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  1. 11-02-17, 05:20 PM #1
    Huw Eastwood
    Huw Eastwood is offline Member
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    Quote Originally Posted by T Davison View Post
    What was the pressure system use for on these vault doors?
    Why are the early doors round and the later doors rectangular with the pressure system?

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    How is this vault door locked or unlocked?
    Enjoy TJ
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  2. 03-01-18, 06:54 AM #2
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    VaultDoors
    VaultDoors is offline Member
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    The four electric contacts plug into the four 'receptacles' when the locking bolts are extended. Located opposite of each bolt contact above the inside/top of the jamb.

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