152 Series Seals (Corrosion-Resistant Pumps)
Category:National Standard Series
1. External single-end mechanical seal,
2. Balanced type
3. Multi-spring
Detailed introduction
The 152 series mechanical seal is specially designed for corrosive pump applications. Its core architecture features a PTFE bellows plus an externally mounted single-face design, offering outstanding resistance to crystallization and anti-blocking performance. It is easy to maintain and low in cost, making it a highly cost-effective alternative to imported seals in industries such as chemical processing and environmental protection.
✅ Core Parameters and Performance
Operating parameters: Pressure ≤ 0.5 MPa (balanced design suitable for medium- and low-pressure applications); temperature range: -20℃ to 120℃ (special materials can withstand up to 300℃); linear velocity ≤ 15 m/s; axial runout ±0.5 mm.
Highly Corrosion-Resistant Configuration: The friction pair can be configured with combinations of silicon carbide, tungsten carbide, aluminum oxide, or PTFE. Metal components are made of 304 stainless steel or Hastelloy, providing excellent resistance to strong corrosive media such as acids, alkalis, and salts.
Anti-crystallization and anti-sticking: The spring is externally mounted or designed with a PTFE bellows, completely isolating the elastic element from the medium and preventing seal failure caused by crystallization-induced blockage.
High Reliability and Long Service Life: Long design life, low leakage rate, and extended maintenance intervals, effectively reducing equipment downtime frequency.
✅ Structural features
Externally mounted single-face seal: The sealing assembly is located externally, allowing inspection and replacement without disassembling the pump, thereby significantly reducing maintenance time and costs.
PTFE corrugated tube auxiliary seal: corrosion-resistant, high-temperature resistant, capable of compensating for axial runout, and effectively preventing seal failure caused by medium crystallization at the source.
Multi-spring protective design: The springs are isolated and protected by a bellows, preventing direct contact with the medium and thereby extending the service life of the elastic elements.
Balanced and stable operation: Uniform end-face specific pressure, suitable for applications involving corrosive media, ensuring smoother operation.
Flexible installation with no rotational direction restrictions: The transmission base design supports both forward and reverse rotation of the device, eliminating the need for additional adjustments during installation.
✅ Applicable scenarios
Typical media: corrosive liquids such as sulfuric acid, hydrochloric acid, nitric acid, caustic soda, chlor-alkali process solutions, organic solvents, and media with solid content ≤ 2%.
Industries covered: Chemical industry—reactors and transfer pumps; environmental protection—acid and alkaline wastewater treatment, desulfurization and denitrification systems; pharmaceutical and food industries—non-sterile-grade reaction systems; papermaking industry—pulp pumps and sludge pumps for wastewater treatment.
🔥 Preferred Sealing Solution for Highly Corrosive Service Conditions
The 152 series mechanical seals, with their core advantages of anti-crystallization and maintenance-free pump operation, are perfectly suited to meet the sealing requirements for highly corrosive media across multiple industries. Their performance is comparable to that of imported products, making them an ideal choice for enterprises seeking to reduce costs and improve efficiency.
Applicable host
Product Features
Use parameters
1. Medium: Oil, water, and other mildly corrosive liquids
2. Operating pressure: 0~1.5 MPa
3. Operating temperature: -20~120°C
4. Linear velocity: ≤15 m/s
Keywords：152 Series Seals (Corrosion-Resistant Pumps)
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152 Series Seals (Corrosion-Resistant Pumps)
The 152 series mechanical seal is specially designed for corrosive pump applications. Its core architecture features a PTFE bellows plus an externally mounted single-face design, offering outstanding resistance to crystallization and anti-clogging performance. It is easy to maintain and low in cost, making it a highly cost-effective alternative to imported seals in industries such as chemical processing and environmental protection.
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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