Introduction:
“SL” Negative ventilation hose has two structures: one type is that the end coil is made of cold-drawing
steel wire with end coil distance 150~600mm, and the other is that ducting connected with spiral steel
ring made of spring steel wire with end coil distance 150~600mm.
Unique quality
Quality standard abides by GB/T 9900-2008. 

Characters ：
•Large air flow
•Long distance air supply
•Low air leakage
•Low air resistance
•Long service life
•Easy installation
•Safe and Environmental protection
•Great value
Usage ：
Negative Ventilation hose is also named as drawing-out type ventilation hose and widely used in
underground project of coal mines, tunnels, subway, ships and so on.

Description ：
Working temperature: -20℃ ~ 80 ℃
Diameter: 0.3m, 0.4m, 0.6m, 0.8m, 1m, 1.2m, 1.4m, 1.6m, 1.8m, 2m, 2.2m
Standard Length: 10m
Standard color: Yellow, Black, Green
Connection: Zipper connection