M74N Series Seals
Category:National Standard Series
1. Internal single-end mechanical seal,
2. External spring,
3. Non-equilibrium type
Detailed introduction
✅ Core Performance
Corrosion- and wear-resistant configuration: The sealing faces can be configured with combinations such as silicon carbide/graphite or tungsten carbide/tungsten carbide; the substrate is made of stainless steel, providing resistance to moderately corrosive media including water, oils, acids, alkalis, salts, and organic solvents.
High reliability and anti-clogging: The floating stationary ring automatically compensates for wear, and the push-ring retaining spring prevents detachment—particularly well-suited for applications involving particulate-containing media.
✅ Structural features
Single-end face balanced type: Optimizes end-face specific pressure, reduces frictional heat and wear, and is suitable for medium-to-low pressure to high-pressure operating conditions.
Arbitrary rotation direction design: Supports forward and reverse rotation of the device, with no directional restrictions during installation, making assembly quick and efficient.
External spring isolation: The spring assembly is located outside the media flow path, completely isolating it from corrosion, blockage, and scaling, thereby extending the service life of the elastic components.
Static ring axial compensation: Automatically adapts to thermal expansion, vibration, and shaft misalignment, ensuring stable contact between sealing surfaces and guaranteeing long-term operational reliability.
✅ 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.
Oil refining: Equipment for handling corrosive media containing solid particles, crystalline substances, or high-viscosity materials
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
🔥 Preferred Sealing Solutions for High-Pressure and Complex Operating Conditions
The Bogman M74N series, with its balanced design, floating stationary ring, and externally mounted spring, effectively addresses the sealing challenges posed by high-pressure, particle-laden, corrosive media. It is widely used in industries such as chemical processing and petroleum refining, ensuring the stable operation of critical equipment.
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: -40~220°C
4. Linear velocity: ≤15 m/s
Keywords：M74N Series Seals
Related Recommendations
Desulfurization Pump Seal Series
-
Xiangyang 525 Pump Industry HTM Series Desulfurization Pump
Key selling points: Sulfur removal-specific + Two models available + Wear-resistant and corrosion-resistant + Ultra-long service life + Easy installation
-
Xiangyang 525 LC Pump Series – ZDT Series
Key selling points: Specifically designed for efficient desulfurization + wear-resistant and corrosion-resistant + ultra-long service life + easy installation
-
Xiangyang 525 LCF Desulfurization Pump Series
Key selling points: Specially designed for desulfurization + wear-resistant and corrosion-resistant + ultra-long service life + easy installation
-
Shandong Shuanglun SLTX Desulfurization Pump Series
Key selling points: Wear and corrosion resistance + ultra-long lifespan + easy installation
-
Shandong Shuanglun SLJY Desulfurization Slurry Pump Series
Key selling points: Wear-resistant and corrosion-resistant + Ultra-long lifespan + Easy installation
-
Shandong Shuanglun LRB Circulation Pump Series
Key selling points: Two models available + wear- and corrosion-resistant + ultra-long lifespan + easy installation
-
Shijiazhuang Industrial Pump—50DT-A30 Desulfurization Pump—SJZ Series
Key selling points: Multiple specifications available + Compatible with various pump manufacturers + Specifically designed for FGD desulfurization + Wear-resistant and corrosion-resistant + Ultra-long service life
-
Shijiazhuang Industrial Pump 65DT-A30 Desulfurization Pump—SJZ Series
Key selling points: Multiple specifications available + Compatible with various pump manufacturers + Specifically designed for FGD desulfurization + Wear-resistant and corrosion-resistant + Ultra-long service life
Slurry Pump Seal Series
-
Shandong Shuanglun ZWB Slurry Pump and Xiangyang 525 IHE Desulfurization Pump Series Seals
Medium: Slurry, particle-containing liquid; Concentration: ≤40%
-
Xiangyang 525 Slurry Pump Series
Key selling points: Multiple specifications available + specially designed for chemical applications + wear-resistant and corrosion-resistant + ultra-long service life + easy installation
-
Dongfang Xiwang ZDW Slurry Pump Series
Key selling points: Double-end face sealing + auxiliary impeller synergy + self-circulating cooling + patented wear resistance
-
Xiangyang 525 BBS Slurry Pump Series
Key selling points: Double-end face sealing + auxiliary impeller synergy + self-circulating cooling + patented wear resistance
-
Shijiazhuang Qiangda ZGB Slurry Pump Series
Key selling points: Multiple structural options + Easy installation + Balanced design + Wear-resistant and corrosion-resistant + Ultra-long lifespan
-
Shijiazhuang Industrial Pump SJZ Slurry Pump Series
