سازنده این قطعه از سال 1377
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| DECRIPTION | H2S SERVICE | SIZE | PART NAME | .PART NO |
| NO | “1 | Union Seal | 59/2 | |
| NO | “2 | Union Seal | 59/4 | |
| YES | “2 | Union Seal | 59/4-2 | |
| NO | “3 | Union Seal | 59/1 | |
| YES | “3 | Union Seal | 1255 | |
| NO | “4 | Union Seal | 59/3 | |
| YES | “5 | Union Seal | 59/5 | |
| YES | “2-1/2 | Union Seal | 1445 | |
| NO | “1-1/2 | Union Seal | 1780 |