Rubber seal material selection: How to make the best choice based on temperature and pressure requirements?

introduction

As a key sealing material, rubber sealing ring is widely used in all kinds of equipment and machinery, and the choice of its material directly affects the sealing effect and service life. In the face of different working environments, especially in the case of large changes in temperature and pressure, it is particularly important to choose the right rubber seal material.

Effect of temperature on rubber sealing ring material

The performance of rubber seals varies under high or low temperature conditions, so the operating temperature range needs to be considered when selecting materials.

High temperature environment

Requirements: In high temperature environments, rubber seals need to have good heat resistance and anti-aging ability to keep the sealing effect stable.

Recommended materials: Polytetrafluoroethylene (PTFE), silicone rubber (VMQ) and fluorine rubber (FKM) are commonly used high temperature sealing ring materials. PTFE has excellent high temperature resistance, VMQ and FKM also perform well at high temperatures.

Low temperature environment

Requirements: At low temperatures, rubber seals need to maintain good elasticity and tightness to prevent hardening or embrittlement of the material.

Recommended materials: Nitrile butadiene rubber (NBR) and fluorine rubber (FKM) are more suitable for low temperature environment choices, they can maintain good elasticity and sealing properties at low temperatures.

Effect of pressure on rubber seal material

In addition to temperature, working pressure is also an important factor to consider when selecting rubber seal materials.

Low pressure environment

Demand: In low-pressure environments, the sealing ring needs to have good elasticity and tightness, but the requirements for material strength and hardness are low.

Recommended materials: NBR, acrylic rubber (ACM) and fluororubber (FKM) are suitable for low pressure environments, they have good elasticity and sealing properties.

High pressure environment

Requirements: In high pressure environments, the sealing ring needs to have high strength and pressure resistance to ensure a stable sealing effect.

Recommended materials: FKM and nitrile butadiene rubber (NBR) are common choices in high-pressure environments, where they can withstand high pressures and maintain good sealing properties.

Conclusion

The correct selection of rubber sealing materials can significantly improve the sealing effect and service life of the equipment, and avoid leakage or performance degradation caused by improper materials. In the selection, according to the temperature and pressure requirements of the working environment, the reasonable selection of rubber sealing materials with corresponding characteristics is a key step to ensure the stable and safe operation of the equipment.