171 Series Seals
Category:National Standard Series
1. Internal single-end mechanical seal,
2. Multi-spring static type,
3. Balanced type
Detailed introduction
The 171 series mechanical seal is a high-performance single-face sealing solution renowned for its high reliability, long service life, and ease of maintenance. Specifically designed for complex operating conditions involving solid particles and prone to clogging, it is suitable for industrial pump equipment across multiple industries and offers stable, durable sealing performance.
✅ 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 ≤ 10 m/s. For shaft diameters ≤ 100 mm, the axial runout is ±0.5 mm; for shaft diameters > 100 mm, it is ±2.0 mm.
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.
Long-term stable operation: Cleverly designed to suit continuous operation, with low leakage. The pump and seal can last over 10,000 hours, significantly reducing the frequency of downtime and maintenance.
✅ Structural features
Compact internal design: Directly installed inside the pump shaft’s inner diameter, compatible with standard seal chambers, saving installation space.
Multi-spring static balancing structure: The multi-spring design enhances sealing stability. The spring-static design prevents rotation along with the shaft, thereby reducing wear. The balanced structure lowers the specific pressure on the end faces, minimizing frictional heat and wear, making it suitable for medium- and low-pressure operating conditions.
Reliable transmission assurance: Using a fork or keyway transmission ensures that the moving ring rotates in synchronization with the shaft, eliminating any risk of slippage and providing more stable operation.
✅ Applicable scenarios
Chemical Industry: Reactor vessels and transfer pumps for processes involving sulfuric acid, hydrochloric acid, chlor-alkali, and other chemicals—capable of withstanding corrosive media and slurry containing particulates.
Environmental protection industry: Equipment such as clear water pumps, sewage pumps, and submersible pumps, suitable for media containing fibers and with high viscosity.
Papermaking Industry: Equipment Specifically Designed for Handling Fiber-Containing, High-Viscosity Media
Other sectors—such as power, water conservancy, iron and steel, coal chemical industry, fertilizer production, and aluminum smelting—should be equipped to handle complex operating conditions involving solid particles and media prone to crystallization.
🔥 Preferred Sealing Solutions for Complex Operating Conditions
The 171 series mechanical seals, with their balanced design and long service life, effectively address sealing challenges in applications involving particulate matter and prone to clogging. They are widely used in critical equipment across multiple industries, ensuring stable and reliable production operations.
Applicable host
Product Features
Use parameters
1. Medium: Oil, water, non-crystalline alkalis, and other slurries
2. Operating pressure: 0~1.6 MPa
3. Operating temperature: -20~150°C
4. Linear velocity: ≤15 m/s
Keywords：171 Series Seals
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The 171 series mechanical seal is a high-performance single-face sealing solution renowned for its high reliability, long service life, and ease of maintenance. Specifically designed for complex operating conditions involving solid particles and prone to clogging, it is suitable for industrial pump equipment across multiple industries and offers stable, durable sealing performance.
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152 Series Seals (Corrosion-Resistant Pumps)
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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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