LDMdrive

Low-power flow regulator with partly filled flow measurement

Flow measurement for partial filling in continuous operation

This robust flow measurement system for partly filled pipes, combined with a gate valve featuring a powerful low-power actuator, is characterised by its extremely low power consumption, enabling it to operate for several days on battery power alone, even without sunlight or mains supply. The slide gate valve is driven directly by the transmitter, saving on components and space.

Permanent connection to the control system ≤ 4G

The measurement and control data are transmitted directly to your process control system via the most common interfaces. The compact system impresses with its compact design and the coordinated components used. The system is available in a
compact version with guaranteed accuracy, which is ensured by calibration in STEBATEC’s hydraulics laboratory. The maintenance access panel allows for easy cleaning of the system. Factory commissioning, intuitive operation and commissioning instructions ensure efficient installation and commissioning.

Flexible in any operating situation

The LDMdrive is suitable for both off-grid operation and UPS operation with a mains connection. Off-grid operation is ensured by a battery and the simultaneous installation of a solar panel. This combination guarantees long operating times without interruption.
The corresponding operating times, depending on the size
of the LDMdrive, can be found in the tables.

Advantages of the LDMdrive

  • Can operate on mains power or off-grid – up to nominal diameter DN250 with 1m² of panel area; larger sizes up to DN500 with 2m² of panel area are
    fully off-grid
  • One week of off-grid operation; also suitable for mains and UPS operation, e.g. with a storage battery (LxWxH 33x69x22cm)
  • Thanks to LDM flow measurement, flow is measured even in dry weather and at the lowest fill levels
  • Full control via the control system thanks to a permanent connection via the 4G mobile network
  • Complete data logging integrated into the transmitter and accessible via a web interface
  • Alerts you in the event of contamination before measurement errors occur

Technical information

Running time per full battery charge

Nom. diameter DN150 DN150 DN200 DN200 DN250 DN250 DN300 DN300 DN350 DN350 DN400 DN400 DN500 DN500
Operating mode M/D¹ M/D/R² M/D¹ M/D/R² M/D¹ M/D/R² M/D¹ M/D/R² M/D¹ M/D/R² M/D¹ M/D/R² M/D¹ M/D/R²
Battery 120Ah 216h 90h 192h 80h 171.5h 72h 158h 65.5h 144.5h 60h 133.5h 55.5h 115.5h 48h
Battery 240Ah 432h 180h 384h 160h 343h 144h 316h 131h 289h 120h 267h 111h 231h 96h

Battery charging time with active flow measurement and data transmission

Nom. diameter DN150 DN150 DN200 DN200 DN250 DN250 DN300 DN300 DN350 DN350 DN400 DN400 DN500 DN500
Battery 120Ah 240Ah 120Ah 240Ah 120Ah 240Ah 120Ah 240Ah 120Ah 240Ah 120Ah 240Ah 120Ah 240Ah
Solar panel 1m² / 200Wp 24.3h 48.6h 24.6h 49.3h 25h 50h 25.3h 50.7h 25.8h 51.5h 26.1h 52.3h 27h 53.9h
2m² / 400Wp 11.5h 23h 11.6h 23.2h 11.7h 23.3h 11.8h 23.5h 11.9h 23.7h 11.9h 23.8h 12h 24.1h
3m² / 600Wp 7.5h 15.1h 7.6h 15.2h 7.6h 15.2h 7.7h 15.3h 7.7h 15.4h 7.7h 15.4h 7.8h 15.6h

¹ Calculation basis: While flow measurement and data transmission are active.
² Calculation basis: While flow measurement, data transmission and control (12/24h) are active.
The calculation for your LDMdrive will be carried out on a customer-specific basis following a site survey.
M = Measurement / D = Data transmission / R = Control mode / Battery dimensions LxHxW 120Ah 33x34x22cm / 240Ah 33x69x22cm

Technical specifications

Designation

LDM partly filled flow measurement

LDMdrive
Nominal pipe diameter

DN150 to DN1200

DN150 to DN500

Power supply

24V DC

Rated power Flow measurement, data transmission and actuator in the rest position

DN150 13W to DN500 25W

Rated power in control mode

DN150 64W to DN500 120W

Self-sufficiency

Via photovoltaics and 24V DC

Storage battery

Connection

Directly or via mobile network (≤ 4G)

to any process control system

Interfaces

Modbus TCP, optional I/O interface

(analogue and digital signals), via mobile network (≤ 4G)

Installation and maintenance

Easy installation with an intermediate flange; cleaning via an optional access opening

Let us advise you.

  • This field is for validation purposes and should be left unchanged.