Choosing an original manufacturer (OEM factory) is key to ensuring hinge quality. Manufacturers with in-house production capabilities can strictly control the entire process from raw material procurement to final inspection, avoiding inconsistent quality control often associated with subcontracting or rebranding
<p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-family:Calibri; font-size:12.0000pt">Focusing on the theme "High-Performance Door & Window System Solutions," the company showcased cutting-edge innovative products, including:</span><span style="font-family:Calibri; font-size:12.0000pt">U-groove concealed casement window hardware system,</span><span style="font-family:Calibri; font-size:12.0000pt">Electric horizontal sliding window,</span><span style="font-family:Calibri; font-size:12.0000pt">Electric inward casement window,</span><span style="font-family:Calibri; font-size:12.0000pt">JTSM06/07 series lift-and-slide door hardware system,</span><span style="font-family:Calibri; font-size:12.0000pt">3HM1/NXC16 series tilt and turn hardware system</span>.</p> <p style="margin-left:72.0000pt"><!--[if !supportLists]--><!--[endif]--></p>
Regular maintenance is crucial for extending the service life of electric window openers. It is recommended to inspect the motor, wiring, and guide rails every three months, promptly removing dust and debris; avoid overloading; and regularly lubricate mechanical components to ensure smooth window operation.
Although door and window handles are small components, they directly affect daily usage convenience and safety.
3H Building Hardware will continue to uphold the development philosophy of "win-win cooperation and harmonious growth," focusing on advancing its expertise in door/window hardware and sealing systems.
DSF12
3H INC.
Item No. | DSF12 |
Size | / |
Application | top-hung/casement window |
Material | 304SS |
Surface Treatment | Natural |
Color | Natural |
Components | screws |
Function | durable,easy-installation,smooth-operation |
Package | Polybag |
Outstanding Feature:Telescopic and Positioning
Specification

Square telescopic limiter stay | |||
NO. | Item no. | A | B |
1 | DSF6 | 207 | 155 |
2 | DSF8 | 309 | 205 |
3 | DSF10 | 411 | 255 |
4 | DSF12 | 510 | 305 |
5 | DSF14 | 610 | 355 |
Product Description
1. Material:excellent stainless steel
2. Comply with JG/T128-2017 standards.
3. The telescopic limiter stays apply to top hung window to restrict the opening angle.
4. The telescopic limiter stay make the sash automatically lock at the designed position which contribute to ventilation,maintenance and protect the sash against strong wind.
5. Loose he telescopic limiter lockable status by softly elevating the sash ten close it.
Installation Introduction
The opening distance of limiter stay is relevant to installation position.The lower the installation position,
the smaller the opening distance.According to the window and door criterion,the opening distance of top-hung window shall be not more than 300mm.
2. Symmetrical installation of each pair of limiter stays is required and tolerance within 1mm.
3. Installation direction shall be consistent with graph showed,the bottom of limiter stay should be installed downward.
4. When closing it,pull directly back are not allowed,you should push out first and then pull back to close.
