Views: 0 Author: J-VALVES Publish Time: 2020-02-13 Origin: Site
In industrial piping systems, CHECK VALVES and BUTTERFLY VALVES are two common types of valves, which play important roles in fluid control. However, due to the differences in their structures and functions, choosing the appropriate valve type requires comprehensive consideration of factors such as pressure, temperature and material. This article will compare the key points for selecting check valves and butterfly valves in tabular form to help readers better understand how to make selections according to specific requirements.
Selection Factors | ||
Pressure Ratings | Applicable to low-pressure systems, usually not exceeding PN40, but some high-performance models can support higher pressures (such as PN160). | Applicable to low-pressure systems, generally not exceeding PN40, but can support higher pressures (such as 300 PSI) under specific circumstances. |
Temperature Range | Depending on the material, it can adapt to a temperature range from -29°C to 425°C. | Generally applicable to environments with a temperature ≤ 80°C, but some special designs can work under conditions up to 300°C. |
Material Selection | Commonly used materials include stainless steel, cast iron, copper alloys, etc. Corrosion-resistant or high-temperature-resistant materials can be selected according to the characteristics of the medium. | Commonly used materials include carbon steel, stainless steel, cast iron, etc. Seals can be made of EPDM, fluoroelastomer, etc. |
Flow Characteristics | The flow characteristics are approximately linear, suitable for occasions where precise flow control is required. | The flow characteristics are approximately linear, suitable for large-diameter pipelines and flow regulation requirements. |
Installation Space | Compact in structure, suitable for installation environments with limited space. | Short in face-to-face dimension, suitable for large-diameter or space-constrained pipelines. |
Applicable Media | Applicable to clean media such as clear water, gas, steam, etc., not suitable for media containing solid particles or with high viscosity. | Applicable to media such as water, oil products, compressed air, etc., but not suitable for high-temperature and high-pressure environments. |
Sealing Performance | The materials of the sealing surfaces are diverse, such as rubber, metal, etc. Appropriate sealing forms need to be selected according to the working conditions. | The materials of the sealing surfaces include soft seals (such as EPDM) and hard seals (such as metal), suitable for different working conditions. |
Economy | Relatively low in cost, especially suitable for small pipelines. | Higher in cost, but suitable for large-diameter pipelines and special working conditions. |
CHARACTERISTICS AND APPLICABLE SCENARIOS OF CHECK VALVES:
1. CHECK VALVES are mainly used to prevent the backflow of media and are applicable to clean media such as clear water, gas and steam.
2. They are compact in structure and suitable for installation environments with limited space.
3. Depending on the differences in pressure ratings and temperature ranges, check valves can be divided into various types such as swing check valves, lift check valves and butterfly check valves.
CHARACTERISTICS AND APPLICABLE SCENARIOS OF BUTTERFLY VALVES:
1. BUTTERFLY VALVES are applicable to flow regulation and large-diameter pipelines. They are short in face-to-face dimension and convenient to install.
2. Due to the limitations of their sealing material, butterfly valves are usually not suitable for high-temperature and high-pressure environments.
3. In occasions where quick opening and closing are required, butterfly valves are favored for their simple operation.
SUMMARY:
Both CHECK VALVES and BUTTERFLY VALVES have their own advantages and disadvantages. When selecting valves, comprehensive consideration should be given to factors such as pressure, temperature, material and application scenarios according to specific working conditions. For example, in pipeline systems with low pressure and clean media, check valves are a more economical choice; while in occasions where large-diameter flow regulation is required, butterfly valves are more appropriate.
