Bogerman M74D Series
Category:National Standard Seal Series
1. Double-end face mechanical seal,
2. Multi-spring
3. Non-equilibrium type
Detailed introduction
The Bogman M74D series mechanical seals are specially designed for applications involving particulate-laden, easily crystallizing, and fibrous media. They feature a dual-face, non-balanced design with a multi-spring configuration, making them ideal for medium- and low-pressure environments. Their installation dimensions (excluding the drive housing) comply with DIN 24960 standards, offering high versatility and serving as a high-performance sealing solution for industrial pumps handling complex media.
✅ Core Parameters and Medium
▶ Operating parameters: Pressure ≤ 2.5 MPa, temperature -50℃ to 220℃, linear velocity ≤ 20 m/s; suitable for medium- and low-pressure complex operating conditions.
▶ Material specifications: The sealing end faces can be made of graphite, silicon carbide, tungsten carbide, and other materials; auxiliary seals include nitrile rubber and fluororubber; metal components are made of stainless steel, offering corrosion resistance, wear resistance, and compatibility with multiple media.
▶ Specifications and axial play: Shaft diameter ranges from 18 to 200 mm. When d1 ≤ 100 mm, the axial play is ±0.5 mm; when d1 > 100 mm, the axial play is ±2.0 mm.
✅ Core Features
▶ Dual-end-face protection: Double sealing ensures enhanced safety and is suitable for complex media that are prone to crystallization or contain particles/fibers.
▶ Cost-effective design: The unbalanced structure is simple and cost-controlled; multiple springs enhance sealing stability, making it suitable for medium- and low-pressure applications.
✅ Structural features
▶ Core structure: Double-end face, unbalanced design with multi-spring configuration, compatible with any rotation direction for stable and reliable operation;
▶ Strong adaptability: The structure is well-suited to complex media operating conditions, and the installation dimensions are standardized, allowing seamless integration with multi-brand equipment without major modifications.
✅ Applicable scenarios
Specifically designed for applications involving crystallizable, particulate-laden, and fibrous media; covering industries such as chemical processing (acids/alkalis/salts and particle-containing slurries), power/water resources/steel (clear water/hot water/wastewater), and pulp & paper/coal chemical industry/fertilizer production/aluminum production (including fibrous and high-viscosity media).
🔥 Preferred Sealing Solutions for Complex Operating Conditions
The Bogman M74D series features a dual-face, multi-spring design as its core, balancing sealing reliability with cost control. It offers exceptional value in medium- and low-pressure applications involving complex media. Widely compatible with equipment across multiple industries, this series effectively addresses sealing challenges posed by media prone to crystallization or containing particulates, making it the ideal choice for demanding operating conditions.
✅ Selection and Application Recommendations
▶ Key selection criteria: Precisely match the pump model, shaft diameter, medium characteristics (crystallinity, solid content), and operating parameters.
▶ Installation highlights: Ensure the mounting surface is clean and properly aligned; strictly adhere to dimensional standards, and avoid forcing installation to prevent damage to the sealing surfaces.
▶ Maintenance and upkeep: Regularly inspect the sealing performance and media compatibility, and promptly replace worn parts to ensure stable operation.
Applicable host
Product Features
Use parameters
1. Medium: Oil, water, and other mildly corrosive liquids
2. Operating pressure: 0~2.5 Pa
3. Operating temperature: -50~220°C
4. Linear velocity: ≤20 m/s
Keywords：Bogerman M74D 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
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