IRONWALLS Heavy Duty Commercial Door Closer Outdoor Indoor, Hydraulic Automatic Door Closer with Adjustable Spring Size 1-6, Delayed Action, Back-Check, Surface-Mounted Door Closing Mechanism, Black

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• 【Professional Hydraulic Door Closer】 IRONWALLS medium/heavy-duty door closer commercial is ANSI Grade 1 certified and has surpassed over 2 million door cycles in testing. It also holds a UL certification for a 3-hour fire rating, demonstrating its reliability and performance. Moreover, our door closer features fully adjustable spring sizes, closing and latch speed regulation valves, meeting ADA standards and compliance.
• 【6 Adjustable Spring Power Sizes】Our automatic door closer adjustable size is equipped with a fully adjustable spring, making it suitable for any interior or exterior commercial doors weighing up to 330lbs/150kg and measuring 29.5"-55.1"/75-140cm in width. It is perfect for various commercial door types, including hollow metal steel doors, commercial wood doors, and storefront aluminum doors.
• 【Dual Speed Control Valves & Delayed Action】Our automatic door closer lock features separate regulating valves for controlling closing and latching speeds, which are fully adjustable after installation. The adjustable delayed action valve allows the door to remain open for a set period before initiating the closing cycle. This feature enables you to customize your door closer to achieve the ideal soft swing speed and prevent doors from slamming shut on your customers.
• 【Enhanced Back-check Function】Our exterior door closer interior comes with an adjustable back-check valve that cushions the door as it nears the full open position. This feature is particularly useful for high-traffic entrances as it extends the lifespan of your door and closer by preventing pedestrians from slamming the door open.
• 【Flexible Installation】Each package of our commercial door closer heavy duty includes all necessary hardware for three types of mounting options (regular arm, top jamb, and parallel arm). We also provide various types of screws for mounting the door closer on wooden or metal doors. Furthermore, this door closing mechanism is compatible with both left and right opening doors, offering increased flexibility.