Oil Rotary Vane Pump

Q: What is the function of the gas ballast and when should it be used?

The gas ballast prevents the condensation of vapors within the pump oil during compression. It is essential when pumping condensable gases to maintain oil purity and prevent corrosion, though it slightly increases ultimate base pressure.

Q: How often should the vacuum oil be changed in a rotary vane pump?

In clean applications, oil can last up to 3,000 hours. In aggressive cycles, we recommend monthly inspection. Fluid should be changed whenever color becomes dark or cloudy to maintain ultimate pressure performance.

Q: Are AIMRSE oil-sealed pumps compatible with Oxygen-rich process environments?

Standard mineral oils are hazardous for oxygen concentrations above 21%. We offer specialized versions utilizing inert PFPE fluids and compatible sealing materials for safe oxygen-rich operation.

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Cat	Products Name	Key Features
VGE-ORVP-111	Oil Rotary Vane Pump 0.9m3/h Dia15mm 0.12kW 16kg	0.9m³/h; 0.12kW; 16kg
VGE-ORVP-112	Oil Rotary Vane Pump 1.8m3/h Dia20(KF-16)mm 0.18kW 17kg	1.8m³/h; 0.18kW; 17kg
VGE-ORVP-113	Oil Rotary Vane Pump 3.6m3/h Dia20(KF-16)mm 0.25kW 18kg	3.6m³/h; 0.25kW; 18kg
VGE-ORVP-114	Oil Rotary Vane Pump 7.2m3/h Dia30(KF-25)mm 0.37kW 22kg	7.2m³/h; 0.37kW; 22kg
VGE-ORVP-115	Oil Rotary Vane Pump 14.4m3/h Dia30(KF-25)mm 0.55kW 24kg	14.4m³/h; 0.55kW; 24kg

Industrial Oil-Sealed Rotary Vane Pumps

The AIMRSE dual-stage oil-sealed rotary vane pump series serves as the foundational workhorse for achieving high-performance fore-vacuum and primary evacuation. Engineered for continuous industrial duty, these pumps utilize a specialized forced-lubrication architecture and precision-machined sliding vanes to manage gas loads from atmospheric pressure down to the fine vacuum regime ($< 5 \times 10^{-1}$ Pa). By integrating high-viscosity vacuum fluids as both a sealant and a coolant, our systems ensure absolute volumetric efficiency and thermal stability during prolonged pumping cycles.

Designed to sustain the rigorous demands of HVAC evacuation, vacuum distillation, and backing for high-vacuum manifolds, AIMRSE rotary vane pumps prioritize mechanical durability. Each unit features a robust anti-suckback mechanism and an adjustable gas ballast, facilitating the effective handling of water vapor and other condensable contaminants without compromising the ultimate base pressure or oil integrity.

Consult Our Primary Vacuum Team

Discuss your volumetric displacement requirements and chemical compatibility needs with our senior fluid engineers.

Global engineering support available within 24 hours.

Mechanical Architecture & Vapor Management

Centrifugal Forced Lubrication

To maintain a consistent sealing film between the vanes and the stator, our pumps employ a dedicated oil pump integrated into the rotor shaft. This forced-feed system ensures that all friction-intensive interfaces receive continuous, pressurized lubrication even during high-pressure start-up phases, significantly reducing mechanical wear and preventing thermal runaway in heavy-duty cycles.

Dual-Stage Compression Efficiency

The dual-stage architecture consists of a high-vacuum stage followed by a second, atmospheric-discharge stage in series. This configuration optimizes the compression ratio, allowing the pump to achieve ultimate pressures significantly lower than single-stage variants. The internal inter-stage venting minimizes the required torque, enhancing energy efficiency during the deep-vacuum phase of operation.

Multi-Stage Gas Ballast Logic

Handling condensable vapors requires precise partial pressure control. Our adjustable gas ballast introduces atmospheric air or dry nitrogen into the compression chamber, ensuring that vapors do not reach their dew point. This prevents oil emulsification and corrosive build-up within the pump, maintaining lubricating properties even when processing high humidity or organic solvent loads.

The Advantages of AIMRSE

Precision-engineered durability for rigorous industrial primary vacuum applications.

Proven Base Pressure

Achieves verified ultimate pressures down to 4x10⁻¹ Pa (without gas ballast), ideal for sensitive backing and laboratory tasks.

System Safety Handshake

Integrated anti-suckback valves automatically isolate the vacuum chamber during power failures, preventing oil migration.

Thermal Management

Large-surface cooling fins and optimized airflow ducting maintain low operational temperatures, extending oil service life.

Modular Maintenance

External oil-sight glass and easily accessible drainage ports allow for rapid fluid monitoring and maintenance with zero downtime.

Standards & Metrology Compliance

The operational performance of AIMRSE oil-sealed rotary vane pumps is strictly governed by global industrial machinery and vacuum technology standards. Performance benchmarks, including effective pumping speed and ultimate base pressure, are verified in full accordance with ISO 21360-1. All electrical components and motor assemblies comply with EN 60034-1 and UL 1004-1 safety protocols. Furthermore, our manufacturing processes are audited under the ISO 9001:2015 quality management system, ensuring that material integrity and dynamic balancing meet the high-reliability documentation requirements of the semiconductor and automotive industries.

Technical FAQ

What is the function of the gas ballast and when should it be used?

The gas ballast prevents the condensation of vapors (such as water or solvents) within the pump oil during the compression stroke. It should be used whenever the process involves pumping condensable gases. While using the gas ballast slightly increases the ultimate base pressure, it is essential for maintaining oil purity and preventing internal corrosion.

How often should the vacuum oil be changed in a rotary vane pump?

The frequency of oil changes depends on the process load and cleanliness. In clean laboratory applications, oil can last up to 3,000 operational hours. However, in aggressive industrial cycles with high particulate or chemical loads, we recommend inspecting oil color and viscosity monthly. Changing the oil when it becomes dark or cloudy is critical for maintaining ultimate pressure performance.

Are AIMRSE oil-sealed pumps compatible with Oxygen-rich process environments?

Standard mineral-based vacuum oils can be hazardous in oxygen-rich environments. For processes with oxygen concentrations above 21%, we offer customized pump versions utilizing inert Perfluoropolyether (PFPE) fluids and specialized sealing materials to ensure safe operation and chemical resistance.

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Note: Our vacuum equipment is for research and industrial testing only. Industrial-grade components are fully rated for field deployment.

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