JDX Rubber Variable Diameter JointDetailed product description：

JDX type variable diameter rubber joint (also known as reducing rubber joint, big and small head), the variable diameter rubber joint is mostly made of three sphere rubber. The variable diameter rubber joint fundamentally solves the installation problem of concentric pipes with different diameters. At the same time, the variable diameter rubber joint has the characteristics of free expansion and contraction, vibration reduction and noise reduction, and high pressure and high temperature resistance. Variable diameter rubber joints are suitable for the inlet and outlet of water pumps and various concentric but different diameter pipelines. They are easy to install and disassemble, and play an essential role in pipeline systems. The characteristic of variable diameter rubber joints is that they can solve the problem of different diameters when connecting metal pipes, and also have the function of shock absorption and noise reduction, which can save pipeline installation parts and reduce costs. The variable diameter rubber joint consists of an inner rubber layer, nylon curtain fabric reinforcement, an outer rubber layer composite rubber ball, and a loose metal flange. Variable diameter rubber joints have the characteristics of high pressure resistance, good elasticity, large displacement, balanced pipeline deviation, good vibration absorption, noise reduction effect, and easy installation. Variable diameter rubber joints are widely used in water supply and drainage, circulating water, HVAC, fire protection, paper making, pharmaceutical, petrochemical, ship, pump, compressor, fan and other pipeline systems. Ordinary variable diameter rubber joints are used for conveying air, compressed air, water, seawater, oil, acid, alkali, etc. at temperatures ranging from -15 ℃ to 120 ℃. Special type variable diameter rubber joints are used for conveying the above-mentioned media or oils, concentrated acids and alkalis, and solid materials above -30 ℃ to 250 ℃.

Large × DN Small	Length (L) (MM)	Axial displacement (mm)		Lateral displacement (mm)	Angular displacement （a1+a1）°	DN large × DN small	length （L） （MM）	axial displacement （MM）		Lateral displacement (mm)	Angular displacement （a1+a1）°
		stretch	compress					stretch	compress
80×40	one hundred and eighty	twenty	thirty	forty-five	35°	200×100	two hundred	twenty-two	thirty	forty	35°
80×50	one hundred and eighty	twenty	thirty	forty-five	35°	200×150	two hundred	twenty-two	thirty	forty	35°
80×65	one hundred and eighty	twenty	thirty	forty-five	35°	200×125	two hundred and twenty	twenty-five	thirty-five	forty	30°
100×50	one hundred and eighty	twenty	thirty	forty-five	35°	250×200	two hundred and twenty	twenty-five	thirty-five	forty	30°
100×65	one hundred and eighty	twenty	thirty	forty-five	35°	300×200	two hundred and twenty	twenty-five	thirty-five	forty	30°
100×80	one hundred and eighty	twenty	thirty	forty-five	35°	300×250	two hundred and twenty	twenty-five	thirty-five	forty	30°
125×65	one hundred and eighty	twenty	thirty	forty-five	35°	350×200	two hundred and twenty	twenty-five	thirty-five	forty	30°
150×50	one hundred and ninety	twenty	thirty	forty-five	35°	350×300	two hundred and twenty	twenty-five	thirty-eight	thirty-five	30°
150×80	one hundred and ninety	twenty	thirty	forty-five	35°	400×350	two hundred and twenty	twenty-five	thirty-eight	thirty-five	30°
125×80	two hundred	twenty-two	thirty	forty	35°	500×400	two hundred and thirty	twenty-eight	thirty-eight	thirty-five	26°
125×100	two hundred	twenty-two	thirty	forty	35°	600×400	two hundred and forty	twenty-eight	thirty-eight	thirty-five	26°
150×100	two hundred	twenty-two	thirty	forty	35°	600×500	two hundred and forty	twenty-eight	thirty-eight	thirty-five	26°
Note: 1. Rubber joints with a diameter of DN200 or above, high pressure For use in high-rise buildings, pipelines must have fixed supports or brackets, otherwise the variable diameter rubber joints must have anti pull devices.