Views: 0 Author: Site Editor Publish Time: 2022-02-25 Origin: Site
Modern hydraulic door closers (door closers for short) began with a patent registered by the Americans within the early twentieth century, that differs from ancient doors nearer by resistance the liquid within the door closer to realize a padding impact. The core of the look plan of hydraulic door nearer is to realize management of the closing method, so that the varied purposeful indicators of the closing method may be adjusted in keeping with human desires. So what are the types of hydraulic door closers? The types of door closers can be divided into externally mounted and inline door top closers, inline door closers, door bottom closers (floor springs), vertical door closers (built-in vertical door closers), and alternative styles of door closers.
Here is the content list:
External top door closers
In-line door top closers
American, European, and Chinese standard door closers
The external door closer is equipped with a hydraulic buffer oil pump device, which allows the door to open and close automatically. Its main feature is that the door closes slowly, and no collision sound after closing, it can be used in schools, hospitals, office buildings, and hotels, and other doors.
The inline door top spring is composed of a hydraulic cushion spring installed on the door fan and a slide and slider installed on the door frame as well as a coupling rod. Since the inline door top closer is installed in the slot of the door fan and door frame, it does not affect the appearance of the door when it is closed. It is suitable for use on the doors of high-class hotel rooms.
1) High-grade American Standard door closer
Door closers reach 2 million times open life test. It meets the requirements of the U.S. ANSI 156 Class I, with adjustable strength function. It is suitable for high security, high frequency of use of public buildings, engineering and maintenance doors with the heavy-duty high-strength door control system.
2）Mid-range American Standard Door Closer
The fire door closer reaches 1 million times opening life test. With adjustable strength perform, appropriate for top security, high frequency of use of high-strength residential doors and medium strength business doors door system.
More than 500,000 times life test, it meets the requirements of EN 1154, with adjustable strength function. It is suitable for heavy-duty high-strength door control systems for high-security, high-use public buildings, engineering and maintenance doors.
Automatic door closer more than 300,000 times life test, to meet the requirements of EN 1154. With adjustable strength function. It is suitable for a door control system of high-strength residential doors and medium-strength commercial doors with higher security and a higher frequency of use.
More than 500,000 times life test, the latest standard of built-in vertical door closer, also requires more than 2 million times life test. It is appropriate for door system of doors utilized in industrial and mining enterprises, residential homes, business buildings, hospitals, colleges, and alternative occasions.
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