The single-end fixed bellows seal is a high-performance, single-end, container-type, non-contact 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 static bellows core structure and flexible graphite auxiliary sealing technology to achieve stable sealing under high and low temperature and medium- and low-pressure conditions. It also features excellent end-face fit and anti-interference capabilities, providing long-life, low-leakage sealing guarantees for rotating equipment in the chemical, petroleum, and energy industries. It is a core sealing component for industrial fluid pumps.
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 offers high structural strength, excellent integration of sealing components, convenient installation and disassembly, and simple maintenance.
- Static Bellows Design: The static bellows structure provides excellent end-face fit, strong anti-interference capabilities, and automatically compensates for shaft movement, eccentricity, and vibration. It perfectly adapts to high and low temperature operating environments, 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 solutions 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: 0~3.0MPa, suitable for stable sealing requirements under medium-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 solutions 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
- Static Bellows, High and Low Temperature Adaptability:The static bellows structure provides excellent end-face fit and strong anti-interference capabilities, perfectly adapting to – 1. Automatic Compensation for Shaft Vibration and Movement under High and Low
- Temperature Conditions (40℃~400℃): Ensures stable and smooth operation without jamming.
- Anti-Coking and Long-Life Design: For media prone to coking, a lining can be added to the cover. Combined with the PLAN62 steam purging solution, this effectively prevents media coking and blockage, significantly extending the seal’s service life.
- Zero-Contamination Adaptability for Clean Media: The C-type seal conforms to API 682 standard layout 1 and is specifically designed for clean, non-contaminating media, preventing media contamination and leakage, and ensuring media purity and equipment cleanliness.
- Adaptability to All Scenarios and Operating Conditions: Covers low to medium pressure and high and low temperature operating conditions, adaptable to various clean media and media prone to coking, widely used in chemical, petroleum, energy, and other industries.
- Convenient Installation and Maintenance: The container-type integrated structure makes installation and disassembly simple, facilitating subsequent maintenance and significantly reducing on-site operation and maintenance difficulty and downtime.
- 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
- Static Bellows, Worry-Free High and Low Temperatures
The static bellows structure automatically compensates for shaft movement, adapting to a wide temperature range of -40~400℃, ensuring stable sealing under high and low temperature conditions.
- Flush-Avoid and Anti-Clogging, Long Service Life and Durability
Liquid distribution flushing + steam purging solution prevents coking and clogging, extending seal service life and reducing maintenance costs.
- Clean Media Compatibility, Zero Contamination
API 682 C-type structure perfectly adapts to clean media, providing bidirectional isolation to prevent contamination.
- Compact Structure, Easy Installation
Container-type single-end structure, small installation space, simple disassembly and maintenance, compatible with various pump equipment.
- 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
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, clean media, and easily coking media conditions. Also applicable for equipment maintenance and seal upgrades, ensuring safe, efficient, and continuous equipment operation.
