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Split-Type Seal: A Convenient Sealing Solution for Industrial Equipment – Professional Selection and Operation Guide

Publish Time: 2026-02-25     Origin: Site


In industrial production, shaft end seals for rotating equipment such as pumps, fans, compressors, and reducers are crucial for ensuring stable equipment operation. Their sealing performance directly impacts production efficiency, equipment service life, and safe production. The integral seal and split-type seal differ significantly in installation, maintenance, and adaptability, with specific comparisons as follows:
Seal Type
Installation & Maintenance Features
Core Disadvantages
Preferred Application Scenarios
Traditional Integral Seal
Requires disassembly of equipment rotors, couplings, and other components; complex process
Time-consuming and labor-intensive; prone to additional equipment damage; high maintenance costs
Small, easy-to-disassemble conventional rotating equipment
Split-Type Seal
Detachable and spliceable; no need to disassemble the main equipment; pre-assembled and debugged before delivery for direct on-site installation
Sealing protection must be properly applied at the splice to prevent medium leakage
Large, hard-to-disassemble, old equipment, and emergency maintenance scenarios


With its core advantage of "installation and maintenance without disassembling equipment", the split-type seal has been widely used in multiple industries such as chemical engineering, mining, electric power, and environmental protection, becoming a preferred solution for sealing renovation of large rotating equipment and old equipment. From a professional perspective, this article comprehensively analyzes the core characteristics, application scenarios, selection key points, and daily operation specifications of split-type seals, providing professional references for the operation, maintenance, and procurement of industrial equipment.

I. Core Definition and Structural Characteristics of Split-Type Seals

A split-type seal, also known as a detachable seal, is a shaft end sealing device that can be split into two (or more) parts along the axial or radial direction. It is mainly used for shaft end sealing of rotating equipment and is compatible with different specifications of shaft diameters and seal chamber sizes. Compared with traditional integral seals, the core structural advantage of the split-type seal lies in its "detachable design". Its overall structure mainly consists of split rotating rings, split stationary rings, seal seats, compensation springs, seal rings, and fasteners. All components adopt a split structural design, are pre-assembled and debugged before leaving the factory. During on-site installation, it is only necessary to wrap the two parts of the seal around the shaft diameter, splice them, and tighten the fasteners to complete the installation, without disassembling the main components of the equipment.
The structural design of the split-type seal balances sealing performance and convenience: the rotating and stationary rings are made of wear-resistant and corrosion-resistant materials (such as silicon carbide, cemented carbide, fluororubber, etc.) to ensure the sealing performance and service life of the seal faces; the compensation spring adopts an embedded design, which, combined with the split structure, can not only realize automatic compensation of the seal faces but also prevent the spring from being blocked or eroded by the medium; the seal seat is accurately matched with the equipment's seal chamber, and a seal gasket is used for sealing at the splice to prevent medium leakage from the splice gap, ensuring the overall sealing reliability of the split-type seal.

II. Core Application Scenarios of Split-Type Seals

The application scenarios of split-type seals mainly focus on "hard-to-disassemble equipment", "large rotating equipment", "emergency maintenance", and "old equipment sealing renovation". Their flexible and convenient installation advantages are particularly prominent in various scenarios, with specific application details shown in the following table:
Application Scenario
Core Scenario Requirements
Core Advantages of Split-Type Seals
Typical Application Equipment
Sealing for Large Rotating Equipment
Large equipment size, heavy components, high disassembly difficulty, and the need to reduce downtime
In-situ splicing installation without disassembling the rotor; maintenance efficiency improved by more than 80%
Large pumps, fans, compressors
Sealing Renovation for Old Equipment
Aged equipment components, easy damage during disassembly, and controllable renovation costs
Flexible size customization without major equipment renovation; reduced renovation risks
Old reducers, old transfer pumps
Emergency Maintenance Scenarios
Sudden seal failure requiring quick replacement to reduce production losses
Replacement can be completed within 1-2 hours, greatly shortening downtime
Chemical pumps and mining pumps with high requirements for production continuity
Sealing for Equipment Under Special Working Conditions
Highly corrosive and particle-containing media, prone to seal wear and frequent maintenance needs
Customizable materials; convenient maintenance reduces maintenance frequency and costs
Chemical pumps for corrosive media, mining pumps for particle-containing media

III. Core Selection Key Points of Split-Type Seals

Improper selection is a major cause of leakage and early failure of split-type seals. Combined with the operating conditions and equipment parameters of industrial equipment, the core selection key points are summarized in the following table, which can be directly used as a selection reference:
Selection Dimension
Core Selection Requirements
Notes
Shaft Diameter & Seal Chamber Size
Accurately match the equipment's shaft diameter, seal chamber inner diameter, and depth
If the shaft diameter is worn or elliptical, please inform the manufacturer in advance for customization
Operating Parameters
Select conventional types for low pressure and normal temperature, enhanced types for high pressure and high temperature, and low-friction types for high speed
The fluctuation range of operating parameters must be indicated; enhanced design is required for adapting to extreme working conditions
Medium Characteristics
Use conventional materials for clean and non-corrosive media; use customized materials for highly corrosive/particle-containing media
Concentration must be provided for highly corrosive media; particle size must be clarified for particle-containing media
Installation Environment
Select compact types for narrow spaces, buffer types for high vibration, and waterproof and dustproof types for outdoor use
Comprehensive selection should be based on the equipment's installation location and operating environment

IV. Daily Operation and Maintenance Specifications for Split-Type Seals

Scientific daily operation and maintenance can effectively extend the service life of split-type seals and reduce leakage risks. Combined with their structural characteristics, the core daily operation and maintenance specifications are sorted out in the following table:
Operation and Maintenance Link
Core Operation Content
Purpose of Operation and Maintenance
Inspection After Installation
Manually rotate the rotor to check for jamming/loosening of seals; monitor temperature (≤80℃) and leakage after startup
Ensure correct installation and avoid initial seal failure
Regular Inspection and Cleaning
Inspect splices, fasteners, and seal rings; clean impurities and oil stains on seal faces
Timely detect hidden dangers and reduce wear on seal faces
Replacement of Wear Parts
Regularly replace seal rings and gaskets; use parts of the original model
Avoid seal leakage caused by aging of易损 parts

V. Conclusion

As a convenient, efficient, and reliable shaft end sealing form, the core value of the split-type seal lies in solving the pain points of traditional integral seals, such as "inconvenient installation and maintenance, time-consuming and labor-intensive". It is particularly suitable for large rotating equipment, old equipment sealing renovation, and emergency maintenance scenarios, playing an irreplaceable role in industrial production. Selecting a suitable split-type seal and following scientific operation and maintenance specifications can not only ensure the sealing effect of the equipment but also reduce maintenance costs and improve production continuity.
As a professional sealing solution provider, with years of industry experience, our company can customize suitable split-type seal products according to the needs of different industries and working conditions, and provide full-process selection guidance, installation and commissioning, and after-sales maintenance services. At present, our company has officially resumed work on February 24th, and all services have fully resumed. We welcome customers from all sectors to consult and cooperate with us to solve industrial equipment sealing problems and help enterprises achieve efficient and stable production.

Kind Reminder: Post-Holiday Work Resumption Notice

In line with the post-holiday production arrangement, our company has officially resumed work on February 24th, fully restoring services related to split-type seals. For needs such as customization consultation, selection guidance, sample delivery, and after-sales maintenance of split-type seals, you can contact our company for docking at any time. We will provide professional technical support and efficient response speed to guarantee the sealing operation and maintenance of your equipment, help enterprises quickly resume production, and solve sealing-related problems.




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