• Shaft Protection: Unlike standard pusher seals, the sealing O-ring is static against the shaft, eliminating the need for a hardened shaft sleeve.
• Self-Aligning: The flexible rubber body allows the seal face to self-align against the stationary seat, compensating for misalignment.
Key Features
• Non-Pusher Concept: Although it uses an O-ring, the design includes a protective sleeve or bellow-like elastomer section that grips the shaft, preventing the dynamic O-ring from wearing a groove in the shaft (fretting).
• Metric Precision: Exact fit for 40mm and 45mm metric pump shafts (DIN standard).
• Flexible Drive: The elastomer bellows section provides torque transmission and flexibility to handle shaft runout.
Technical Specs | Materials | ||
Pumps | Water pumps, Circulation Pumps, etc. | Stationary Ring | Carbon/Sic/TC |
Temperature | -20℃ to 180℃ | Rotary Ring | Ceramic/Sic/TC |
Pressure | ≤0.8MPa | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤10m/s | Spring and Metal Part | Stainless Steel |
Product Specifications
| Metric Size D1 | Size Code | D3 | D7 | L1 | L4 |
| 10 | 0100 | 20.00 | 18.10 | 15.00 | 5.50 |
| 11 | 0110 | 22.00 | 20.60 | 18.00 | 5.50 |
| 12 | 0120 | 22.00 | 20.60 | 18.00 | 5.50 |
| 13 | 0130 | 25.00 | 23.10 | 22.00 | 6.00 |
| 14 | 0140 | 25.00 | 23.10 | 22.00 | 6.00 |
| 15 | 0150 | 29.00 | 26.90 | 22.00 | 7.00 |
| 16 | 0160 | 29.00 | 26.90 | 23.00 | 7.00 |
| 17 | 0170 | 29.00 | 26.90 | 23.00 | 7.00 |
| 18 | 0180 | 33.00 | 30.90 | 24.00 | 8.00 |
| 19 | 0190 | 33.00 | 30.90 | 25.00 | 8.00 |
| 20 | 0200 | 33.00 | 30.90 | 25.00 | 8.00 |
| 21 | 0210 | 38.00 | 35.40 | 25.00 | 8.00 |
| 22 | 0220 | 38.00 | 35.40 | 25.00 | 8.00 |
| 23 | 0230 | 38.00 | 35.40 | 27.00 | 8.00 |
| 24 | 0240 | 38.00 | 35.40 | 27.00 | 8.00 |
| 25 | 0250 | 40.00 | 38.20 | 27.00 | 8.50 |
| 28 | 0280 | 46.00 | 43.30 | 29.00 | 9.00 |
| 29 | 0290 | 46.00 | 43.30 | 30.00 | 9.00 |
| 30 | 0300 | 46.00 | 43.30 | 30.00 | 9.00 |
| 32 | 0320 | 46.00 | 43.30 | 30.00 | 9.00 |
| 33 | 0330 | 48.00 | 53.50 | 39.00 | 11.50 |
| 35 | 0350 | 50.00 | 53.50 | 39.00 | 11.50 |
| 38 | 0380 | 58.00 | 60.50 | 39.00 | 11.50 |
| 40 | 0400 | 58.00 | 60.50 | 39.00 | 11.50 |
| 10 | 0100 | 20.00 | 21.00 | 15.00 | 7.00 |
| 12 | 0120 | 22.00 | 23.00 | 18.00 | 7.00 |
| 14 | 0140 | 25.00 | 25.00 | 22.00 | 7.00 |
| 16 | 0160 | 29.00 | 27.00 | 23.00 | 7.00 |
| 18 | 0180 | 33.00 | 33.00 | 24.00 | 10.00 |
| 20 | 0200 | 33.00 | 35.00 | 25.00 | 10.00 |
| 22 | 0220 | 38.00 | 37.00 | 25.00 | 10.00 |
| 24 | 0240 | 38.00 | 39.00 | 27.00 | 10.00 |
| 25 | 0250 | 40.00 | 40.00 | 27.00 | 10.00 |
| 28 | 0280 | 46.00 | 43.00 | 29.00 | 10.00 |
| 30 | 0300 | 46.00 | 45.00 | 30.00 | 10.00 |
| 32 | 0320 | 46.00 | 48.00 | 30.00 | 10.00 |
| 33 | 0330 | 48.00 | 48.00 | 39.00 | 10.00 |
| 35 | 0350 | 50.00 | 50.00 | 39.00 | 10.00 |
| 38 | 0380 | 56.00 | 56.00 | 42.00 | 13.00 |
| 40 | 0400 | 58.00 | 58.00 | 42.00 | 13.00 |
Workshop
This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.
Product Research, Development and Testing
Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All non pusher mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.
Industry Solutions
Case Study
Water Treatment Plant: A 40mm shaft submersible mixer was suffering from shaft wear due to standard O-ring seals. We switched to this non-pusher design. The elastomer grip protected the shaft, and the non pusher mechanical seal has lasted 2 years without damaging the equipment.
Testimonials
Great alternative to MG1 style non pusher mechanical seals when you want to protect the shaft. Fits our 45mm wastewater pumps perfectly.
—Maintenance Supervisor, Spain
FAQs about 40mm 45mm O-Ring Non Pusher Mechanical Seal
Q: What is the main advantage of a "Non-Pusher" design compared to a standard O ring mechanical seal?
A: The key advantage is shaft protection. In a standard "pusher" seal, the O-ring moves along the shaft, which can wear a groove (fretting) over time. This Non-Pusher design keeps the main sealing O-ring static against the shaft, eliminating this wear mechanism. It also often includes a protective elastomer sleeve that grips the shaft, preventing damage and eliminating the frequent need for a hardened shaft sleeve.
Q: For which applications is this seal most suitable?
A: This o ring mechanical seal is an excellent choice for general industrial water pumps, circulation pumps, and wastewater applications, as mentioned in the "Pumps" section. Its self-aligning feature, ability to handle minor shaft misalignment/runout, and shaft protection make it ideal for these standard duty services where avoiding shaft wear is a priority.
Q: What materials are available for the seal faces and secondary seals?
A: According to the Technical Specs table, you have several options:
Seal Faces (Stationary/Rotary Rings): Carbon, Silicon Carbide (SiC), Tungsten Carbide (TC), or Ceramic.
Secondary Seal (O-ring): NBR, EPDM, or Viton (FKM) elastomers, suitable for different fluid compatibilities and temperatures.
Spring & Metal Parts: Typically made from Stainless Steel for general corrosion resistance.
Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
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