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B-12 bellows valve is suitable for connecting and controlling vacuum and high-purity gas pipelines. Adopting the form of sealing gasket and valve body soft seal, and valve body metal hard seal; Sustainable metal corrugated pipes ensure ultra-high internal and external air tightness. The surface of the valve body is treated with mechanical grinding, electrolytic grinding, ultrasonic cleaning, and 100% helium testing and degreasing treatment.
PARAMETERS:
流量系数(Cv) Flow coefficient Cv | 2.3 |
公称压力 Max.working pressure | 3500psig (241bar) |
工作温度 Temperature range | -25℃~65℃ |
泄漏率(氦气) Leak rate(helium) | 内部internal:≤ 2×10-10Pa·m3/s 外部external:≤2×10-10Pa·m3/s
|
连接方式 Connections | 1/2"VCR、3/4"VCR、焊接Welding |
孔径 Seat diameter size | 12mm |
MEDIUM WETTED MATERIALS:
阀 体 Body materials:AISI 316L/316L vim+var/哈氏合金 Hastelloy
波纹管 Corrugated tube : AISI 316L/哈氏合金 Hastelloy
阀 座 Seat disc:PCTFE/PVDF/PI
OPTIONS:
电化学抛光 Electrochemical polishing
洁净室装配(百级洁净室) Cleanroom assembly (Class 100 cleanroom)