automatic small light simple fire door buffer hydraulic spring fire protection door closer door closer 自动小型轻型简易防火门缓冲液压弹簧消防闭门器关门器

051Y small circular machine, 20 kilograms per box, 20 units per box

Carton dimensions: 390*260*326 MM

Suitable for doors weighing 25-45 KG

Generally, it defaults to 180 degrees automatically. 90 degrees requires contact with the seller via phone.

The images below depict the 051 small round machine model from this link.Corresponding product size diagrams and actual photos

The following are images of other model sizes.Please clickBuy NowProducts of all models!

The following categories are fire protection types, with stable quality and high sales volume.

The following models are extra-large and extremely heavy types.

The following models are bolded, reinforced, thickened, and designed for extended lifespan.

 The following models are export versions with oil leakage prevention features

By default, no positioning is enabled. If you need positioning, please contact customer service.

The 90-degree positioning feature adds one more function: when the door is opened to 90°–170°, it can stop in place and won’t move unless a slight push is applied to close it. Without this positioning feature, the 180-degree automatic door closes automatically at any angle.