Dampers equipped with hold-open pneumatic closers have a variety of adjustments that you can use to make the door close smoothly every time. While eve...

The floor spring is not the larger the better, if the floor spring specifications are too large, the door will be very laborious. It's good to fit...

he door closer is an adjustable, spring-loaded mechanical arm that closes automatically either after a mechanical opening or after someone manually op...

1, which occasions need to install door closersThere are fire, theft prevention needs or national mandatory requirements, as well as access control au...

With the development and progress of society, people are paying more and more attention to their own health. Indoor air quality is a factor directly r...

Air windows promote natural ventilation in the roomFor many places, in spring and summer or summer and autumn, people often switch between opening win...