Transformer Dry Air Generator For Transformer Substation Maintenance
REXON DAG series Transformer Dry Air Generator is specially designed for transformer and reactor maintenance at substations. It provides high-purity dry air with a dew point as low as -70°C, ensuring excellent insulation conditions inside electrical equipment. Compared to traditional bottled gas, it is safer, more economical, and convenient. Using advanced composite molecular adsorbents and a heat-free regeneration system, this unit continuously delivers dry air to prevent moisture contamination during transformer oil draining, inspection, and repair.
Model: DAG-100
Gas supply capacity: 100M3/h
Working pressure: 0.6~0.8MPa
Supply pressure: 0.05~0.5MPa
Gas dew point: ≤-70°C
Filtration accuracy: 0.01μm
Exhaust oil content: ≤0.003mg/m3
Solid particle concentration: ≤0.01mg/ m3
Dry air temperature: 20~50°C adjustable
Work cycle: 5- 30 minutes adjustable
Adsorbent material: Strong composite molecular adsorbent (from REXON)
Regeneration method: no heat automatic (no heating required)
DAG-100 product performance indicators
Gas dew point: ≤-70°C
Filtration accuracy: 0.01μm
Features:
1. Adopts low-pressure, condensation technique, with the merits of small dimension, light weight, easy operation, energy saving, and reliability.
2. With double screw air compressor, low temperature condensed to water technology, etc.
3. Comprehensive utilization of dryer, blot machine, ultra precision filter merits, such as scientific combination, produces high-quality quality low dew point of the dry air.
4. The native integration design, compact structure, and reasonable, good drying effect, low gas consumption, long working life, composite desiccant use effect is good, service life of the ordinary adsorbent is extended more than three times.
5. Regenerative adsorption dehydration technology, the high accuracy coalescence dehydration, 0.01μm precision filters to ensure cleanliness.
Model: |
DAG-60 |
DAG-100 |
DAG-200 |
Air supply capacity |
60M3 / Hour |
100M3 / Hour |
200M3 / Hour |
Working pressure |
0.6 ~ 0.8Mpa |
Air supply pressure |
0 ~ 0.3Mpa |
Air supply dew point temperature |
-55 ºC ~ -80 ºC |
Filtration accuracy |
0.01µm |
Duty cycle |
5-30Min adjustable |
Adsorption material |
Strong composite molecular adsorbent |
Regeneration method |
Automatically, without heating (no heating required) |
Running noise |
≤75dB (A) |
Interface pipe diameter |
32mm |
Ambient temperature |
-10 ~ 40 ºC |
Working power |
380V, Three-phase three-wire,50Hz (Or As Required) |
Air compressor power |
7.5KW |
15KW |
22KW |
Total power |
8.5KW |
16.5KW |
24KW |
Dimensions |
1750 × 1450 × 1940mm |
2150 × 1850 × 2350mm |
2300 × 2000 × 2450mm |
Equipment weight |
800kgs |
1350Kgs |
1550Kgs |
Continuous working time |
≥200 hours |
Mean time between failures |
≥5000 hours |
Factory View
Auto Control System
Rexon Client Onsite Project



Chongqing Rexon Oil Purification Co., Ltd is a leading oil purifier manufacturer and oil purification technology development company, we specialized in designing, producing, developing and selling various types of oil purification equipment such as transformer oil purifier, turbine oil purifier, lube oil purifier, hydraulic oil purifier, engine oil purifier, ship oil filtration plant, used cooking oil purifier, centrifuge oil separation purifier and all other industrial oil purification machines. We offered professional oil solutions service and oil purifier machines for worldwide customers near 20 years.
We have a number of national-class oil purification experts and experienced technology engineers, mechanical designers, machine engineers, well-skilled workers, and responsible sales persons as a strong team of our REXON group.
We adhere to the concept of mutual-benefit and win-win for business, with our honest and sincere spirit, pragmatic and serious work attitude, professional and responsible faith, we'd like to do our long-term commitment to all our customer that we will always make great effort to provide you the best oil purifying equipment with high cost performance, high reliability, and high intelligent & automatic operation mode. Better price, Better quality, and Better service! Hope to cooperate with you soon, and let's open up a new oil purification era and save oil energy together.
Q: Is this machine suitable for outdoor or field work?
A: Yes, it is portable and designed for on-site transformer or substation maintenance.
Q: Does it require heating for regeneration?
A: No, it uses a heat-free, automatic regeneration system to maintain drying performance.
Q: How does it compare to using bottled nitrogen?
A: Our dry air generator is safer, more cost-effective, and easier to use continuously without oxygen suffocation risk.
Q: Can it be customized for different capacities?
A: Yes, REXON offers customized models based on your project needs
-We will help to arrange the transport and shipping of the machine to the customer.
-We offer a full set of documents for customs clearance at the customer's destination port.
-We will offer lifetime technical support for our equipment, free technical upgrade, free or chargeable spare parts supply, etc.
-We offer online service for customers 24 hours a day. If you have any questions while using our machine, you can contact us by online chat software, or by email, phone etc, We will get back to you very soon within 4 hours.
-We will also offer operation training for free in our factory and offer door-to-door service to send our engineer to your place for the machine's installation service and operation training if needed.
-Installation, Operation, and Maintenance details will be in the operation manual booklet and videos, which will be sent to you with the machine.
-Rexon's guarantee time is two years for each piece of our equipment.
For more information, please contact us. And kindly leave your Email, Tel, and Mobile No. etc., then we can provide feedback to you immediately. Thank you!