The 4U Mechanical Seal is a versatile and high-performance sealing solution designed for industrial pump applications handling a wide range of fluids, including water, oil, chemicals, and high-viscosity media. Engineered for durability and efficiency, it ensures reliable sealing performance even under challenging operating conditions.
This seal supports advanced material combinations such as silicon carbide, carbon, stainless steel, and elastomers like EPDM, VITON, and PTFE, providing excellent resistance to wear, corrosion, and chemical exposure. Its robust construction makes it suitable for continuous operation in demanding industrial environments.
The 4U is an ideal choice for applications requiring stable performance, reduced leakage, and long service life, especially in industries dealing with aggressive or heavy-duty fluids.
- High-performance mechanical seal for industrial pumps
- Suitable for water, oil, chemicals & high-viscosity fluids
- Advanced materials (SIC / Carbon / SS304 / Elastomers)
- Excellent resistance to corrosion and chemical exposure
- Supports EPDM, VITON, and PTFE sealing options
- Designed for continuous heavy-duty operation
- Reliable sealing with reduced leakage
| Seal size d(mm) | d 3 | d 4 | d 6 | d7 | d 5 | d 8 | l | l1 | l 4 | c |
| min | (±0.5) | (±0.5) | ||||||||
| 18 | 32 | 34 | 27 | 33 | twenty three | 3 | 52.0 | 45.0 | 5 | 2.0 |
| 20 | 34 | 36 | 29 | 35 | 25 | 3 | 52.0 | 45.0 | 5 | 2.0 |
| twenty two | 36 | 38 | 31 | 37 | 27 | 3 | 53.0 | 46.0 | 5 | 2.0 |
| twenty four | 38 | 40 | 33 | 39 | 29 | 3 | 56.0 | 49.0 | 5 | 2.0 |
| 25 | 39 | 41 | 34 | 40 | 30 | 3 | 56.0 | 49.0 | 5 | 2.0 |
| 28 | 42 | 44 | 37 | 43 | 33 | 3 | 56.5 | 49.5 | 5 | 2.0 |
| 30 | 44 | 46 | 39 | 45 | 35 | 3 | 57.0 | 50.0 | 5 | 2.0 |
| 32 | 46 | 48 | 42 | 48 | 38 | 3 | 58.5 | 51.5 | 5 | 2.0 |
| 33 | 47 | 49 | 42 | 48 | 38 | 3 | 58.5 | 51.5 | 5 | 2.0 |
| 35 | 49 | 51 | 44 | 50 | 40 | 3 | 58.5 | 51.5 | 5 | 2.0 |
| 38 | 54 | 58 | 49 | 56 | 44 | 4 | 62.0 | 55.0 | 6 | 2.0 |
| 40 | 56 | 60 | 51 | 58 | 46 | 4 | 62.0 | 55.0 | 6 | 2.0 |
| 43 | 59 | 63 | 54 | 61 | 49 | 4 | 65.0 | 58.0 | 6 | 2.0 |
| 45 | 61 | 65 | 56 | 63 | 51 | 4 | 65.0 | 58.0 | 6 | 2.0 |
| 48 | 64 | 68 | 59 | 66 | 54 | 4 | 66.0 | 59.0 | 6 | 2.0 |
| 50 | 66 | 70 | 62 | 70 | 57 | 4 | 67.0 | 60.0 | 6 | 2.5 |
| 53 | 69 | 73 | 65 | 73 | 60 | 4 | 71.5 | 64.5 | 6 | 2.5 |
| 55 | 71 | 75 | 67 | 75 | 62 | 4 | 73.5 | 66.5 | 6 | 2.5 |
| 58 | 78 | 83 | 70 | 78 | 65 | 4 | 76.5 | 69.5 | 6 | 2.5 |
| 60 | 80 | 85 | 72 | 80 | 67 | 4 | 76.5 | 69.5 | 6 | 2.5 |
| 63 | 83 | 88 | 75 | 83 | 70 | 4 | 78.5 | 71.5 | 6 | 2.5 |
| 65 | 85 | 90 | 77 | 85 | 72 | 4 | 81.5 | 74.5 | 6 | 2.5 |
| 68 | 88 | 93 | 81 | 90 | 75 | 4 | 82.5 | 75.5 | 7 | 2.5 |
| 70 | 90 | 95 | 83 | 92 | 77 | 4 | 86.5 | 79.5 | 7 | 2.5 |
| 75 | 99 | 104 | 88 | 97 | 82 | 4 | 87.0 | 80.0 | 7 | 2.5 |
| 80 | 104 | 109 | 95 | 105 | 88 | 4 | 90.5 | 83.5 | 7 | 3.0 |
| 85 | 109 | 114 | 100 | no | 93 | 4 | 90.5 | 83.5 | 7 | 3.0 |
| 90 | 114 | 119 | 105 | 115 | 98 | 4 | 92.5 | 85.5 | 7 | 3.0 |
| 95 | 119 | 124 | 110 | 120 | 103 | 4 | 93.5 | 86.5 | 7 | 3.0 |
| 100 | 124 | 129 | 115 | 125 | 108 | 4 | 93.5 | 86.5 | 7 | 3.0 |
- Industrial pump systems
- Chemical and petrochemical industries
- Oil and lubricant processing
- Paper and pulp industry
- High-viscosity fluid handling systems
- Water and wastewater treatment