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OEM and Special Duty Seals - PSS 4

BRAND: Flowserve

Advanced technology semi-cartridge split seal for pump and mixer applications. The PSS 4 split seal, with intrinsic joint alignment technology, provides the easiest and most successful installation routine to make reduced equipment downtime and increased reliability... routine.


  • General Industry
  • Chemicals
  • Water
  • Oil & Gas
  • Power

industry sectors

  • Pulp & Paper
  • Mining
  • Steel & Primary Metals
  • Food & Beverage
  • Corn Wet Milling & Ethanol
  • Basic (Organic & Inorganic)
  • Specialty (Fine & Consumer)
  • Biofuels
  • Pharmaceutical
  • Water
  • Waste Water
  • Agriculture
  • Water Management
  • Upstream Exploration & Production
  • Downstream Processing
  • Nuclear
  • Conventional Steam
  • Geothermal
  • Combined Cycle
  • Concentrated Solar Power (CSP)
  • Biomass and MSW
Operating Parameters

Full vacuum to 30 bar (450 psi), -18° to 121°C (250°F), up to 19.3 m/s (3800 fpm), 38 to 152 mm (1.500 to 6.000 inch)

Design Range

Size Range: 1.500" to 6.000

Features & Benefits
  • Exclusive 3D Key technology assures optimum face alignment in both axial and radial direction, reducing leakage and installation time.
  • Unique setting tabs optimally position the rotating face for installation while eliminating all seal positioning, measuring and marking, further assuring first time/every time installation success.
  • Easily handles mixer equipment runout up to1.5 mm (0.060 inch) TIR radial shaft movement, accommodating demanding mixer characteristics.
  • Fully split designs installs easily around the shaft, outside of the seal chamber, eliminating the need to dismantle the equipment for seal installation.
  • Easy installation made even easier with fully pre-assembled, unitized component, semi-cartridge design.

This video provides a general overview of the PSS 4 installation process. Prior to beginning, it is important to read the installation manual in its entirety and ensure compliance with all applicable safety and equipment lockout procedures.


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