108 Series Mechanical Seal Ring

The 108 series mechanical seal ring is a single-end face, multi-spring, balanced type mechanical seal that complies with international general standards. It is widely used in the shaft sealing systems of various centrifugal pumps, chemical pumps, process pumps, and other rotating equipment. As a key component for preventing the leakage of the medium inside the pump along the pump shaft, this series of seals, with its standardized design, reliable sealing performance, wide media adaptability, and excellent cost-effectiveness, has become the preferred solution for replacing old packing seals and upgrading the sealing level of pump equipment. It is a core consumable part in industrial fluid transportation systems that ensures safe, environmentally friendly, and efficient operation.

Standardized and reliable design
General interface: Designed strictly in accordance with ISO, GB and other standard sizes, the installation dimensions are compatible with mainstream pump types worldwide (such as ISO standard pumps), highly interchangeable, and facilitate quick selection and replacement.
Balanced structure: Adopting a balanced design can effectively reduce the pressure on the sealing end face, reduce friction heat and wear, and significantly extend the service life under higher pressure conditions.
Outstanding sealing performance and durability
High-performance end face materials: The friction pairs of the moving and static rings can be selected in various combinations such as silicon carbide (SiC)/silicon carbide, silicon carbide/graphite, hard alloy/graphite, etc., based on the characteristics of the medium. These materials have high hardness, good wear resistance, and strong corrosion resistance, and can withstand harsh conditions.
Multi-spring design: Multiple small springs are evenly arranged to provide a stable and balanced end face pressure, with strong compensation capability, good adaptability to shaft deflection and vibration, and more reliable sealing.
Elastic elements: Auxiliary sealing rings (O-rings, V-rings, etc.) are usually made of fluororubber (FKM/Viton®), nitrile rubber (NBR), ethylene propylene rubber (EPDM), etc., which can withstand various oils, weak acids and weak bases, and a certain temperature range.
Wide range of media and working conditions adaptability
Wide range of media: Suitable for water, oil, weakly corrosive chemical media, light hydrocarbons, and other clean or liquids containing trace particles.
Wide range of working conditions: The design pressure can usually reach 0 - 2.0 MPa, and the temperature range is -20°C to +220°C (depending on the material of the sealing ring), capable of meeting the needs of most general industrial pumps.

General Industrial Water Supply and Circulation Water System
Industrial cooling pumps, boiler feed pumps, circulation pumps, fire pumps, etc., used for clean water or treated industrial water.
Chemical and Process Industry
Various chemical process pumps, metering pumps, for transporting non-strongly corrosive and non-toxic media such as dilute acids, alkalis, alcohols, solvents, etc.
Petroleum and Petrochemicals
Crude oil transfer pumps, light hydrocarbon pumps, finished oil pumps, suitable for gasoline, diesel, lubricating oil, etc. oil products.
Heating, Ventilation, and Air Conditioning (HVAC) and Heating
Heating circulation pumps, cooling water pumps, air conditioning cooling water pumps.
Wastewater Treatment and Environmental Protection
Wastewater lift pumps, reclaimed water pumps (treated water), recommended to use hard end face materials with strong particle resistance.

Key selection parameters: medium type, temperature, pressure, pH value, whether containing particles, pump shaft diameter, rotational speed.
Unsuitable scenarios: highly corrosive, highly oxidizing, high viscosity, media containing a large amount of solid particles or prone to crystallization, in which case a more specialized heavy-duty or double-end face seal should be selected.
Service life: Under correct selection, installation, and good operating conditions, the service life usually reaches 8,000 - 16,000 operating hours.

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