Professional China Tunnel Ventilation - JULI® Flexible Oval Ventilation Duct – Foresight

Product Informations

JULI^® oval ventilation duct is made of PVC flexible fabric with polyester fiber as the base fabric and is coated with a PVC membrane on both sides. Polyester fiber can be chosen for different user requirements and environments. The PVC membrane is fire resistant with DIN4102 B1, NFPA701, EN13501, DIN75200, and antistatic properties; all are accompanied by an SGS test result.

JULI^® oval ventilation duct is made with two suspension fins outside. The angle can be customized according to the customer’s requirement. There are also two suspension fins connected with carabiner hooks and steel rope inside the duct to keep the oval shape.

suspension system

Single suspension fin

Double suspension fins

Single suspension patch

Double suspension patches

Coupling system

Zipper Coupling

Velcro Coupling

Eyelet Coupling

End ring Coupling

 Product Parameters

JULI® Oval Ventilation Ducting Technical Specification
Item	Unit
Diameter	mm	450-1650
Section length	m	5, 10, 20, 30, 50, 100, 200, 300
Color	-	Yellow, Orange, Black
Suspension	-	Double susopenison fins/patches
Sealing face sleeve	mm	150-250
Grommet spacing	mm	750
Coupling	-	Zipper/Velcro/Steel ring/Eyelet
Fire resistance	-	DIN4102 B1/EN13501/NFPA701/DIN75200
Antistatic	Ω	≤3 x 108
Packing	-	Pallet
Diameter(mm)	Dimension(mm)
	A	B
450	650	350
600	850	450
750	1100	550
800	1150	600
900	1300	700
1000	1400	750
1050	1500	800
1200	1700	900
1350	1950	1050
1500	2150	1150
1650	2300	1200
The above values are average for reference, allowing 10% tolerance. Customization is acceptable for all given values.

 Product Feature

◈ Used for low headroom or small mine tunnels with a limited height.
◈ All ducting and fittings are available in both layflat and spiral.
◈ Increased airflow by maximizing duct space.
◈ Welding inside suspension fins reduce air leakage rates.
◈ Polyester woven or knit fabric with a PVC coating on both sides.
◈ The flame resistance meets DIN4102 B1/EN13501/NFPA701/DIN75200 standards.
◈ Diameters ranging from 450 to 1650mm, other dimensions are amenable to customization.

Product Advantages