1. Medium: Slurry, fly ash, and other mildly corrosive liquids with a solid content ≤ 40% 2. Temperature: 0–180°C 3. Pressure: 0–1.5 MPa 4. Linear velocity: ≤ 10 m/s
-
Shandong Zhangqiu Drum YZS Slurry Pump Series
Key selling points: Double-end face sealing + auxiliary impeller synergy + self-circulating cooling + patented technology + high-chromium wear resistance
-
Shandong Zhangqiu Drum ZJ Slurry Pump Series
Key selling points: Small-size design + load balancing + pre-assembled integration + easy installation + wide applicability
-
Shandong Zhangqiu Drum TZJ Slurry Pump Series / YTZ Series
Key selling points: Exclusive to Shandong Zhanggu | Designed specifically for slurry pumps | Self-circulating cooling | High-chromium wear resistance | Leak-free
-
Shandong Jutai LZA Slurry Pump Series
Key selling points: Double-end face sealing + auxiliary impeller synergy + self-circulating cooling + patented wear resistance
-
Shandong Jutai LZB Slurry Pump Series
Key selling points: Double-end face sealing + auxiliary impeller synergy + self-circulating cooling + patented wear resistance
-
Shandong Jutai BB Filter Press Feed Pump Series
Key selling points: Single/dual end faces available + premium materials + wear- and corrosion-resistant + ultra-long lifespan + wide compatibility
Reactor Seal Series
-
202 Series
Key selling points: Single-end small spring + reliable sealing + compact structure + 202B long-life type
-
203 Series
Key selling points: Single-end face balancing structure + corrosion and wear resistance + high-pressure compatibility + easy installation
-
204 Series
Key selling points: Multiple models available + Easy installation + Wide applicability + Reliable sealing + Long service life
-
205 Series
Key selling points: Dual-end multi-spring design + compatible with special media + high-temperature resistance + reliable sealing
-
206 Series
Key selling points: Double-end face balanced structure + Adaptability to hazardous media + Multi-spring stable sealing + Customized materials
-
207 Series
The Model 207 reactor mechanical seal is custom-designed for applications with extremely high performance requirements! It is suitable for handling flammable, explosive, toxic, and highly corrosive media, and is widely used in industries such as chemical processing, pharmaceuticals, and petroleum—areas that demand exceptionally high sealing performance.
-
212 Series
Key selling points: Exclusive for enameled glass reactors + Single-end face balancing + Suitable for hazardous media + Customized materials + Reliable sealing
-
Bogerman M46
Key selling points: Balanced structure + Multiple material options + Standardized design + High reliability
Agitator/Mixer Seal Series
-
American Sharp SHARPE Series Seals
Key selling points: High-quality silicon carbide + Modular, easy installation + Ultra-long lifespan + Compatible with multiple operating conditions
-
American Lining VSF Series Seals
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Highly reliable
-
German EKATO ESD Series
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Available in multiple specifications to suit various needs
-
German Icato-MUT Series
Medium: High-concentration medium containing impurities such as gypsum and lime slurry (≤30% solids content)
-
Satik SDK Series
Key selling points: High corrosion resistance, high solids content and compatibility + High temperature and pressure resistance + Long service life with low leakage + Modular design for easy installation
-
Zhejiang Great Wall KY261 Series
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Available in multiple specifications to suit various needs
-
Zhejiang Hengfengtai
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Available in multiple specifications to suit various needs
Chemical Pump Seal Series
-
Shandong Emco SEH Chemical Pump Series
Key selling points: Specifically designed for chemical processes + highly corrosion- and wear-resistant + resistant to high temperatures and pressures + low leakage with long service life + modular and easy to install.
-
John Crane 58U Series
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Available in multiple specifications to suit various needs
-
John Crane 58B Series
Key selling points: Specifically designed for desulfurization applications + Highly resistant to corrosion and abrasion + Modular and easy to install + Available in multiple specifications to suit various needs
-
C8U-Series
Key selling points: High corrosion and wear resistance + Wide temperature and pressure compatibility + Long service life with low leakage + Balanced modular design
-
C8B-Series
Key selling points: High corrosion and wear resistance + Wide temperature and pressure compatibility + Long service life with low leakage + Balanced modular design
-
Shanghai Liancheng SLW Centrifugal Pump Series Seals
The SLW centrifugal pump series mechanical seals are specially designed for highly corrosive, high-abrasion chemical and desulfurization environments! They are suitable for harsh operating conditions across multiple industries, offering reliable sealing performance and hassle-free installation—making them the preferred sealing solution for industrial applications.
