Specification

Product Description 

1. Apply for top hung windows.

2. Applicable window in max height 1500mm, width from 1100-1200mm..

3. Using excellent stainless steel 304 material.

4. Durable,easy-installation,smooth-operation

Definition:The device that connects the sash and frame so that the window can be opened and closed.

Performance index:

1. Operating standard:JG/T127-2017.

2. The difference between  opening angle and nominal opening angle is not more than 3 degrees.

3. Friction stay can reach 10-30N when not tighten.

4. The maximum of friction stay is not more than 80 N when tighten.

5. The residual deformation is not more than 2mm under 500N.

6. Repeatedly open and close 30,000 times, the components don't have obvious damage,and still have using function.

Concealed window hinges are made of stainless-steel mounting plates and steel link arms.Widely used with crank-out & push-out casement windows, crank-out & push-out awning windows, tilt-in hopper windows & transom windows. Freely adjustable，smooth and easy to operate when open and close.