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Double-stage vertical oil-free reciprocating vacuum pump

Double-stage vertical oil-free reciprocating vacuum pump

I. Product Overview 

Our 2 WL/2WLW series vertical oil-free reciprocating vacuum pumps are designed with a vertical structure and an oil-free self-lubrication system. During operation, there is no oil contamination, and the maintenance is simple and convenient with a long service life. The products are suitable for various industrial applications such as chemical, pharmaceutical, food, electronics, metallurgy, and environmental protection that require high cleanliness in the vacuum environment. They can extract clean air, steam, inert gases, and small amounts of non-corrosive dust. They can operate independently or be combined with Roots vacuum pumps to form a vacuum unit, meeting the vacuum operation needs in different scenarios. The full stainless steel series, titanium alloy series, and Hastelloy alloy series can meet the customer's requirements for extracting corrosive gases.



Product Details

II. Core Basic Parameters 

Air extraction rate: 30 – 600 L/s (108 – 2160 m³/h) 

2. Maximum vacuum level: ≤ 50 Pa (0.5 Torr / 2.0 kPa) 

3. Working pressure range: From atmospheric pressure to absolute vacuum 

4. Motor type: Y series three-phase asynchronous motor, customizable with anti-vibration features. 

5. Speed range: 200 – 400 r/min (constant speed operation) 

6. Cooling method: Standard configuration is water cooling. For special working conditions, air cooling can be customized. 

7. Pump temperature rise: ≤ 40℃ 

8. Noise level: 70–80 dB (A) 

9. Working environment temperature: -10℃ to 45℃ 

10. Environmental humidity: ≤ 85% RH (no condensation) 

III. Structural and Material Parameters 

• Pump body material: HT250 gray cast iron, sturdy and durable, resistant to deformation 

• Piston / Cylinder Liner: Stainless steel inner lining, highly durable and corrosion-resistant, suitable for oil-free lubrication 

• Sealing method: Oil-free piston ring + special packing seal, no need to change the oil, strong sealing performance 

• Lubrication method: Oil-free self-lubrication, completely eliminating the possibility of the medium being contaminated by oil residues. 

• Cooling water pipe specifications: Φ15mm / G1/2" to G3/4" 

IV. Interface Specification Parameters 

Inlet / Outlet Flange Diameter: DN50, DN75, DN100, 125mm, 160mm, 200mm, 250mm, 320mm 

European standard: RF concave standard flange, customizable with various interfaces such as ISO-K, KF, etc. 

V. Detailed Parameter Table of Typical Models in the WLW Series

Model number

Draw rate (L/s)

Draw rate (m³/h)

Absolute vacuum (Pa)

Motor power (kW)

Speed (r/min)

Inhalation / Exhalation aperture

Specification of cooling water pipes

Equipment weight (kg)

Noise (dB (A))

2WLW-30

30

108

≤2600

3

400

DN50

Φ15mm

350

≤70

2WLW-50

50

180

≤2600

4

355

DN50

Φ15mm

500

≤70

2WLW-100

100

360

≤2600

7.5

350

DN100

Φ15mm

820

≤75

2WLW-150

150

540

≤2600

11

320

125mm

Φ15mm

1200

≤78

2WLW-200

200

720

≤2600

15

310

125mm

Φ15mm

1400

≤80

2WLW-300

300

1080

≤2600

22

300

160mm

Φ15mm

1850

≤80

2WLW-400

400

1440

≤2600

30

280

160mm

Φ15mm

2200

≤80

2WLW-600

600

2160

≤2600

45

200

DN200

Φ15mm

3100

≤80

VI. Applicable Conditions and Customized Services 

1. Extractable media: Clean air, steam, inert gas, non-corrosive organic vapors, a small amount of dust. By changing the material of the flow passage components, corrosive gases can also be extracted. 

2. Intake medium temperature: Standard ≤ 80℃, Customizable high-temperature resistant model (≤ 120℃) 

3. Customization Options: Available in Ex d IIB T4 explosion-proof model, anti-corrosion material model, special caliber model, and variable frequency speed control model. 

4. Ancillary Services: Can be combined with Roetz vacuum pumps, vacuum tanks, and electronic control systems. Customized integrated vacuum units are available, and exclusive vacuum solutions are provided. 

Service hotline: 0533-8225516  1506431898



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