Series: SKA (2BV) / 2SK / SK
Max. Suction Capacity: 27–500 / 1.5–30 / 1.5–120 m³/min
Ultimate Vacuum: -0.098 to -0.091 MPa
Power: 0.81–15 / 4–45 / 3–185 kW
Speed: 970–2880 / 740–1440 / 590–1450 r/min
ULPMAT offers a range of water ring vacuum pumps for continuous-duty vacuum and process applications, including single-stage, two-stage and vacuum pump/compressor configurations.
Our vacuum pump range includes the SKA (2BV) single-stage series, 2SK two-stage series, and SK vacuum pump & compressor series, covering different pumping capacities and vacuum requirements. These pumps are designed for applications including vacuum evaporation, vacuum concentration, vacuum drying, vacuum impregnation, vacuum filtering and general process vacuum.
| Series | Type | Key Characteristics | Capacity Range |
| SKA (2BV) | Single-stage water ring vacuum pump | Compact direct-coupled design, low noise, continuous-duty operation | 27–500 m³/h |
| 2SK | Two-stage water ring vacuum pump | Higher ultimate vacuum and high pumping speed in the deep-vacuum zone | 1.5–30 m³/min |
| SK | Water ring vacuum pump & compressor | Dual vacuum/compression function, suitable for flammable and explosive gases | 1.5–120 m³/min |
The SKA (2BV) series is a single-stage, direct-coupled water ring vacuum pump engineered for continuous-duty vacuum service. Its coaxial pump-and-motor configuration provides a compact installation footprint, while the standard mechanical seal supports reliable sealing and simplified maintenance.
A flexible exhaust port helps prevent over-compression and allows the pump to operate efficiently across its performance range.
The SKA (2BV) series is suitable for vacuum evaporation, vacuum concentration, vacuum drying, vacuum impregnation and other process vacuum applications.
| Model | Max. Air Volume (m³/h) | Ultimate Vacuum (MPa) | Power (kW) | Speed (r/min) | Noise dB(A) | Weight (kg) |
| SKA(2BV)-2060 | 27 | -0.098 | 0.81 | 2880 | 62 | 30 |
| SKA(2BV)-2061 | 52 | -0.098 | 1.45 | 2880 | 65 | 32 |
| SKA(2BV)-2070 | 80 | -0.098 | 2.35 | 2880 | 66 | 48 |
| SKA(2BV)-2071 | 110 | -0.098 | 3.85 | 2880 | 72 | 56 |
| SKA(2BV)-5110 | 165 | -0.098 | 4.0 | 1450 | 63 | 88 |
| SKA(2BV)-5111 | 230 | -0.098 | 5.5 | 1450 | 68 | 100 |
| SKA(2BV)-5121 | 280 | -0.098 | 7.5 | 1450 | 69 | 120 |
| SKA(2BV)-5131 | 400 | -0.098 | 11 | 1450 | 73 | 164 |
| SKA(2BV)-5161 | 500 | -0.098 | 15 | 970 | 74 | 276 |
The SKA (2BV) series can be used for:
Typical industries include food, chemical, pharmaceutical and electronics.
The 2SK series is a two-stage water ring vacuum pump designed to provide a higher ultimate vacuum than single-stage configurations, together with high pumping speed in the deep-vacuum zone.
For applications requiring deeper vacuum, the 2SK-P1 atmospheric jet pump units combine the two-stage pump with an atmospheric jet pump and can achieve an ultimate vacuum of -0.099 MPa (approximately -750 mmHg).
The pump uses water as the working fluid, providing a practical solution with low maintenance requirements. Its construction also allows the pump to handle vapour, moisture, small quantities of dust and small liquid carry-over.
| Model | Suction Volume (m³/min) | Ultimate Vacuum (MPa) | Power (kW) | Speed (r/min) | Water (L/min) | In/Out (mm) | Weight (kg) |
| 2SK-1.5 | 1.5 | -0.098 | 4 | 1440 | 10–15 | 40 / 40 | 230 |
| 2SK-3 | 3 | -0.098 | 7.5 | 1440 | 15–20 | 40 / 40 | 320 |
| 2SK-6 | 6 | -0.098 | 15 | 1460 | 25–35 | 50 / 50 | 500 |
| 2SK-12 | 12 | -0.098 | 22 | 970 | 40–50 | 100 / 100 | 800 |
| 2SK-20 | 20 | -0.098 | 37 | 740 | 60–80 | 125 / 125 | 1750 |
The 2SK series can be used for:
Typical industries include food, textile, chemical, pharmaceutical, metallurgy and electronics.
