Views: 0 Author: Site Editor Publish Time: 2022-11-11 Origin: Site
INTRODUCTION
CHECK VALVES and GATE VALVES are two common types of valves in industrial fluid control, and each has its own advantages in terms of design standards, performance characteristics, and application scenarios. This article will help readers better choose the valve types that suit their needs by comparing and analyzing the design standards, performance characteristics, and applicable scenarios of the two types of valves.
I. COMPARISON OF DESIGN STANDARDS
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Design Standards | GB/T 12236, API 1594, BS 1868, DIN 3356 | GB/T 12234, API 600, BS 1444, DIN 3352 |
Pressure Ratings | GB/T 9124 | GB/T 9124 |
Face-to-Face Dimensions | GB/T 12221 | GB/T 12221 |
Flange Types | GB/T 9113, JB/T 79 | GB/T 9113, JB/T 79 |
Butt Welding Ends Connection | GB/T 12224 | GB/T 12224 |
II. PERFORMANCE CHARACTERISTICS COMPARISON
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Working Principle | Automatically open and close by utilizing the pressure difference generated by the flow of the medium to prevent the backflow of the medium. | Change the position of the valve plate through manual or electric operation to achieve full opening or full closing. |
Fluid Control | Operate automatically, reducing the need for external control, and are suitable for scenarios where preventing backflow is required. | Precisely control the flow and are suitable for scenarios where complete closing is needed. |
Response Time | Respond quickly and are suitable for scenarios where efficient flow control is required. | Have a relatively long response time but are suitable for scenarios where complete closing is required. |
Wear Condition | The sealing surfaces of the valve disc and the valve seat are continuously rubbed and are prone to wear. | The sealing surfaces are less affected by the erosion of the medium and have a longer service life. |
Applicable Media | Water, oil, steam, acidic media, etc. | Water distribution systems, oil and gas pipelines, steam systems, etc. |
III. APPLICATION SCENARIOS COMPARISON
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Typical Applications | Water treatment systems, HVAC systems, oil and gas industries. | Water distribution systems, oil and gas pipelines, steam systems. |
Installation Positions | The installation positions are relatively precise, usually located at higher positions of the pipeline to prevent the backflow of the medium. | The installation positions are relatively flexible and are suitable for various pipeline scenarios. |
Maintenance Requirements | Have a relatively high maintenance frequency and need to regularly check the wear conditions of the valve disc and the sealing surfaces. | Have a relatively low maintenance frequency but need to regularly check the wear conditions of the valve plate and the sealing surfaces. |
IV. SUMMARY
Both CHECK VALVES and GATE VALVES have their own advantages in terms of design standards, performance characteristics, and application scenarios. Check valves are suitable for scenarios where preventing the backflow of the medium is required. Their automatic operation and quick response characteristics make them perform excellently in fields such as water treatment and HVAC. Gate valves, on the other hand, are more suitable for scenarios where precise flow control or complete closing is needed. Their excellent sealing performance and long service life make them suitable for high-pressure environments such as oil and gas and steam systems.
