抽汽逆止阀

抽汽逆止阀    Extraction check valve

    适用于公称压力PN16~420bar（class150~2500），工作温度≤620℃的石油、化工、电力行业等各种工况的蒸汽管路上，防止介质倒流。

其主要结构特点：

1、产品结构合理、密封可靠、性能优良、造型美观；

2、密封面堆焊Co基硬质合金，耐磨、耐蚀、抗擦伤性能好，实用寿命长；

3、开启压力小，阀瓣在很小的压差下就能完全打开；

4、内装式的销轴结构，减小外泄漏点，使用可靠；

5、公称压力≥250bar（class1500）中腔采用自密封结构，密封性能随压力升高而增强，保证了密封性能；

6、零件材质及法兰、对焊端尺寸可根据实际工况或用户要求合理选配，满足各种工程需要。

    It is suitable for pipelines with various working conditions such as nominal pressure PN16 ~ 420bar (class 150 ~ 2500) and working temperature ≤620 ℃, to prevent the medium from flowing backward.

Its main structural characteristics:

1. Reasonable product structure, reliable seal, excellent performance and beautiful appearance;

2. The sealing surface is welded with Co-based hard alloy, which has good wear resistance, corrosion resistance, abrasion resistance and long practical life;

3. The opening pressure is small, and the valve flap can be fully opened under a small pressure difference;

4, built-in pin structure, reduce external leakage points, reliable use;

5. The self-sealing structure is adopted in the middle cavity with a nominal pressure ≥250bar (class1500), and the sealing performance is enhanced with the increase of pressure to ensure the sealing performance

6. Parts materials, flanges and butt-weld end dimensions can be reasonably selected according to actual working conditions or user requirements to

技术参数  technical data

公称压力：ANSI 150~ANSI2500

公称通径：DN15~DN600

温度范围：-196℃~+620℃

适用介质：蒸汽

Technical data

Nominal pressure: ANSI 150 ~ ANSI600

Nominal diameter: DN25 ~ DN600

Temperature range: -196 ℃ ~ + 620 ℃

Applicable medium: steam

螺栓压紧阀盖

自密封阀盖