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Help CenterAPI 6D Pneumatic Trunnion Ball Valve, Full Port, Fire Safe Design per API 607
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As a leading manufacturer with over 8 years of specialized experience, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance API 6D Pneumatic Trunnion Ball Valve. Engineered for the most demanding industrial applications, this valve combines robust design with advanced safety features, including a certified fire-safe design per API 607. Our commitment to quality, backed by ISO9001 certification, ensures you receive a reliable and durable flow control solution that enhances operational safety and efficiency in your critical pipelines. We understand the importance of dependable performance in industries like oil & gas, petrochemical, and power generation, which is why we design our valves to exceed industry expectations.
This valve is specifically designed for high-pressure, high-integrity services where safety and reliability are non-negotiable. The trunnion-mounted ball design provides superior stability and reduces operating torque, making it ideal for large-diameter and high-pressure applications. The pneumatic actuation offers rapid, reliable, and automated on/off control, which is essential for modern process automation and remote operation. The full port (full bore) design ensures minimal pressure drop across the valve, maximizing flow capacity and efficiency, which is crucial for maintaining system throughput and reducing energy costs over the long term.
Key Technical Features & Advantages:
- API 6D & API 607 Compliant Design: Manufactured strictly in accordance with API 6D specifications for pipeline valves. The fire-safe design is tested and certified to API 607/ISO 10497 standards. In the event of a fire, the secondary metal seat provides a tight seal to prevent catastrophic fluid release, containing the hazard and protecting personnel and assets.
- Trunnion-Mounted Ball Construction: The ball is supported by trunnion bearings at the top and bottom, which prevents excessive seat load and minimizes operating torque. This design ensures smooth operation, extends seat life, and is particularly advantageous for larger valve sizes (typically 2" and above) and higher pressure classes.
- Full Port (Full Bore) Configuration: The internal diameter of the valve matches the internal diameter of the connecting pipeline. This eliminates flow restriction, reduces turbulence, prevents cavitation, and allows for easy pigging and cleaning of the pipeline, saving on maintenance time and costs.
- Robust Pneumatic Actuator Package: The valve is equipped with a double-acting or spring-return pneumatic actuator. These actuators provide fast, precise quarter-turn operation. Options include solenoid valves, limit switches, and positioners for integration into sophisticated control systems (DCS/SCADA).
- Dual Seal & Blowout-Proof Stem: Features primary (soft) and secondary (metal) seals for bubble-tight shutoff. The stem is designed with an anti-blowout feature, ensuring it remains securely in place even under high-pressure conditions, enhancing operational safety.
- Versatile Material Selection: Available in a range of materials to suit various media and environmental conditions. Common body materials include WCB carbon steel, CF8/CF8M stainless steel, and other alloys. Seat and seal materials like PTFE, reinforced PTFE, or metal can be selected based on temperature, pressure, and chemical compatibility requirements.
Technical Specifications Table:
| Parameter | Specification / Option |
| Design & Manufacturing Standard | API 6D, ASME B16.34 |
| Fire Safe Standard | API 607 4th Edition / ISO 10497 |
| Pressure Rating (ANSI Class) | Class 150, 300, 600, 900, 1500, 2500 |
| Size Range (NPS) | 2" to 48" (Custom sizes available) |
| End Connection | RF Flange, RTJ Flange, Butt Weld (BW) |
| Operating Temperature | Standard: -29°C to 200°C. Low-temp & high-temp designs available. |
| Pneumatic Actuator Air Supply | 40-120 psi (3-8 bar). Double-acting or Spring-Return. |
| Optional Accessories | Solenoid Valve, Limit Switches, Positioner, Air Filter Regulator, Manual Override |
Benefits for Your Operation:
- Enhanced Safety & Compliance: The API 607 fire-safe certification provides peace of mind and helps your facility comply with stringent international safety regulations, reducing insurance risks and liability.
- Reduced Total Cost of Ownership: The durable trunnion design and high-quality materials minimize wear, leading to less frequent maintenance, longer service intervals, and lower lifecycle costs compared to standard floating ball valves.
- Improved Process Efficiency: The full-port design and low-torque operation contribute to energy savings by reducing system pressure drop. The reliable pneumatic actuation enables faster cycle times and seamless integration into automated processes.
- Operational Flexibility: Suitable for a wide range of media including crude oil, natural gas, refined products, water, and certain chemicals. The robust construction handles high-pressure surges and varying temperatures effectively.
Shanghai Zhibang Valve has established a strong reputation for quality and reliability, exporting over $1 million worth of industrial valves annually to key markets across North America, Europe, Asia, and beyond. Our ISO9001-certified manufacturing processes ensure consistent quality control from raw material inspection to final testing. With major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we offer flexible and efficient logistics to get your order delivered on time. When you choose our API 6D Pneumatic Trunnion Ball Valve, you are not just buying a component; you are investing in a safer, more efficient, and more reliable pipeline system. Contact our technical sales team today to discuss your specific application requirements and receive a detailed quotation.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between a trunnion-mounted ball valve and a floating ball valve?
A: In a floating ball valve, the ball is not fixed and is pushed by line pressure against the seat to create a seal. In a trunnion-mounted design, the ball is fixed on a trunnion (stem and bearings), and the seats are spring-loaded and move against the ball. This makes trunnion valves better suited for higher pressures, larger sizes, and results in lower operating torque.
Q2: What does "Fire Safe per API 607" mean for this valve?
A: It means the valve has been designed and tested to maintain a seal during and after exposure to fire. After the soft primary seals (like PTFE) burn away, a secondary metal-to-metal seal engages to prevent major leakage, helping to contain the fire hazard. Certification involves rigorous testing of external leakage, internal leakage, and shell strength under fire conditions.
Q3: Can this valve be used for both on/off and throttling service?
A: While primarily designed for reliable on/off (block) service, the pneumatic actuator with a positioner can allow for some degree of modulating control. However, for continuous or precise throttling, other valve types like control valves are generally recommended to avoid premature seat wear.
Q4: What information do you need to provide a quotation?
A: To provide an accurate quote, we typically require: Valve size (NPS/DN), Pressure Class (e.g., Class 300), Body & Trim Material, End Connection Type, Actuator type (Double-Acting or Spring-Return) and required accessories, and any specific standards or certifications needed (e.g., NACE MR0175).
Q5: Do you offer customization for special applications?
A: Yes. We can customize various aspects including special materials (duplex, super duplex, Inconel), extended bonnets for cryogenic service, anti-static devices, lockable devices, and specific paint coatings. Please provide your detailed specifications for review.
Q6: What is the typical lead time for this product?
A: Lead time depends on the size, pressure class, material, and order quantity. Standard configurations typically have a shorter lead time, while customized or large-size valves may require more production time. Our sales team can provide an estimated delivery schedule upon receipt of your inquiry.
Q7: What kind of testing is performed before shipment?
A: Every valve undergoes rigorous testing, which may include shell test, seat leak test (both low-pressure and high-pressure), fire test (for certified valves), and actuator function test. Test reports (e.g., API 598) can be provided upon request.
Q8: How does the pneumatic actuator fail in case of air supply loss?
A: This depends on the actuator type. A double-acting actuator will remain in its last position if air is lost. A spring-return (fail-safe) actuator will automatically drive the valve to a predefined safe position (either fully open or fully closed) upon air failure, which is critical for safety-instrumented functions.
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