Belt Carcass

DELTAmine plied range
The GI belt is composed of several fabrics separated by flame-resistant rubber. The warp in the fabric is generally in polyester to achieve low elongation, and the weft is in polyamide to ensure good throughing, flexibility and impact resistance.

Standard range
The standard range is PIW 200 to PIW 1500 with a maximum of 5 plies.

Alternative belts may of course be proposed, as for example, with polyamide in the warp or strong weft construction and with stronger fastener holding properties, or made to match particular client specifications.

DYNAmine Solid Woven Range
The different belts all have a PVC impregnated solid-woven textile carcass, which follows a complex pattern.

The carcass is made of a textile fabric which is designed to the requirements regarding belt elongation, flexibility for troughing, fastener holding retention and resistance to impact and edge damage.

The warp in the fabric is either in polyester (for a low elongation belt), or in polyamide (for special impact resistance). The weft is mainly polyamide to ensure throughing flexibility. Cotton ply warp yarn is added on top and bottom of the fabric to protect the carcass against impact and potential cuts or damage. This textile fabric is then impregnated with PVC paste, which makes it compact, fire resistant and totally impervious to moisture or other degradation, while retaining its mechanical properties.

In DEPREUX's impregnation process the PVC impregnated rate is controlled, and the carcass is stretched in the machine. This feature allows the belt to have optimum flexibility and low elongation.

DELTAmine range

US designation Maximum Working Tension (WT)	Number of plies	British Breaking Strength (BS) with a safety factor of 10(.) in N/mm	Warp strength PIW, min.	Nominal carcass thickness (inch), min.	Nominal carcass specific weight pound per 1" wide and 1 foot long
PIW220 PIW300 PIW300 PIW400 PIW500 PIW500 PIW600 PIW600 PIW600 PIW750 PIW1000 PIW1000 PIW1200 PIW1200	2 2 3 2 4 2 2 3 4 3 4 5 4 5	400/2 500/2 500/3 630/2 800/4 800/2 1000/2 1000/3 1000/4 1250/3 1600/4 1600/5 2000/4 2000/5	2200 3000 3000 4000 5000 5000 6000 6000 6000 7500 10000 10000 12000 12000	0.14" 0.16" 0.14" 0.19" 0.22" 0.27" 0.28" 0.20" 0.22" 0.20" 0.38" 0.39" 0.36" 0.42"	0.039 0.043 0.058 0.060 0.094 0.060 0.080 0.070 1.103 0.097 0.135 0.144 0.157 0.039
Technical note: In the USA, belts are defined by the maximum safe working tension (WT). In the metric system, the belts are defined in breaking strength (BS) and not operating tension. The two parameters are linked by the formula BS=SF x WT* where SF is the safety factor. Generally in textile belts SF ranges from 8 to 12. The above tables give the BS correspondence in N/mm considering an average safety factor of 10. Example: -PIW 400 will give a 710/1 (type 4) belt if the safety factor is 10 -PIW 400 will give a 580/1 (type 3) belt if the safety factor of 8 can be considered.

DYNAmine range

US designation Maximum Working Tension (WT)	British Breaking Strength (BS) with a safety factor of 10(.) in N/mm	Warp strength PIW, min.	Warp strength PIW, min.	Nominal carcass thickness (inch), min.	Nominal carcass specific weight pound per 1" wide and 1 foot long
PIW220 PIW330 PIW400 PIW500 PIW650 PIW700 PIW800 PIW900 PIW1000 PIW1200 PIW1500 PIW1800	400/1 (type 2) 580/1(type 3) 710/3 (type 4) 875/1(type 5) 1140/1(type 6) 1250/1(type 7) 1400/1(type 8) 1600/0 (type 9) 1750/1(type 10) 2100/1(type 12) 2625/1(type 15) 3150/1(type 18)	2200 3300 4000 5000 6000 7000 8000 9000 10000 12000 15000 18000	915 1400 1515 1830 2000 2000 2000 2570 2570 2570 2570 2570	0.12" 0.23" 0.25" 0.28" 0.302" 0.31" 0.34" 0.36" 0.38" 0.42" 0.50" 0.61"	0.068 0.111 0.12 0.137 0.162 0.171 0.188 0.192 1.197 0.214 0.248 0.291

PVC

Nitrile
(NI and PVCNI)

Cloroprene

Slope / inclination
(approximate)

Cover thickness
(theoretical maximum)

Specific weight
of cover

13°

5/32" per side

1.40

16° to 20°

1/4" per side or more for rubber 5/32" for PVC

1.35

20° to 22°

1/4" per side or more for rubber 5/32" for PVC

1.35

Belt covers:

The belts are designed by DEPREUX as follows: DYNAmine PIW 800/1 - 54" - 1/16 x 1/16 - BS

DYNAmine= solid-woven carcass
PVC= belt with PVC on both faces
PIW 800-max.=working tension 800 pounds per inch wide
1=one ply
54"= width in inches
1/16 x 1/16= upper and lower thickness in inches
BS= British Standard for underground