For CO2 freezing and NH3 heat pump applications
The GEA Grasso 5HP is a high-pressure reciprocating compressor designed for industrial freezing, cooling, and heating applications using the natural refrigerants CO2 and ammonia. The 50 bar series includes four single-stage models with three to six cylinders, offering flexible capacity for a wide range of industrial refrigeration systems.
Its low volume flow in relation to cooling capacity supports efficient performance in CO2 cascade freezing applications. The compressor is also suitable for ammonia heat pump systems, enabling condensing temperatures of up to 85 °C for high-temperature water production, process heating, and industrial heat recovery.
Key features and highlights
- Compact nodular cast iron housing
- 50 bar design pressure, with up to 30 bar pressure difference
- Gas-tight shaft seal and heavy-duty bearings
- Per-cylinder capacity control and speed range of 500–1,500 rpm
- High-efficiency valve technology
- Available as a packaged unit
Technical data
| Models | Swept volume¹ (m³/h) | No of cylinders | Speed range (rpm/min) | Type of drive² | Cooling capacity³ (kW) / -50/0 °C (kW) | Cooling capacity³ (kW) / -40/-10 °C (kW) |
|---|---|---|---|---|---|---|
| CO₂ freezing applications / 50 bar | ||||||
| GEA Grasso 35HP | 101 | 3 | 500–1500 | Direct | 85 | 161 |
| GEA Grasso 45HP | 135 | 4 | 500–1500 | Direct | 113 | 215 |
| GEA Grasso 55HP | 168 | 5 | 500–1500 | Direct | 141 | 268 |
| GEA Grasso 65HP | 202 | 6 | 500–1,500 | Direct | 169 | 320 |
| Models | Swept volume¹ (m³/h) | No of cylinders | Speed range (rpm/min) | Type of drive² | Heating capacity³ (kW) / +35/+80 °C (kW) | Heating capacity³ (kW) / +30/+70 °C (kW) |
|---|---|---|---|---|---|---|
| NH₃ heat pump applications / 50 bar | ||||||
| GEA Grasso 35HP | 101 | 3 | 500–1500 | Direct | 265 | 242 |
| GEA Grasso 45HP | 135 | 4 | 500–1500 | Direct | 353 | 321 |
| GEA Grasso 55HP | 168 | 5 | 500–1500 | Direct | 441 | 402 |
| GEA Grasso 65HP | 202 | 6 | 500–1500 | Direct | 529 | 481 |
¹ theoretical swept volume based on max. speed mentioned in the table, ² variable speed drive only, ³ capacity based on package with 2K non-useful superheat & 0K subcooling (two-stage on open flash C interstage cooler)
