低温锻钢闸阀
products.about
低温锻钢闸阀专为-196℃至-50℃的超低温环境而设计,广泛应用于液化天然气、乙烯和空气分离装置。锻钢结构(符合ASTM A350 LF2/LF3标准)确保了其在低温下具有优异的机械性能和结构完整性,而铸造材料在低温下则可能出现脆性。
设计特点:- 加长阀盖设计,具有足够的气柱高度,可防止阀杆填料冻结 - 阀座和密封部件经深低温处理,确保尺寸稳定性 - 提供金属对金属或 PTFE/PEEK 阀座选项,实现气密性密封 - 符合 API 6D 要求的防静电和防吹出阀杆设计 - 可选配旁通和压力平衡装置,适用于高压低温应用
问:低温锻钢闸阀可承受的温度范围是多少?答:这些阀门设计用于-196°C(-320°F)至-50°C(-58°F)的连续运行工况,涵盖LNG(-162°C)、液氮(-196°C)、液氧(-183°C)和乙烯(-104°C)应用。
问:为什么低温阀门需要加长阀盖?答:加长阀盖形成气柱,起到热绝缘作用,防止低温介质到达阀杆填料处。这可以防止填料冻结变脆,从而避免阀杆泄漏。标准加长长度为阀门公称尺寸的1.5至3倍,具体取决于温度条件。
问:低温阀门使用什么材料制造?答:锻制阀体采用ASTM A350 LF2(适用于-46°C)或LF3(适用于-101°C)低温碳钢。对于-101°C以下的温度,需要使用奥氏体不锈钢(ASTM A182 F304L或F316L),因其具有优异的低温韧性。阀内件采用316不锈钢,阀座表面堆焊司太立合金。
products.technicalSpecifications
| Pressure Class | Class150-900 |
| Design Standard | BS 6364,ISO 10497,ISO 28921 |
| Body Materials | LF2, LF3, LF9, F304, F316, F321 |
产品下载

| 压力等级 | Class150-900 |
| 设计标准 | BS 6364,ISO 10497,ISO 28921 |
| products.bodyMaterials | LF2, LF3, LF9, F304, F316, F321 |
products.needQuote
Contact our engineering team for pricing and technical support on 低温锻钢闸阀.
Request a Quoteproducts.lookingMore
products.lookingMoreDesc
Ball Valves
FLOWKS offers floating ball valve, trunnion mounted ball valve and top entry ball valve for oil & gas, petrochemical and power generation. Designed per API 6D, API 608 and ASME B16.34.
DBB Valves
FLOWKS Double Block & Bleed (DBB) valves provide dual isolation with bleed verification in a single compact body. Replacing traditional multi-valve installations, FLOWKS DBB valves reduce weight, space and potential leak paths. Available in bolted bonnet, all-welded and expanding gate designs per API 6D and API 607.
Gate Valves
FLOWKS gate valves for isolation service in piping systems. Flexible wedge, solid wedge, slab and expanding gate designs per API 600, API 602 and ASME B16.34.
Globe Valves
FLOWKS globe valves for throttling and isolation. Standard, angle, Y-pattern and bellows seal configurations per API 602 and BS 1868.