Setting The Reaction Speed; Check Function; Checking For Leakage - Hawido 1401 Instruction

5.

Setting the reaction speed

If the HAWIDO does not operate quietly, or if pressure shocks occur in the supply network, this can be
corrected by the corresponding adjustment of the one-way flow restrictor (4).
Procedure:
Loosen the locknut. Screw in the set screw clockwise with a screwdriver until the valve operates quietly.
Then retighten the locknut.
Caution: The setting screw must always remain at least 4 - 5 turns open, otherwise the valve will not reopen
after the closing sequence.
6.

Check function

The valve closing speed can be set on the check valve (9) with a volume backflow (p2 greater than p1).
The check valve (9) must be open by at least one turn.
7.

Checking for leakage

The HAWIDO's are tested at the factory for both leakage and function before delivery. When checking for
leakage under operational conditions, particular attention must therefore be given to the seals of the flange
connections, the control line and the central plug screw on the valve cover. Where necessary, ensure the
seal by retightening the connections.
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