-
Shanghai Liancheng SL Centrifugal Pump Series Seals
The Shanghai Liancheng SL centrifugal pump series mechanical seals are specially designed for highly corrosive, high-abrasion chemical and desulfurization environments, precisely tailored to meet the specific requirements of SL centrifugal pumps! These seals offer reliable performance and hassle-free installation, making them the preferred solution for harsh industrial operating conditions.
-
Shanghai Liancheng SLS Centrifugal Pump Series Seals
The Shanghai Liancheng SLS centrifugal pump series mechanical seals are specially designed for highly corrosive, highly abrasive chemical and desulfurization environments. They precisely match the requirements of SLS centrifugal pumps, offering reliable sealing performance and hassle-free installation, making them well-suited for harsh industrial operating conditions.
-
Mechanical Seal for ZB Series Chemical Pumps
The ZB series mechanical seals are specially designed for flue gas desulfurization environments characterized by high corrosion and severe wear. Featuring reliable sealing performance and excellent adaptability, they represent the optimal solution for harsh industrial operating conditions.
-
ZU Series Chemical Pump Mechanical Seal
The ZU series mechanical seals are specially designed for highly corrosive, highly abrasive chemical and desulfurization environments. Featuring reliable sealing performance and broad versatility, they represent the optimal solution for harsh industrial operating conditions.
-
Dalian Shenlan ANS-K Chemical Pump Series
Medium: Oil, water, and other mildly corrosive liquids
-
Dalian Shenlan ZN3 Series Seals
-
Sulzer JCS2P Series – A3, A4, A5 Series
The Sulzer JCS2 series mechanical seals are domestically produced shaft seals specifically designed for the extreme operating conditions of papermaking pressure screens. Leveraging their core structural design and domestic production advantages, these seals are well-suited to high-wear applications across multiple industries, making them the mainstream choice for enterprises seeking seal upgrades.
-
Sulzer APP Series
Key selling points: Single or double-end face options + Premium materials + Wear-resistant and corrosion-resistant + Ultra-long service life + Wide compatibility
-
Zigong Industrial Pump – ZBG Chemical Pump Series
The ZBG series mechanical seals are custom-designed specifically for the desulfurization markets both domestically and internationally. They feature technology that rivals that of international brands and are manufactured locally in Zigong, Sichuan (e.g., as配套 components for Zigong industrial pumps). With their excellent cost-performance ratio, these seals are well-suited to harsh operating conditions across a wide range of industries, serving as a reliable alternative to imported seals.
Forced Circulation Pump Seal Series
-
Shandong Shuanglun SLTX Desulfurization Pump Series
The Shandong Shuanglun SLTX series mechanical seals are specially designed for flue gas desulfurization environments in coal-fired power plants. They represent a high-performance sealing solution ideally suited for applications involving high solid content and severe wear conditions. Their performance is on par with international brands, making them a reliable alternative to imported seals.
-
SWB Series Circulation Pumps
Medium: Suitable for industrial circulating water cooling systems (including 5% ethylene glycol antifreeze), fine chemical circulation systems (including organic solvents), and more.
Boiler Feed Water Pump Series
-
Bogman 12SB-J/25SB-J Boiler Feed Pump Series Mechanical Seals
The Bogman 25SB-J series is a high-performance mechanical seal specifically designed for boiler feedwater pumps. It features high-temperature-resistant materials and a highly reliable design, ensuring long-term stable operation under high-temperature and high-pressure conditions. Its modular design simplifies installation and maintenance, making it the ideal sealing solution for boiler feedwater systems.
-
100SB/100SB-JC/100SB-JD/135TSBII-J series
-
Shanghai Liancheng SLOW Circulation Water Pump
Medium: Water (suitable for scenarios such as tap water, circulating water in air conditioners, industrial water supply systems, etc.)
-
Shandong Shuanglun IS-type clear water pump U1001 mechanical seal
The IS pump series mechanical seals are versatile, standard sealing solutions specifically designed for centrifugal pumps. They are renowned for their cost-effectiveness and stable reliability, making them widely suitable for basic sealing applications across numerous industrial sectors.
-
IR condensate pump
The mechanical seals for the IR pump series are industrial sealing solutions specifically designed for applications involving the conveyance of high-temperature and corrosive media. With their core advantages of corrosion resistance and high reliability, these seals are well-suited to harsh operating conditions across multiple industries, making them a cost-effective alternative to imported seals.
National Standard Seal Series
-
Bogman M7N Series
The sealing faces can be configured with combinations of silicon carbide, tungsten carbide, graphite, and other materials, offering excellent corrosion and wear resistance, and suitable for a wide range of complex media.
-
Bogerman M74D Series
The Bogman M74D series mechanical seals are specially designed for applications involving particulate-containing, easily crystallizing, and fibrous media. They feature a dual-face, non-balanced design with a multi-spring configuration, making them suitable 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.
