Super Refrigeration India Private Limited

The demand of liquid ammonia pumps are increasing day by day in different segments of refrigeration industries and this is because of its unique advantages and benefits with the overfeed system. Typical application includes cold storages, dairies, IQF, blast freezers, ice cream plants, refineries and chemical refrigeration. Liquid ammonia pump is the heart of the overfeed system which pumps the liquid ammonia throughout the refrigeration system and it is important that it should run without any leakage and trouble free operation for years.

Overfeed systems (re-circulation system) are those in which excess liquid is forced, mechanically or by gas pressure, through organized-flow evaporators, separated from the vapour, and returned to the evaporators. This ensures no oil in the evaporators and no liquid slugs in the compressor leading to high saving in power and maintenance. 

Advantages of liquid overfeed system :

1. Increase in plant efficiency
2. Protection of compressors
3. Hot gas defrosting
4. No effects of fluctuating ambient and condensing conditions
5. Zero pressure drops in the evaporators / overfeed lines
6. Ease of operation
7. Low maintenance
8. Lower discharge pressure
9. Elimination of control valves
10. No need of accumulators with evaporators
11. Increase in compressor life
12. Proper distribution of refrigerant