2205 globe valve

2205截止阀Technical Analysis
2205 duplex stainless steel (UNS S32205/S31803) globe valves have become key control components in harsh working conditions such as chemical and energy industries due to their high strength and corrosion resistance. The following analysis will focus on core features, structural design, application scenarios, and maintenance points:


1、 Material characteristics and performance advantages
Dual phase organization enhances performance
Chemical composition: 22% chromium, 5.3% nickel, 3.2% molybdenum, and 0.16% nitrogen form an austenite ferrite dual phase structure, with a yield strength of ≥ 450MPa (twice that of 304 stainless steel), a hardness of ≥ 290HB, and significant resistance to erosion and wear.
Corrosion resistance:
Resistant to chloride ion corrosion of ≤ 10000ppm, suitable for environments such as seawater and sulfur-containing flue gas;
The annual corrosion rate is less than 0.1mm at various concentrations of sulfuric acid, acetic acid, and mixed acid below 70 ℃.
Sealing and structural design
Sealing form:
Soft seal: PTFE valve seat achieves ANSI Class VI zero leakage, temperature resistance ≤ 260 ℃;
Hard seal: valve disc welded with Stellite alloy (HRC55-60), pressure resistance ≤ 16.0MPa, temperature resistance ≤ 300 ℃.
Valve body flow channel type:
Structural Type Characteristics Applicable Scenarios
Direct flow resistance is small (Δ P ≤ 0.02MPa), and the fully open flow capacity reaches 100% for high-temperature oil pipes in petroleum refining
Y-shaped 45 ° valve seat design achieves self-cleaning and prevents particle deposition in saline wastewater system 57
Angle type 90 ° turning saves space and is suitable for corrugated pipe sealing (-196 ℃ deep cold working condition) LNG receiving station
2、 Key technical parameters
Explanation of Parameter Index Range
Nominal diameter DN15-DN600 small diameter instrument to main pipeline
Pressure rating PN16-PN160 American standard 150LB-1500LB
Applicable temperature -50 ℃~300 ℃, upper limit of hard sealing structure
Connection method: flange/thread/welding. The flange type has the strongest universality
Drive mode: manual/gear/pneumatic/electric, supporting automation control

三、典型应用场景
‌强酸介质控制‌
硫酸储运系统（浓度≤98%，温度≤70℃）、醋酸管道，耐蚀性优于316L‌。
‌环保与能源‌
电厂脱硫塔喷淋系统、烟气余热回收管路，耐受pH 1-13的腐蚀性废水。
‌海洋工程‌
海水冷却管路及淡化装置，抗盐雾腐蚀寿命达普通阀门3倍‌。
‌制药与食品‌
反应釜进出料控制，符合无菌要求；酱油罐、料酒管道耐酸性介质。

四、2205截止阀安装与维护规范
‌流向要求‌：严格遵循"低进高出"原则，阀瓣下方为进口，禁止倒装；
‌防结晶处理‌：含颗粒介质需定期冲洗阀腔，防止卡阻（如每季度清理）‌；
‌密封维护‌：
软密封阀每6个月检测PTFE阀座老化情况‌；
硬密封阀检查司太立合金层磨损度，磨损超0.5mm需修复‌。

注：选型需综合介质腐蚀性、温度压力匹配密封形式，含氯离子工况优先软密封，高温高压场景选用硬密封结构‌。