891-62Celvaseal 真空密封胶

Celvaseal™ Vacuum Leak Sealant真空密封胶

Celvaseal™ leak sealant is a compound specially engineered for sealing leaks in high vacuum systems. It can repair leaks as large as 2 micro liters/second, even with the system under vacuum. Larger leaks can be repaired when the vacuum system is at atmosphere.

It is available in two forms: Spray （ozone safe） and fluid in a brush-on bottle. It has a low vapor pressure which make is suitable for use in ultra high vacuum systems and withstands repeated temperature cycling from -200°C to 400°C. （-328°F to 752°F） Steady weight loss of 1.6 x 10 ^-8 gr/cm²/hr, which is lower than most epoxy based systems. Can be used at temperatures up to 300°C （572°F） continuously, and up to 400°C （752°F） for short periods. It has good adhesion to cryogenic temperatures and excellent electrical resistivity. Can be stored longer than 1 yr at 25°C （77°F）. Density is 1.14 gr/cm ³ and viscosity is 250-1000 cPs.

Celvaseal™真空密封胶
Celvaseal™密封胶是专门设计用于密封高真空系统泄漏的化合物。 即使系统处于真空状态，它也可以修复2微升/秒的泄漏。 当真空系统处于大气压时，可以修复较大的泄漏。

它有两种形式：喷雾（臭氧安全）和刷子瓶中的液体。 它具有低蒸气压，适用于超高真空系统，可承受-200°C至400°C的反复温度循环。 （-328°F至752°F）稳定的重量损失为1.6 x 10 -8 gr / cm2 / hr，低于大多数环氧基系统。 可在连续高达300°C（572°F）的温度下使用，短时间内可在高达400°C（752°F）的温度下使用。 它对低温温度具有良好的附着力和优异的电阻率。 可在25°C（77°F）下储存超过1年。 密度为1.14gr / cm 3，粘度为250-1000cPs。

• Glass to metal seals, such as sensor pin feedthroughs
• Glass-Kovar joints
• UHV systems with small leaks on metal gaskets or high penetration welds
• Small leaks in glass vacuum systems
• Temporary repairs of small cracks in exposed gaskets
• Sealing hairline cracks in welds and brazed joints
• Thread sealant of fine pipe threads for mounting sensors and components to vacuum systems

Average curing temperature time:

• 400°C （752°F） 20-30 minutes
• 250°C （482°F） 60-70 minutes
• 230°C （446°F） 75-90 minutes
• Room temperature - Days

Celvaseal™的典型应用包括：
•玻璃 - 金属密封，例如传感器引脚穿通
•玻璃 - 可伐合金接头
•特高压系统在金属垫圈或高穿透焊缝上有小泄漏
•玻璃真空系统中的小泄漏
•临时修复暴露垫片中的小裂缝
•密封焊缝和铜焊接头的发丝裂缝
•细管螺纹密封剂，用于将传感器和组件安装到真空系统
平均固化温度时间：

•400°C（752°F）20-30分钟
•250°C（482°F）60-70分钟
•230°C（446°F）75-90分钟
•室温 - 天数

Prod #

Description

Unit

891-62

Celvaseal™ Aerosol Spray Can, 6 oz

each

891-63

Celvaseal™ Brush-on bottle, 2 oz

each