Type 8628VSC is a standardized non-pusher elastomer, dry running non-contacting secondary containment seal designed specifically for refined oil hydrocarbon services, with a focus on meeting the demanding requirements of pipeline pumping station duties. The main risk of seal failure in these applications is due to the numerous problems associated with the secondary dynamic O-ring, potentially resulting in hang-up, fretting or stub sleeve wear. The design of theType 8628VSC completely eliminates these common problems. The Type 8628VSC is used in tandem with a primary seal such as theType 8648VRS. In response to primary seal leakage or in the event of failure, the Type 8628VSC faces close down to seal the process and direct process flow to flare or drain. This represents a less complex alternative to dual unpressurized seals using an API Plan 52.
