NBR Rubber X-ring

NBR Rubber X-ring   Material: NBR Rubber Hardness: 70A Color: Black   The X-Ring has four lips to seal, its property is improved and advanced based on the O-Ring. Compare with O-ring, its friction and jump-start resistance is smaller as there are the lubricative cavum among the lips. As the mold closed line of X-rig is in the concave, so, its sealed effect is very good. Besides,its section is not round which can avoid the roll in reciprocated motion.