ISO-LEN® Lining Solution
ISO-LEN® ultra-high-molecular-weight polyethylene (PE) liner is a non-toxic plastic liner with low friction, high impact strength and good abrasion.
Depending on application requirements and the type of bulk material, we offer a variety of designs to meet your needs. Please contact us for further details.
Advantages of plastic liners
Minimize material choking
Minimize material bridging
High impact resistance
Main structure protection
Low friction angle
Coal bunker lining
Silo tank lining
Sewage pipe lining
Grain silo lining
Gypsum silo lining
Railway cart liner
Bridging /Arching Problem
Only the cone portion of the bulk material is moving during discharge. Content in the silo bridging faces flow stoppage.
Only the centre portion of the bulk material is moving during discharge. The flow rate is unpredictable and material segregation and stoppage can be expected.
All bulk material is moving during discharge. The flow rate is predictable, material segregation is minimized and complete discharge can be expected.
Installation – Fastening methods and layouts
The drill-through fastening method is highly effective and economical, but not suitable for handling bulk material with liquid content and corrosion material.
Expansion bolt method
The expansion bolt or counter sunk screw with stradding dowel is one of the most efficient methods for mounting liners on concrete walls.
Welding stub method
The welding stub is a fast and efficient method for mounting liners on a metal or steel wall, but requires special tools like stub welding guns and ceramic brokable cups, which increases installation costs.
Welding washer: Typically for thinner sheets
Riveting: Typically for fixing onto steel walls
Power nail: Typically for fixing onto wooden walls
Chemical bolt: Typically for mounting on concrete
Sealing strip and edge protector
ISO-LEN lining material’s sealing strip and edge protector is an important part of its design. There are several factors to be considered. Firstly, the lining material and tank or chute wall have different thermal expansion rates. Therefore, there has to be sufficient expansion gaps to account for drastic temperature changes. Secondly, the edge of the liner is relatively weak. Should the liner edge be lifted up, bulk material may accumulate between the liner and tank or chute wall. The edge protector prevents this.
|MATERIAL||TEST DATA||MATERIAL||TEST DATA|
|ISO-LEN 1000 ( GUR 4120 )||100||PTFE||530|
|Cast Nylon ( PA6G)||150||PMMA ( Acrylic )||1800|
|PE-HD (high molecular weight PE )||400||Phenolic Fiber||2500|
|Polyvinyl Chloride (PVC)||920||Beech Wood||2700|
|Extruded Nylon 66 (PA 66)||160||Epoxy Resin ( 50% quartz)||3400|
Note: Sand slurry test method as per ISO 15527 is a well-recognized test method for a material’s relative volumetric wear rate. The data provides a good indicative wear abrasion rate of different materials, and the data above shows the wear resistance of ISO-LEN 1000 against other common lining materials.
|MATERIAL||MATERIAL SIZE (MM)||CONCRETE WALL||STAINLESS STEEL WALL (2B)||UHME-PE WALL|
|Limestone (Dry)||Up to 5||–||32.2||17.6|
|Limestone (4% moisture)||45-65||–||79||58|
|Gypsum (7% moisture)||50-200||No flow||No flow||73|
|Raw Gypsum (Dry)||0-2||36.1||34.8||11|
|Sub-bituminous Coal (35% moisture)||Random||—||74||64|
|Sub-bituminous Coal (33% moisture)||Random||—||76||60|
Note: There are economical benefits to building a hopper and silo with lower wall angles having mass flow. The cost savings can be significant; the building structure height and its downstream facilities’ structure height are both reduced.