As mentioned, Shanghai Songjiang Group produces rubber expansion joints with several outstanding characteristics, making them an essential component in pipeline systems. Here is a detailed explanation of these characteristics to help you understand why and how to choose the right rubber expansion joint for high-pressure pumps.
Features of Shanghai Songjiang Group Rubber Expansion Joints
- High Pressure Resistance (Within PN25): The pressure resistance of rubber expansion joints is crucial, especially in high-pressure pump systems. Shanghai Songjiang Group’s rubber expansion joints can withstand a maximum pressure of 2.5MPa (25kg), making them suitable for most high-pressure applications. For pressures exceeding this limit, other types of joints, such as metal hoses, should be considered.
- Good Elasticity: The elasticity of rubber expansion joints helps absorb vibrations and shocks in the pipeline system, protecting the pipes and related equipment from damage. This is particularly important in high-pressure pump systems where significant vibrations occur during operation.
- Large Displacement: Rubber expansion joints can compensate for thermal expansion and contraction in the pipeline system, preventing deformation or damage due to temperature changes. This feature is especially vital in HVAC and industrial pipelines.
- Balancing Pipeline Deviation: In actual installations, pipelines may have some deviation. Rubber expansion joints effectively balance these deviations, ensuring the system’s sealing and stability.
- Vibration Absorption and Noise Reduction: The vibrations and noise generated by high-pressure pump systems can negatively impact the environment and equipment. Rubber expansion joints effectively absorb vibrations and reduce noise, improving the working environment and extending equipment life.
- Easy Installation: Rubber expansion joints are lightweight, making them easy to install and maintain. This is a significant advantage for pipeline systems requiring frequent maintenance.
Materials and Applicable Range
- Standard Type: Suitable for transporting media such as air, compressed air, water, seawater, oil, acids, and alkalis within the temperature range of -15℃ to 120℃.
- Special Type: Suitable for transporting media above -30℃ to 150℃, including oil, concentrated acids, alkalis, and solid materials.
Rubber expansion joint materials are polar rubber, offering excellent sealing performance and a long lifespan. However, they should be kept away from sharp metal objects to prevent puncturing the sphere.
Considerations for Selecting Rubber Expansion Joints for High-Pressure Pumps
- Choosing the Appropriate Pressure Rating: For high-pressure pump systems, the appropriate rubber expansion joint should be selected based on the pump’s operating pressure. Shanghai Songjiang Group’s rubber expansion joints have a maximum pressure of 2.5MPa. If the pump’s pressure exceeds this range, metal hoses should be considered.
- Choosing Limit Type Rubber Expansion Joints: In high-pressure environments, it is recommended to use limit-type rubber expansion joints. These joints are equipped with limit rods that can handle excessive displacement in the pipeline, preventing the rubber expansion joints from being pulled apart. This design effectively prevents system failure due to excessive displacement.
- Proper Installation Method: During installation, the bolts should be tightened using a diagonal method to ensure even force distribution and prevent leakage or damage. In high-pressure environments, it is advisable to use elastic supports to support suspended single-sphere rubber expansion joints, increasing system stability.
The Picture Of Songjiang Limit Type Rubber Expansion Joints with Control Rods
Conclusion
Shanghai Songjiang Group’s rubber expansion joints are an ideal choice for high-pressure pump systems due to their excellent pressure resistance, elasticity, and corrosion resistance. By selecting the appropriate model and type and installing them correctly, you can significantly enhance system reliability and lifespan. However，if the operating pressure of the high-pressure pump exceeds 2.5MPa, consider using metal hoses to ensure the system’s safe operation. Overall, choosing the right rubber expansion joint not only improves system performance but also reduces maintenance costs, ensuring long-term stable operation of the equipment.
