The single-end bellows seal is a high-performance, single-end, container-type rotary shaft seal designed specifically for rotating equipment such as medium- and low-pressure chemical process pumps and high- and low-temperature pumps. It employs a bellows rotary core structure and flexible graphite auxiliary sealing technology to achieve stable sealing under high and low temperature and medium- and low-pressure conditions. It combines axial compactness with excellent end-face fit, providing long-life, low-leakage sealing for rotary pumps in the chemical, petroleum, and energy industries. It is a core sealing component for industrial fluid machinery.
Core Design Features
- Single-End Face Structure: The single-end face friction pair design is compact, requires little installation space, is suitable for typical low and medium pressure conditions, and provides stable sealing performance.
- Container-Type Integrated Structure: The integrated container-type layout features high integration of sealing components, facilitating easy installation and disassembly, simplifying maintenance, and significantly reducing on-site operation and maintenance difficulty.
- Rotating Bellows Design: The rotating bellows structure has a compact axial dimension and excellent end-face fit, automatically compensating for shaft movement, eccentricity, and vibration. It perfectly adapts to high and low temperature media conditions, and an optional floating throttling sleeve can further enhance sealing performance.
- Flexible Graphite Auxiliary Sealing Ring: Equipped with a flexible graphite auxiliary sealing ring, it offers strong sealing compensation, resistance to high and low temperatures and corrosion, further improving sealing reliability.
- Liquid Distribution and Flushing Design: Integrated liquid distribution and flushing system, supporting PLAN 11 and 21. Multiple flushing solutions effectively prevent media coking and blockage, extending seal life.
Core Operating Parameters
- Applicable Temperature: -40℃~400℃ (depending on specific material selection), wide temperature range coverage, suitable for low temperature, normal temperature, and medium-high temperature operating environments.
- Working Pressure: 0~2.0MPa, suitable for stable sealing requirements under medium and low pressure conditions.
- Allowable Speed/Linear Velocity: Maximum 3600 rpm (≤25 m/s linear velocity), meeting the sealing requirements of conventional rotating equipment.
- Flushing Solutions: Supports multiple flushing configurations such as PLAN 11 and 21, customizable according to media characteristics.
- Execution Standards: Strictly adheres to API 682 and JB/T 8723 industry standards to ensure compliant and reliable sealing performance.
Core Product Advantages
- Compact Axial Structure, Strong Installation Adaptability: The bellows structure has a compact axial dimension, perfectly adapting to pumps with limited installation space, facilitating installation without complex debugging, reducing on-site operation difficulty.
- Stable Adaptability to High and Low Temperatures: The rotary bellows structure offers excellent end-face fit and strong anti-interference capabilities, perfectly adapting to high and low temperature conditions from -40℃ to 400℃. It automatically compensates for shaft vibration and movement, ensuring stable and jam-free operation.
- Zero-Contamination Adaptability for Clean Media: The C-type seal conforms to API 682 standard layout 1, specifically designed for clean media without contamination, preventing media contamination and leakage, and ensuring media purity and equipment cleanliness.
- Flush-Induced Anti-Clogging, Long-Life and Durable: Supports multiple liquid distribution flushing schemes, effectively preventing media coking and clogging, significantly extending seal life, and reducing maintenance costs.
- Adaptability to All Scenarios and Multiple Operating Conditions: Covers low to medium pressure and high and low temperature operating conditions, adapting to various clean media, and widely used in chemical, petroleum, energy, and other industries.
- Industry Standard Compliance: Strictly adheres to API 682 and JB/T 8723 standards. Standard design and manufacturing ensure the safety, reliability, and long-term durability of the seal, conforming to global industrial sealing industry standards.
Core Product Features
- Compact Structure, Easy Installation: Compact axial dimensions, container-type single-end structure, small installation space, simple disassembly and maintenance.
- High and Low Temperature Adaptability, Stable Sealing: Rotary bellows structure automatically compensates for axial movement, adaptable to a wide temperature range of -40~400℃, ensuring stable sealing under high and low temperature conditions.
- Clean Media Adaptability, Zero Contamination: API 682 C-type structure, perfectly adaptable to clean media, bidirectional isolation, eliminating contamination.
- Flush-Avoid Clogging, Long Life and Durability: Supports multiple flushing schemes to prevent coking and clogging, extending seal life.
- Standard Compliance, Reliable Quality: Strictly adheres to API 682 and JB/T 8723 standards. Standardized, stable performance, and long service life ensure safe equipment operation.
Applicable Equipment and Scenarios
Core Compatible Equipment: Various medium and low pressure chemical process pumps, high and low temperature pumps, and other similar rotating equipment (such as agitators, fans, etc.).
Applicable Scenarios
Widely used in petrochemical, natural gas processing, energy and power, pharmaceutical, food and beverage, environmental protection, and other industries, providing stable and reliable sealing solutions for medium and low pressure chemical pumps, high and low temperature pumps, and other rotating equipment. Especially suitable for high and low temperature and clean media conditions. Also applicable for equipment maintenance and seal upgrades, ensuring safe, efficient, and continuous equipment operation.
