24"PN160 LF2 Three Piece Trunnion Mounted Ball Valve

LF2 Forged Low-Temperature Carbon Steel: The valve body is integrally forged from ASTM A350 LF2 low-temperature carbon steel with strictly controlled chemical composition and low phosphorus and sulfur content. It has 100% passed the -46℃ Charpy V-notch impact test (≥20J), with tensile strength ≥485MPa and yield strength ≥250MPa, ensuring excellent toughness and crack resistance in cryogenic service and preventing cold brittleness fracture.

Three-Piece Body Construction: Composed of a main body and two side bodies, connected by high-strength low-temperature alloy steel bolts. The side bodies can be disassembled online for replacement of seats, ball, seals and internal trim without removing the valve from 24-inch extra-large bore ultra-high pressure pipelines, greatly reducing downtime and maintenance costs.

Trunnion-Mounted Ball Design: The ball is supported and positioned by upper and lower trunnions. Medium pressure is borne by seat springs and piston effect, delivering stable operating torque independent of pressure differential. This avoids sharp torque increase and seizure risks of floating ball valves under 24-inch DN600 PN160 ultra-high pressure conditions, ensuring smooth and reliable opening and closing.

Ultra-High Pressure Flanged Connections: The valve ends are equipped with Type B (raised face) or Type E (ring joint face) flanges complying with EN 1092-1 PN160. For 24-inch (DN600) PN160 flanges, outer diameter is 890mm, bolt circle diameter 795mm, 20×M52 bolts, flange thickness 140mm, guaranteeing reliable connection and sealing at 16.0MPa ultra-high pressure.

Dual Seat Sealing: Dual sealing design with upstream and downstream seats provides bi-directional sealing. A dual mechanism of post-mounted spring preload and medium pressure self-energization is adopted: springs ensure initial sealing at low pressure, while medium pressure drives the seat to enhance sealing at high pressure, with sealing performance improving as pressure rises.

DBB Double Block & Bleed: Optional dual-seat double block structure with a bleed valve in the body cavity, realizing double isolation of pipelines to meet safe maintenance and pigging requirements, in accordance with API 6D DBB specifications.

Emergency Seal Lubrication System: Zerk fittings are installed at the seat and stem areas. In emergency conditions, sealing compound can be injected to achieve temporary sealing, buying time for pipeline repair and reducing leakage risks.

Fire-Safe Design: Complies with API 6FA / API 607 standards. In the event of soft seal burnout, metal seats and ball form a metal-to-metal backup seal to prevent massive medium leakage under fire conditions.

Anti-Static Device: Built-in anti-static spring and steel ball ensures electrical continuity between ball, stem and body, preventing static accumulation caused by medium flow that may lead to fire or explosion.

Blowout-Proof Stem: The stem is of bottom-entry integrally forged design with anti-blowout steps and multiple sealing rings. Even if the gland accidentally loosens, the stem remains retained by the body, ensuring operational safety under ultra-high pressure conditions.

Low-Torque Bearing Design: Upper and lower trunnions are fitted with low-friction coefficient bearings and thrust washers, significantly reducing operating torque for the 24-inch large-diameter ball. Large electric, pneumatic or hydraulic actuators can be optionally equipped, lowering driving cost and energy consumption.

Connection Type: Flanged (Type B RF / Type E RTJ) to EN 1092-1 PN160; BW butt-weld ends available on request

Flange Face Dimensions: To EN 1092-1, DN600 PN160 Type B flange: OD 890mm, bolt circle 795mm, bolt hole 52mm, 20×M52 bolts, flange thickness 140mm, raised face height 3mm

Face-to-Face Dimension: To EN 558 / ISO 5752, approx. 1200mm for DN600 PN160 trunnion-mounted ball valve (subject to manufacturer’s data)

Operation: Manual (worm gear, mandatory), pneumatic (scotch yoke / rack & pinion for high torque), electric (multi-turn / quarter-turn, intelligent), hydraulic, gas-hydraulic actuator (emergency shutdown)

High-Pressure Sections of Natural Gas Transmission Pipelines: Used as 24-inch extra-large bore high-pressure block valves for main gas pipelines and inlet/outlet valves of compressor stations. PN160 rating satisfies 10–16MPa high-pressure transmission, while LF2 material adapts to low-temperature environments in cold regions.

LNG Facilities: Applied in cryogenic natural gas pretreatment, liquefaction, regasification and other process pipelines of LNG liquefaction plants and receiving terminals. -46℃ low-temperature toughness ensures reliable valve performance in LNG service, and 24-inch large bore enables high-flow transportation.

Low-Temperature Chemical Processes: Used in 24-inch process pipelines of low-temperature and high-pressure chemical plants for ethylene, propylene, ammonia and others. LF2 material withstands -46℃ low temperature, and PN160 rating meets high-pressure reaction system requirements.

High-Pressure Gas Storage: Applied in 24-inch high-pressure gas injection and production pipelines of underground gas storage reservoirs and tanks. PN160 rating satisfies 25–40MPa gas injection pressure (with wellhead throttling).

High-Pressure Coal Chemical Systems: Used in 24-inch syngas and hydrogen pipelines of high-pressure process units such as coal-to-gas and coal-to-liquid facilities. LF2 material meets general corrosion and low-temperature service requirements.

General Industrial Use: Suitable for high-flow control and isolation of 24-inch ultra-high pressure low-temperature water, oil, gas and other media, especially for applications requiring online maintenance and long-term low-temperature operation.

Adaptability to Ultra-High Pressure & Extra-Large Bore: PN160 (16MPa) ultra-high pressure rating meets extreme service conditions, and 24-inch extra-large bore enables ultra-high flow delivery, serving as core equipment for large-scale low-temperature and high-pressure systems.

Guaranteed Low-Temperature Toughness: LF2 material 100% impact tested at -46℃ eliminates cold brittleness fracture risks of carbon steel valves at low temperatures, ensuring safe control of low-temperature media such as LNG and in cold regions.

High-Pressure Stability of Trunnion-Mounted Ball: Operating torque is independent of medium pressure, avoiding torque surge in 24-inch DN600 PN160 service. Worm gear, electric, pneumatic and hydraulic actuators can be selected economically, with smooth, non-seizure operation.

Safe DBB Isolation: Optional double block & bleed function satisfies safe maintenance and pigging requirements in compliance with API 6D, reducing safety risks during maintenance of ultra-high pressure extra-large bore pipelines.

Matching Low-Temperature Bolts: A320 L7/L7M low-temperature bolts 100% impact tested at -100℃ match LF2 body material, preventing flange leakage caused by bolt cold brittleness.

Multiple Safety Guarantees: Self-relief, emergency lubrication injection, fire-safe, anti-static, blowout-proof and other safety mechanisms meet SIL requirements, safeguarding public safety under ultra-high pressure.

European Standard Compatibility & Interchangeability: Strictly conforms to EN 1092-1, EN 12516, EN 558 and API 6D standards, fully interchangeable with DN600 PN160 valves and pipeline accessories of major European brands, reducing inventory and replacement costs.