<p>the sequential door closer ensures the doors close in the "right order," while the door closer ensures they "close properly." Understanding their differences is key to selecting the right components that meet safety standards while enhancing usability.for reliable door control hardware, consider 3H Hardware</p>
<p>the sequential door closer ensures the doors close in the "right order," while the door closer ensures they "close properly." Understanding their differences is key to selecting the right components that meet safety standards while enhancing usability.for reliable door control hardware, consider 3H Hardware</p>
Aside from choosing the right materials, regular maintenance is essential. Periodically cleaning hardware surfaces to remove salt, dust, and accumulated water can effectively delay rust formation. Additionally, opt for accessories designed with drainage holes or channels to help eliminate water buildup and reduce the risk of corrosion.
This exhibition represents a dual breakthrough for 3H Building Hardware in terms of brand influence and market expansion. It not only strengthens the company’s position in the domestic market but, more importantly, opens the door to the ASEAN market.
remote-window-operator HCD
3H INC.
Item No. | window operator |
Size | / |
Application | High window /clere story/ |
Load Bearing | 80KG/per set |
Material | stainless steel/zinc alloy |
Surface Treatment | powder coating |
Color | Optional |
Components | screws |
Function | durable,easy-installation,smooth-operation |
Specification

Product Description
1. Manual Operated chain type window opening system has wide application range and easy installation;
2. The chain box has the single chain and double chain structure; it can be combined into a single sash or multiple sashes to open and lock’
3. The distance and trust are large, the maximum distance: 500mm; and large trust:300N;
4. The length of manual operated rod should not be greater than 4000mm,
5. When the width of sash is larger than 1000mm, the multiple chain type or double chain type opener should be selected.
6. The color of chain box can be customized according to the customers’ requirements
Item No. | window operator |
Size | / |
Application | High window /clere story/ |
Load Bearing | 80KG/per set |
Material | stainless steel/zinc alloy |
Surface Treatment | powder coating |
Color | Optional |
Components | screws |
Function | durable,easy-installation,smooth-operation |
Specification

Product Description
1. Manual Operated chain type window opening system has wide application range and easy installation;
2. The chain box has the single chain and double chain structure; it can be combined into a single sash or multiple sashes to open and lock’
3. The distance and trust are large, the maximum distance: 500mm; and large trust:300N;
4. The length of manual operated rod should not be greater than 4000mm,
5. When the width of sash is larger than 1000mm, the multiple chain type or double chain type opener should be selected.
6. The color of chain box can be customized according to the customers’ requirements
