AS GR-SA
Astra Seals AS GR-SA and GR-SA-INFK Mechanical Seal for Sewage Pumps. Single end, multiple still springs with spring protection, balanced, independent direction of rotation, bolt transmission, non-cartridge seal. The springs are separated from the sealed mediums so that they will not be jammed. Multi spring structure makes sure the load on the sealing faces balanced. Compact structure with easy installation and reliable performance. Can work as an alternative to Gorman-Rupp and Grundfos original seal product GR-SA or replacing Type 891 mechanical seal. Inner diameters: 28 mm, 38 mm, 50 mm, 65 mm, 70 mm, 80 mm, 90 mm, 100 mm. Pressure: ≤1.6 MPa, Temperature: -20~120°C, Linear Speed: ≤15 m/s. Standards: DIN24960, ISO3069, GB6556, EN12756. Widely used in sewage pumps, immersible pumps, paper pulp pumps and other rotary devices for industries such as city construction, mining, power plants and sewage treatment.
Materials
Rotary Face / Stationary Face / Elastomer / Spring / Metal Parts
Carbon/SiC/TC (Rotary) / SiC/TC (Stationary) / NBR/Viton/EPDM (Elastomers) / SS304/SS316 (Springs) / SS304/SS316 (Metal Parts)
1 Variant
| Model | Materials | GA |
|---|---|---|
| GR-SA | Carbon/SiC/TC (Rotary) / SiC/TC (Stationary) / NBR/Viton/EPDM (Elastomers) / SS304/SS316 (Springs) / SS304/SS316 (Metal Parts) | — |
Operating Conditions & Materials
Pressure
1.6 MPa or less
Temperature
-20 ~ 120 ºC
Linear Speed
15 m/s or less
Mediums
Water, oil, sewage and other weak corrosive mediums.
Customization Available
Changes of materials for getting other operating parameters are possible. Contact us with your requirements.
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