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How to adjust the closing force of the sliding door with the door closer

December 08 , 2022

What is a door closer? The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and released to automatically close the door. It has the function of a spring door and can ensure that the door is closed to the initial position accurately and in time after it is opened. 


The working principle of the door closer is:


When the door is opened, the door body drives the connecting rod to move, and the transmission gear is rotated to drive the rack plunger to move to the right. When the plunger moves to the right, the spring is compressed, and the hydraulic oil in the right chamber is also compressed. The one-way valve ball on the left side of the plunger is opened under the effect of oil pressure, and the hydraulic oil in the right cavity flows into the left cavity through the one-way valve. When the door opening process is completed, because the spring is compressed during the opening process, the accumulated elastic potential energy is released, and the plunger is pushed to the left, driving the transmission gear and the door closer connecting rod to rotate, and the door is closed. If the door closing force is too large, it will seriously affect the service life of the door, especially the sliding door, so how do we use the door closer to adjust the closing force of the sliding door? We can divide it into the following three steps.

door closer

Step one:


The door closer can only be installed on the upper part of the sliding door leaf near the hinge side. There is one end of the speed regulating screw on the body, facing the hinge. Otherwise, the door will not be opened normally. If it is destroyed, use four screws to fix the body on the door leaf, then put the lever into the upper end of the gear shaft, install the cap on the other end, and tighten the fastening screws.


Step two:


Install the connecting rod, and fix the connecting rod on the door frame with two screws. The hand-held connecting rod is at right angles to the upper door frame. Loosen the lock nut, adjust the connecting rod to a suitable length, gently move the lever, so that the lever pin is just inserted into the hole at the end of the connecting rod, and check that the connecting rod is at right angles to the upper door frame. Put the washer on and fasten with button head screws. Lock the nuts and the installation is complete.


Step three:


Adjust the closing speed of the sliding door. The closing speed has been adjusted. If the speed needs to be changed, turn the speed adjusting screw as shown in the figure.


What problems should the hydraulic door closers pay attention to when adjusting the closing force of the sliding door?


(1) The exterior-mounted top door closer is not suitable for two-way opening doors.


(2) The speed adjustment screw controls the opening and closing speed of the door. Clockwise is slow, counterclockwise is fast.


(3) The rest of the screws and sealing parts cannot be twisted at will to prevent oil leakage.

Author:Written by Ms.Vivian He from S4A INDUSTRIAL CO.,LIMITED

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  S4A-Security For All.S4A Industrial Co., Limited, Founded in 2010, We have been dedicating in access control production R&D and sales for 10year till now. With the belief that we do one thing well in a lifetime, our CEO has been in this industry for 15 years. During the past 10 years, our products have been exported to various countries and regions. And 90% of customers come from the recommendations of cooperative customers, and 80% of the turnover comes from cooperative customers in the past 10years.Your business is a plant, we are the gardener, our mission is to water and fertilize the plant, and make it become the towering tree. We attach great importance to the partner's appeal, customer's suggestions, and feedbacks. To strengthen Product quality awareness, client's service awareness. Our clients and S4A are on the same path walking for many years.       S4A's future would be even more brilliant, this is related to all of our staff's working sweat. When you join this team, you will feel an invisible power to drive walk forward. S4A mainly produces a series of security Door Access Control such as:Network Access Controller, Locker board, Electromagnetic lock, Standalone door Controller, Automatic door opener, etcOur team can manufacture products, sell products, and do after-sales.In the realm of access control, one company stands out for its unwavering commitment to providing security services for everyone. S4A, which stands for "Security for All," has been at the forefront of access control technology for the past 13 years. With its own state-of-the-art factory and a strong focus on research and development, S4A has continuously delivered cutting-edge access control machines with the latest functions. Their dedication to product quality, customer feedback, practicability, and cost performance sets them apart as a leader in the industry.Factory and R&D Expertise:S4A takes pride in its fully-equipped factory, where skilled engineers and technicians work tirelessly to develop and manufacture access control solutions that meet the highest standards. The company's investment in research and development has resulted in a steady stream of innovative products that cater to evolving security needs.By staying ahead of the curve, S4A ensures that their customers have access to the latest advancements in access control technology.Quality Assurance and Customer Feedback:At S4A, product quality is of paramount importance. The company adheres to rigorous quality control procedures throughout the manufacturing process to guarantee the reliability and durability of their access control machines. Each product undergoes comprehensive testing to ensure it meets industry standards and exceeds customer expectations. S4A also places great value on customer feedback, actively seeking input to continuously improve their products and services. By listening to their customers, S4A maintains a customer-centric approach and delivers solutions that address real-world security challenges.Practicability and Cost Performance:S4A understands that access control solutions must not only be technologically advanced but also practical and cost-effective. The company's emphasis on practicability means that their products are designed to be user-friendly, easily integrated into existing systems, and adaptable to various environments. S4A's access control machines are known for their intuitive interfaces, simple installation processes, and seamless compatibility with other security systems. Additionally, S4A strives to provide cost-effective solutions without compromising on quality. Their competitive pricing ensures that security is accessible to businesses and individuals of all sizes.With 13 years of industry experience, S4A has cemented its position as a leading provider of access control solutions. Through their dedication to "Security for All," the company has set a benchmark for excellence in product quality, customer satisfaction,practicability, and cost performance. S4A's in-house factory and research and development capabilities enable them to stay at the forefront of technological advancements in the field of access control. As the company continues to evolve and innovate, S4A remains committed to empowering individuals and organizations with the highest level of security, ensuring that everyone can enjoy the peace of mind that comes with a reliable and efficient access control system.We can create value for you!Quality takes great importance for a company's credibility, and buyer's every penny spend must worth it. That is our most basic principle. Our business mainly for wholesale, so we could offer large quantities at competitive prices. During the past 10 years, We work hard to create value for our customers, and with our help, customers have an increasing market share. 99% of the customer...<
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