... layer very perfectly. Comparing with the common rubber joints, JGD-A type quality is very well, it can ... bear much higher pressure. JGD-A type special feature:·The inner rubber layer is one ... water pumps, compressors, fans and other pipeline systems.The common type is used for transmission of -15°C ~ 115° ... water, oil, acid, alkali and so on. Special type used for transmission of -30°C ~ 250 °C ...