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Forward Delay Valve

  1. Connect external vacuum source to port on Black (or Red) side of delay valve. Connect vacuum gauge to port on colored side of valve.
  2. With elapsed time device in view and a constant 10 in. Hg vacuum applied, note time required for gauge pointer to move from 0-8 in. Hg.
  3. 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 (1)

Valve Color Min. Time Max Time
Black/Purple 3.2 4.8
Black/Gray 8 12
Black/Brown 16 24
Black/Orange 1.5 2.5
Black/White 50 77
Black/Yellow 80 120
Black/Green 160 240
(1) Time in seconds.