Product Overview:
The BS710 is a precision‑engineered stationary metal bellows semi‑cartridge mechanical seal developed for high‑temperature and hazardous process services, including hot oil, thermic fluids, hydrocarbons and chemically aggressive media. Its welded metal bellows element replaces conventional dynamic secondary elastomers, eliminating O‑ring hang‑up, hardening or cracking and making the seal particularly suitable where elevated temperatures and aggressive chemistry would quickly degrade elastomeric components.
In the stationary bellows configuration, the bellows and seal face remain fixed in the gland while the rotary hardware runs against them. This arrangement greatly reduces the influence of shaft deflection, vibration and run‑out on the sealing faces, promoting stable face tracking and improved reliability in demanding pump and mixer applications. The inherently non‑clogging bellows construction also resists fouling, supporting dependable performance with clean and light hydrocarbon services.
Supplied as a factory‑assembled semi‑cartridge unit, the BS710 is preset to the correct working length and mounts directly onto the shaft or sleeve without on‑site adjustment. This design simplifies installation, prevents misalignment, reduces setting errors and shortens maintenance turnaround, making it ideal for plant‑wide standardisation on critical equipment. The hydraulically balanced seal geometry minimises face loading and heat generation, enhancing seal stability under thermal cycling and pressure fluctuations in continuous‑duty operation.
BS710 stationary metal bellows semi‑cartridge seals are widely used in chemical processing units, petrochemical plants, refinery services, thermic‑fluid systems and allied industrial operations where high reliability and long service life are essential. In addition to new manufacture, our expertise in reconditioning metal bellows mechanical seals enables cost‑effective refurbishment solutions that restore performance, extend seal life and reduce overall maintenance costs for high‑temperature sealing systems.
Key Features;
- Available in both metric and inch shaft sizes, ensuring global compatibility across a wide range of pump and rotating‑equipment designs.
- Bi‑directional operation, independent of shaft rotation direction, offers versatile application in different pump orientations and start‑up conditions.
- Hydraulically balanced seal faces reduce heat generation and face loading, extending seal life and enhancing stability under thermal cycling and pressure fluctuations.
- Stationary welded metal bellows design minimises the effects of shaft run‑out and vibration on the sealing faces, delivering stable face tracking and improved reliability in demanding services.
- Semi‑cartridge construction, factory assembled and tested, provides accurate axial setting, quick installation and easy removal, reducing setting errors, maintenance time and overall downtime.
- Non‑clogging bellows geometry is ideal for clean and light hydrocarbon or thermic‑fluid services, and the overall design is engineered for continuous‑duty operation in severe chemical‑process environments.
