Suffixes 6XX, 8XX and 9XX of FLEXMOV® denote three jacket material options. Jacket grade directly determines media‑resistance, bending‑fatigue performance, temperature tolerance and anti‑ageing capability; improper selection results in premature cable failure. 6XX series uses PVC jacket with cost advantage and basic oil‑resistance, operating from ‑20 ℃ to +80 ℃, for dry‑indoor low‑speed short‑stroke drag‑chain applications. Its weaknesses include mediocre hydrolysis‑resistance, poor low‑temperature performance and incompatibility with cutting fluids and humid outdoor conditions. 8XX series applies TPE jacket with prominent hydrolysis‑resistance and microbial‑resistance and improved low‑temperature performance ranging from ‑40 ℃ to +90 ℃, suitable for humid‑moisture‑exposed and medium‑cycle scenarios widely seen in lithium‑battery and general automation equipment. 9XX series features high‑performance PUR jacket with resistance against oil, cutting coolant, UV and microbes, operating from ‑55 ℃ to +100 ℃ with optimal bending‑fatigue life for high‑speed, long‑stroke and coolant‑contact severe working conditions.
Selection shall comprehensively evaluate ambient medium, moving speed, stroke length and temperature. For dry‑indoor low‑speed short‑stroke conditions, economical 6XX‑PVC is acceptable. For humid‑moisture‑exposed medium‑cycle conditions, choose 8XX‑TPE. For high‑speed long‑stroke, coolant‑contact or low‑temperature environments, prioritize 9XX‑PUR. Cost‑driven blind adoption of low‑grade jackets leads to premature ageing and damage.