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Structural characteristics and working principle:

 When the drain valve does not start, free semi ball float settles over the transmitting tube. When the drain valve is in the drainage state, the steam will be enter into the valve body through filter screen and transmitting tube. When the steam volume increases to certain degree, the steam ball float will float under the action of float force and seal the drain valve nozzle under the action of steam pressure and keep from overflow of steam. When a large amount of condensate water enters into the valve body, the steam volume in semi ball float will be separated from the nozzle and then a work cycle is completed .The unit operated in cycles and reaches the purpose of automatically drainage and air-water block.

Structural characteristics and using range:

steam pipeline to automatically remove the condensate water, prevent from leakage of steam, and exhaust the air. The products can be widely used in the industrial and mining establishments of chemical industry, refinely, electric power, light textile, paper-making, etc. expecially applicable for steam equipment with high requirement to low pressure, large displacement , and thermal stability, no condensate water detention.