Bushing John crane
Bushing John crane

Features Secondary Containment Bushing

  • California Residents: PROPOSITION 65 WARNING
  • Restricts leakage beyond primary bushing at full pipeline pressure in the event of primary seal failure in both dynamic and static operation to 1500 psi g (103 bar g).
  • Enables upset to be detected, switched off, and pump shaft to coast down without significant release to the environment.
  • Increases seal mean time between repair in the most difficult crude-oil applications, when used with 8648VRS ‘NPSS’ technology.

Recommended Applications

  • Crude oil pipeline pumps

About Secondary Containment Bushing

The SCB Secondary Containment Bushing is a standardized, dual-bushing arrangement intended for use in conjunction with API Plan 66A. It is used as the back-up to a primary seal and is usually incorporated into the cartridge. This seal is specifically targeted at crude-oil pipeline pump seals, such as the 8648VRS.

Design Features Secondary Containment Bushing

  • Restricts leakage past primary bushing at full pipeline pressure in the event of primary seal failure in both dynamic and static operation to 1500 psig/103 barg
  • Enables upset detection, pump switch off and cost down without significant release to environment
  • Can be used with 8648VRS ‘NPSS’ technology to increase seal MTBR reliability even in the most difficult crude oil applications

Material Secondary Containment Bushing

  • O-ring (adaptive hardware) : Fluoroelastomer: temperature limit: -20°F to 401°F/-29°C to 205°C
  • Bushing: Carbon
  • Assembly/Adaptor/Auxiliary gland: 316 Stainless steel
  • Sleeve hard coating: Tungsten carbide

Operating range Secondary Containment Bushing

  • Temperature Limits
    -20°F to 400°F/-30°C to 205°C

  • Pressure Limits
    Up to 100 barg/1500psig
    Static Pressure up to 152 barg (2200 psig)

  • Speed Limits
    3500fpm/17.8m/s

Product Description

The secondary containment bushing (SCB) is standardized dual bushing arrangement intended for use in conjunction with the 66A piping plan.
It is used as the back-up to a primary seal and is usually incorporated into the cartridge. This seal is specifically targeted at crude oil pipeline pumps. The dual bushing arrangement consists of primary and secondary bushings in a cartridge, complete with a port for measuring pressure upstream of the primary bushing, and a port for drainage between the bushings.

Material Secondary Containment Bushing

  • O-ring (adaptive hardware) : Fluoroelastomer: temperature limit: -20°F to 401°F/-29°C to 205°C
  • Bushing: Carbon
  • Assembly/Adaptor/Auxiliary gland: 316 Stainless steel
  • Sleeve hard coating: Tungsten Secondary Containment Bushingcarbide