1 In order too make sure of homogeneous dyeing disteibution across the fabric width,two patented specially-designed near-contact-free width expanders are at work independently of each other,allowing fabrics to enter into dyeing solution reliably at a constant tilt to minimize the colour differecne tetween edge and middle in the effective way. 2 A closed-circuit system is designed to guarantee dye solution in the vat without any risks of developing stagnant water flow sections 3 The improtde frenquency inverter from European origing of produce is preferred for its constant speed and stretch following a self-controlled torque pattern.In particular,this model features consistent fabric stretch control making it ideal for use in high-stretch fabrics dyeing operation.