The SK series is a direct-coupled water ring machine designed to operate as both a vacuum pump and a compressor.
Its compression process operates under near-isothermal conditions, making the series particularly suitable for applications involving flammable or explosive gases.
The complete system consists of the pump, coupling, motor, gas-water separator and piping. An automatic overflow switch is used to control the working-water level.
| Model | Max. Air Volume (m³/min) | Ultimate Vacuum (MPa) | Compressor Pressure (MPa) | Power (kW) | Speed (r/min) | In/Out (mm) |
| SK-1.5 | 1.5 | -0.091 | 0–1 | 3 | 1450 | 70 / 70 |
| SK-3 | 3 | -0.093 | 0–1 | 5.5 | 1450 | 70 / 70 |
| SK-6 | 6 | -0.093 | 0–1 | 11 | 970 | 80 / 80 |
| SK-9 | 9 | -0.093 | 0–1 | 15 | 970 | 80 / 80 |
| SK-12 | 12 | -0.093 | 0–1 | 18.5 | 970 | 80 / 80 |
| SK-15 | 15 | -0.093 | 0–1 | 30 | 970 | 80 / 80 |
| SK-20 | 20 | -0.093 | 0–1 | 37 | 740 | 150 / 150 |
| SK-30 | 30 | -0.093 | 0–1 | 55 | 740 | 150 / 150 |
| SK-42 | 42 | -0.093 | – | 75 | 740 | 150 / 150 |
| SK-60 | 60 | -0.093 | – | 95 | 590 | 250 / 250 |
| SK-85 | 85 | -0.093 | – | 132 | 590 | 250 / 250 |
| SK-120 | 120 | -0.093 | – | 185 | 590 | 300 / 300 |
The SK series is widely used in:
It can be used for both vacuum and compression service.
Water ring vacuum pumps use water as the working medium to create a vacuum or provide gas compression.
During operation, the rotating impeller forms a liquid ring inside the pump chamber. The changing volume between the impeller blades and liquid ring creates the pumping action.
This operating principle allows water ring vacuum pumps to handle certain amounts of vapour, moisture and liquid carry-over, making them suitable for wet-process vacuum applications.
For the SK series, the same water-ring principle can be used for both vacuum pumping and compression service.
Choosing the appropriate vacuum pump depends primarily on the required vacuum level, pumping capacity and process conditions.
For general vacuum applications
Choose the SKA (2BV) single-stage series when you need a compact direct-coupled water ring vacuum pump with capacities from 27 to 500 m³/h.
For deeper vacuum requirements
Choose the 2SK two-stage series when higher ultimate vacuum and high pumping speed in the deep-vacuum zone are required.
For even deeper vacuum, the 2SK-P1 atmospheric jet pump configuration is available.
For vacuum + compression applications
Choose the SK series when the system requires both vacuum pumping and gas compression.
For larger pumping capacity
The SK series provides a broad capacity range up to 120 m³/min, while the 2SK series covers up to 30 m³/min.
| Requirement | Recommended Series |
| Compact direct-coupled design | SKA (2BV) |
| General industrial vacuum | SKA (2BV) |
| Vacuum evaporation | SKA (2BV) / 2SK |
| Vacuum concentration | SKA (2BV) / 2SK |
| Vacuum drying | SKA (2BV) / 2SK |
| Deep-vacuum operation | 2SK |
| Vacuum + compression | SK |
| Flammable or explosive gas applications | SK |
| Large pumping capacity | SK |
The vacuum pump can be integrated into a complete vacuum process system according to application requirements.
Potential system components include:
A water ring vacuum pump is a mechanical vacuum pump that uses water as the working fluid to generate vacuum through a rotating impeller and liquid-ring formation.
The SKA (2BV) is a single-stage water ring vacuum pump, while the 2SK is a two-stage design intended for higher ultimate vacuum and high pumping speed in the deep-vacuum zone.
Both the SKA (2BV) and 2SK series can be used for vacuum evaporation. The appropriate model depends on the required pumping capacity and vacuum level.
The 2SK two-stage series is designed for higher ultimate vacuum than the single-stage SKA (2BV) series. The 2SK-P1 atmospheric jet pump configuration can reach up to -0.099 MPa.
The 2SK series is specified as capable of handling vapour, moisture, small dust and small liquid carry-over.
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