Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of globe valve rubber sealing rings in China, also supports customized service. Please feel free to buy high quality globe valve rubber sealing rings for sale here from our factory.
What are Globe Valve Rubber Sealing Rings
Globe valve rubber sealing rings are rubber sealing elements installed in the globe valve. Their main function is to form an effective seal when the valve is closed to prevent fluid leakage. A Globe valve is a common cut-off valve, used to open or close the flow of fluid. Its working principle is to control fluid passage through the up-and-down movement of the valve disc.
Main benefits
- Excellent sealing performance: Globe valve rubber sealing rings can provide a good sealing effect, especially in low-pressure and small-diameter stop valves, effectively preventing medium leakage.
- Strong adaptability: The rubber material has good elasticity and can adapt to minor unevenness between the valve disc and the valve seat, thereby maintaining a tight seal.
- Corrosion resistance: Depending on the type of rubber, such as nitrile rubber (NBR), fluorine rubber (Viton), etc., it can resist the erosion of a variety of chemical substances and is suitable for a variety of corrosive media.
- Economical: Rubber seals are generally less expensive than metal seals, providing a cost-effective sealing solution.
- Shock resistance: Rubber materials have certain shock-absorbing properties and can absorb shocks caused by changes in fluid pressure or equipment vibration.
- Compatibility: Rubber seals can be used with valve bodies and valve discs made of a variety of materials, including metals, plastics, and other synthetic materials.
Factors to consider when choosing Globe valve rubber sealing rings
1. Temperature conditions
The material of Globe valve rubber sealing rings needs to be able to withstand the temperature changes in the working environment. For example:
- Nitrile butadiene rubber (NBR) is typically suitable for temperatures ranging from -30°C to 110°C.
- Ethylene propylene rubber (EPDM) can be used in environments from -40°C to 150°C.
- Silicone rubber can withstand extremely low temperatures, such as -100°C, and high temperatures up to 200°C.
2. Media Characteristics
The rubber seal needs to be compatible with the media passing through the stop valve. Different rubber materials have different tolerances to different chemicals. For example:
- Nitrile rubber (NBR) has good oil and fuel resistance.
- Viton has excellent chemical and oil resistance and is suitable for highly corrosive media.
- Ethylene propylene rubber (EPDM) is suitable for use in environments that are resistant to water, vapor, and mild chemicals.
3. Pressure level
The rubber seal needs to be able to withstand the pressure when the shut-off valve is operating. Different rubber materials and hardness grades are suitable for different pressure ranges. For example:
- Lower-pressure applications may use lower durometer rubber seals.
- High-pressure applications may require harder rubber seals, possibly in conjunction with retaining rings.
4. Sealing form
The sealing form of the rubber sealing ring in the stop valve also affects its applicable working conditions. The main sealing forms include:
- End face static seal: suitable for sealing between the valve seat and the valve body.
- Reciprocating seal: suitable for sealing between the valve disc and the guide sleeve.
- Valve seat sealing: suitable for sealing between the valve disc and the valve seat.
Production Process
1. Material selection
Choosing the right rubber material is the first step in the production process. According to the working conditions of the stop valve, such as medium type, temperature, pressure, etc., select the appropriate rubber material, such as nitrile rubber (NBR), fluorine rubber (FKM), silicone rubber (Silicone), etc.
2. Formula design
The performance of Globe valve rubber sealing rings depends largely on their formulation. Manufacturers will adjust the proportions of rubber, fillers, curing agents, softeners and other additives based on different application needs to achieve the required physical and chemical properties.
3. Mixing
Compounding is the process of mixing rubber and various additives. This process is usually carried out in a rubber compounding machine, ensuring that all ingredients are evenly distributed to form a consistent mixture.
4. Forming
Molding is the process of shaping the mixed rubber material into the desired shape. This can be achieved through a variety of methods, such as compression molding, transfer molding, or injection molding. During the molding process, the rubber material is placed into the mold and solidified at a certain temperature and pressure.
5. Curing
Curing is the process by which a rubber material becomes an elastomer through a chemical reaction. This process is usually carried out under heated conditions, which can be achieved by hot air, steam, or infrared heating. Curing time and temperature need to be strictly controlled to ensure the best physical properties of the rubber material.
6. Post-processing
Cured rubber seals may require post-processing such as deburring, sanding, cleaning, and lubrication to ensure the seal has a smooth surface, accurate dimensions, and is ready for installation.
7. Inspection and testing
Each rubber sealing ring needs to undergo strict quality inspection and performance testing before leaving the factory. This includes dimensional inspection, hardness testing, tensile strength testing, temperature and chemical resistance testing, etc. to ensure the product meets specifications.
8. Packaging and storage
Inspected rubber seals are packaged appropriately to prevent damage during transportation and storage. Packaging materials need to be able to repel moisture, and dust, and protect the rubber from UV rays and other environmental factors.
The above is the production process steps of general globe valve rubber sealing rings. Different manufacturers and production processes may vary.
Standard O-ring size chart
Our LINDE can provide the size chart of standard O-rings. If you need to customize, please provide the corresponding drawing dimensions.
| Size | CS (IN) | ID (IN) | OD (IN) | CS (MM) | ID (MM) | OD (MM) |
|---|---|---|---|---|---|---|
| 001 | 0.040 | 0.029 | 0.109 | 1.02 | 0.74 | 2.78 |
| 002 | 0.050 | 0.042 | 0.142 | 1.27 | 1.07 | 3.61 |
| 003 | 0.060 | 0.056 | 0.176 | 1.52 | 1.42 | 4.46 |
| 004 | 0.070 | 0.070 | 0.210 | 1.78 | 1.78 | 5.34 |
| 005 | 0.070 | 0.101 | 0.241 | 1.78 | 2.57 | 6.13 |
| 006 | 0.070 | 5.239 | 5.379 | 1.78 | 133.07 | 136.63 |
| 007 | 0.103 | 0.081 | 0.287 | 2.62 | 2.06 | 7.30 |
| 008 | 0.103 | 0.112 | 0.318 | 2.62 | 2.84 | 8.08 |
| 009 | 0.139 | 0.171 | 0.449 | 3.53 | 4.34 | 11.40 |
| 010 | 0.139 | 0.234 | 0.512 | 3.53 | 5.94 | 13.00 |
| 011 | 0.210 | 0.412 | 0.832 | 5.33 | 10.46 | 21.12 |
| 012 | 0.210 | 0.537 | 0.957 | 5.33 | 13.64 | 24.30 |
| 013 | 0.210 | 0.662 | 1.082 | 5.33 | 16.81 | 27.47 |
| 014 | 0.275 | 1.350 | 1.900 | 6.99 | 34.29 | 48.26 |
| 015 | 0.275 | 1.600 | 2.150 | 6.99 | 40.64 | 54.61 |
If you would like more information about this product, please contact us.
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