106 Series Seals
Category:National Standard Series
1. Internal single-end mechanical seal,
2. External spring
3. Non-equilibrium type
Detailed introduction
The 106 series mechanical seals represent a cost-effective, standard sealing solution for industrial applications. Featuring three core structural components—external springs, static ring compensation, and an internal design—they strike an ideal balance between performance and ease of maintenance. These seals can operate reliably over extended periods even under harsh operating conditions, making them the preferred choice for both import substitution and as original equipment manufacturer (OEM) replacement parts.
✅ Core Parameters and Performance
Operating parameters: Pressure ≤ 1.6 MPa (some specifications reach 2.5 MPa); temperature -20℃ to 150℃ (some specifications reach 200℃); linear velocity ≤ 20 m/s; suitable for medium- and high-pressure complex operating conditions.
Corrosion- and wear-resistant configuration: The friction pair can be optionally configured with silicon carbide/graphite or tungsten carbide/tungsten carbide combinations, while the substrate is made of stainless steel, enabling it to withstand moderately corrosive media such as water, oils, acids, alkalis, salts, and organic solvents.
High reliability and low leakage: Ingeniously designed to suit continuous operation, featuring stable performance with no failures, low leakage rates, and meeting the sealing requirements of demanding operating conditions.
✅ Structural features
Compact internal design: Directly installed within the pump shaft’s inner diameter, compatible with standard seal chambers, saving equipment installation space.
External spring isolation: The spring assembly is located outside the media flow path, completely isolating it from corrosion, blockage, and scaling, thereby significantly extending the service life of the elastic components.
Static ring axial compensation: Automatically adapts to thermal expansion, vibration, and shaft misalignment of the equipment, maintaining stable contact between sealing surfaces and reducing wear.
Reliable transmission assurance: Fork or keyway transmission ensures that the moving ring rotates in synchronization with the shaft, eliminating the risk of slippage and providing more stable operation.
✅ Applicable scenarios
Chemical process pumps: Reactor vessels and transfer pumps for sulfuric acid, hydrochloric acid, caustic soda, and chlor-alkali processes, capable of withstanding highly corrosive liquids.
Power plant desulfurization system: Dedicated to absorption tower slurry circulation pumps and gypsum discharge pumps, designed to handle high-solid-content gypsum and lime slurries.
Pharmaceutical and biotechnology sector: Non-sterile reaction systems that meet CIP cleaning requirements and eliminate cross-contamination.
Papermaking wastewater treatment: Seals for pulp pumps and sludge pumps, suitable for media with high fiber content and high viscosity.
Alumina industry: Specifically designed for alkali solution circulation pumps, resistant to erosion by high-concentration sodium hydroxide solutions.
🔥 Preferred Sealing Solutions for Process Industries
The 106 series mechanical seals, originally designed as standard seals for process pump systems, are widely used in critical rotating equipment across the global process industry. With their high stability and cost-effectiveness, they have become the ideal choice for companies seeking to achieve import substitution and control operational and maintenance costs.
Applicable host
Product Features
Use parameters
1. Media: Oil, water, non-crystalline weak acids, bases, and organic solvents
2. Operating pressure: 0~1.6 MPa
3. Operating temperature: -20~150°C
4. Linear velocity: ≤20 m/s
Keywords：106 Series Seals
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The 106 series mechanical seals represent a cost-effective, standard sealing solution for industrial applications. Featuring three core structural elements—external springs, static ring compensation, and an internal design—they strike an ideal balance between performance and ease of maintenance. These seals can operate reliably over extended periods even under harsh operating conditions, making them the preferred choice for import substitution as well as for original equipment manufacturer (OEM) spare parts.
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Seal Support Systems
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Plan 23
Core positioning: A single-face seal self-flushing solution specifically designed for hot-water pumps. The medium is guided out of the self-sealing cavity, cooled, and then returned to the sealing face, achieving integrated self-circulation for flushing and cooling without the need for additional medium replenishment.
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Plan 53A
Reason for adoption: Isolate the process fluid. Zero discharge of the process fluid.
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Plan 53B
Reason for adoption: Isolation of process liquids; zero discharge of process fluids; pressure exceeding the 53A scheme.
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Plan 53C
Reason for adoption: Isolate the process fluid. Achieve zero discharge of the process fluid. Pressure exceeds the 53A design specification. Dynamically monitor system pressure.
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