BCST Trunnion Mounted Ball Valves: Engineered for Maximum Pressure Integrity
- API 6D Certified with full compliance to international standards
- Available in sizes from 2" to 48" (DN50-DN1200)
- Pressure classes from ASME Class 150 to 2500
- 100,000+ cycle life with documented field performance
- NACE MR0175 compliant options for sour gas service
- Temperature range from -196°C to 425°C
98.7%
Field Reliability Rate
30%
Lower Torque Requirement
Types of Trunnion Mounted Ball Valves
When specifying Trunnion Mounted Ball Valves, trust is paramount. Every BCST valve is built to exceed industry standards in our ISO 9001 certified factory. We hold crucial certifications including API 609, API 607 Fire Safe, and CE, guaranteeing our products are suitable for the most demanding services in oil & gas, chemical processing, and power generation. This commitment to certified quality is a core advantage of partnering with BCST.
The BCST Factory Advantage: Advanced Trunnion Mounted Ball Valves
BCST trunnion mounted ball valves feature a patented seat design that reduces wear by 60% compared to conventional designs while distributing load through fixed trunnion shafts.
No limitation of the size
The trunnion mounted ball valve is present in some sizes. If you have large applications, then two and three-piece trunnion mounted ball valves can house balls of considerable size. The trunnion mounted ball valve with the single unit is for applications with low pressure. Trunnion mounted ball valve is also appropriate for managing the applications working on high-pressure.
Возможность двойного блока и кровотечения:
One of the prominent benefits of using a trunnion mounted ball valve is double block and bleed. You can use many trunnions mounted ball valves for making the double block and bleed valve. There is also a possibility of adding the bleed body inside the trunnion mounted ball valve to bring improvement in sealing capability. The double block and bleed get the opportunity of flushing the trunnion mounted ball valve under pressure conditions and keep checking the sealing of the seats are correct.
Возможность настройки
There are value-adding features in the trunnion mounted ball valve. You can strengthen seats and balls with the help of injections to seal them tightly. There is also a possibility of making bolts and bearings resistant to corrosion to increase the lifespan of the trunnion mounted ball valve. The larger size of the trunnion mounted ball valve is available with the lifting of the lugs.
Сиденья загружаются с помощью пружины:
In the trunnion mounted ball valve, the pressure from the onstream direction helps activate seat loading with the spring. So, it proceeds towards the ball that is in a particular location by the trunnion. It helps tighten the sealing and create the trunnion mounted ball valve effective in low and pressure circumstances.
Технические характеристики и выбор
Исчерпывающие технические данные и интерактивные инструменты помогут вам выбрать идеальный клапан для вашего применения.
| Decision Criteria | Key Considerations | Recommended Configuration |
|---|---|---|
| Рабочее давление | ≥ 250 psi requires trunnion design for stability and proper sealing | Class 150 - 2500 |
| Диапазон температур | Extreme temperatures require special materials and design considerations | Cryogenic: Extended bonnet High temp: Special alloys |
| Совместимость с носителями | Chemical resistance and material compatibility with process media | Corrosive media: Stainless steel or alloy Abrasive media: Hardened trim |
| Требования к обслуживанию | Accessibility and frequency of maintenance operations | High maintenance: Bolted bonnet Low maintenance: Welded or threaded connections |
| Характеристики потока | Required flow control precision and pressure drop considerations | Precision control: Globe valve Full flow with minimal drop: Gate valve |
| Тип приложения | Specific industry requirements and operational conditions | Oil & Gas: API 6D valves Water treatment: Resilient seated valves |
| Shutoff Requirements | Leakage tolerance and sealing requirements | Bubble-tight shutoff: Soft seated valves Fire-safe: Metal seated with secondary seal |
| Метод приведения в действие | Power availability, control requirements, and emergency operations | Remote operation: Motorized actuators Emergency shutdown: Spring-return actuators |
Отраслевые применения
Our Trunnion Mounted Ball Valve excel across demanding industrial sectors, providing reliable performance in the most challenging environments.
