subject: Automatic Sliding Door Closer: Information About Different Kinds Of Automatic Door Closer [print this page] You can find 3 types of automatic doorway closer available in the market nowadays. Based about the weight from the door and how you plan use it there is a perfect style of doorway closer for you to select from. The most common style is the spring loaded door closer or hinge pin door closer which are perfect for light applications.
Perfect for light weight doors like patio doors which is often created of lightweight aluminum frame with mesh screen spanning nearly half of it. This door closer is usually created of aluminum tubing or cylinder with only the push rod exposed while the spring is hidden on the inside. The principle employed is very basic, a spring system pulls the door with a little tension and whenever you open it extra tension from the string is developed which force the doorway to close when released. The common problem with spring loaded door closer is that the push rod could be easily damaged if not installed properly or should you open the door too much. Also the piston rod bearing or bushing at the front end which absorbed the linear load wears overtime.
Another kind of door closer is the air-driven door closer. They're very similar to their spring loaded cousins with respect to load capacity and overall look. It also uses the same aluminum tube frame and has a piston rod. The main improvement is that it uses pressurized air rather than springs that is generated when you open the door compressing the air inside then pulls and close the door whenever you release it. Also the inner design is a bit different.
Within the spring loaded door closer there's no rubber seal around the piston or it isn't air tight while in pneumatic door better, a rubber seal is installed to avoid the air from getting out. Without the rubber seal to hold the air pressure or when it's damaged will make the product useless. Additionally the inner wall of the aluminum cylinder is mirror polished for smooth functioning and to extend the life of the rubber seal and also the device itself. Since the air is compressible this type of door closer has the tendency of slamming the door if not properly fine-tuned.
The last kind of automatic door closer is the hydraulic oil filled door closer. This type is the most dependable and toughest among the 3. It also has a very different design and mounting structure compared to the other. While the spring loaded and pneumatic door closer is installed in the side from the door, around the hinge, the hydraulic kind is installed in the top part of the door. It's perfect to use in large weight doors and is normally used in entrance doors or main doors. The closing speed is adjustable using the turn of the screw. With the mounting template (to mark holes for drilling) and installation instruction bundled within the package making it very easy to set up (drill required) and does not need a professional to do them. Not like pneumatic air, hydraulic fluid is not compressible, so, it's possible to correct the closing from the door at a really low speed and smoothly.
You will find also different forms of automatic door closer such as the motorized automatic door closer. Actually it's not only for closing but for opening too that is really comfortable for hands free, disabled and handicap access. This product uses a 24 VDC motor to run and controlled by a microprocessor which enables you to open and close the door both by hand and automatically. The encoder that is coupled to the DC motor detects the angle from the door at all times, meaning the encoder can identify if the door is open and how a lot and responds accordingly. In contrast to non electric door better it is more expensive and value close to 1.5k USD and most likely difficult to maintain simply because of lots of moving parts and certainly required a professional technician to mount.
