General description The Automatic Hydraulic Door Closer is designed for both commercial and residential use, accommodating doors weighing between 20-40 kg. This adjustable spring door closer features a stop device that allows the door to remain open at any angle between 90° and 180°, eliminating the need for external force or door stops. It is ideal for maintaining ventilation or facilitating the movement of goods. Technical specifications Weight capacity: 20-40 kg Door width compatibility: 750-850 mm Material: High-quality aluminum alloy Closing speed control: Two independent valves for closing and locking speed Installation Comes with a detailed installation manual Includes an installation video for easy setup Simple and smooth installation process Usage Automatically closes the door when pulled within 90° Can be used for right and left opening doors Suitable for various door types: wooden, metal, residential, and commercial Applicable for exterior and interior doors, including fire