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: ≤0.8 MPa, Temperature: -20~150°C, Linear Speed: ≤15 m/s. Standards: ISO3069, GB6556, DIN24960. Widely used in petrochemical engineering, oil refining, chemical processing, chemical fibering, water treatment and chemical transportation.
Materials
Rotary Face / Stationary Face / Elastomer / Spring / Metal Parts
SiC/TC (Rotary) / Carbon/SiC/TC (Stationary) / NBR/EPDM/FFKM/Aflas/PTFE (Elastomers) / SS304/SS316L (Springs) / 2Cr13/SS304/SS316 (Metal Parts)
1 Variant
| Model | Materials | GA |
|---|---|---|
| 128 | SiC/TC (Rotary) / Carbon/SiC/TC (Stationary) / NBR/EPDM/FFKM/Aflas/PTFE (Elastomers) / SS304/SS316L (Springs) / 2Cr13/SS304/SS316 (Metal Parts) | — |
Operating Conditions & Materials
Pressure
0.8 MPa or less
Temperature
-20 ~ 150 ºC
Linear Speed
15 m/s or less
Mediums
Oil, water, amorphism acid, alkali, and organic solvents.
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 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.
AS 110
Astra Seals AS 110 Single Spring Elastomer Bellow Mechanical Seal. Single end, single spring, unbalanced, free rotary direction, spring coil driven. Simple structure, low cost, wide usage, stable and reliable. Can work with 128 seal as a double seal. Inner diameter: 35 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.
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