Nursery seedlings have been widely used in a variety of soilless cultivation, sometimes using rock wool seedling cultivation. The use of planting seedlings is also very extensive. The rock wool blocks used for growing seedlings can be specifically determined according to the requirements of the crop type and seedling age. The commercially available rock wool nursery blocks have the following specifications: 333 cm, 444 cm, 555 cm, 7.57.57.5 cm, and 10105 cm. There is a nursery seedling block consisting of a set of 2 to 3 rock wool blocks of different sizes. There is a small square hole in the middle of the large rock wool block, which can be embedded in a small rock wool block. When used, it is first used in small rock wool blocks. When the young seedlings grow to a certain time, the small rock wool blocks are put into the big rock wool blocks, so that the young seedlings will continue to grow. This method of raising seedlings is called the “birgar seedlings” seedling raising.

Onsite Oxygen Cylinder Filling System

Oxygen Cylinder Filling System

With PSA principles, ETR oxygen cylinder filling system can produce 93%±3% purity oxygen gas from compressed air directly. ETR oxygen cylinder filling system is consisted of Atlas screw air compressor, refrigerated air dryer, compressed air filter, air buffer tank, ETR oxygen plant, oxygen buffer tank, oxygen booster, cylinder filling station and HMI control cabinet.


Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure. With an oxygen booster, the oxygen pressure can be to 150bar and fill in cylinders.

Eter Oxygen Cylinder Filling Plant

Onsite Oxygen Cylinder Filling System,Oxygen Refilling System ,Oxygen Cylinder Filling,Oxygen Refilling Machine

Hunan Eter Medical Co., Ltd. , https://www.eter-tech.com