Forward Delay Valve
- Connect an external vacuum source to port on black (or red) side of delay valve. Connect one end of a 24" section of rubber hose to vacuum gauge and the other end to the port on colored side of valve.
- With elapsed time device in view and a constant 10 in. Hg of vacuum applied, note time required for gauge pointer to move from 0 in. Hg to 8 in. Hg.
- If valve fails to meet time limits, replace valve. If valve meets specifications, install so that black (or red) side is toward vacuum source.
Forward Delay Valve Time Limits
| Valve Color |
Min. Time |
Max. Time |
| Black/Purple |
0.3 |
0.7 |
| Black/Gray |
0.6 |
1.6 |
| Black/Brown |
1.0 |
3.0 |
| Red/Blue |
1.9 |
5.7 |
| Black/White |
2.7 |
9.3 |
| Black/Yellow |
4.5 |
13.2 |
| Black/Green |
14.0 |
47.2 |