Views: 0 Author: J-VALVES Publish Time: 2020-02-12 Origin: Site
In the industrial field, the emergency shutdown system is one of the key links to ensure safety. The TRUNNION BALL VALVE API 6D relief device and the GATE VALVE quick closing design are two common emergency shutdown solutions. This article will compare these two designs from multiple dimensions to help you better choose a suitable emergency shutdown system.
I. OVERVIEW
Trunnion Ball Valve API 6D Relief Device
The TRUNNION BALL VALVE is a high-performance ball valve. Its design complies with the API 6D standard and is widely used in emergency shutdown systems in industries such as petroleum and natural gas. Its core feature is that the ball is fixed by trunnions to achieve stable sealing and rapid opening and closing operations. The API 6D standard ensures the reliability and safety of the valve under harsh working conditions such as high pressure and high flow.
Gate Valve Quick Closing Design
The GATE VALVE is a traditional type of valve that controls the on-off of fluid by the up-and-down movement of the gate. The quickly closing gate valve is specially designed to be able to close within a short time and is suitable for occasions where quick shut-off is required.
II. COMPARISON OF TECHNICAL PARAMETERS
Parameters/Characteristics | Trunnion Ball Valve API 6D Relief Device | Gate Valve Quick Closing Design |
Operation Method | 90-degree rotation operation, quick opening and closing | Multiple rotations operation, longer closing time |
Sealing Performance | Double Block and Bleed (DBB), excellent sealing performance | Unidirectional sealing, there may be slight leakage when closed |
Pressure Range | For high-pressure applications, up to 15,000 psi | Suitable for medium and high pressure, but its performance under high pressure is not as good as that of the ball valve |
Flow Control | Full-bore design, low pressure drop | Large-sized gate valves have a large flow, but the resistance increases when half-open |
Maintenance Requirements | Regular inspection of seals and lubrication | Regular inspection of the gate and valve seat is required, and maintenance is complicated |
Applicable Media | Multiple media such as gases and liquids | Suitable for slurry, viscous liquids, etc |
Cost | Higher initial investment, but long service life | Low initial cost, but may need to be replaced frequently |
III. COMPARISON OF APPLICATION SCENARIOS
Trunnion Ball Valve API 6D Relief Device
• Petroleum and Natural Gas Pipelines: When transporting natural gas or petroleum at high pressure, the quick opening and closing and high sealing performance of the trunnion ball valve can effectively prevent leakage.
• Chemical Industry: When dealing with corrosive or flammable media, its Double Block and Bleed function can ensure safety.
Gate Valve Quick Closing Design
• Large Water Treatment Plants: Used to control the flow of large amounts of water, and the quick closing function can prevent water hammer.
• Mining Industry: When dealing with viscous media such as slurry, the bidirectional flow design of the gate valve has more advantages.
IV. SUMMARY OF ADVANTAGES AND DISADVANTAGES
Trunnion Ball Valve API 6D Relief Device
• Advantages: Quick opening and closing, excellent sealing performance, suitable for high-pressure environments.
• Disadvantages: Higher initial cost, high requirements for installation accuracy.
Gate Valve Quick Closing Design
• Advantages: Low cost, suitable for large-sized pipelines.
• Disadvantages: Longer closing time, sealing performance not as good as that of the ball valve.
V. CONCLUSION
When choosing an emergency shutdown system, it is necessary to comprehensively consider the application scenarios, cost budget, and maintenance capabilities. If quick opening and closing and high sealing performance are required, the TRUNNION BALL VALVE API 6D relief device is the ideal choice. If the budget is limited and the medium is relatively viscous, the GATE VALVE quick closing design is more cost-effective. Through the above comparison, it is hoped that it can help you make a wiser decision.
