Trunnion Mounted Ball Valve

Trunnion Mounted Ball Valve Manufacturer

TIANYU are top of the best professional Trunnion-Mounted Ball Valve Manufacturers in China.
Design Standards: API 6D, API 608, ISO 17292, BS 5351
Size Range: 1/4 – 60 Inch
Pressure Range: Class 150-2500 LB, 10000 PSI (API 6A Products)
Material Range: Cast Steel, Forged Steel, Carbon Steel, Stainless Steel, Alloy Steel, Bronze, Ti
End Connections: Flanged (FF, RF, RTJ), Socket Weld (SW), Threaded (NPT, BSP), Butt Weld (BW), HUB
Body Structures: End Entry, Top Entry (easy for on-line maintenance)
Body Types: 2pc split body, 3pcs split body
Body&Bonnet Connection: Bolted Bonnet, Full Welded Bonnet (for Hazardous service need longer working life with less leakage point)

API 6D DN15-DN2000 Class 600 Flanged End Gear Operated High‑Pressure Forged Steel Trunnion‑Mounted Fixed Ball Valve

TIANYU API 6D compliant forged‑steel trunnion‑mounted flanged ball valves represent high‑reliability quarter‑turn shut‑off hardware engineered for severe high‑pressure industrial‑pipeline service. Forged‑A105 pressure‑retaining components eliminate casting‑origin defects, trunnion‑supported ball architecture lowers operating torque and mitigates seat abrasion, while Stellite‑overlay metal‑hard‑seal assembly delivers durable sealing performance under thermal‑cycling and particle‑laden process‑media conditions.

API 6D 20“ Class1500LB A105 Zero Leakage Turbine Forged Steel Worm Gear 3PC 600 Pound Flange Trunnion Ball Valve

TIANYU 16” Class 1500LB A105 forged three-piece trunnion ball valve complies with API 6D, API 607 and CE PED standards, fitted with UNS S32205 duplex trim and fire-safe Class VI zero-leak composite seal. Its dual trunnion fixed ball eliminates high-pressure sealing deflection, full bore full flow channel delivers ultra-low fluid resistance to cut energy consumption, and split three-piece forged body enables convenient on-site internal part replacement

API 6D ASME B16.34 API 607 CE 3” 1500LB F22 Alloy Steel Body 304 Stainless Steel Seat Hard Seated RF Flanged Gear Operated Double Block and Bleed (DBB) Trunnion Mounted Ball Valve

API 6D 3” 1500LB DBB trunnion mounted ball valve is a premium high-pressure fluid control solution engineered for critical industrial applications, blending F22 alloy steel’s high-temperature strength with 304 stainless steel’s corrosion resistance and hard-seated durability. Its DBB design eliminates leak points and simplifies maintenance, while the trunnion mounted configuration ensures reliable sealing under extreme pressure. Certified to API 6D, ASME, API 607, and CE standards, and backed by ISO 9001/API Q1 quality assurance, it excels in oil and gas, refining, and power generation, delivering uncompromising safety, regulatory compliance, and long-term value for high-pressure critical service systems worldwide.

API 6D ANSI CLASS300 CE NACE MR0175 DN300 CF8/CF8M Stainless Steel 2PC Flanged Trunnion Mounted Ball Valve

TIANYU API 6D DN300 CLASS300 trunnion mounted ball valve is a premium fluid control solution engineered for critical oil and gas, petrochemical, and industrial applications, blending CF8/CF8M stainless steel corrosion resistance with NACE MR0175 sour service compliance and API 6D pipeline valve standards. Its trunnion mounted design delivers unrivaled bi-directional sealing and low operating torque

API 609 ASME CE DN250 150LB WCB Carbon Steel Body F304 Stainless Steel Seat Flanged Connection Gear Operated Trunnion Mounted Soft Seated Ball Valve

The TIANYU 10” 150LB trunnion mounted ball valve delivers robust, reliable performance for critical fluid isolation and flow control applications, combining WCB carbon steel’s durability with F304 stainless steel’s corrosion resistance. Its trunnion mounted design ensures consistent sealing under pressure, while the soft-seated configuration achieves bubble-tight shutoff. Certified to API, ASME, and CE standards, and backed by ISO 9001 quality assurance, it excels in oil and gas, chemical processing, and power generation, ensuring operational safety, regulatory compliance, and long-term value for industrial infrastructure.

API 608 ASME B16.34 CE PED 2014/68/EU Certified DN150-DN1400 PN10-PN64 Class 150-400 WCB/CF8 Fixed Trunnion Mounted Metal Hard Seal Ball Valve

TIANYU’s API 608-certified fixed trunnion metal hard seal ball valve delivers robust flow control for oil & gas, petrochemical, and power sectors. WCB/CF8 construction, Stellite overlay, and trunnion design ensure durability, low leakage, and adaptability to -20℃–425℃. Customize it: opt for duplex steel (corrosion resistance), RTJ flanges (high pressure), secondary soft seal (Class VI), or electric actuation (remote control). Tailored to your media and system needs, it balances safety, compliance, and cost-effectiveness—your trusted critical-service valve solution.

Trunnion Mounted ball valves excel in high-pressure, low-torque, and bidirectional sealing for industries.

The trunnion-mounted ball valve is mainly used in the pipeline for on-off applications.
Trunnion Mounted ball valves have become the preferred choice for large-diameter and high-pressure pipeline systems in industrial fields due to their high-pressure stability, low-torque operation, and bidirectional sealing capability. They excel particularly in scenarios requiring long-term reliable sealing and safe shut-off.

THE STRUCTURE OF TRUNNION MOUNTED BALL VALVES

TianYu Trunnion Mounted Ball Valve is a type of ball valve with a fixed ball supported by trunnions, or pivots, at the top and bottom, providing stability and reducing the torque required to operate the valve. This design allows for better handling of high-pressure applications and larger valve sizes. The trunnion supports absorb the pressure load, making the valve suitable for demanding environments. Trunnion ball valves offer reliable sealing and minimal leakage, making them ideal for use in oil and gas, petrochemical, and industrial applications. Their robust construction ensures durability, low maintenance, and efficient performance in critical systems.

The ball is fixed by a stem and trunnion, and the seats are a spring-loaded assembly of seat retainer (Metal) and seat insert (Soft). Under low pressure the spring will force the seat to ball and when under high pressure, the fluid will push the seats to seal. Compared with floating valves, it has a wider size and pressure range, with lower operation torque which can save the actuator cost.

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Trunnion Mounted Ball Valve Parts

Why Choose Us

Ensure Safety

Our products and services comply with international standards and specifications to make sure that we only produce the best and highest quality products and services to our clients.

Customization Service

We offer tailor-made industrial valves to ensure that our product fits your application standards and demand. TIANYU is ISO, API, MSS, and ASME compliant to guarantee you the highest product quality.

Fast Shipping

As a business partner, TIANYU makes sure that we commit to our clients’ requested deadline because we very much understand the importance of adhering to the timeline required.

After-Sales Service

TIANYU’s service does not end once our industrial ball valves are being delivered. Also, we offer warranties and provide customer service to our clients as part of our quality service.