DN300 Flange Type NBR Single Sphere Flexible Expansion Connection Rubber Compensator Joint
A Single Sphere Rubber Expansion Joint (also known as a rubber compensator, flexible rubber joint, or rubber bellows) is a highly flexible piping component designed to absorb movement, reduce vibration, and compensate for misalignment in pipelines while maintaining a leak-proof seal.
Key Features:
Nominal Diameter (DN): 300 mm
Structure Type: Single Sphere Rubber Expansion Joint
Flange Type: Carbon steel or galvanized steel, drilled to ANSI, DIN, JIS or custom standards
Rubber Material: NBR (Nitrile Butadiene Rubber) – Excellent oil resistance
Reinforcement: Multi-layer nylon cord and steel wire for pressure resistance
Design Pressure: Usually PN10 / PN16 / PN25 (confirm as per project)
Movement Capability: Axial compression/extension, lateral offset, angular deflection
Temperature Range: -10°C to +80°C (depending on fluid compatibility)
Product Parameters
| Name of product | DN300 flange type NBR single sphere flexible expansion connection rubber compensator joint |
| Structure of product | Inner and outer rubber,nylon cord fabric,steel wire and flange |
| Material of rubber | EPDM, NR, NBR,PTFE, FKM,etc |
| Material of flange | SS304,SS316,carbon steel, ductile iron,etc |
| Standard of flange | DIN, BS, ANSI, JIS,etc. |
| Product classification | Single sphere , Double sphere, Union type,etc |
The single sphere rubber expansion joint consists of:
Rubber Body (Elastomer): Typically made of NBR (Nitrile Rubber), EPDM, Neoprene, or FKM (Viton) depending on the application.
Reinforcement Layers: Embedded fabric or steel wire to enhance pressure resistance.
Flanges or Pipe Ends: Available in flanged (ANSI, DIN, JIS, etc.) or threaded/sleeve-type connections.
Single Arch (Sphere) Design: Provides flexibility for axial, lateral, and angular movement.
Product details display
Key Functions
✔ Vibration & Noise Damping: Reduces stress from pumps, compressors, and machinery.
✔ Shock Absorption: Protects pipelines from water hammer and pressure surges.
✔ Misalignment Compensation: Allows slight pipe deviations without rigid connections.
✔ Thermal Expansion Compensation: Accommodates temperature-induced pipe expansion/contraction.
✔ Chemical & Corrosion Resistance: Depending on rubber material (e.g., EPDM for acid , NBR for oils).
Rubber Expansion Joint Product Processing
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DN300 Flange Type NBR Single Sphere Flexible Expansion Connection Rubber Compensator Joint Images
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