Difference and application of concentric and eccentric reducing rubber joints: Reducing rubber joint is used to connect pipelines in different diameter. Generally it is divided into concentric rubber joint and eccentric rubber joint. Eccentric reducing rubber joint, whose center of circle is not on a same line. It applies to pipeline setting which close to wall or ground, in order to save space, and connect two pipelines in different diameters to change flow rate. For rubber joint whose center of circle is on a same line, it is called concentric reducing rubber joints. Concentric reducing rubber joint mainly used for gas or vertical liquid pipeline reducing. Eccentric reducing rubber joint’s pipe orifice is circumference inscribe, usually applies to horizontal liquid pipeline, when pipe orifice’s point of contact upward, that is flat on top installation, usually used in pump entrance, beneficial for exhausting; when point of contact downward, that is flat in bottom installation, usually used in regulating valve installation, beneficial for evacuation. Concentric reducing rubber joint is in favour of fluid flow, light flow state disturbance when reducing, that’s the reason why gas and vertical liquid pipeline use concentric reducing rubber joint. Since one side of eccentric reducing rubber joint is flat, it is convenient for gas or liquid exhausting, also maintenance, that’s the reason why horizontal installation liquid pipeline use eccentric reducing rubber joint.The eccentric reducing rubber soft joint is very soft and light. Eccentric reducing rubber joints can be used for the connection of pipelines and the protection of pump valves. When the equipment is in a special working environment, it can play a better role. Eccentric rubber joints with different diameters have the properties of high pressure resistance, good elasticity, large displacement, balanced pipeline deviation, shock absorption and noise reduction. It is widely used in drainage, circulating water, HVAC, paper making, pharmaceuticals, fan piping, etc. Eccentric reducing rubber joints are corrosion resistant. In a highly corrosive environment, rubber joints with different diameters should be used as shock absorbers.