October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Vacuum Delay Valve (VDV)

Connect hand vacuum pump to VDV. Valves with one side BLACK or WHITE and other side colored are good if vacuum can be built-up in one direction, but not the other direction and if built-up vacuum slowly decreases. Valves with both sides the same color are good if vacuum can be built-up in both directions before visibly decreasing.