Door closer speed, backcheck and delayed action

Specifications

Opening phase

Backcheck during opening

Closing phase

Closing speed, final latching, delayed closing

Check separately

Hold-open capability

Distinguish by the door's direction of movement

Backcheck acts while the door opens, hydraulically slowing the relevant phase of opening movement; it is not closing-speed control. Closing speed and final latching describe speeds or actions in different portions of the closing movement.

ISEO's general explanation uses the final 15° to explain latching action, but that illustration does not replace individual model installation instructions or establish how far to turn a valve on site.

Sources: [1] [2] [3] [4] [5]

Delayed closing differs from hold-open

The catalogue describes delayed closing as a delay over a certain angular portion of closing; a hold-open arm is a separately listed mechanical configuration. “Delay” does not mean the door can remain at a chosen angle indefinitely.

The IS315 technical table lists backcheck and delayed closing; IS155C lists backcheck with the delay field blank; IS65 lists only closing speed and final latching. Similar appearance does not mean identical adjustment features.

Sources: [1] [2] [3] [4] [5]

How to read model parameters

First identify the complete model and arm type, then check each item in the technical table. Example times or angles in one series description should not become shared parameters for every closer.

Adjustment items describe capabilities, while door width, weight, power size and mounting method determine another set of compatibility conditions. Abnormal closing cannot be diagnosed as a fault merely because a page says “with backcheck”; check the corresponding model documents.

Sources: [1] [2] [3] [4] [5]

Sources

1. ISEO · Catalogue 07 .42, PDF page 8

   Function descriptions, model configurations or application conditions on this page.

2. ISEO · Catalogue 07 .42, PDF page 9

   Function descriptions, model configurations or application conditions on this page.

3. ISEO · Catalogue 07 .42, PDF page 20

   Function descriptions, model configurations or application conditions on this page.

4. ISEO · Catalogue 07 .42, PDF page 24

   Function descriptions, model configurations or application conditions on this page.

5. ISEO · Catalogue 07 .42, PDF page 30

   Function descriptions, model configurations or application conditions on this page.

Manufacturer documents are provided in their original language.

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