-
Bogman M37G Series
The Bogman M37G series mechanical seal is a single-face, unbalanced sealing solution characterized by its simple structure, reliable performance, and excellent cost-effectiveness. Specifically designed for medium- and low-pressure, moderately corrosive operating conditions, it is suitable for handling complex media across multiple industries, making it a highly cost-effective alternative to imported seals.
-
Bogman H7N Series
Operating parameters: Pressure ≤ 6.0 MPa, temperature resistance: -50℃ to 220℃, linear velocity ≤ 20 m/s; when the shaft diameter is ≤ 100 mm, the axial runout is ±0.5 mm; when the shaft diameter exceeds 100 mm, the axial runout is ±2.0 mm.
-
Bogman H74D Series
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.
-
MG1 Series
Operating parameters: Pressure ≤ 1.6 MPa, temperature -20℃ to 120℃, linear velocity ≤ 10 m/s, suitable for conventional medium- and low-pressure operating conditions.
-
103 Series (for IS pumps)
Corrosion- and wear-resistant materials: The friction pair can be configured with either silicon carbide/graphite or tungsten carbide/tungsten carbide combinations; the substrate is made of stainless steel, providing resistance to water, oils, moderately corrosive liquids, organic solvents, and media containing solid particles.
-
112 Series
The 112 series mechanical seal is a classic single-face, unbalanced sealing solution specifically designed for applications involving clean water, wastewater, and moderately corrosive media. With its compact structure and stable performance, it is well-suited for equipment such as multistage pumps and represents a cost-effective sealing option for industrial and chemical pumps.
-
224 Series
The 224 series mechanical seals feature a dual-face, multi-spring, non-balanced design, specifically engineered for applications involving corrosive media such as in the chemical and water treatment industries. These seals offer reliable sealing performance and high safety, making them the preferred sealing solution for complex medium- and low-pressure operating conditions.
-
BIA Series
The BIA series mechanical seals represent a classic single-face, unbalanced sealing design specifically engineered for applications involving clean water, wastewater, and moderately corrosive media. With their compact structure and stable performance, these seals are well-suited for industrial pumps across a wide range of industries, making them a cost-effective sealing solution.
National Standard Series
-
171 Series Seals
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.
-
M74N Series Seals
Corrosion- and wear-resistant configuration: The sealing faces can be configured with combinations such as silicon carbide/graphite or tungsten carbide/tungsten carbide; the base material is stainless steel, providing resistance to moderately corrosive media including water, oils, acids, alkalis, salts, and organic solvents.
-
169 Series Seals
The 169 series mechanical seal is an externally mounted, single-face sealing solution specifically designed for applications involving highly alkaline media containing crystalline particles. It boasts exceptional wear resistance and corrosion resistance, making it ideally suited for critical equipment in industries such as chlor-alkali and salt production.
-
113 Series Seals
The 113 series mechanical seal is a classic single-face, non-balanced sealing design specifically engineered for applications involving clean water, wastewater, and moderately corrosive media. With its compact structure and stable performance, it is well-suited for equipment such as multistage pumps and represents a cost-effective sealing solution for industrial and chemical pumps.
-
106 Series Seals
The 106 series mechanical seals represent a cost-effective, standard sealing solution for industrial applications. Featuring three core structural elements—external springs, static ring compensation, and an internal design—they strike an ideal balance between performance and ease of maintenance. These seals can operate reliably over extended periods even under harsh operating conditions, making them the preferred choice for import substitution as well as for original equipment manufacturer (OEM) spare parts.
-
WB2 Series Seals (Corrosion-Resistant Pumps)
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.
-
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
-
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.
-
Plan 53A
Reason for adoption: Isolate the process fluid. Zero discharge of the process fluid.
-
Plan 53B
Reason for adoption: Isolation of process liquids; zero discharge of process fluids; pressure exceeding the 53A scheme.
-
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.
Mechanical Seal Product Consultation
Please fill in the following information, and our sealing technology expert will provide you with professional selection advice and solutions within 2 hours.
Get professional sealing solutions
Why choose us?
Professional Technical Support
Our team of technical engineers, with 20 years of experience, provides you with precise seal selection and fault diagnosis services.
Rapid response
We’ll respond to your inquiry within 2 hours, and provide 24-hour technical support for emergency situations.
Quality assurance
All seals are certified under the ISO 9001 quality management system, ensuring reliability and long service life.
Customized solutions
We offer customized sealing solutions for special operating conditions, addressing complex challenges such as high temperature, high pressure, and corrosion.
Information Security Commitment
All of your information will be used solely for technical coordination and solution provision. We promise to maintain strict confidentiality and absolutely not disclose it to any third party.