Производство электроэнергии
The trunnion mounted ball valve are useful in compressors, generators, and turbines to allow the integration and working of the power industries.
Нефтегазовая промышленность
Trunnion mounted ball valve helps in gas feeding lines, the field of the gas plants, processing the plants for industrial gases, oil refineries, and plants for the crude oil.
Химическая обработка
Trunnion mounted ball valve is most suitable for the chemical industries as it provides durability, extra-ordinary sealing, and safety.
Pipeline industries
The trunnion mounted ball valve can manage various applications, including liquids, gases, and slurries. It makes the trunnion mounted ball valve more suitable for the pipelining industry.
Hydrocarbon industries
The purpose of using trunnion mounted ball valves is to facilitate hydrocarbon processing. It is the reason for the popularity of trunnion mounted ball valve in the chemical industries.
Преимущество фабрики BCST
Являясь прямым производителем, BCST контролирует весь производственный процесс, что дает нам значительные преимущества в качестве, сроках поставки и ценах. Наш завод, сертифицированный по стандарту ISO 9001, гарантирует соответствие каждого клапана самым высоким стандартам.
- Прямые заводские цены
- Сертифицировано по ISO 9001
- Одобрено API 609/607
- Команда инженеров-экспертов
56
Международные бренды
1000+
Удовлетворенные клиенты
99.9%
Показатель качества
BCST Valve Quality Control For Trunnion Mounted Ball Valve
Дизайн
- Техническое программное обеспечение
- Заседание технической группы
- Подтверждение чертежей CAD
Сборка
- Установка
- Калибровка
Контроль сырья
- Химический анализ
- Механическая недвижимость
- размерные чеки
- Визуальные проверки
- Экспертиза на предмет неразрушения
Гидростатическое испытание
- Испытание оболочки
- Испытание на герметичность
- Испытание на утечку
- Испытание воздухом
- Функциональный тест
Обработка
- Обработка на станках с ЧПУ
- Визуальные проверки
- Проверки размеров
- Жидкий тест на проникновение
Перспективы лечения
- Полировка поверхности
- Живопись
- Визуальный осмотр
- Проверка толщины
Тест части Спарт
- Визуальные проверки
- Проникновение жидкости
- Тест
- Испытание на твердость
- Притирка
- Проверки размеров
Упаковка
- Маркировка
- Экспортируемый деревянный ящик
Получите последний каталог прямо сейчас!
Как работает шаровой кран с цапфой?
The trunnion mounted ball valve is the quarterly turning of the valves. It shows that you require turning the actuator at 90 degrees angle to turn the trunnion mounted ball valve on or off. After turning the actuator, the ball starts moving, and bores are in the direction of the pipeline. The medium begins flowing easily. One more turning of the handle starts moving the ball so the facing of the bore is not towards the pipeline and the medium stops flowing. For instance, you need the regulation of the oil by the very critical processing units. So, here is the requirement regarding installing the trunnion mounted ball valve.
To begin the flow, keep moving the actuator toward the trunnion mounted ball valve towards the 90-degree angle. The connection of the actuator is with the stem of the trunnion mounted ball valve, whose connection is with the ball. When the rotation of the stem starts, there is also the ball’s movement. Here is the bore facing the pipeline. Therefore, this is the half-bore trunnion mounted ball valve, and there is a restriction of the flowing oil. The pressure is also low where the stream is also flowing. To stop the flowing medium, it is necessary to rotate the actuator along the stem and ball. Now, the bore of the ball is away from the pipeline. The pressure from the upstream pushes the seats near the ball for tight sealing. There is spring-loaded trunnion mounted ball valves; even the lower pressure keeps moving away from the ball. The tight sealing causes the oil flow to stop and avoid flow flowing in the internal parts of the trunnion mounted ball valve. In those applications where the pressure is high, the trunnion mounted ball valve sustains the torque as the additional pressure on the ball and seats. The trunnion absorbs its mounted ball valve. When the pressure is low in the applications, seats of the spring load of the trunnion mounted ball valve is near the ball for firm sealing formation.
