Vacuum Pump
Pumps & Valves
Vacuum Pump
1. Product Overview
A vacuum pump removes gas from a vessel by mechanical, physical or physicochemical means in order to create and maintain a vacuum. It consists of a pump casing, rotor/vanes/impeller, exhaust valve, cooling system and drive unit.
Typical duties: reduced-pressure distillation, vacuum filtration, vacuum drying, vacuum coating, food freeze-drying and pharmaceutical concentration.
Key features: high ultimate vacuum, a wide pumping-speed range, versatile constructions (dry or wet running) and suitability for corrosive gas service.
2. Working Principle
The volume of the working chamber changes cyclically: during the suction stroke the expanding volume creates a vacuum that draws gas in; during the compression stroke the shrinking volume compresses the gas until its pressure exceeds the exhaust pressure and it is discharged; the cooling system carries away the heat of compression. Different pump types create vacuum in different ways — a liquid-ring pump relies on a liquid seal, a rotary-vane pump on vanes dividing the chamber volume, and a Roots pump on two synchronously rotating lobes.
3. System Classification
By Working Principle
| Type | Features | Application Scenarios |
|---|---|---|
| Liquid ring vacuum pump | Uses liquid as working fluid, handles condensable gas | Chemical, pharma, paper, coal mining |
| Rotary vane vacuum pump | Vanes slide in rotor slots, volume changes | Labs, small packaging, vacuum smelting |
| Roots vacuum pump | Two lobe rotors rotate synchronously, no compression | Booster pump from rough to high vacuum |
| Dry screw vacuum pump | Twin screws mesh, dry operation | Chemical, semiconductor, pharma (oil-free) |
| Water jet vacuum pump | High-speed water jet entrainment | Vacuum concentration, evaporation |
4. Detailed Technical Parameters
4.1 Typical Specification Table
| Type | Pumping Speed (m³/h) | Ultimate Vacuum | Working Fluid/Cooling | Power | Applicable Media |
|---|---|---|---|---|---|
| Liquid ring (2BV/2SK) | 0.5～120 | -0.097MPa (~33mbar) | Water/Other liquids | 0.75～30kW | Moist, condensable gas |
| Rotary vane (2X) | 0.5～30 | 6×10⁻²Pa | Air/Water cooled | 0.37～5.5kW | Dry, dust-free gas |
| Roots (ZJ) | 30～3000 | ≤0.05Pa (with backing pump) | Air/Water cooled | 2.2～75kW | Dry, non-toxic gas |
| Dry screw | 10～1200 | ≤0.1Pa | Air/Water cooled | 5.5～90kW | Corrosive, dusty gas |
Note: Roots and screw pumps usually cannot exhaust to atmosphere directly; a backing pump is required.
4.2 Design Conditions & Performance Indicators
| Parameter | Specification |
|---|---|
| Vibration | ≤2.8mm/s (per GB standard) |
| Noise | Liquid ring ≤75dB(A); Vane ≤65dB(A); Roots ≤80dB(A) |
| Cooling water temp | ≤25℃ (higher temp affects ultimate vacuum) |
| Working fluid supply | Liquid ring requires continuous fluid supply |
| Protection class | IP55 standard |
4.3 Electrical Parameters
| Applicable Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/SE Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if needed) | 440V / 480V | 60Hz |
When ordering, please specify your local voltage and frequency.
5. Core Component Selection
| Component | Common Brands | Features & Applications |
|---|---|---|
| Motor | ABB, Siemens | IP55 as standard; VFD and explosion-proof versions available |
| Mechanical seal | John Crane, Burgmann | Silicon carbide / PTFE, corrosion resistant |
| Gas ballast valve | Premium Chinese brands | Standard on vane pumps, for pumping condensable vapour |
| Controller | PLC / microprocessor | Vacuum readout, automatic start/stop, cavitation protection |
6. Typical Application Fields
Chemical: vacuum distillation, filtration and evaporation. Pharmaceutical: concentration, reduced-pressure distillation and freeze-drying. Food: vacuum packaging, dewatering and freeze-drying. Electronics: vacuum coating and semiconductor manufacturing. Power: air extraction from condensers.
7. Design Standards & Certifications
| Standard | Description |
|---|---|
| GB/T 13929-2014 | Performance testing for positive displacement vacuum pumps |
| JB/T 7255-2019 | Liquid ring vacuum pumps and compressors |
| ISO 9001:2015 | Quality Management System |
| CE / EAC / GOST-R | Available upon request |
8. Customizable Options
| Option | Details |
|---|---|
| Wetted parts material | Cast iron / 304 / 316L / PTFE-lined |
| Working fluid | Water/Glycol/Transformer oil/Organic solvents |
| Explosion-proof | Ex-proof motor and instruments (Ex d IIC T4) |
| Separator | Matching gas-liquid separator, cooling water tank |
| Piping | SS flexible hose, bellows |
| Control system | VFD, constant vacuum auto-control |
9. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| New Equipment | 12 Months | Pump body, rotor/vanes, seals, motor |
| Refurbished Equipment | 6 Months | Pump body, rotor/vanes, seals, motor |
| Idle Equipment (As-is) | 3 Months | Main functional parts |
Note: Vanes and seals are wear parts. Final terms subject to contract. All orders include installation guidance and remote debugging.
10. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Pump Body | Wooden box |
| Motor | Wooden box |
| Separator/Tank | Bare or wooden box |
| Accessories/Pipes | Wooden or carton box |
Container capacity estimate (for reference only): small pumps (≤5.5kW) approx. 10～20 units per 20'GP; medium pumps (5.5～30kW) approx. 3～8 units per 40'HQ. Installation: on-site installation supervision available.
11. Information Required for Quotation
To receive an accurate quotation, please provide: name of the gas or medium to be pumped, its temperature, and whether it contains dust, moisture or corrosive components; required pumping speed and target vacuum; backing-pump arrangement (required for Roots/screw pumps); working fluid type (for liquid-ring pumps); explosion-proof requirements; local voltage and frequency; equipment condition preference (new/refurbished/idle); delivery terms (FOB/CIF/DDP); destination port or delivery address.