1 – 100 TRCapacity
−35 °C to −70 °CTemperature
Low Temperature & Ammonia
Overview
For processes colder than a single refrigerant can reach efficiently, Teqtive builds cascade brine chillers. Two refrigerant circuits work in series: a high-stage circuit condenses the low-stage refrigerant, which then evaporates at ultra-low temperature.
Cascade systems cover −35 °C to −70 °C and 1 TR to 100 TR, with screw or reciprocating compressors and CS or SS evaporators to suit the brine.
Technical specifications
| Brine | Glycol, methanol, CaCl₂ etc. |
|---|---|
| Capacity Range | 1 TR to 100 TR |
| Temperature Range | (−) 35 °C to (−) 70 °C |
| Compressor Type | Semi-hermetic screw / reciprocating, open screw / reciprocating |
| Evaporator Type | Shell & tube type with CS/SS shell & copper/SS tubes, BPHE |
| Condenser Type | Shell & finned tube type |
| Operation | Economized |
| Refrigeration Controls | Suction/discharge/oil pressure switch/transmitter, suction/discharge/oil/chilled water/cooling water temperature sensors/transmitters, chilled water/CT water flow switch |
| Refrigerant | R-23, R404a, R717, R-407c, R-134a |
| Electrical Safety | Motor overload protection, SPP/RP/OV/UV protection |
| Mechanical Safety | LP/HP/pressure/Oil/Anti-freeze/Chilled water/CT water flow switch |
| Design Ambient Temp. | 0 °C to 50 °C |
| Controller Type | PLC / Microprocessor / PID |
| Starter | DOL / VFD / Soft starter (Optional) |
Typical applications
- Ultra-low-temperature pharmaceutical synthesis
- Freeze drying and lyophilisation support
- Gas liquefaction and purification
- Material testing and environmental chambers
- Specialty chemical processes
