Stopfill Cryo

Temperature-based Cryogenic Filling Unit

The Stopfill Cryo is a system developed by PLC & Process, specifically designed for the packaging of cryogenic liquids. It is intended for the automated filling of dewars (also called cryogenic receptacles, cryogenic cylinders, or cryostats). It is compatible with the requirements of the industrial, food, and medical sectors.

* Note: If you wish to perform dewar filling by weighing rather than by temperature, please consult the page for our Tankfill system.

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Capacities

Filling stations: The system can manage up to 4 filling stations simultaneously.
Container types: Dewars, cryogenic receptacles, cryogenic cylinders, or cryostats.

Operating Principle

Cold End Temperature: The filling process is based on the detection of cold temperature at the outlet.
Automated detection: The system accurately determines when the container is completely full based on temperature changes.

Cycle Sequence

Step 1: Simultaneous opening of the cryogenic liquid valve and the station's purge valve.
Step 2: The liquid flows to fill the dewar; excess gas/liquid is evacuated through the purge line.
Step 3: Once the probe detects cryogenic temperature, both valves are immediately closed.

Electrical & Hardware Characteristics

Power supply: 230/400 VAC.

Cabinet front: Main disconnect, emergency stop, reset push button (SIL board), and 10" touch screen with integrated RFID reader.

Safety: SIL-3/4 board.

Dimensions (H x W x D): 400 mm x 600 mm x 200 mm.

Mounting system: 4x wall mounting brackets.

Display Units: Configurable in Bar/PSI, °C/°F, and Liters/Gallons.

Remote assistance: Secure access for maintenance (if 4G VPN modem option is present on site).

Operating temperature: Standard 0°C to +50°C (other upon request).

I/O Boards Details

Input boards: for element feedback.

Analog input boards: for sensors.

RTD input boards: Dedicated RTD input boards for the acquisition of temperature probes used in detecting cryogenic liquid at the outlet (Cold End).

Output boards: for valve control (24VDC Max 8W).

P&ID Diagram

Piping and Instrumentation Diagram (P&ID) of the Stopfill Cryo system.