Каковы рекомендации по обслуживанию шарового крана с цапфой?
Сайт шаровой кран с цапфой doesn’t need proper maintenance. Below are the tips to increase the lifetime of the шаровой кран с цапфой:
- Продолжайте переключать шаровой кран с цапфой от полностью закрытого до полностью открытого дважды или трижды за время работы более длительного периода. Впоследствии возвращаясь в исходное положение. Делать это нужно один раз в год.
- Обслуживание шаровой кран с цапфой в соответствии с требованиями. При необходимости замените приводное устройство и извлеките его из корпуса шаровой кран с цапфой. It is not essential for disassembling the whole шаровой кран с цапфой.
- Не следует использовать шток или приводное устройство для подъема шаровой кран с цапфой
- При наличии загрязнений в трубопроводах, отходящих от дренажа шарового крана с цапфой. Затем продолжайте сливать воду из шаровой кран с цапфой чтобы не замерзнуть в зимнее время года.
- Для предотвращения переноса грязи и остатков веществ вниз по течению установите продувку в центре линии. шаровой кран с цапфой. Он подходит для удаления всех загрязнений и нечистот.
- Если нет установки продувки от линии, необходимо открыть половину шаровой кран с цапфой for discharge purposes. The pipeline needs to be under maintenance, and there shouldn’t be any pressure during the opening of the шаровой кран с цапфой и разгрузки клапана.
- Продолжайте впрыскивать смазку на уплотнение внутри штока шаровой кран с цапфой для предотвращения штабелирования
- Всегда очищайте все детали шаровой кран с цапфой Он должен получить заверения в том, что работа шаровой кран с цапфой. Он относится к зоне сборки или разборки при обслуживании деталей. шаровой кран с цапфой
- Во время технического обслуживания шаровой кран с цапфовым креплением открытие перепускного клапана и дренажной пробки необходимо для сброса давления из центра камеры
- После каждой процедуры посмотрите на части шаровой кран с цапфой против коррозии и износа. В основном используется для уплотнительных поверхностей, сальников, уплотнительных колец, седел или корпуса шарового крана с цапфой.. Измените часть шаровой кран с цапфой если это необходимо.
- Смазка очень важна для организма шаровой кран с цапфой и его движущихся частей каждый год.
- При обслуживании в масле или воде рекомендуется проводить осмотр каждые три месяца. При высоком уровне коррозии требуется ежемесячное обслуживание.
- Если приводное устройство находится в шаровой кран с цапфой, Затем выполните все работы по уходу в соответствии с инструкциями производителя.
- Никогда не используйте шаровой кран с цапфой as the ladder when you are taking any equipment above it. Also, not hanging of extra weight on the stem, drive or any other accessories of the trunnion mounted ball valve
В чем разница между плавающим шаровым краном и шаровым краном с цапфой?
The main difference between the floating ball valve and the trunnion mounted ball valve is the ball’s construction and assembling of the parts in the valve’s body. The trunnion ball is fixed and placed in the middle of the valve’s body. It is the valve’s stem by the top of the shaft, and the bottom of the shaft is the trunnion. The attachment of the floating ball valve is with the valve’s stem. It results in the floating ball “floating” on the valve’s seat. In the trunnion design, the insertion of the ball is in the centre of the bottom shaft that is known as the trunnion. The fixing of the ball is between the trunnion and stem. The purpose of trunnion is to fix and keep the ball in the centre position. The pressure level starts pressing the seats across the ball to tighten. While working on the trunnion mounted ball valve, the ball doesn’t need rotation against the pressure and seats of the valve. The ball needs rotation, contradictory to the pressure from the seats. The requirement of the torque is low than the floating ball valve. The trunnion mounted ball valve is the most appropriate choice for applications with high pressure. One more advantage of using a trunnion mounted ball valve is its availability with the drain or bleed connectivity. It helps the trunnion mounted ball valve to work as multiple safety devices. Moreover, you can also use the trunnion mounted ball valve as the relief valve. It happens when the spring on the seat starts relieving automatically for draining the additional pressure back inside the mainlining.
