108 Single Face Submersible Pump Seal Framework
The 108 single face submersible pump seal is a proven sealing solution widely used in submersible pumps for clean water, sewage and alkali water service. It combines a single face mechanical seal with a framework oil seal, forming a double protection barrier that keeps water out of the motor chamber even under submerged conditions.
The multi-springs of this submersible pump seal do not contact the medium, which prevents blocking by sand and debris, and the double-balanced structure on the medium side maintains stable face loading during operation. With a short inboard length, the 108 submersible pump seal fits compact submersible pump designs and is easy to install and maintain.
This submersible pump seal operates with shaft diameters from 10 mm to 55 mm, pressures up to 0.8MPa and media temperatures from -20°C to 150°C. Low-pressure circulating water is introduced between the primary seal and the oil seal, which improves lubrication of the first seal face and carries off friction heat and leakage.
The rotary and stationary rings are available in carbon, silicon carbide, tungsten carbide and ceramic, with O-rings in EPDM, NBR, AFLAS, Kalrez or PTFE and springs and metal parts in SUS304 or SUS316. Excellent wear-resistant friction pairs give the 108 single face submersible pump seal a long service life in continuous submerged duty.
Technical Parameters
| Parameter |
Value |
| Model |
108 |
| Shaft Diameter |
10 ~ 55 mm |
| Working Pressure |
0 ~ 0.8 MPa |
| Media Temperature |
-20 °C ~ 150 °C |
| Sliding Velocity |
≤ 10 m/s |
| Seal Type |
Single Face + Framework Oil Seal |
| Rotation Direction |
Independent of direction of rotation |
| Spring Design |
Multi-springs, no contact with medium |
| Rotary / Stationary Ring |
Carbon / SiC / Tungsten Carbide / Ceramic |
| O-Ring |
EPDM / NBR / AFLAS / Kalrez / PTFE |
| Spring and Metal Parts |
SUS304 / SUS316 |
Applications
- Submersible water pumps and deep well pumps
- Submersible sewage pumps and drainage pumps
- Water and alkali circulating pumps
- Agricultural irrigation submersible pumps
- Industrial clean water and waste water systems
Key Advantages
- Single face plus framework oil seal provides double protection in submerged conditions
- Multi-springs do not contact the medium, preventing blocking by sand and debris
- Double-balanced structure on the medium side for stable sealing
- Low-pressure circulating water improves lubrication and removes friction heat
- Short inboard length fits compact submersible pump designs
- Easy installation and maintenance, excellent wear resistance
Product Q&A
Q1: Why does a submersible pump seal need a framework oil seal?
A1: In submerged operation the seal must prevent water from entering the motor chamber, not just stop leakage along the shaft. The framework oil seal works together with the single face mechanical seal in this 108 submersible pump seal, acting as a secondary barrier that protects the motor even if the primary seal face wears over time. This double protection is why the 108 model is the preferred submersible pump seal for sewage and drainage pumps.
Q2: Can this submersible pump seal handle sand and dirty water?
A2: Yes. The multi-springs of the 108 submersible pump seal do not contact the medium, so sand and solid particles cannot block the spring movement. The wear-resistant friction pairs, available in silicon carbide or tungsten carbide, tolerate abrasive media, and the low-pressure circulating water between the primary seal and oil seal flushes the faces and carries away abrasive particles and friction heat.
Q3: What are the operating limits of the 108 submersible pump seal?
A3: The 108 submersible pump seal covers shaft diameters from 10 mm to 55 mm, working pressure from 0 to 0.8MPa, media temperature from -20°C to 150°C and sliding velocity up to 10 m/s. The seal is independent of the direction of rotation, which simplifies installation in both clockwise and counter-clockwise rotating submersible pumps.
Q4: Do you support OEM production of the 108 submersible pump seal?
A4: Yes. As a seal factory with over 30 years of experience, we support OEM and ODM production of the 108 submersible pump seal, including custom shaft sizes, special friction pair materials, FDA-grade elastomers and private label packaging. Samples are available before mass production, and a drawing proposal is provided free of charge for bulk orders.
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