Type FAP8-1 multiple spring pusher seal (API 682 Categories 2 and 3, Type A, Arrangement 1) is specified within API 682 for sealing low temperature flashing hydrocarbons. Type FAP8-1 seal is designed to minimize the pressure distortion and flashing potential of light hydrocarbon fluids to provide long seal life and low fugitive emissions. Typically, a Plan 11 flush or a Plan 23 is applied depending on the pumping temperature. If the pumping temperature is above 140°F/60°C, acirculating device should be added.

Dual unpressurized (FAP8-2) and dual pressurized (FAP8-3) seals may also be considered for these services, especially LPGs.Type FAP8-1 single seals typically control emissions to less than 500 ppm.

Design Features:

• API 682 qualification tested.
• Easy-to-install cartridge design with registered fit.
• Segmented spring-loaded carbon throttle bushing for effective containment.
• Distributed flush optimizes circulation of liquid at faces and prevents trapped vapor.
• Available with pumping ring when utilizing an API Flush Plan 23.
• Dual seals equipped with pumping ring for optimized flow.

Type F-AP8-2 is a Dual, Unpressurized, engineered O-ring Cartridge Seal (API 682 Categories 2 and 3, Type A, Arrangement 2). A standardized cartridge arrangement, certified as compliant to API 682 when supplied with qualified face material pairs and is supplied in two arrangements: wet seal for use with liquid buffer fluids. Inner wet seal plus containment seal for use with gaseous buffer fluids.

Design Features :

• API 682 qualification tested.
• Easy-to-install cartridge design with registered fit.
• Distributed flush optimizes circulation of liquid at faces and prevents trapped vapor.
• Dual seals equipped with pumping ring for optimized flow.

Type F-AP8-3 is a Dual Pressurized, engineered O-ring Cartridge Seal (API 682 Categories 2 and 3, Type A, Arrangement 3) with a standardized cartridge arrangement, certified as compliant to API 682 when supplied with qualified face material pairs. API 682 defaults to FB (face to back) configuration for dual pressurized seals, also available in BB (back to back) and FF (face to face) arrangements and fully qualified.

Design Features :

• API 682 qualification tested.
• Easy-to-install cartridge design with registered fit.
• Distributed flush optimizes circulation of liquid at faces and prevents trapped vapor.
• Dual seals equipped with pumping ring foroptimized flow.