Какие проблемы возникают при поиске и устранении неисправностей в шаровом кране с цапфой?
| Устранение неполадок | Причина | Решение |
|---|---|---|
| Приводное устройство и шток не могут вращаться | Defect in the gear and bearing; Low frequency in the working; Less lubricating oil; Immobile gear or trunnion mounted ball valve; Extreme tight packing; The rough surface of the stem; Dirt accumulating on the trimming of the stem; Bending or damaging of the stem | Check the trunnion mounted ball valve in the disassembly section for accessing the bearing and checking the damage; Replacement of the parts if it is essential; Remove the cover of the gear and keep checking the damage; Heat up or start injecting the anti-freezing solution into the gear; Lose the stud that has the gland flange; Clean out the whole stem and start adding the lubricant; Replacing or repairing the stem of trunnion mounted ball valve |
| Протечки на поверхности уплотнения | Loosing of the studs and nuts; Damaging of the sealing surface; Clogging of the sealing surface along with the dirt; The incorrect placing of the switch | Tight all the studs and nuts; Torque if it is necessary according to the valves of the torque; Replacement of the sealing materials from where is the leakage (O-rings, seals, and gaskets); While disassembling, check the trunnion mounted ball valve again to reach the sealing surface and flush out all the dirt; Fix the switch in the correct position |
| Негерметичность упаковки | Uncompressing the packing; Missing or damaging of the packing; Deformation of the stem; Uneven roundness of the stem; Scratches present | Again, compress the packing properly; Change the packing and stem; Include more packing to adjust the suitable quantity |
| Повреждение центрального фланца | Damage gasket; The rough and patchy sealing surface of the flange | Change the gasket as soon as possible; Smooth the whole sealing surface of the flange |
| No properly closing of the trunnion mounted ball valve | Incorrect installation of the limit switch of the gear; Unsuitable installation of the driving device | Install the limit switch again; Reinstallation of the driving device in its correct position |
| There is no proper way for the medium to flow in the trunnion mounted ball valve | No alignment of the opening of the ball along the passage of the flow | Adjustment of the ball is essential in the proper location; Must check the connection of the trunnion mounted ball valve’s stem with the ball slot. |
Your Quick Maintenance Checklist
- Не следует использовать шток или приводное устройство для подъема шаровой кран с цапфой. Doing so can cause permanent damage to the valve mechanism and create safety hazards.
- Если нет установки продувки от линии, необходимо открыть половину шаровой кран с цапфой for discharge purposes. The pipeline needs to be under maintenance, and there shouldn't be any pressure during the opening of the шаровой кран с цапфой и разгрузки клапана.
- Во время технического обслуживания шаровой кран с цапфой, the opening of the relief valve and drainage plug is essential for releasing the pressure from the centre of the chamber
- При обслуживании в масле или воде рекомендуется проводить осмотр каждые три месяца. При высоком уровне коррозии требуется ежемесячное обслуживание.
- Никогда не используйте шаровой кран с цапфой как лестница, когда вы поднимаете на нее какое-либо оборудование. Кроме того, не вешайте лишний вес на шток, привод или любые другие аксессуары шаровой кран с цапфой.
Часто задаваемые вопросы
What's the key difference between trunnion mounted and floating ball valves?
Trunnion mounted valves use fixed shafts to support the ball (ideal for high-pressure applications), while floating valves rely on seat contact for ball positioning. This fundamental design difference makes trunnion valves essential for pipelines above 250 psi, where floating valves would experience excessive seat loading and premature wear. BCST’s trunnion design reduces seat loading by 60% compared to conventional trunnion valves, extending service life significantly. Field data shows BCST valves achieve 100,000+ operational cycles before requiring maintenance, versus 30,000-40,000 cycles for standard industry offerings.
