WB2 Series Seals (Corrosion-Resistant Pumps)
Category:National Standard Series
1. External single-end mechanical seal,
2. Balanced type
Detailed introduction
The WB2 series mechanical seal is an economical, practical, and reliably performing industrial sealing solution. Its core design features a PTFE bellows combined with an externally mounted single-face seal, making it suitable for a wide range of corrosive media applications. Customized configurations are available upon request. This seal represents a cost-effective alternative to imported seals in industries such as chemical processing and environmental protection.
✅ Core Parameters and Performance
Operating Condition Compatibility: Pressure ≤ 0.5 MPa, Linear Velocity ≤ 10 m/s, Temperature -20℃ to 70℃ (special materials can withstand up to 300℃).
Corrosion-resistant configuration: The friction pair is made of silicon carbide/graphite or tungsten carbide/tungsten carbide, with a base material of 316 stainless steel or Hastelloy, capable of withstanding highly corrosive media such as acids, alkalis, salts, and organic solvents.
Solid-content compatibility: The standard model is suitable for media with a solid content of ≤2%, free of hard particles, and not prone to rapid solidification; the enhanced model (made of SiC material) can handle media containing trace amounts of particles.
Cooling-free design: Eliminates the need for cooling water, reducing equipment installation costs and simplifying operation and maintenance procedures.
✅ Structural features
Externally mounted single-face seal: The sealing assembly is located externally, offering an intuitive structure that makes it easy to observe leakage conditions and simplifies daily inspection and replacement.
PTFE bellows: Combines spring compensation and anti-crystallization functions, accommodates axial and radial shaft runout, and prevents seal failure caused by medium crystallization.
Non-rotating-direction transmission: Driven by the transmission base, ensuring that the moving ring rotates synchronously with the shaft, with no restrictions on forward or reverse rotation and easy installation.
Automatic compensation of the stationary ring: The stationary ring floats axially, automatically compensating for wear and maintaining optimal contact between sealing surfaces, thereby extending service life.
✅ Applicable scenarios
Typical media: corrosive liquids such as sulfuric acid, hydrochloric acid, nitric acid, caustic soda, chlor-alkali process solutions, and organic solvents.
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—wastewater treatment, pulp pumps, and sludge pumps.
🔥 Preferred Sealing Solution for Highly Corrosive Service Conditions
The WB2 series mechanical seals, with their core advantages of anti-crystallization and ease of maintenance, are perfectly suited to meet the sealing requirements for highly corrosive media across multiple industries. The product line covers various specifications, including WB2 (152), and supports non-standard customization, making it an ideal choice for companies looking to reduce costs and improve efficiency.
Applicable host
Product Features
Use parameters
1. Medium: Corrosive liquid free of suspended particles
2. Operating pressure: 0~0.5 MPa
3. Operating temperature: -20℃ ~ 70℃
4. Linear velocity: ≤10 m/s
Keywords：WB2 Series Seals (Corrosion-Resistant Pumps)
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The WB2 series mechanical seal is an economical, practical, and reliably performing industrial sealing solution. Its core design features a PTFE bellows combined with an externally mounted single-face seal, making it suitable for a wide range of corrosive media applications. Customized configurations are available upon request. This seal represents a cost-effective alternative to imported seals in industries such as chemical processing and environmental protection.
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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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