Flow Control - Valves
Home > Flow Control Products > Vibration Eliminators
Vibration Eliminators
Derwent Industries AVFI vibration eliminators also called “rubber expansion joints” or “vibroshocks”, are an ideal pipe joint providing high flexibility, high tightness and good resistance to medium and climate. Derwent Industries AVFI vibration eliminators are widely used in pipeline projects to manage pipe work expansion, vibration, slight misalignment and where inline chemicals transfer is involved. Derwent Industries AVFI vibration eliminators are available with mild steel and stainless steel rings with design options including single sphere and double sphere. AVFI’s vibration eliminators range in size from DN 32 (32 mm) to DN 1200 (1200 mm). For full details please refer to Derwent Industries AVFI vibration eliminator data sheet for full details.
ASF10 - Spherical Rubber Expansion Joint
- Minimal axial dimensions
- Limited Weight
- Low warping forces
- High-resistance to work
- High-capacity acoustic damping
Applications
- Other rubber materials such as Hypalon, Nitrile, Neoprene & Viton available on request.
- Stainless steel backing rings.
- Threaded barrel union connections.
- Reducer type.
- Control arms.
- DIN drilled one end and AS2129 other end.
- PN10 & PN25 pressure rating.
Downloads
| Product Code | Description |
|---|---|
SIZE RANGE: | DN32 – DN600 (other sizes available on request) |
PRESSURE RATING: | PN16 (Standard) |
VACUUM: | PN16 650mmHg (Standard) |
TEMPERATURE RANGE: | -200C to +200°C (depending on tube material) |
DRILLING PATTERN: | AS2129 T/E (Standard) |
PRESSURE TESTS: | 3 times maximum rated pressure |
FAQ
What are vibration eliminators and how do they work?
Vibration eliminators—also referred to as rubber expansion joints or “vibroshocks”—are flexible pipe connectors engineered to absorb physical stress within piping systems.
- Operating Principle: Constructed with resilient elastomeric bodies (in single sphere or double sphere configurations), they absorb thermal expansion, mechanical vibration, water hammer, and minor pipe misalignments while maintaining a tight, leak-proof seal.
- Acoustic & Mechanical Protection: They feature high-capacity acoustic damping to dampen pump noise and structural vibration, reducing mechanical wear and low warping forces on connected pumps, valves, and turbines.
What size ranges, pressure ratings, and configurations are available?
Derwent Industries supplies a versatile selection of rubber expansion joints designed for civil, industrial, and chemical processing pipelines:
- Size Range: DN 32 (32 mm) to DN 1200 (1200 mm).
- Pressure Ratings: Standard options including PN10 and PN25 pressure classes.
- Sphere Designs: Single sphere (compact design like the ASF10) and double sphere configurations for greater movement allowance.
- End Connections & Rings: Supplied with mild steel or stainless steel backing rings, threaded barrel union connections, reducer types, and custom flange drillings (such as DIN drilled on one end and AS 2129 on the other).
What materials and custom options can be requested?
Depending on the conveying medium and working environment, custom options include:
Elastomer Options: EPDM standard, with specialized compounds such as Hypalon, Nitrile, Neoprene, and Viton available on request for chemical and hydrocarbon compatibility.
Control Rods / Limit Arms: Optional control arms to prevent over-extension or excessive compression under high pressure surges.
Hardware: Stainless steel backing rings for corrosive or marine environments.
What are the primary applications for Derwent Industries vibration eliminators?
Vibration eliminators are used across water networks, HVAC systems, and industrial processing lines:
- Pump & Turbine Connections: Placed at pump suctions and discharges to isolate motor vibration and prevent noise transmission through the building or plant structure.
- Pipeline Expansion Management: Absorbs linear axial expansion/contraction caused by seasonal temperature variations.
- Inline Chemical & Fluid Transport: Selected with appropriate rubber liners (e.g., Viton or Nitrile) for chemical transfer and industrial process lines.
Product Summary: ASF10 Spherical Rubber Expansion Joint
| Feature | Specification / Capability |
|---|---|
| Model | ASF10 - Spherical Rubber Expansion Joint |
| Size Range | DN 32 to DN 1200 |
| Pressure Ratings | PN10 and PN25 |
| Key Performance | Minimal axial dimensions, lightweight, low warping forces, high acoustic damping |
| Backing Rings | Mild Steel (standard) or Stainless Steel |
| Elastomer Options | EPDM, Nitrile, Neoprene, Hypalon, Viton |
| Customisations | Control arms, reducer designs, threaded barrel unions, hybrid flange drillings (DIN / AS2129) |