Double Stage Vacuum Pumping for Transformer

  • Double-stage vacuum pumping for transformers produced by YUNENG is fast in start-up and pumping.
  • Due to its speed, it is especially suitable for the vacuolization of transformers.
  • Besides transformers, it can also be used for vacuumizing in various industries, including vacuum metallurgy, welding, chemistry, pharmacy, coating, and electronics.

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Parameters of Double Stage Vacuum Pumping for Power Transformer

Parameter Unit ZJ-70 ZJ-150 ZJ-300 ZJ-600 ZJ-1200
Power Supply 50Hz    380V    3-Phase 4-Wire  (or as requested)
Power Supply KW 4 6.5 7 11 18.5
Limit Vacuity Pa ≤3
Pumping Speed L/S 70 150 300 600 1200
Pumping Level 2
Connection Diameter mm 50 80
Size Length mm 1200 1300 1400 1600 1750
Width mm 950 100 1100 1200 1300
Height mm 1500 1600 1700 1900 2100
Weight Kg 300 400 500 1250 1560

The machine size and weight will change slightly due to different configurations

What is Double Stage Vacuum Pumping for Transformer?

In most cases, a 2-stage pump will go down below 1 micron .001mm mercury vacuum. A single-stage pump is generally specified out at less than 15 microns .015mm mercury vacuum. 2 stage pumps are more expensive than a 1 stage pump because they have a high vacuum stage, what we refer to as an exhausting stage.

Advantages of Double Stage Vacuum Pumping for Power Transformer

  1. Double Stage Vacuum Pump System for power transformer oil filtration machine has a GIS connection.
  2. It features digital vacuum degree management, anti-absorption, fast start, strong vacuum pumping capacity, stable performance, and easy operation.
  3. There is a combination of axial fan and condenser to deal with moisture and gas from the vacuum pump and roots pump. It can prolong the time to change vacuum oil while meeting emission standards.
Double Stage Vacuum Pumping for Transformer
Double Stage Vacuum Pumping for Transformer

Flow Chart of Double Stage Vacuum Pumping for Power Transformer

Flow chart of ZJ series vacuum pumping unit

Packaging & Shipping

To be packed in iron or wooden case(s) for long-distance (ocean/air) transportation


Rich Experience

Leading manufacturer in industrial oil and gas treatment with more than 25 years experiences.

Tailored Design

Specializes in making your systems suit your needs & requirements. Every system is custom engineered & custom designed. 

Professional Technical Team

Professional pre-sales, in-sale and after-sales service team to meat customer’s requirement

Reliable Quality, Durable System

Top-quality components and workmanship ensure high performance