Seals & Packing
Mechanical Seals
Rotary & Stationary Seal Assemblies
We supply mechanical shaft seals for centrifugal pumps, mixers, agitators, and other rotating equipment in single, double (dual), and cartridge configurations. Face materials range from carbon-graphite and silicon carbide to tungsten carbide. Getting the face pairing right matters: the wrong combination in abrasive slurry will wear through in weeks.
Types & Variants
Single Seals
Standard configuration with one set of sealing faces. Suited to most clean-water and general-duty pump applications.
Double (Dual) Seals
Two seal faces in series with a barrier or buffer fluid between them. Required for hazardous, toxic, or zero-emission service.
Cartridge Seals
Pre-assembled, pre-set units that install as one piece. Takes the guesswork out of setting the seal face gap, which is a common source of premature failure with component seals.
Component Seals
Individual seal faces, O-rings, springs, and drive components for rebuilding existing seal assemblies.
Common Applications
Water & Wastewater Pumps
Centrifugal pumps in treatment plants, lift stations, and distribution networks.
Chemical Process Pumps
ANSI and ISO chemical-duty pumps handling corrosive, abrasive, or hazardous media.
Mixers & Agitators
Shaft seals for side-entry and top-entry mixers in tanks and reactors.
Materials & Standards
Materials
- Carbon-graphite (antimony impregnated)
- Silicon carbide (SiC), reaction-bonded and sintered
- Tungsten carbide (WC)
- Alumina ceramic
- Viton, EPDM, PTFE secondary seals
- Stainless steel, Hastelloy hardware
Standards
- API 682 / ISO 21049 — Pumps, shaft sealing systems
- EN 12756 — Mechanical seals, principal dimensions
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Pump make and model, shaft size, process conditions: that's our starting point. We supply new seals and carry rebuild components for most major brands.
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This page is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.