Detailed Description
YVFB vs YFFB — The Material Difference
Both YVFB and YFFB are flat elevator traveling cables with copper conductors, steel wire suspension, and flat construction. The difference is in the insulation material:
| Property | YVFB | YFFB |
|---|---|---|
| Insulation material | PVC (polyvinyl chloride) | Fluoroplastic (FEP/F46) |
| Temperature rating | 70°C | 150–200°C |
| Cost | Lower (baseline) | Higher (2–3× PVC) |
| Flame retardancy | Good (IEC 60332-1-2) | Excellent (inherently flame-retardant) |
| Smoke emission | Moderate | Very low |
| Halogen content | Contains chlorine | Halogen-free (FEP) or low-halogen |
| Chemical resistance | Moderate | Excellent |
| Best for | Standard indoor elevators | High-temperature shaft environments; fire safety-critical; chemical exposure |
YVFB is the standard PVC-insulated elevator traveling cable — specified for the vast majority of indoor elevator installations where the shaft environment is temperature-controlled, dry, and standard fire safety requirements apply (flame-retardant per IEC 60332-1-2).
YFFB is the premium specification — specified where the shaft environment presents elevated temperatures (glass-walled shafts in hot climates, industrial furnaces/buildings), fire safety requirements exceed standard (low smoke, low toxicity), or chemical exposure exists (industrial elevators in chemical plants, paint shops). The FEP/F46 fluoroplastic insulation handles continuous operating temperatures of 150–200°C compared to PVC's 70°C.
YVFB in Elevator Standards
YVFB is defined in Chinese elevator cable standards and is functionally equivalent to international elevator traveling cable standards (such as EN 50214 in Europe or UL 62 elevator traveling cable in North America). The key equivalence points:
- Conductor: IEC 60228 Class 5 (finely stranded bare copper)
- Insulation: PVC, 70°C temperature class
- Voltage: 300/500 V
- Construction: Flat, steel wire suspension elements
- Flame retardancy: IEC 60332-1-2 (single cable vertical flame test)
Core Allocation for YVFB — Common Configurations
YVFB cables are manufactured in standard core configurations matched to common elevator controller requirements:
| Configuration | Core Count | Typical Application |
|---|---|---|
| YVFB 12×0.75 | 12 | Basic residential elevator (2–6 floors): car light, door, buttons, intercom, safety |
| YVFB 20×0.75 | 20 | Standard passenger elevator (6–15 floors): + floor display, fan, emergency circuits |
| YVFB 24×0.75 + 4×1.5 | 28 (mixed) | Full-featured passenger elevator: + load weighing, access control, inspection |
| YVFB 36×0.75 | 36 | High-feature commercial elevator: + CCTV, destination dispatch, BMS |
| YVFB 48×0.75 | 48 | Premium office tower elevator: + full digital signage, multiple camera feeds |
Mixed cross-section configurations (e.g., 0.75 mm² for signals + 1.5 mm² for power circuits) are standard — power cores for car lighting and door operator are specified at the larger cross-section.
Yichi YVFB Manufacturing
- Standardized configurations in stock: Common YVFB configurations (12×0.75, 20×0.75, 24×0.75, 36×0.75) are maintained in production inventory for fast delivery — custom configurations manufactured to order
- PVC jacket compound optimized for elevator: Formulated for low smoke, good flexibility, and consistent color (black or grey) — no batch-to-batch color variation
- Steel wire galvanizing verified: Zinc coating thickness ≥50 g/m² for indoor elevator shafts — prevents corrosion at the jacket-to-air transition at anchorage points over the elevator's 20-year service life
- Bend tested per elevator standard: Reciprocating bend test at 400 mm radius, >3 000 000 cycles minimum. Acceptance: zero conductor breaks, no jacket cracks visible under 10× magnification