Material Combinations (Optional)

Seal faces: Silicon carbide (SiC) / tungsten carbide(TC) / carbon graphite for wear resistance and high‑temperature stability.

Metal components: 316L stainless steel, duplex, or super duplex stainless steel for corrosion resistance.

Secondary seals: FKM, FFKM, EPDM, or PTFE O‑rings for chemical compatibility.

FFGD Single Cartridge Mechanical Seal is a pre‑assembled, self‑contained single‑face mechanical seal engineered specifically for Sulzer MSD axially split multistage pumpsSulzer. It is purpose‑built to deliver reliable shaft sealing in high‑pressure, high‑temperature, and demanding process services, aligning with the operational requirements of Sulzer's MSD pump series (BB3 type)

Key Features

Cartridge‑style integration: Pre‑mounted as a complete unit with shaft sleeve, seal gland, rotating assembly, stationary seat, springs, O‑rings, and fasteners-no on‑site assembly or adjustment required.
Self‑alignment & centering: Built‑in locating clips ensure precise radial and axial positioning during installation.
Spring‑loaded compensation: Maintains consistent face loading to compensate for wear, shaft movement, and thermal expansion.

Advantages

High reliability for MSD pumps: Engineered for Sulzer MSD's high‑speed (up to 6,000 rpm) and high‑pressure multistage serviceSulzer.

Leakage control: Low‑emission single‑face design; compatible with API 682 flush plans (Plan 11, 21, 32) for cooling and flushing.

Shaft protection: Integrated shaft sleeve prevents wear and damage to the MSD pump shaft.

Easy installation & maintenance: Pre‑set cartridge design cuts installation time; eliminates measurement errors; simplifies seal replacement without pump disassembly.