Why is the trunnion mounted segment growing faster than general ball valve markets?
The 7.3% CAGR for trunnion mounted valves (compared to 5.2% for general ball valves) reflects increasing demand in deepwater drilling, high-pressure transmission systems, and LNG facilities where standard valves fail. As global energy infrastructure ages and new projects push technical boundaries, the reliability advantages of trunnion designs become increasingly valuable. BCST’s market share has grown to 18.7% in 2024 due to our focus on these high-growth applications. The 2-piece trunnion mounted segment alone is projected to grow from USD 1.25 billion (2024) to USD 1.85 billion by 2033, reflecting industry recognition of these operational advantages.
Can BCST trunnion valves handle sour gas service with H₂S?
Yes – our NACE MR0175 compliant models with specialized trim materials serve H₂S environments across oilfield applications. BCST offers 128 specific material combinations certified for sour service, including Alloy 20 bodies with Stellite-coated trim and special seat materials. Our valves are currently specified in 87% of new sour gas field developments worldwide, with documented performance in environments containing up to 20% H₂S. Every sour service valve undergoes rigorous testing per NACE TM0177 and TM0284 standards to ensure reliability in the most challenging conditions.
What maintenance advantages do BCST trunnion valves offer over competitors?
Our 3-piece maintenance-friendly and top-entry designs allow complete internal repair without valve removal – reducing downtime by up to 70% in critical processes. BCST valves require 30-40% less torque during operation, extending actuator life, and our proprietary seat design reduces wear by 60% compared to conventional trunnion valves. Field data shows BCST valves achieve 100,000+ operational cycles before requiring maintenance, versus 30,000-40,000 cycles for standard industry offerings. For offshore applications, our top-entry valves enable maintenance without pipeline isolation – a critical advantage where downtime costs can exceed $1 million per day.
How does BCST ensure quality in extreme temperature environments?
Every BCST valve undergoes rigorous application-specific testing: cryogenic models are tested at -196°C, high-temperature versions at 425°C, and all valves receive API 598 hydrostatic testing at 1.5x working pressure. Our quality assurance process includes material traceability from mill certificate through final assembly, with 100% of valves receiving dimensional verification and functional testing. This comprehensive approach ensures 98.7% field reliability across extreme temperature applications. For cryogenic service, we implement special stem packing designs and extended bonnets to maintain sealing integrity during thermal cycling, with documented performance in LNG facilities worldwide.
What makes BCST valves suitable for offshore applications?
BCST’s offshore-optimized trunnion valves feature corrosion-resistant materials (duplex stainless steel, super duplex), compact designs for space-constrained platforms, and fire-safe construction per API 607/6FA standards. Our top-entry models allow maintenance without valve removal – critical for offshore environments where downtime is extremely costly. With 42% of offshore platform installations using BCST valves, our reliability record shows 99.4% operational availability in harsh marine environments. Additional features include anti-galling coatings for saltwater exposure, special stem seals for vibration resistance, and compact designs that maximize space utilization on crowded platforms.
How do I determine the right size trunnion valve for my pipeline?
Determining the right trunnion valve size requires evaluating four key factors: pipeline diameter, flow requirements, pressure drop limitations, and installation constraints. For most applications, the valve size should match the pipeline diameter (e.g., 8″ pipeline requires 8″ valve). However, for high-flow applications, you may need a larger valve size to minimize pressure drop – BCST’s full port design maintains 95-98% of theoretical pipe flow. Our engineering team can perform a detailed flow analysis using your specific operating parameters to recommend the optimal valve size. For critical applications, we recommend consulting API 6D guidelines and performing a formal valve sizing calculation considering your specific fluid properties and operating conditions.
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