Features and Advantages of Fixed Ball Valves
I. Key Features
1. Double Block and Bleed (DBB): The valve employs spring-preloaded floating seats. In both the fully open and fully closed positions, the upstream and downstream seats block the fluid flow. Any media trapped in the valve body cavity can be discharged through a dedicated bleeder valve.The main Ball valve product names of China Ball valve Network include:Inner Thread Two-plate Ball Valve，Two-plate External Thread Ball Valve，Two-plate Inner-thread Drawing Down Ball Valve，Two-plate Inner-thread Full Diameter Ball Valve，Two-plate Inner Thread Square Ball Valve，Two-plate Inner Thread V-shape Ball Valve，Unitary Pneumatic High Temperature Ball Valve
2. Automatic Pressure Relief: If abnormal pressure buildup occurs within the valve cavity due to temperature increase of the medium, the valve seat mechanism enables automatic pressure relief without the need for an external safety valve. This ensures system safety, particularly when handling liquid media.Ball Valve Products
3. Fire-Safe Design: The valve is designed and manufactured in compliance with API 607 and API 6FA standards, providing reliable fire-safe performance.Ball Valve News
II. Core Advantages
1. Emergency Seal Injection (Greaser Fitting): The valve seats are equipped with grease injection ports. In the event of unexpected seal failure caused by debris or fire, a grease gun can be quickly connected to inject sealant into the seat area for emergency leak control.
2. Reliable Stem Sealing and Low Operating Torque:
Stem Sealing: A dual-sealing arrangement is used, combining a standard sealing gland with an "O"-ring on the gland follower, ensuring high reliability. The addition of graphite packing and sealant injection ports minimizes stem leakage following a fire.
Easy Operation: The stem incorporates sliding bearings and thrust bearings, significantly reducing the operating torque.
3. Full Bore or Reduced Bore Design: Available in either full bore (bore matches pipeline internal diameter, facilitating pigging) or reduced bore configurations based on requirements.
4. Extendable Stem: The valve stem can be extended as needed for installation or operational purposes. This is especially suitable for applications like city gas lines that require buried piping. Extension length can be customized per customer specifications.
5. Smooth Operation: The use of seat and stem bearing materials with low friction coefficients and good self-lubricating properties greatly reduces the valve's operating torque. This allows for smooth and easy valve operation even over extended periods without lubricant injection.
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