Description：
Metal support ring completely jacketed with synthetic rubber gives added strength while ensuring perfect sealing at lower bolt loads for large bore flanges. Due to the spherical elastomer body, the percompression can be reduced and still give better sealability. It suitable for enamel, glass and rough sealing face

Main specification：

Rutbber Material	Shore HardnessA	Temperature（℃）	Cross Section	Pressure（Kgf/cm²）
NBR	71±5	-25~90		25
FPMVITON	70±5	-25~120		25
EPDM	75±5	-20-230		30