.

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Ventilation systems with pressure controllers (example) Pressure controller DRFactive, with integrated air ow measurement Variable air ow controller VRFactive Pressure measuring point Variable air ow controller VREactive Air diffuser combination LWK with integrated sound insulation Air diffuser combination LWK with integrated sound insulation Air diffuser combinations LWK with integrated sound-absorbing baffle Office room Office room Meeting room Application example DRFactive: Supply air pressure controller...

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Please specify when ordering: Air flow feedback signal: Mode 0...10 V or 2...10 V - Modbus or analog control Without this information, the following factory settings will be delivered: - Mode 0...10 V - Analog control Ordering example DRFactive 600x200/S/D/GUAC, Pmin = 150 Pa, Pmax = 300 Pa, Mode 2...10 V, analog control © LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart , Germany Tel. +49 711 8201-0, Fax +49 711 8201-720, [email protected], www.LTG-AG.com Previous editions are invalid. Subject to technical...

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LTG Comfort Air Technology | Technical brochure Pressure controller DRFactive, rectangular Δptotal = 100 Pa Flow velocity [m/s] Nominal width B [mm] Nominal height H [mm] Airborne sound transmission without silencer - Total pressure difference - Center frequency of the octave bands - Sound power level - Sound power level, A-weighted - Sound pressure level, A-weighted Conversion to other sizes is carried out at the same choke point from flow velocity and pressure loss using the ΔL values in the following table. The values refer to the respective nominal height H. LW Oct = LW Table + ΔL LWA = LWA...

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DRFactive

DRFactive

Catalog excerpts

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