Bogman H74D Series
Category:National Standard Seal Series
1. Double-end face mechanical seal,
2. Multi-spring
3. Non-equilibrium type
Detailed introduction
✅ Core Parameters and Performance
Operating parameters: Pressure ≤ 2.5 MPa (some specifications reach 4.0 MPa); temperature -50℃ to 220℃; linear velocity ≤ 20 m/s; shaft diameter 14–200 mm; when d1 ≤ 100 mm, the axial runout is ±0.5 mm; when d1 > 100 mm, the axial runout is ±2.0 mm.
Multi-material compatibility: The sealing face can be configured with combinations such as silicon carbide/graphite or tungsten carbide/tungsten carbide, offering excellent corrosion and wear resistance. The auxiliary seal can be equipped with nitrile rubber, fluoroelastomer, ethylene-propylene rubber, or PTFE, ensuring precise matching for a wide variety of media.
Stable and Durable: The multi-spring structure enhances sealing stability, while the dual-face design provides double-layer protection, making it suitable for high-risk media such as flammable, explosive, and toxic substances, as well as complex operating conditions.
✅ Structural features
Double-end-face unbalanced type: Dual sealing ensures safety, the structure is streamlined with controllable costs, and it’s suitable for medium- and low-pressure operating conditions.
Arbitrary rotation direction design: Supports forward and reverse rotation of the device, making installation convenient without requiring additional adjustments and reducing the difficulty of model selection.
Multi-spring configuration: Offers excellent operational stability and easily handles harsh conditions involving particulate matter, fibers, and media prone to crystallization.
✅ 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 solid particles.
Power / Water Resources / Steel: Pump Seal for Clear Water, Hot Water, Wastewater, and Media Containing Particles
Papermaking / Coal Chemicals / Fertilizers / Aluminum Production: Equipment for Conveying and Mixing Media Containing Fibers and with High Viscosity
🔥 A cost-effective choice for sealing in complex operating conditions
The Bogman H74D series, featuring dual-face sealing and a multi-spring stabilization structure, effectively addresses the sealing challenges posed by media that are prone to crystallization or contain particulates. Widely used in critical equipment across multiple industries, this series strikes an ideal balance between performance and cost, making it the perfect sealing solution for complex operating conditions.
Applicable host
Product Features
Use parameters
1. Medium: Oil, water, and other mildly corrosive liquids
2. Operating pressure: 0~2.5 MPa
3. Operating temperature: -50~220°C
4. Linear velocity: ≤20 m/s
Keywords：Bogman H74D Series
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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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