Direct Drive Rotary Vane Vacuum Pumps

Direct Drive Rotary Vane Vacuum Pumps are oil-sealed positive displacement vacuum pumps engineered for rough and medium vacuum environments. By directly coupling the motor shaft to the rotor mechanism-eliminating dynamic belts and pulleys-this series reduces mechanical transmission losses and delivers a space-saving profile ideal for OEM integration.

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Flange Connected Direct Drive Vacuum Pump

Pump selection must be based on actual system operating requirements. Pumping speed, ultimate pressure, flange size, process gas, vapor load, operating duty, motor configuration, and installation

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Heavy Duty Direct Drive Rotary Vane Unit

The heavy duty direct drive rotary vane unit is an oil-sealed vacuum pump solution engineered for industrial equipment, OEM machinery, and process vacuum systems requiring stable, continuous vacuum

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Low Noise Direct Coupled Roughing Pump

By eliminating intermediate belt transmissions, the direct-coupled motor configuration delivers a compact footprint, reduced mechanical wear, and lower operating noise. These characteristics make it

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Compact Direct Drive Oil Sealed Vacuum Pump

The Compact Direct Drive Oil Sealed Vacuum Pump is a rotary vane vacuum pump designed for OEM equipment integrators, automated machinery, and general industrial applications where space efficiency,

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High Speed Direct Coupled Vane Vacuum Pump

The High Speed Direct Coupled Vane Vacuum Pump is an oil-sealed rotary vane vacuum pump designed with a direct motor-to-pump drive configuration. Engineered for heavy-duty, compact, and

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Direct Drive Dual Stage Rotary Vane Vacuum Pump

By combining a two-stage compression structure with a direct-coupled motor configuration, this pump delivers significantly lower base pressure than single-stage alternatives while eliminating belt

Key Features & Technical Advantages

Direct-Drive Architecture

Direct motor integration eliminates transmission belt wear, reduces mechanical breakdown risks, and saves critical mounting space inside OEM machinery.

Oil-Sealed Compression

Formulated vacuum oil provides dynamic internal sealing, continuous vane lubrication, and heat removal under demanding duty cycles.

Integrated Gas Ballast Valve

Protects pump oil from degradation by venting vapor-laden streams during compression, preventing condensation build-up in wet or solvent-heavy applications.

Configurable Vacuum Performance

Available in single-stage models for higher pumping speeds at rough vacuum, or two-stage models for deeper ultimate vacuum levels.

Technical Specifications

Parameter	Specification / Standard Range
Pump Type	Direct-Drive Oil-Sealed Rotary Vane Vacuum Pump
Compression Stages	Single-Stage / Two-Stage
Pumping Speed	2 m3/h - 90 m3/h (1.2 CFM - 53 CFM)
Ultimate Pressure	Single-Stage: <= 2 Pa \| Two-Stage: <= 4x10-2 Pa
Motor Power	0.18 kW - 3.0 kW
Electrical Supply	110V / 220V / 380V / 460V (±10%)
Frequency / Phase	50 Hz / 60 Hz; Single-Phase / Three-Phase
Connection Standard	ISO-KF (KF16 / KF25 / KF40)
Noise Level	<= 62 dBA
Certifications & Compliance	CE, ISO 9001:2015, RoHS

Manufacturing Quality & Testing Protocol

Precision Machining: Housing cavities, rotors, and end covers are machined on multi-axis CNC units and 100% CMM-checked to secure uniform dynamic clearances.

Dynamic Balance & Clearance: Vanes and rotors are hand-checked for free sliding movement and dynamically balanced to lower operating noise and vibration.

Oil Circuit Integrity: Hydraulic channels and shaft seals undergo static and dynamic leak testing to ensure leak-free operation.

Final Run-In Test: Finished pumps undergo continuous testing under full vacuum load to verify ultimate vacuum pressure, running temperature, electrical current draw, and startup behavior.

Pump Selection Guide

Target Vacuum

Define required working pressure and ultimate pressure.

Effective Pumping Speed

Calculate system volume, evacuation time target, and pipeline flow resistance.

Gas Profile

Identify condensable vapors, corrosive vapors, or particulates to determine gas ballast position and external filtration.

Duty Cycle

Specify continuous (24/7), cyclic, or intermittent operation for thermal balance management.

Electrical Compatibility

Confirm local voltage, frequency (50 Hz / 60 Hz), phase count, and motor enclosure protection.

Mechanical Interface

Verify inlet/exhaust port orientation, mounting bolt hole patterns, and maintenance clearance.

OEM Integration & Partner Support

2D and 3D CAD files (STEP, DWG) for fast installation planning
Standardized pumping speed curves and datasheets
Factory Acceptance Test (FAT) reports and quality certifications
Comprehensive spare parts kits (seal kits, vanes, maintenance gaskets)

FAQ

Q: How do I choose between a single-stage and a two-stage rotary vane pump?

A: Single-stage pumps are ideal for applications requiring high pumping speed at rough vacuum levels (above 100 Pa). Two-stage pumps add a secondary compression chamber to achieve deeper ultimate vacuum levels (down to 4x10-2 Pa), making them suitable for laboratory vacuum, analytical equipment, and deep vacuum drying.

Q: How does the gas ballast valve protect the vacuum pump oil?

A: The gas ballast valve introduces a controlled amount of dry air or inert gas into the pump compression chamber. This lowers the partial pressure of condensable vapors (such as water or solvent vapors), preventing them from condensing into liquid and mixing with the oil during compression.

Q: Can these pumps handle 60 Hz power grids for the North American market?

A: Yes. Motors can be configured for 50 Hz or 60 Hz operation, as well as single-phase (110V/220V) or three-phase (208-230V/460V) power supplies, meeting regional electrical standards worldwide.

Q: What maintenance is required to maintain ultimate vacuum pressure?

A: Regularly monitor oil level and oil color through the sight glass. Change vacuum pump oil when it appears dark or cloudy, or after recommended operating intervals. Inspect and clean inlet filter screens to protect internal clearances from foreign particles.

Q: What documentation is provided for OEM and custom project orders?

A: Each order can be supplied with dimensional CAD drawings, performance datasheets, operating manuals, factory test reports, spare parts catalogs, and CE/RoHS compliance documentation.

As one of the leading direct drive rotary vane vacuum pumps manufacturers and suppliers in China, we warmly welcome you to wholesale direct drive rotary vane vacuum pumps in stock here from our factory. All customized products are with high quality and competitive price. For quotation, contact us now.