... the cotton twill fabrics can combine with the rubber layer very perfectly. Comparing with the common rubber joints, JGD-A type quality is very ... , compressed air, water, sea water, oil, acid, alkali and so on. Special type used for transmission of -30°C ~ 250 °C ... . Flange connection comply with GB4216.3-4216.5 standard, if use other standard, need to notice again. Working pressure grade is ...