GEKRONE Automatic Door Closer Heavy Duty Fire Prevention Spring Hydraulic Aluminum Alloy Surface Mounted Residential Commerical Grade Door Closer Adjustable Speed Door Weights 187-231 Lbs Size3-Black

Material: The body is made of high-quality aluminum alloy, which is resistant to oxidation, corrosion, strength, and durability. The product has undergone millions of cycles of testing and can operate normally from -40 ℃ to 60 ℃. It has UL fire resistance and ANSI certification and is suitable for residential and commercial use. High toughness 60si2mn spring will not easily break or deform, and the piston and gear shaft have undergone high-frequency quenching treatment, with a long service life Two stage speed adjustment: The side of the door closer is equipped with two independent rotary valves. By adjusting them, you can control the closing speed of the door in sections of 180 ° -15 ° and 15 ° -0 ° to meet your specific needs. Slowing down the closing speed within the range of 15 ° -0 ° can prevent finger injuries, protect your door from strong impacts, and achieve silent closing. The valve should not be higher than the surface of the body, otherwise oil leakage may occur Attention: The door closer is suitable for doors with a width less than 1100mm and a weight between 85-105kg (187lb-231lb). There are three different installation methods based on the position of the door and door frame. Door opening range: up to 180 degrees. During installation, the door and frame should be on the same plane or within 5 cm/1.97 inches. When the distance between the planes exceeds 5 cm, additional parallel brackets (not included) need to be added Widely applicable: The door closer can be installed from the push or pull side of the door. Easy to install on wooden doors, anti-theft doors, fireproof doors, aluminum alloy doors, and other heavy metal doors. Can be used both indoors and outdoors, suitable for other public areas such as schools, hospitals, office buildings, shops, hotels, etc. Residential areas include bathroom doors, kitchen doors, warehouse doors, garage doors, etc Installation and after-sales service: The door closer is used for surface installation of doors and door frames. We provide all the necessary accessories for installation (excluding parallel brackets). With our comprehensive drawing instructions and video guide, you can enjoy worry free and fast installation, ensuring that your door closer operates correctly and effectively. We provide 24-hour manual customer service to promptly address any issues you may have with our products, Weight: 3.5 pounds, Manufacturer: GEKRONE