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Help CenterPneumatic Trunnion Ball Valve for API 6D Piping, Low Torque Operation, Extended Stem for Insulation
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As a professional valve manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our high-performance Pneumatic Trunnion Ball Valve designed for API 6D piping systems. Since our establishment in 2016, we have dedicated ourselves to engineering robust flow control solutions that meet the stringent demands of global industrial markets. This valve is engineered to deliver exceptional reliability and ease of operation in critical applications, combining the proven trunnion-mounted design with a pneumatic actuator for automated, low-torque performance. Its extended stem is specifically tailored for insulated pipelines, ensuring optimal functionality even in demanding thermal environments. We understand that efficiency and durability are paramount for your operations, which is why this valve is built to provide long service life with minimal maintenance.
This valve stands out due to its meticulous design and construction. The trunnion-mounted ball design is a key feature that sets it apart from floating ball valves. This configuration provides superior stability and reduces operating torque significantly, which is crucial for larger valve sizes and higher pressure classes. The low torque requirement translates directly into cost savings for our clients, as it allows for the use of smaller, more economical pneumatic actuators without compromising on performance or safety. The extended stem is another critical design element, providing the necessary clearance for applying thick insulation layers around the valve body and bonnet. This is essential for process lines requiring temperature maintenance or cryogenic service, preventing heat loss or gain and protecting personnel from high surface temperatures.
Key Technical Specifications and Advantages:
- Robust Trunnion Design: Features upper and lower trunnions that support the ball, minimizing seat load and wear. This design ensures tight sealing even after prolonged cycles and under high differential pressure.
- Pneumatic Actuation for Automation: Equipped with a double-acting or spring-return pneumatic actuator, enabling remote operation and integration into automated control systems (DCS/SCADA). Actuators are available with accessories like limit switches, solenoid valves, and positioners.
- Fire-Safe Design (Optional): Can be configured with fire-safe seats and seals that meet API 607/API 6FA standards, providing an extra layer of safety in hazardous environments.
- Anti-Static and Blowout-Proof Stem: The stem is designed to prevent static electricity buildup and is securely retained to avoid ejection under pressure, enhancing operational safety.
- Versatile Material Options: The valve body can be constructed from materials like WCB, LCB, CF8, CF8M, and other alloys to suit specific media (water, oil, gas, chemicals) and corrosion requirements. Seats are typically PTFE or reinforced polymers for reliable sealing.
- Easy Maintenance: The top-entry or side-entry design allows for in-line maintenance. Seat and seal rings can often be replaced without removing the valve from the pipeline, drastically reducing downtime.
The benefits for your operation are substantial. The low torque operation reduces energy consumption for the actuator and decreases wear on valve components. Compliance with API 6D ensures the valve meets international standards for pipeline valves in terms of design, materials, testing, and documentation. This is critical for projects in oil & gas, petrochemical, and power generation sectors. The extended stem design solves a common practical issue in insulated systems, eliminating the need for custom solutions or compromised insulation coverage.
| Parameter | Specification / Option |
|---|---|
| Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Rating | Class 150, 300, 600, 900, 1500 (PN16 to PN250) |
| Temperature Range | -29°C to +200°C (standard); Cryogenic (-196°C) options available |
| End Connection | RF, RTJ, BW; ASME B16.5 / B16.47 |
| Seat & Seal Material | PTFE, RPTFE, PEEK, Metal Seated |
| Actuator Air Supply | 4-7 bar (standard); Other pressures customizable |
| Valve Operation | Quarter-turn (90°), Fail-Safe Open/Close options |
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang Valve has established a strong reputation for quality and reliability across diverse markets including North America, South America, Europe, Southeast Asia, Africa, and the Middle East. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics. This particular Pneumatic Trunnion Ball Valve embodies our commitment to delivering engineered solutions that address real-world challenges like high torque and insulation requirements. It is not just a component; it is a critical investment in the safety, efficiency, and automation of your piping system. We encourage you to contact us with your specific pressure, size, and material requirements to receive a tailored quotation and technical support from our engineering team.
Frequently Asked Questions (FAQ):
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What is the main advantage of a trunnion-mounted ball valve over a floating ball design?
The trunnion design supports the ball on fixed shafts (trunnions), which drastically reduces the operating torque, especially for larger sizes and higher pressures. It also creates less friction on the seats, leading to longer service life and more reliable sealing. -
Can this valve be used for both on/off and control applications?
Primarily designed for on/off service, it can be used for basic throttling when equipped with a precise positioner on the pneumatic actuator. For precise flow control, a characterized ball or V-port ball valve is recommended. -
How does the extended stem benefit an insulated pipeline?
The extended stem provides the physical space needed to apply standard or thick insulation jackets over the valve bonnet area without interfering with the actuator mounting or handwheel. This ensures uniform insulation and maintains process temperature. -
What certifications are provided with the valve?
As a manufacturer with ISO9001 certification, we provide a standard material test report (MTR) and a factory acceptance test report. Specific certifications like API 6D monogramming, NACE MR0175, or CE marking are available upon request. -
Is the pneumatic actuator included, and what are the options?
The valve can be supplied as a complete package with a pneumatic actuator. Options include double-acting or spring-return (fail-safe) models, different torque outputs, and accessories like limit switches, solenoid valves, and air filter regulators. -
What is the typical lead time for an order?
Lead times vary based on size, material, and quantity. Standard configurations typically have a shorter lead time, while customized valves (special materials, high pressure, etc.) may require additional engineering and manufacturing time. Please inquire for a specific schedule. -
Do you offer manual operation as a backup?
Yes, a manual handwheel or gearbox can be mounted on top of or alongside the pneumatic actuator as a backup or for manual override, providing operational flexibility. -
How do you ensure the valve's performance in low-temperature applications?
For cryogenic service, we use specially treated materials (e.g., low-temperature carbon steel), extended stems to keep seals at ambient temperature, and deep-cooling processes to prevent cold embrittlement. Special testing per BS 6364 can be conducted.
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