... 's used for dyeing and bleaching all kinds of bobbin yarn with thematerial of cotton, polyester, nylon, wool, hemp and blended yarns.Main Purpose ... 130°C to 80°C.Recycling method of dyeing liquid:The positive and negative recycling of dyeing liquid will be adjusted by the ... there is no air exhausted from the exhaust valve and the reading of pressure gauge is zero,withdraw the wrench handle,open ...