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Dry screw vacuum pump

Screw vacuum pump

I. Product Overview 

The screw vacuum pumps produced by our company cover various series such as dry type and anti-corrosion type. They are custom-made using high-quality cast iron, 304/316L stainless steel, titanium alloy, Hastelloy C276, etc. They feature stable operation, energy-saving and high efficiency, corrosion resistance, and no oil pollution. They are suitable for special working conditions in industries such as chemical, pharmaceutical, electronics, and metallurgy. They can be used alone or in conjunction with vacuum units to meet various customized vacuum operation requirements.


Product Details

II. Core Performance Parameters

Parameter Name

Conventional parameters

Anti-corrosion type (stainless steel / titanium alloy / Hastelloy alloy) parameters

Vacuum extraction rate

10-2000m³/h

10-1500m³/h

Limit vacuum level

≤1Pa（Dry type）、≤10Pa（Fine oil）

≤1-5Pa

Work stress range

From atmospheric pressure to absolute vacuum

From atmospheric pressure to absolute vacuum

Motor power

2.2-90kW

2.2-55kW

Speed

2900rpm（Variable frequency adjustment）

2900rpm (Variable frequency adjustable)

Noise index

60-78dB(A)

65-75dB(A)

Cooling method

Air-cooled / Water-cooled

Water cooling is the main method. For special conditions, air cooling can be customized.

Working temperature of the pump body

≤80-120℃

≤80-100℃

　

III. Structural Material Parameters 

Regular model 

○ Pump body material: HT300 gray cast iron, ductile iron 

○Rotor material: QT600 40Cr, 38CrMoAl (nitrided) 

○ Sealing method: Mechanical seal + labyrinth seal / frame oil seal 

2. Customized anti-corrosion models 

○ Pump body material: 304/316L stainless steel, titanium alloy, Hastelloy C276 

○Rotor material: The same as the anti-corrosion material of the pump body, resistant to strong acids, strong alkalis and corrosive gases. 

○ Sealing type: Corrosion-resistant mechanical seal, suitable for corrosive medium working conditions 

IV. Interface Specification Parameters 

Intake / Exhaust Flange Diameter: DN25, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN20 

European standard: ISO-K, KF, RF. Interface specifications can be customized according to customer requirements. 

V. Applicable Operating Conditions Parameters 

•Pulverizable media: Air, water vapor, organic solvent vapor, various corrosive gases, small amounts of dust and particulate media 

• Intake medium temperature: Regular ≤ 80℃, Special customized model ≤ 120℃ 

• Working environment temperature: -10℃ to 45℃ 

• Environmental humidity: ≤ 85% RH (no condensation) 

• Explosion-proof configuration: Customizable Ex d IIB T4 explosion-proof type, suitable for flammable and explosive working conditions. 

VI. Comparison Table of Typical Model Parameters

Model number

Draw rate (m³/h)

Absolute vacuum (Pa)

Motor power (kW)

Flange diameter (DN)

Applicable materials

LGB-30

30

≤1

2.2

40

Cast iron / Stainless steel

LGB-60

60

≤1

4

50

Cast iron / Stainless steel

LGB-110

110

≤1

7.5

65

Cast iron / Stainless steel

LGB-160

160

≤1

11

80

Cast iron / Stainless steel

LGB-200

200

≤1

11

80

Cast iron / Stainless steel

LGB-300

300

≤1

15

100

Cast iron / Stainless steel

LGB-600

600

≤1

30

125

Cast iron / Stainless steel

LGB-1000

1000

≤1

45

150

Stainless steel / Titanium alloy

LGB-1500

1500

≤1

55

200

Stainless steel / Titanium alloy

VII. Customized Service Description 

It can be customized with different materials, suction rates and vacuum levels according to the customer's working conditions, to provide a screw vacuum pump. 

2. Can be paired with Roots vacuum pumps or reciprocating vacuum pumps to form an integrated vacuum unit. 

3. Provide exclusive vacuum solutions that are suitable for special media, special temperatures, and special pressure conditions. 

|Service hotline: 0533-8225516  1506431898


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