Double Sphere Rubber Expansion Joint
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Double Sphere Molded Rubber Expansion Joints
Explore our wide range of double sphere molded rubber joints, engineered for superior flexibility, vibration absorption, and long-term durability. Available in various sizes, materials, and flange standards to meet different installation requirements. Ideal for HVAC, piping, water treatment, and industrial applications. Custom options with SS, ductile iron, or PVC flanges are also available.
Molded Threaded Double Sphere Rubber Expansion Joint
Our molded threaded double sphere rubber expansion joints are designed for small-diameter piping systems requiring flexibility, vibration absorption, and easy installation. The double sphere structure enhances movement compensation and noise reduction, while the molded body ensures uniform wall thickness and long-lasting performance. Equipped with BSP or NPT threaded ends, these joints are ideal for HVAC, water supply, and general industrial applications. Available in various rubber materials such as EPDM, NBR, and NR to suit different media and working conditions.
KST-L Type Molded Threaded Double Sphere Expansion Joint – Size Chart
Nominal Diameter (DN) | Thread Size (BSP/NPT) | Length (mm) | Axial Movement (mm) | Lateral Movement (mm) | Deflection Angle (°) |
|---|---|---|---|---|---|
| DN15 | 1/2″ | 200 | ±22 | ±22 | 40° |
| DN20 | 3/4″ | 200 | ±22 | ±22 | 40° |
| DN25 | 1″ | 200 | ±22 | ±22 | 40° |
| DN32 | 1-1/4″ | 200 | ±22 | ±22 | 40° |
| DN40 | 1-1/2″ | 200 | ±22 | ±22 | 35° |
| DN50 | 2″ | 200 | ±22 | ±22 | 25° |
| DN65 | 2-1/2″ | 240 | ±22 | ±22 | 25° |
Note:
Thread types: BSPT, NPT (customizable)
Threaded ends available in carbon steel, stainless steel, and other materials upon request
Rubber materials available: EPDM, NBR, NR, Neoprene
Temperature range: -20°C to +80°C
Suitable for water, air, and mild chemicals
KST-F Type Double Sphere Rubber Expansion Joint with Flanges – Size Chart
| DN (mm) | Inch | Length (mm) | Axial Extension (mm) | Axial Compression (mm) | Lateral Movement (mm) | Deflection Angle (°) |
|---|---|---|---|---|---|---|
| DN40 | 1½” | 155 | +25 | -40 | ±45 | 35° |
| DN50 | 2″ | 160 | +30 | -50 | ±45 | 35° |
| DN65 | 2½” | 170 | +30 | -50 | ±45 | 35° |
| DN80 | 3″ | 170 | +30 | -50 | ±45 | 35° |
| DN100 | 4″ | 220 | +35 | -50 | ±40 | 35° |
| DN125 | 5″ | 220 | +35 | -50 | ±40 | 35° |
| DN150 | 6″ | 220 | +35 | -50 | ±40 | 35° |
| DN200 | 8″ | 320 | +35 | -60 | ±35 | 30° |
| DN250 | 10″ | 320 | +35 | -60 | ±35 | 30° |
| DN300 | 12″ | 320 | +35 | -60 | ±35 | 30° |
| DN350 | 14″ | 320 | +35 | -60 | ±35 | 30° |
| DN400 | 16″ | 320 | +35 | -60 | ±35 | 30° |
| DN450 | 18″ | 330 | +35 | -60 | ±35 | 30° |
| DN500 | 20″ | 330 | +35 | -60 | ±35 | 30° |
| DN600 | 24″ | 330 | +35 | -60 | ±35 | 30° |
Note:
Flange standards: DIN, ANSI, JIS, BS, GB (customizable)
Flange materials: Carbon steel, stainless steel, ductile iron, galvanized steel
Rubber options: EPDM, NBR, NR, Neoprene, FKM (Viton)
Temperature range: -20°C to +120°C (depending on rubber type)
Suitable for HVAC, water supply, drainage, industrial pipelines, and pump systems