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    With 50years history, Yongyuan works as a reliable API 6D 3 PIECE Trunnion Ball Valve provider from China. The API 6D 3 PIECE trunnion ball valve complies with API 6D, ASME 16.34, API 608 and other relevant ASTM specifications. Valve body and adapter material is forged steel A105, fire safe graphite rings is used to protect against external leakage. Every valve is manufactured to comply with NACE standards. It’s suitable for pipeline where zero leakage positive shutoff is critical.
  • Oilfield Threaded Ball Valve

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    Yongyuan works as a China based OEM manufacturer for oilfield threaded ball valve. By utilizing our expertise in design and manufacturing, we provide NPT ball valves for oil and gas industry. All these valves conform to NACE MR0175 requirements. They’re full opening to ensure a low pressure drop. Body materials are available in cast iron and cast steel. NPT threaded ends are on both sides.
  • Threaded Ball Valve Bolted Body

    Threaded Ball Valve Bolted Body

    With 30 years manufacturing experience, Yongyuan provides durable threaded ball valve bolted body from China. These valves are produced in conformance to oilfield industry requirements. Two-piece bolted design with a flanged body and adapter, providing solid connection to eliminate risk of end adapter blowout. Ball includes pressure equalization hole to prevent trapped pressure in the body cavity.
  • Bronze Threaded Check Valve

    Bronze Threaded Check Valve

    Find a huge selection of Bronze Threaded Check Valve from China at Yongyuan.
  • Threaded Spring Check Valve

    Threaded Spring Check Valve

    As the professional manufacturers, Yongyuan would like to provide you Threaded Spring Check Valve. And we will offer you the best after-sale service and timely delivery.
  • Cast Steel Trunnion Mounted Ball Valve

    Cast Steel Trunnion Mounted Ball Valve

    Yongyuan cast steel trunnion mounted ball valves have been pressure-tested before shipment to meet API requirements and used in transmission pipelines, terminals and storage of oil and gas fields. All these valves are in strict accordance with ASTM, API and other standards. The positive stem retention is achieved within the valve body.
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    Most of the media in chemical production equipment are highly toxic, flammable, explosive and highly corrosive. The working conditions are complex and harsh, and the operating temperature and pressure are high. Once the valve fails, the mild one will cause the medium to leak, and the severe one will cause the device to shut down Stop production, and even cause vicious accidents. Therefore, scientific and reasonable selection of valves can not only reduce the construction cost of the device, but also ensure the safe operation of production.

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    The groove connection technology of YONGYUAN VALVE breaks the limitations of traditional flange installation. Reduced-diameter valves have standard grooved interfaces and can be connected with clamps. The installation time is reduced by more than 60% compared with flanged valves. Its unique bidirectional sealing structure enables the valve to be installed at any Angle without the need for additional adjustments to the pipeline direction. In a certain data center cooling system upgrade project, the engineering team took advantage of this feature to increase the daily installation volume from 50 to 120, and the construction period was nearly halved.

  • What Makes an API 6D Ball Valve Essential for Modern Pipeline Systems?

    ​The API 6D Ball Valve plays a critical role in today’s oil, gas, and pipeline transportation industries, where safety, reliability, and compliance are non-negotiable. Designed according to the stringent requirements of the American Petroleum Institute, API 6D ball valves are widely recognized for their robust construction, tight sealing performance, and suitability for long-distance pipeline systems. Manufacturers such as ZHEJIANG YONGYUAN VALVE CO.,LTD. have continuously optimized these valves to meet global engineering demands while maintaining cost efficiency and long service life.

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