Single metal bellows seals for high temperature and low temperature applications (API 682, Type C)

SO series welded metal bellows cartridge single mechanical seals are
designed for sealing many fluids including chemically aggressive with
temperature from -70 to +425°C.

SO family seals are used for the same applications as the followings seals:
MFLWT 80 by Burgmann Germany
BXRH/BXHH by Flowserve, USA
604/606/609/3609 by John Crane, USA
34 family by EKK Eagle, Japan

Advantages

• Welded metal bellows mechanical seals feature no rubber secondary seals; all seal components are made of advanced thermally and chemically resistant materials to substantially expand the range of application temperatures and fluids.
• The SO series mechanical seals are fitted with a throttle bushing as a secondary seal; it can be used to seal inflammable fluids in compliance with OST 26-06-2028-96
• Compared to spring-loaded mechanical seals, metal bellows seals are more resistant to clogging and hang-up.
• Shaft sleeve is sealed by a gland tightened graphite gasket. This provides for higher sealing safety especially with worn out or scratched/galled shafts.
• Metal bellows mechanical seals are balanced, so they have lower heat generation.