DN300 Flange Type NBR Single Sphere Flexible Expansion Connection Rubber Compensator Joint

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

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.

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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