... 1.PLC control system. 2.Ethylene,propylene,vinyl chloride, etc. 3.V type, sign type, symmetry type, bad type of ... Chemical and Special Gas applications Compressor VW-4.2/8-20Products Information: Using new generation PLC control system, remote control touch screen ... , low noise level, safe operation and reliability. It is mainly used as surplus gas recycling and boost operations in chemical in dusty ...