Data sheet

Precision pressure regulator (volume booster) G 1/2"
Item number:
FDRI 03
Example illustration
Item description
Application:
Remote-controlled precision pressure regulators are used when high flow values are required at a constant pressure. The pressure regulator can also be used at inaccessible places (for example, in danger zones or the roof areas). Setting is done by means of a pilot pressure regulator that can be placed anywhere at will. The regulated pressure corresponds to the pressure applied at the remote control borehole and is maintained with high precision.
Version:
Precision pressure reducer, reversible (with secondary relieving) Collective relieving through G 3/8" borehole)
Materials:
Body: die-cast zinc Z410, diaphragms and seals: NBR
Temperature range:
-35 to +60 °C
Input pressure:
max. 16 bar
Pressure gauge connection:
G 1/4"
Own air consumption:
1.7 l/min at 6 bar outlet pressure
Control accuracy:
± 2.5 mbar
Control connection:
G 1/8"
Media:
fine-filtered compressed air (5 µm) & neutral gases, oil-free
Flow:
6500 l/min, secondary relieving: 800 l/min
ATEX:
Operating material without its own potential source of ignition in accordance with Directive 2014/34/EU
Advantages:
•Automatic venting in case of overpressure on the secondary side from large vent hole (G 3/8") with up to 800 l/min,
•High flow rate at constant pressure,
•Remote pressure control by a pilot regulator (when using a precision pressure regulator with feedback connection as pilot, a very precise pressure setting is possible),
•Fine control of the pressure independent of inlet pressure and flow rate,
•Can be used up to -35 °C
Recommendation:
For best regulation results, please use the precision pressure regulator with feedback connection Type DRF 31-7 FB / DRF 31-16 FB
Warning:
This device is supplied without a pressure gauge. We recommend ordering a suitable pressure gauge separately.
Properties
De­sign Pre­ci­sion pres­sure reg­u­la­tor
Thread G 1/2"
Pres­sure reg­u­la­tion range [bar] 0,05 - 10
H [mm] 107
H1 [mm] 65,5
Mount­ing brack­ets BW 30
Further information:
Weight 1,2 kg / pcs
GTIN 4050571295189
Customs duty number 84811099
RoHS compliant Yes
Drawing:
Drawing: FDRi 03 (0.05 - 10 bar): Flow rate
Drawing: FDRi 03 (0.05 - 10 bar): Venting
Landefeld Druckluft und Hydraulik GmbH · Konrad-Zuse-Straße 1 · 34123 Kassel · Germany
All data are to be understood as non-binding reference values! We do not assume liability for any data selection not confirmed in writing. Unless otherwise specified, pressure values refer to liquids from Group II at +20°C.
As of: 20.07.2025