Fire damper machine produced as clients drawing is ready for inspection. Lock is No.1 major for fire damper machines in China.
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Spiral tube former and duct making machine inspection before landing. At present, COVID-19 is on pandemic. Foreign customers inspect equipment through online video or short video.
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As the epidemic gradually passed, the sea freight for export abroad gradually decreased. Export business has gradually recovered. Welcome new and old customers to inquire.
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The Chinese New Year holiday is over. In the new year, we hope that new and old customers will support LOCK as always, and we will still give back to you with the best quality and after-sales.
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Duct machine cutting line to Russia. Semi duct making line is good tool to produce duct.
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Dimensions outside rectangular ducts and diameters outside circular ducts are calculated. The ventilation pipes are made of thin steel plate, galvanized steel plate or aluminium plate and stainless steel plate with a thickness of 0.5-2MM. It has little influence on the size after deployment, so it can be neglected when deploying lofting, but for the air duct with special wall thickness and missing, when the wall thickness of the common plate is greater than 2MM, the influence of the wall thickness must be considered. That is to say, for the unfolding and blanking of the circular air duct, the calculation of the diameter should be based on the medium diameter, and for the rectangular air duct, the air duct should still be based on the air duct. External dimension expansion.
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