Two-stage Oil-lubricated Rotary Vane Vacuum Pump
Leynow · Two-stage Rotary Vane Technology
Ordinary single-stage rotary vane pumps have attenuated pumping speed at low pressures and cannot meet production and experimental processes requiring deeper vacuum, such as coating and freeze-drying.
When extracting gases with water vapor, the pump oil easily emulsifies and fails, requiring frequent replacement of vacuum pump oil and increasing usage costs.
Pump oil flows back into the vacuum chamber during shutdown, contaminating workpieces and experimental samples, causing product scrapping.
High-temperature alarm and shutdown during long-term operation; difficult procurement of special parts for high vacuum pumps, lack of professional repair technical support.
Two-stage pump chamber series compression, ultimate vacuum up to 0.005mbar, excellent pumping speed performance in the low-pressure range, meeting the production and experimental requirements of high vacuum processes.
Standard gas ballast valve handles water vapor, inhibits water vapor from condensing and emulsifying in the pump oil, effectively extending the service life of the vacuum pump oil and reducing the frequency of oil changes.
Equipped with a check anti-oil backflow structure, blocking pump oil backflow during shutdown, avoiding oil vapor contamination of vacuum chambers, workpieces, and experimental samples.
IP54 protected, Class F insulated motor, optimized heat dissipation, complete machine full-load durability testing, suitable for long-term uninterrupted operation in laboratories and production lines.
Optional oil mist separator reduces exhaust oil mist, reduces oil stains in workshops and laboratories, and optimizes on-site working conditions.
Multiple specifications in the full LD series; complete original factory accessories including vacuum pump oil, vanes, and filters; support for selection, troubleshooting, and factory repair and maintenance.
| Product Model | Motor Power | Ultimate Vacuum | Rated Voltage | Rated Flow | Rated Current | Industry Application |
|---|---|---|---|---|---|---|
LD 0016 |
0.55 Kw | 0.005 mbar | 220-240/380-415 V | 2.40/1.45 A | 14.4 m³/h | 真空包装 |
LD 0030 |
1.50 Kw | 0.005 mbar | 220-240/380-415 V | 6.5/3.50 A | 30 m3/h | 真空包装 |
The LD two-stage oil-lubricated rotary vane vacuum pump is a positive displacement oil-sealed mechanical vacuum pump, with two sets of rotor-vane pump chambers arranged in series inside. The rotor in the cylinder is equipped with three vanes, which are pressed against the inner wall of the pump chamber by centrifugal force, dividing it into independent variable-volume chambers.
The gas first enters the first-stage pump chamber to complete primary compression, then is sent to the second-stage pump chamber for secondary compression, and is discharged from the exhaust port after compression is completed. The complete machine uses vacuum pump oil circulation for lubrication and sealing; an oil mist separator is configured to achieve oil-gas separation and oil recycling; a shutdown check valve blocks medium backflow and protects the vacuum-side chamber.
The two-stage compression structure brings a deeper ultimate vacuum, and the standard gas ballast valve can handle a small amount of water vapor. It is widely used for standalone vacuum pumping and can also be used as a backing pre-pumping pump for Roots pumps and molecular pumps.
The Leynow LD series two-stage oil-lubricated rotary vane vacuum pump is suitable for industrial production, scientific research experiments, and vacuum unit matching scenarios with high vacuum requirements. Standalone or backing pump solutions can be provided according to process requirements.
The two-stage oil-lubricated rotary vane vacuum pump is an oil-sealed mechanical vacuum pump with two-stage pump chamber series compression. The working pressure range is typically 101325~5×10⁻³ Pa, making it a medium-high vacuum generation equipment.
The pump has a high ultimate vacuum, is equipped with gas ballast to resist water vapor, prevents oil backflow, and operates stably. It is suitable for various processes with strict vacuum degree requirements.
Compiled technical reference materials related to vacuum pumps for selection, equipment commissioning, and troubleshooting.
Used for processes such as optical coating, semiconductor coating, and decorative coating, providing a stable medium-high vacuum environment for chambers.
Suitable for processes such as vacuum rectification, freeze-drying, vacuum impregnation, and sample treatment, helping to improve separation and drying efficiency.
Used for vacuum pumping, leak detection, and refrigerant filling pre-treatment of air conditioning and refrigeration systems, ensuring system cleanliness and vacuum status.
Providing stable vacuum sources for experimental equipment and analytical instruments in universities and research institutes, supporting the vacuum environment of experimental chambers and testing equipment.
Used for small vacuum furnaces, heat treatment furnaces, and vacuum sintering equipment, meeting the vacuum environment requirements during metal processing.
Providing a clean and stable vacuum environment for processes such as semiconductor manufacturing, electronic packaging, and device aging testing.
As the main pump or backing pump for coating equipment, providing stable vacuum conditions for optical thin film, decorative film, and semiconductor thin film processes.
Used in the freeze-drying process of pharmaceuticals, food, and biological samples, helping to achieve low-temperature dehydration and preserve sample activity.
Lowering the boiling point in chemical separation processes to achieve rectification and separation of heat-sensitive materials, improving process safety and stability.
Used for impregnation treatment of motor coils, castings, powder metallurgy, etc., helping the medium to fully enter the pores, improving insulation and density.
Used for vacuum pumping, leak detection, and exhaust treatment in the installation and maintenance of air conditioning units, refrigeration equipment, and refrigerant systems.
As the ideal backing pump for Roots vacuum pumps and molecular pumps, forming a complete vacuum unit to obtain greater pumping speed and higher vacuum.
Usage Limitations: Not suitable for extracting gases with large amounts of dust, strong corrosiveness, high-concentration oxygen, or gases that chemically react with pump oil; cannot be used as a transfer pump or compression pump. Please open the gas ballast valve for working conditions with water vapor.
Selection Recommendations: For ordinary rough vacuum working conditions, prioritize single-stage oil-lubricated rotary vane vacuum pumps; for coating, freeze-drying, rectification, and laboratory instrument scenarios requiring high ultimate vacuum, choose LD series two-stage oil-lubricated rotary vane vacuum pumps.
The two-stage adopts two pump chambers in series, which can obtain a deeper ultimate vacuum and better low-pressure pumping speed, is equipped with a gas ballast to resist water vapor and prevent oil backflow; suitable for processes with high vacuum requirements such as coating and freeze-drying; for ordinary rough vacuum working conditions, a single-stage is sufficient and more cost-effective.
Highly suitable. The LD series two-stage oil-lubricated rotary vane pump is a commonly used backing pump for Roots units and molecular pump systems, ensuring the vacuum performance of the entire unit.
Open the gas ballast valve when extracting gases containing water vapor or condensable gases to prevent water vapor from condensing and emulsifying the pump oil; it is recommended to close the gas ballast valve when extracting dry and clean gases to obtain the best ultimate vacuum.
Check whether the built-in check anti-oil backflow valve of the equipment is normal; an external anti-oil backflow device can also be optionally configured; Leynow original factory parts can replace the check valve assembly.
Yes, complete original factory LD series accessories, including vacuum pump special oil, vanes, and filters; providing technical consultation, troubleshooting, and factory repair and maintenance services.
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