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Dry screw vacuum pump

Dry screw vacuum pump

 

Dry screw vacuum pump has the advantages of high operation efficiency, long life cycle, compact size and low maintenance charge. The dry screw pump adopts advanced German screw type line technology, and upgrade to improve combining with the characteristics of chemical pharmaceutical. With lower Exhaust temperature, high efficiency, Suitable for the gas suction containing flammable, explosive, corrosive, poisonous, and condensate. Possess the advantage of high safety, full closure and the characteristics of high efficiency energy saving.

Principle

The rotor of DH series dry screw vacuum pump is a pair of screw with small gap and no-contact. By synchronizing gear, drive toward the gas movement to the exit.

Technical features:

  1.  The screw adopts Varying pitch contour line, and the compression and thermodynamic properties international advanced.
  2. Purity system with no oil and no water, totally closed working process, specially suits for the recycling of chemical gas medium, and can be applied for high purity vacuum process.
  3. High processing precision for the parts, all metal parts out of contact in operation, less wear, Dynamic characteristic optimization, long life.
  4. High precision dynamic balance, low vibration, low noise, high reliability
  5. Flow surface through special coating treatment, can take a corrosive gas and meet the needs of a special process
  6. Either as a single pump operation, also can be running as a backing pump
  7. Less parts, high stability, low maintenance cost, easy to operate
  8. Partition between continuous extraction, non-polar space block, short extraction path, avoid condensation gas condensation and corrosion pump cavity
  9. Compact type units, high automatic control level of integration, small occupation space
  10. Use the multiple seal, such as mechanical, maze and nitrogen sealing, implement closed transmission for flammable, poisonous and harmful gas

Technical index

DH series
Technical index DH-160A DH-250A DH-400A DH-630A
Nominal pumping speed m3/h 132 216 350 630
Ultimate pressure Pa ≤1 ≤1 ≤1 ≤1
Motor power KW 5.6 7.5 7.5 15
Motor frequency Hz 50 50 50 50
Rotating speed rmp 2950 2950 2950 2950
Environment temperature ℃ 5-40 5-40 5-50 5-50
Nitrogen flow I/min 6-10 6-10 2-3 5-7.5
Cooling water flow I/min 5 5 6 6
Noise dB(A) ﹤75 ﹤75 ﹤66 ﹤75
Air inlet flange connection   KF50 ISO63 ISO63 ISO100
Air-vent flange connection   KF50 KF50 ISO40 ISO40
Weight Kg 300 330 460 550
Overall dimension (L×W×H) 1125×575×649 1190×575×649 1329×480×638 1500×522×689
Explosion-proof grade       Ex d II BT4-Gb Ex d II BT4-Gb

 

Installation sketch:

DXH-250A, DXH-160A installation sketch DXH-630A, DXH-400A installation sketch
Dry screw vacuum pump

 

 

A

B

C

D

E

F

G

H

I

J

DXH-160A

1125

181

100

542

309

100

575

130

295

198

DXH-250A

1190

122

107

542

309

100

575

135

295

198

DXH-400A

1329

777

372

1025

50

1154

355

480

592

638

DXH-630A

1500

819

485

1100

100

1327

392

522

649

689

 

Pumping speed curve:

DXH-250A and DXH-160A pumping speed curve DXH-630A and DXH-400A pumping speed curve
Dry screw vacuum pump Dry screw vacuum pump

 

 

 

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