LF2M extended stem 2-piece floating ball valve is a special shut-off valve tailor-made for harsh working conditions including low temperature, high pressure, buried installation and insulated pipelines. It is an upgraded version of standard 2-piece floating ball valve. Equipped with a customized extended stem, it thoroughly solves common industry pain points such as inaccessible operation and complicated maintenance for valves covered by pipeline backfill, tank insulation or underground pipe galleries. Constructed with LF2M low-temperature forged carbon steel body, the valve can withstand sub-zero temperature and high-pressure medium impact for long-term service. It acts as core supporting equipment for LNG, liquid ammonia, oil & gas storage and transportation, fine chemical projects, and serves as the preferred control device for industrial low-temperature high-pressure piping systems.
1. Core Structure & Basic Technical Parameters
LF2M extended stem 2-piece floating ball valve adopts compact split forged 2-piece structure with low flow resistance and fast opening & closing performance. Its floating ball sealing design relies on medium pressure to automatically compress the seat, delivering outstanding tightness. It covers mainstream industrial specifications with strong adaptability.
Key Technical Parameters
Body Material: LF2M low-temperature forged carbon steel, passed -46℃ low-temperature impact test, excellent low-temperature toughness to prevent brittle fracture under cold conditions
Pressure Class: PN160 high pressure design, stable pressure resistance against high-pressure medium impact
Standard Size: DN25 (custom sizes DN15~DN100 available)
Structure Type: 2-piece floating ball design, easy disassembly and maintenance
Stem Configuration: Customizable extended stem, length ranging from 100mm to 1500mm, matching different burial depths and insulation thickness
Sealing Type: Soft seat plus auxiliary metal sealing, zero internal & external leakage, optional fire safe & anti-static structure
Operation Mode: Standard manual extended lever, optional pneumatic or electric extended actuators
2. Core Product Features to Solve Working Condition Pain Points
2.1 Forged LF2M Low-Temperature Body for Cryogenic Service
Different from ordinary WCB carbon steel valves, this valve adopts one-piece forged LF2M low-temperature carbon steel without casting pores or sand holes. It features higher material density and stronger compression resistance. It can be applied to long-term transportation of cryogenic media such as LNG and liquid ammonia at around -40℃, without material hardening, cracking or sealing failure under low temperature. Complete low-temperature material test reports are supplied to fully meet acceptance standards of high-end low-temperature industrial projects.
2.2 Custom Extended Stem, No Excavation & Insulation Removal Required for Maintenance
Standard ball valves come with short stems that are fully covered by buried pipeline soil or equipment insulation, requiring costly excavation and insulation removal for daily operation and inspection. The extended stem design lifts the operating lever above ground or insulation layers, enabling fast valve opening and closing without excavation or insulation dismantling, greatly cutting labor and material costs for later maintenance.
The integrated anti-blowout stem structure is matched with multi-layer graphite + PTFE composite packing, avoiding freezing and leakage under cryogenic conditions, with far superior sealing stability compared to ordinary modified extended stem valves.
2.3 PN160 High-Pressure Sealing System for Stable Zero Leakage
Designed for high-pressure oil, gas and chemical process pipelines, the self-tightening floating ball sealing structure pushes the ball tightly against the seat under medium pressure — tighter sealing performance is achieved as pressure rises. Auxiliary metal thrust washers effectively resist erosion and abrasion from high-pressure media to eliminate internal leakage under high pressure.
The split 2-piece structure allows quick replacement of seats and sealing components without removing the entire valve from pipelines, simplifying repair and extending service life.
2.4 Heavy-Duty Anti-Corrosion Coating for Complex Outdoor Conditions
The valve body is coated with double-layer epoxy zinc-rich anti-corrosion paint, the flange sealing surface is treated with special rust-proof protection, and exposed stem parts adopt stainless steel anti-corrosion treatment. It resists acid-base soil corrosion, desert wind sand and humid low-temperature environments, delivering stable performance for buried or open-air installation, extending service life and reducing valve replacement frequency in projects.
3. Main Application Scenarios
With outstanding low-temperature resistance, high pressure tolerance, low maintenance and easy operation, LF2M extended stem 2-piece floating ball valve is widely used in various harsh industrial environments:
Cut-off control systems for LNG and liquid ammonia cryogenic storage tank bottom
Buried high-pressure transmission pipelines for urban gas and oilfields
Insulated underground process pipelines and closed pipe gallery systems in chemical parks
Cryogenic transmission pipelines for liquid nitrogen, liquid oxygen and other special low-temperature media
Overseas oil, gas and chemical outdoor high-pressure low-temperature engineering projects
4. Brand Advantages of J-VALVES
Most extended stem valves on the market are modified from standard valves with poor coaxiality, easy sealing failure and unqualified low-temperature performance. Founded in 2009, J-VALVES is a professional valve manufacturer with 16 years of industry experience that independently develops and mass produces LF2M extended stem 2-piece floating ball valves. We complete the whole production process in-house, including body forging, integrated stem machining, sealing matching and anti-corrosion coating, without outsourced modification.
Every valve undergoes 100% hydrostatic and air pressure testing before delivery, complete with material certificates, pressure test reports and low-temperature inspection documents, complying with API 6D, GB and multiple international standards. Standard DN25 PN160 models are kept in stock for fast delivery, while non-standard extended stem sizes can be customized within a short lead time, outperforming peers in delivery efficiency and product stability. Our products have served oil and chemical projects in more than 40 countries worldwide with abundant mature application cases.
5. Conclusion
LF2M extended stem 2-piece floating ball valve is a customized valve specially designed for low-temperature high-pressure, buried and insulated working conditions, perfectly solving pain points of traditional ball valves such as inaccessible operation, easy damage under low temperature, high-pressure leakage and high maintenance costs.
With mature forging technology, customized production capacity and strict quality control system, J-VALVES provides high-quality, stable integrated solutions of low-temperature high-pressure extended stem ball valves for industrial projects at home and overseas, acting as a reliable valve supplier for oil, gas and chemical cryogenic pipeline engineering.
