AS FBD
Astra Seals AS FBD Elastomer Bellow Single Spring Mechanical Seal. Single end, unbalanced, independent direction of rotation, single spring + elastomer bellow as compensation components. Replaces EagleBurgmann and John Crane mechanical seals. Inner diameter: 20 mm to 120 mm. Pressure: ≤1.4 MPa, Temperature: -20~120°C, Linear Speed: ≤15 m/s. Standards: ISO3069, GB6556, DIN24960. Designed for clean water, sewage water, oil and other moderately corrosive fluids.
Materials
Rotary Face / Stationary Face / Elastomer / Spring / Metal Parts
SiC/TC/Carbon (Rotary) / SiC/TC (Stationary) / Viton/EPDM/Aflas/FFKM (Elastomers) / SS304/SS316L/HC276 (Springs) / SS304/SS316 (Metal Parts)
1 Variant
| Model | Materials | GA |
|---|---|---|
| FBD | SiC/TC/Carbon (Rotary) / SiC/TC (Stationary) / Viton/EPDM/Aflas/FFKM (Elastomers) / SS304/SS316L/HC276 (Springs) / SS304/SS316 (Metal Parts) | — |
Operating Conditions & Materials
Pressure
1.4 MPa or less
Temperature
-20 ~ 120 ºC
Linear Speed
15 m/s or less
Mediums
Fresh water, sewage, oil and other moderately corrosive fluids.
Customization Available
Changes of materials for getting other operating parameters are possible. Contact us with your requirements.
Related Products
AS 2100
Compact, unitized, singlespring elastomer bellows seal for maximum durability and performance. Ideal for centrifugal, rotary and turbine pumps, compressors, chillers and other rotary equipment. Often found in waterbased applications such as wastewater treatment, potable water, HVAC, pool and spa.
AS 128
Astra Seals AS 128 Rubber Bellow Mechanical Seal. Single end, rubber bellow + single spring, balanced, free rotary direction, spring coil driven. Simple structure, low cost, wide usage, stable and reliable. Can work with AS 110 as a double seal. Inner diameter: 20 mm to 100 mm. Pressure: ≤8 MPa, Temperature: 20~150°C, Linear Speed: ≤15 m/s. Standards: ISO3069, GB6556, DINWidely used in petrochemical engineering, oil refining, chemical processing, chemical fibering, water treatment and chemical transportation.
AS 502
Astra Seals AS 502 Elastomer Bellow Mechanical Seal. Single end, balanced, independent direction of rotation, rubber bellow, bellow transmission. Easy to install with pressure compensation to sealing faces. Bellow design prevents radial runout, increasing rotary ring floatability. Replaces John Crane Type Inner diameter: 14 mm to 100 mm. Pressure: ≤4 MPa, Temperature: 20~120°C, Linear Speed: ≤13 m/s. Standards: ISO3069, GB6556, DINWidely used in centrifugal pumps, compressors and reaction kettles for painting and ink industries.
Explore Related Mechanical Seal Categories
Compare adjacent seal types to find the best fit for your service conditions, pressure and temperature range.
Spring Pusher Seal
Universal and OEM cartridge seals for pumps, compressors, and general rotating equipment.
Bellow Seal
Metal and PTFE bellow seals for high-temperature, high-pressure, and corrosive applications.
Slurry & FGD Seals
Heavy-duty mechanical seals for slurry pumps, FGD systems, and abrasive media applications.
Special Seals
Specialty and custom-engineered sealing solutions for unique applications and equipment.