FEMA CP8000 Cold Protection System
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Cold protection system
Media
Cryogenic media
Manufacturers
FEMA
Technical specifications
Size ranges: DN 25 (1”) – DN 250 (10”)
Pressure classes: max. PN 40
Maximum allowed pressure: 40 Barg
Temperature range: +5 °C…+20 °C, extreme temperatures -25/+50°C
Temperature sensors: PT1000/PT100
Power supply: 230 Vac or 24 Vac
Connections: flange connection
Others: ON-OFF system with control feature, PED 97/23/CE, approved for use in oxygen service, pneumatic valves
Other designations: cold protection system
What is a Cold Protection System?
The cold protection prevents the cold from penetrating to the warm side after the evaporator. It can also control the gas flow and/or temperature. For tanks over 5 tonnes, cold protection is mandatory. The system may include:
- One or more automatic on/off shut-off valves
- Possibly a control valve
- Two or more temperature sensors
- If necessary, also SIL/TET classification*
*In English, SIL (safety integrity level); in Finnish, TET (integrity level of safety) describes the likelihood of failure.
Selection of the Cold Protection System
The CP 8000-REG system monitors and controls the process gas temperature and flow. The system consists of a control panel, a shut-off and control valve, two solenoid valves, several temperature sensors, and a pressure control valve. A simpler model is also available, in which a second shut-off valve replaces the control valve.
The system is installed in conjunction with the cryogenic gasification (cold box). Its primary purpose is to ensure that the cold remains on the cold side. Additionally, it regulates temperature and flow. If the temperature in the line drops below the permitted setpoint, the system first issues an alarm. If the temperature continues to fall past a second setpoint, the system shuts down the line. The system has PED 97/23/EC approval.
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