Skirt Rubber

What it is

Skirt rubber seals the gap between the loading chute or skirt boards and the moving belt so fines and dust stay on the belt instead of escaping into the transfer house. It is usually supplied in strips or blocks, sometimes with woven insertion, and clamped in adjustable holders so maintenance can lower the seal as it wears. Hardness and edge design affect sealing versus belt cover wear.

Effective skirting works with correct chute loading, belt troughing and sufficient freeboard. Rubber alone cannot fix a chute that dumps material off centre or floods the belt. South African plants handling wet coal, concentrate or crushed ore rely on well-maintained skirts to meet housekeeping and dust expectations.

Include belt width, trough angle, skirt length and material type in your skirt rubber quote. Mention whether you need rubber only or holders and clamps as well.

Use cases

Skirt rubber is a scheduled consumable at loading points, replaced when edges harden, glaze or wear to the point that dust escapes. Upgrades include dual-seal systems, low-friction compounds to reduce belt wear, and segmented blocks that allow partial replacement. New conveyors should have skirting designed with the chute, not added as an afterthought.

• Primary loading zone seals — contain product as it settles on the belt
• Secondary dust seals — tighter control on dusty products
• Clamp and holder replacements — restore adjustability when old steel is seized
• Full loading-point kits — rubber, clamps and skirt board upgrades together

Over-tightened skirting cooks the belt cover and raises power draw. Training crews to set light contact and inspect weekly usually beats buying exotic compounds without changing the habit. If the belt flutters in the loading zone because idlers are missing or spaced too far apart, fix support first — new skirt rubber cannot seal against a bouncing belt.

When ordering, specify whether you need continuous strip, segmented blocks or a proprietary cassette system. Segmented designs cost more upfront but reduce waste when only one section wears against a hot spot in the chute mouth.

Industries

Coal plants, ore processing, aggregate wash plants and cement raw mills are constant skirt rubber users. Fertilizer and grain facilities focus on dust at intake conveyors. Ports fight wind-blown fines at transfer towers. Underground transfers need compact clamps that crews can service in limited space.

Suppliers across South Africa stock common widths and can cut lengths to order. Remote sites benefit from holding spare strips in stores. Matching compound to oily or high-temperature product avoids premature swelling or hardening. Wash plants with high moisture should also confirm clamp steel and fasteners will not seize after a few wet months outdoors.

Why it matters

Escaped fines bury structure, seize return idlers and create respirable dust — an operational and compliance problem. Skirt rubber is inexpensive relative to the cleanup and belt damage it prevents when specified and adjusted correctly. Consistent sealing at the load zone also improves cleaner performance downstream because less material is forced into the belt cover in the first place.

Evaluate quotes on compound, dimensions and whether hardware is included. Combining skirt rubber with belt cleaners and chute work in one Conveyor Quotes request often yields a more coherent fix for chronic loading-point spillage than buying strips in isolation. Include belt width and trough angle so cut lengths arrive ready to fit during the available stop.