*myaeroexpo

DRF

DRF

Product catalog summary

Overview
The DRF pressure controller is engineered for precise line pressure control in ventilation and air-conditioning systems, ensuring constant pressure in air ducts for optimized distribution and energy savings.

Specifications
- Controls differential pressure up to 1000 Pa.
- Leakage air rate: Class 4 (Class 3 for DN 100/125) per DIN EN 1751.
- Housing tightness: Class C per DIN EN 1751.
- Flexible installation with no specific flow path required.
- Low pressure losses for energy efficiency and quiet operation.
- Measuring range: 0 to 500 Pa, depending on version.
- Compact design with optional insulation shell.

Design and Construction
The DRF features a housing with a damper blade, a control unit with a differential pressure sensor and actuator, and an optional insulation shell for acoustic and thermal insulation. It is pre-assembled for easy installation and compatible with various duct connections.

Functionality
The controller measures static pressure via a pressure tap and adjusts the damper blade to maintain setpoint pressure, ensuring stable pressure distribution and efficient fan control.

Installation Guidelines
- Install with the damper axis in a horizontal position.
- Place pressure taps in straight duct sections to avoid disturbances.
- Adjust for height and hose length for the differential pressure sensor.

Technical Data
- Power supply: 24 V AC/DC.
- Power consumption: 3 W.
- Analogue and digital inputs/outputs for pressure setpoint and actual pressure value.
- Protection class: IP 54.
- Operating temperature: 0 to +50 °C.

Applications
Suitable for supply and extract air circuits in various settings, including open-plan offices and individual rooms, and can be integrated into systems requiring precise pressure control without direct airflow measurement.

Ordering Information
Order codes specify series, measuring principle, dimensions, design, insulation options, and control component type. Factory settings include a pressure range of 0 to 500 Pa and analogue control mode.

Catalog excerpts

Let‘s realize the potential of air for a sustainable world Technical brochure Pressure controller DRF The DRF pressure controller offers an efficient, precise and cost-effective solution for line pressure control in ventilation and air-conditioning systems. It is ideal wherever a constant pressure is required in air pipes without the need for measurement of the air flow rate. Differential pressure control up to 1000 Pa Leakage air rate according to DIN EN 1751, Class 4 (DN 100/125: Class 3) Housing tightness Class C according to DIN EN 1751 No flow path required Low pressure losses: energy savings, quiet operation Precise line pressure control for stable operating conditions Measuring range: 0...500 Pa depending on version Conversion or programming to DRFactive or VRFactive is possible Compact design, retrofittable insulation shell W W W . L T G - A G . COM

Open the catalog to page 1

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular Application, construction, operating principle, features, materials/finishes, options, accessories 3 Function, installation and positioning 4 Ventilation systems with pressure controllers (examples) 7 Nomenclature, ordering codes 8 Technical data, controller components 9 © 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.

Open the catalog to page 2

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular The DRF pressure controller is used for line pressure control in air ducts within ventilation and air-conditioning systems. It ensures that a constant and comparable inlet pressure is maintained at downstream components such as flow rate controllers, induction units or air diffusers. This automatically balances the air circuits and achieves optimised pressure distribution throughout the entire system. The measured pressure value can be used, taking the damper position into account, to control the fan speed (dead-point...

Open the catalog to page 3

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular Required straight flow path The static pressure in the air duct is detected via a pressure tap at the desired measuring point and measured by the differential pressure sensor. The controller compares the actual pressure with the setpoint and controls the damper blade so that the setpoint is maintained as accurately as possible. This control principle ensures stable pressure distribution throughout the duct network and contributes to efficient fan control. The DRF pressure controller itself does not impose any...

Open the catalog to page 4

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular Type DRF.../-/G327-... without insulation shell Type DRF.../D/G327-... with insulation shell Permitted installation position: damper axis in a horizontal position © 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.

Open the catalog to page 5

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, 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.

Open the catalog to page 6

LTG Comfort Air Technology DRE| Technical brochure Pressure controller DRF, rectangular Ventilation systems with pressure controllers (examples) The pressure setpoint must be designed in accordance with the downstream loads. A calculation of the ductwork network is essential. Ventilation systems with pressure controllers in the supply air and extract air circuits Line pressure controller 24 V A: for open-plan offices Extract air diffuser B: for individual rooms Transfer air diffuser LDO Line pressure controller 24 V Line pressure controller 24 V DRF A: for open-plan offices Extract air diffuser...

Open the catalog to page 7

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular Please specify when ordering: - Control: analogue or Modbus If this information is not provided, the unit will be supplied with the following factory setting: - Analogue control Order example DRF 600x200/S/D/G710, Pmin = 150 Pa, Pmax = 300 Pa, 2...10 V mode, analogue 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 changes.

Open the catalog to page 8

Open the catalog to page 9

Open the catalog to page 10

LTG Comfort Air Technology | Technical brochure Pressure controller DRF, rectangular Nominal width B [mm] Nominal height H [mm] Airborne sound transmission without silencer - Total pressure difference - Octave midband frequency - Sound power level - Sound power level, A-weighted - Sound pressure level, A-weighted Conversion to other sizes is carried out at the same throttling point using flow velocity and pressure loss, with the ΔL values from the following table. The values refer to the respective nominal height H. LW Okt = LW table + ΔL © LTG Aktiengesellschaft, Grenzstrasse 7, 70435 Stuttgart...

Open the catalog to page 11

Open the catalog to page 12

DRF

DRF

Catalog excerpts

All LTG Incorporated catalogs and technical brochures