Product
2205 gate valve
Brand:Pneumatic eccentric butterfly valve 型号:Z41W-16P
2205闸阀Technical Analysis1、 Core material characteristics
2205 duplex stainless steel (UNS S32205/S31803) is composed of a dual phase structure of ferrite and austenite (≈ 50:50), containing 22% chromium, 5.3% nickel, 3.2% molybdenum, and 0.16% nitrogen12. Its core advantages include:

高强度耐蚀性:屈服强度≥450MPa(是304不锈钢的2倍),抗氯离子腐蚀能力(Cl⁻≤10000ppm),适用于海水、含硫介质等高腐蚀环境。High strength corrosion resistance: yield strength ≥ 450MPa (twice that of 304 stainless steel), resistance to chloride ion corrosion (Cl ⁻ ≤ 10000ppm), suitable for high corrosion environments such as seawater and sulfur-containing media.
Fatigue wear resistance: Hardness ≥ 290HB, excellent anti erosion wear performance, especially suitable for media containing particles (such as slurry, pulp).
2、 Structural Design and Sealing Technology
Classification of gate structures
Bright stem gate valve: The valve stem is exposed, and the opening and closing status is intuitive, making it easy to lubricate and maintain. It is suitable for large-diameter pipelines (DN ≥ 100).
Hidden stem gate valve: The valve stem is built-in, with a constant height, saving installation space, and requires an opening indicator.
Elastic gate: with a slotted design in the middle, it can adaptively compensate for thermal deformation (deformation ≤ 0.1mm) to avoid jamming.
密封系统

双向硬密封:密封面堆焊司太立合金(Stellite 6)或碳化钨涂层(HRC55-60),耐高温(≤300℃)及颗粒冲刷。
阀杆防泄漏:柔性石墨填料(耐温260℃)或金属波纹管(剧毒介质适用,泄漏率≤10⁻⁷ Pa·m3/s)。
三、关键技术参数
参数 指标范围 适用场景
公称通径 DN15–DN1200 小型仪表至大型主管道
压力等级 PN16–PN160 美标150LB–1500LB
适用温度 -50℃~300℃ 硬密封结构耐高温
连接方式 法兰/对夹/焊接 法兰式通用性强,焊接式耐高压
四、行业应用场景
焦化与化工
荆门焦化装置中,Z41Y-150LB-DN100型号用于焦炭塔底阀,耐受硫化氢腐蚀与160℃高温,降低维护成本50%。
海洋工程
海水淡化高压泵出口,抵抗氯离子腐蚀(Cl⁻≤35000ppm),寿命达普通阀门3倍。
造纸与环保
漂白工段含氯介质(pH 1-13),年腐蚀速率<0.02mm,优于316L不锈钢。

五、选型与维护要点
选型建议:
高压化工管线→固定球结构闸阀(防阀杆吹出);
含颗粒介质→V型切口闸板防卡阻。
安装维护:
水平安装确保闸板受力均匀;
含结晶介质需定期冲洗阀腔,清除沉积物;
检查阀杆倒密封结构,预防介质外漏。
注:2205闸阀通过双相钢材料与弹性密封设计,在腐蚀性、高温高压工况下实现高可靠性,选型需综合介质特性与压力等级匹配结构形式。
天津一标阀门生产2205球阀、2205蝶阀、2205截止阀、2205闸阀。
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