WENZHOU GRH MANUFACTURE CO.,LTD
WENZHOU GRH MANUFACTURE CO., LTD. GAS SUPPORT RACK HANDLE
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Introduction of linkage door closer:
The utility model relates to a lonkage door closer (also known as a power delivery relase chute), which is matched with an ordinary door closer. The utility model is a device for positioning the door, and the angle of the positioning can be adjusted so that the fire door can be normally opened.
When a fire occurs, the fire control linkage controls the disconnection of the power supply, and the linkage door closer is released and positioned, and the fire door is closed under the function of an ordinary door closer, and the function of the idle feedback is connected at the same time.
| Type of door | Open door field monitor | Field monitor with normally closed door | Common mechanical door closer |
| Normally closed door single door | Unwanted | One | One set |
| Normally closed door double door | Unwanted | One | Two set |
| Normally closed door single door | One | Unwanted | Unwanted |
| Open door double door | Two | Unwanted | Unwanted |
