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8" 1500LB API Standard High Pressure Trunnion Ball Valve

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This product is an 8-inch (DN200) full bore trunnion mounted ball valve with pressure rating Class 1500 LB (PN250). It is strictly designed and manufactured in accordance with API 6D pipeline valve standards, suitable for severe working conditions such as petroleum, natural gas, chemical industry and high-pressure fluid transmission. Adopting a three-piece forged body structure combined with a trunnion mounted design, it ensures long-term stable operation with low torque and high sealing reliability under high differential pressure conditions.

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8 1500LB API Standard High Pressure Trunnion Ball Valve

Core Technical Parameters

Specification Item	Parameter
Nominal Diameter	1/2"~56" (DN15~DN1400)
Pressure Class	150LB~2500LB (PN20~PN420)
Design Standard	API 6D, ASME B16.34
Face-to-Face Dimension	ASME B16.10
End Connection	RF / RTJ Flange (ASME B16.5) or BW Butt Weld (ASME B16.25)
Body Material	ASTM A105 (Forged Carbon Steel), ASTM A182 F316/F51 (Stainless Steel / Duplex Steel), etc.
Ball / Seat	13%Cr Stainless Steel; Optional SS304/316/316L or Duplex Steel
Sealing Level	Soft Seal: Zero Leakage (Bubble Tight); Metal Seal: ANSI/FCI 70-2 Class V/VI
Temperature Range	-46°C ~ +120°C (Standard); Up to +540°C for Metal Seal
Operation Mode	Manual (Gear Box), Electric, Pneumatic, Hydraulic
Test Standard	API 598 / API 6D (Shell Strength, Sealing, Low-pressure Air Seal)

Structural Features & Advantages

Trunnion Mounted Double Bearing Design: The ball is fixed by upper and lower stems and supported by bearings. Medium pressure is borne by the seat spring loading system instead of pushing the ball against the seat. This design greatly reduces operating torque, enabling easy opening and closing under 1500LB high-pressure conditions and avoiding operation jamming of conventional floating ball valves caused by excessive differential pressure.
Double Block & Bleed (DBB) Function: A bleed/drain port is arranged in the valve body cavity. When the valve is closed, independent double-side sealing of upstream and downstream can be realized, and sealing integrity can be verified through cavity bleeding. It meets the requirements of pipeline isolation, safety maintenance and pressure relief, complying with API 6D DBB specifications.
Fire Safe Design: Adopts API 607 / API 6FA certified fire safe structure: after the soft seal seat is burned out in a fire, the metal seat and ball still maintain metal-to-metal sealing; graphite packing and body gaskets ensure no external leakage during fire, safeguarding the safety of critical pipelines.
Anti-Static & Blowout-Proof Stem: Standard equipped with anti-static device to ensure electrical continuity among ball, stem and valve body, eliminating static accumulation risks. The stem adopts blowout-proof shoulder design to prevent stem ejection when internal pressure rises abnormally, protecting personnel and equipment safety.
Emergency Sealant Injection System: Grease injection ports are provided at seats and packing. Under extreme working conditions or seal damage, special sealant can be injected for emergency sealing, extending valve service life and reserving maintenance window period.
Cavity Pressure Relief: When the cavity pressure exceeds 1.33 times of pipeline pressure, the seat spring automatically relieves pressure to the pipeline side, preventing overpressure risk of the valve cavity caused by medium thermal expansion.

Material Configuration Options

Working Condition Type	Recommended Body Material	Seat Material
Conventional Oil & Gas / Water	ASTM A105 / A350 LF2	RPTFE / DEVLON / PEEK
Corrosive Medium	ASTM A182 F316 / F316L	SS316 + Nylon / PEEK
Sulfur-Containing / Acidic Natural Gas	ASTM A182 F51 (Duplex Steel)	PEEK / Metal Seal + Tungsten Carbide Coating
High Temperature & High Pressure	ASTM A217 WC6/WC9 (Chrome Moly Steel)	Metal Seal (Stellite / Tungsten Carbide Hard Facing)

The metal seal solution adopts HVOF supersonic sprayed tungsten carbide or Stellite alloy, paired via precision grinding to achieve Class V/VI sealing performance, applicable to extreme working conditions with solid particles, high temperature or strong corrosion.

Typical Application Scenarios

Long-distance Pipeline: Isolation and cut-off of crude oil, refined oil and natural gas trunk lines
Oil & Gas Field Surface Engineering: High-pressure manifold of wellheads, gathering stations and processing plants
Petrochemical Plant: High temperature and high pressure working positions for hydrocracking and catalytic cracking units
LNG Terminal: Low-temperature and high-pressure natural gas transmission system
Power Industry: High-pressure isolation for steam, feed water and fuel systems

Quality & Certification

Design & Manufacture: API 6D, ASME B16.34, BS 5351, ISO 14313
Flange Standard: ASME B16.5 / B16.47 (Series A/B)
Inspection & Test: API 598, API 6D (Including Low-pressure Air Seal Test)
Fire Safety Certification: API 607, API 6FA
Functional Safety: Optional SIL Certification (Electric/Pneumatic Actuator)
NACE Compliance: NACE MR0175/ISO 15156 (Optional for Acid Service)

Dimension & Weight Reference (Class 1500, 8" Full Bore)

End Connection	Face-to-Face A	Height H	Approx. Weight
RF Flange	832 mm	376 mm	880 kg
RTJ Flange	841 mm	376 mm	880 kg
BW Butt Weld	832 mm	376 mm	616 kg

Note: Specific dimensions may vary slightly due to manufacturer design differences, subject to final technical drawings.

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