O-ring and welded metal bellows mechanical seals
Latest generation seals (recommended)
| Product | Description | Designation | Suggested Industry |
|---|---|---|---|
| APITERM SD | Dual cartridge welded metal bellows mechanical seal, for high temperature applications | API 682 Type C, Arrangements 2 and 3 | Oil refining, petrochemical, gas producing |
| APILITE RDT | Dual, double-balanced, o-ring mechanical seal | Type A, Arrangement 2 and 3 | Oil refining, petrochemical, gas producing |
| 50 Series | High pressure mechanical seal, single, tandem or double | Type A, Arrangement 1, 2 or 3 | Oil Producing, oil transportation, oil refining, petrochemical, power generation |
Single seals for oil and gas applications (recommended)
| Product | Description | Designation | Suggested Industry |
|---|---|---|---|
| RO | Single cartridge o-ring mechanical seal | API 682 Type A, Arrangement 1 | Oil transportation, oil refining, oil producing |
Traditional mechanical seals
| Product | Description | Designation | Suggested Industry |
|---|---|---|---|
| SD | Dual cartridge welded metal bellows mechanical seal, for high temperature applications | API 682 Type C, Arrangements 2 and 3 | Oil refining, petrochemical, gas producing |
| SO | Single cartridge welded metal bellows mechanical seal, for high temperature applications | API 682 Type C, Arrangement 1 | Oil refining, petrochemical |
| RDT-37 | Tandem o-ring mechanical seal | API 682 Type A, Arrangement 2 | Oil refining, petrochemical, gas producing |
| RDT-48A | Tandem o-ring mechanical seal, for high pressure applications | API 682 Type A, Arrangement 2 | Oil refining, petrochemical, gas producing |
RDU ![]() |
Dual, double-balanced, o-ring mechanical seal | Type A, Arrangement 3 and 2 | Petrochemical, chemical, pulp and paper |
| RDD | Double o-ring mechanical seal for pumps and mixers | API 682 Type A, Arrangement 3 | Petrochemical, chemical |
| SDVT | Tandem cartridge welded metal bellows mechanical seal with stationary o-rings, for chemical applications | API 682 Type B, Arrangement 2 | Petrochemical, chemical, oil refining, |
See also:
Full product line catalog (PDF file, 2.68 Mb)
- Photos of installed mechanical seals
TREM Engineering offers mechanical seals for process pumps with high reliability and an excellent value for money. Within the production range are the following types of mechanical seals as defined by API682 Standard:

