I. Series Positioning
The Danfoss Maneurop® MT series is a product line of hermetic reciprocating compressors optimized for R22 refrigerant. This series is positioned for medium-to-high-temperature refrigeration applications, with an evaporation temperature range of -25°C to +15°C and cooling capacities from approximately 1.9 kW to over 20 kW. It is suitable for scenarios such as cold storage, food retail, milk cooling, process cooling, air dryers, and food service equipment. The MT series comes standard with mineral oil (160P) and is the most reliable and economical compressor choice for the existing R22 system aftermarket.
II. Full Series Parameter Comparison Table
| No. | Model | Displacement (cm³) | Nominal HP | Cooling Capacity (W) @ AC Conditions | Input Power (kW) | COP |
| 1 | MT18 JA | 30.23 | 1.5 | 3,881 | 1.45 | 2.68 |
| 2 | MT22 JC | 38.12 | 1.8 | 5,363 | 1.89 | 2.84 |
| 3 | MT28 JE | 48.06 | 2.3 | 7,378 | 2.55 | 2.89 |
| 4 | MT32 JF | 53.86 | 2.5 | 8,064 | 2.98 | 2.70 |
| 5 | MT36 JG | 60.47 | 3.0 | 9,600+ | — | — |
| 6 | MT40 JH | 67.89 | 3.5 | 10,475 | 3.30 | 2.72 |
| 7 | MT44 HJ | 76.22 | 4.0 | 11,037 | 3.89 | 2.84 |
| 8 | MT50 HK | 85.64 | 4.5 | 12,324 | 4.32 | 2.85 |
| 9 | MT56 HL | 96.13 | 5.0 | 13,771 | 5.04 | 2.73 |
| 10 | MT65 HM | — | 5.5 | — | — | — |
| 11 | MT73 HN | — | 6.0 | — | — | — |
| 12 | MT81 HP | — | 7.0 | — | — | — |
Note: The above data is compiled from Danfoss official technical documentation and publicly available industry data.
III. Full Series Detailed Analysis
Feature – Technical Characteristics
The MT series adopts a hermetic reciprocating structure, with the motor and pistons sealed within a single welded housing. All models are fully suction-gas cooled, meaning the motor is cooled by low-temperature suction gas, eliminating the need for an external cooling fan. The compressors are equipped with high-efficiency ring valves and high-torque motors, combined with internal motor protection devices, laying the foundation for high quality and long service life. Units are shipped pre-charged with mineral oil (160P) and dry nitrogen for protection, and feature Rotalock connections for easy installation and maintenance.
Advantage – Technical Advantages
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Native Optimization for R22 Systems. The MT series is a compressor line designed by Danfoss specifically for R22 refrigerant, perfectly matched with mineral oil lubrication systems. It can be used directly in R22 systems without the need to change the refrigeration oil. For the existing R22 system aftermarket—especially in regions where R22 phase-out is progressing slowly—the MT series provides the most economical and reliable native solution.
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Mature Structure, High Reliability. Built on Danfoss's over 40 years of compressor manufacturing experience, the MT series' piston-cylinder compression mechanism has been proven over the long term. Single-cylinder and twin-cylinder configurations feature simple structures with few moving parts, resulting in low failure rates and long overhaul intervals.
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Wide Operating Range. Evaporation temperature covers -25°C to +15°C, suitable for both medium-temperature refrigeration and high-temperature air conditioning dual-duty applications. All models are equipped with internal motor protection: single-phase units use temperature/current dual-sensing bimetal protectors, while three-phase units feature overcurrent/overheat protection at the star point, disconnecting all three phases simultaneously to ensure motor safety.
Benefit – User Benefits
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For the R22 Aftermarket (Maintenance & Replacement): The MT series means a plug-and-play replacement solution—no need to change refrigeration oil, modify system piping, or re-commission.
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For Cost-Sensitive Contractors and OEMs: The mature structure and proven quality of the MT series translate into lower failure rates and reduced after-sales repair expenses.
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For End Users: The MT series delivers R22 systems' inherently high energy efficiency (COP 2.68–2.89), controlling operating electricity costs while ensuring reliable cooling performance.
IV. Application Scenario Quick Selection Guide
| Application Scenario | Recommended Model | HP | Key Advantage |
| Small cold storage, milk tanks, beverage coolers | MT18 JA – MT22 JC | 1.5–1.8 | Lightweight, flexible installation |
| Ice machines, small refrigeration display cases | MT28 JE – MT32 JF | 2.3–2.5 | High COP 2.89 efficiency |
| Medium cold storage, food retail | MT36 JG – MT44 HJ | 3.0–4.0 | Twin-cylinder smoothness, liquid slug resistance |
| Medium cold storage, process cooling | MT50 HK – MT56 HL | 4.5–5.0 | Large displacement, ample cooling reserve |
| Large cold storage, industrial cooling | MT65 HM – MT81 HP | 5.5–7.0 | High power, supports multi-unit parallel |
Quick Selection Tips:
For R22 systems, choose the MT series — ranging from MT18 JA (1.5 HP) to MT81 HP (7 HP) in progressive steps. For low cooling demand, select 18–32; for medium demand, select 36–56; for high capacity, select 65–81.
If you have any questions regarding model selection or quotation, please feel free to contact us. Our technical team is always ready to provide you with professional support. We look forward to establishing a long-term and stable cooperative relationship with you. 
IV. Application Scenario Quick Selection Guide
If you have any questions regarding model selection or quotation, please feel free to contact us. Our technical team is always ready to provide you with professional support. We look forward to establishing a long-term and stable cooperative relationship with you. 
