GLF-SA Mechanical Seal for Grundfos Sarlin Sewage Pumps
Product Overview
High-performance GLF-SA mechanical seal designed specifically for Grundfos Sarlin sewage pumps. Available in sizes 25mm, 32mm, 38mm, 50mm, and 65mm. This single-end seal replaces Vulcan 42 and original GR-SA seals.
Technical Specifications
Operating Parameters
| Temperature Range |
-30℃ to +200℃ |
| Maximum Pressure |
≤1.2 MPa |
| Linear Speed |
≤10 m/s |
| Compatible Media |
Water, oil, sewage, weak acids, weak alkalis |
Material Composition
| Rotary Ring |
SiC/TC |
| Stationary Ring |
SiC/TC |
| Elastomers |
NBR/Vit |
| Springs |
SS304/SS316 |
| Metal Components |
410S/SS304/SS316 |
Design Features
- Single end, multiple still springs with spring protection
- Balanced design with independent direction of rotation
- Bolt transmission, non-cartridge seal configuration
- Springs isolated from sealed media to prevent jamming
- Multi-spring structure ensures balanced sealing face load
- Compact design for easy installation and reliable performance
Application Scope
Ideal for sewage pumps, immersible pumps, paper pulp pumps, and other rotary devices across industries including city construction, mining, power plants, and sewage treatment facilities. Compatible with Gorman-Rupp and Grundfos pump systems.
Installation Requirements
- Shaft outside diameter tolerance: ±0.05mm
- Shaft run out: <0.1mm
- Shaft end float: <0.13mm
- No sharp edges on shaft over O-ring area
Important Note: During installation, avoid scratching or damaging O-rings. If any damage occurs, contact us immediately for replacement parts.
Installation Instructions
- Seal is pre-cleaned and leak-tested - do not disassemble before installation
- Ensure proper shaft lubrication and fitting allowances (dl h6 0.8)
- Position cartridge seal in pump chamber and tighten flange bolts
- Secure shaft sleeve with set screws and remove gauge plates
- Connect medium lead-in pipe to hole "G" for proper flushing
- Test rotation manually - smooth operation confirms proper installation
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