Installed before the lubricator.
This allows taking out non lubricated air when required
| Groz Part | Ordering Nr. | For use with Model Series | ||
 A2V01 |
60657 | Miniature - F13, FS13, L13, R13, FRC13 |
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| A2V02 |
60658 | Intermediate - F14, FS14, L14, R14, FRC14 |
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| A2V03 |
60659 | Standard - F15, FS15, L15, R15, FRC15 |
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