In steel bunkers and silos, pitting occurs on surface as corrosion, wear, erosion and humidity ratios increase. These factors increase friction. Especially in winter, water collects on surface causing freezing and sticking. Necessary flow angles get bigger and bunker design becomes more difficult.

Bridging/Blockage: With compression over time, bridging occurs and flow is interrupted. Flow becomes irregular; it may even stop completely. It may be necessary to halt the system and eliminate bridging with long and difficult efforts.

Channel Flow/Irregular Flow: In conical part of bunkers, inappropriate friction between wall of bunker and material causes compression and flow continues only in the middle. Narrowing of flow decreases stock capacity, causes irregular flow and distorts level control parameters. Motionless part of bulky material in bunker may decompose over time. Even costly and difficult operations such as air shocking, air hammers and bottlings are often insufficient.

In more extreme environmental and work conditions, with inflammable, explosive materials and with those that accumulate static electric, Ulpolen^®1000 types with special additives that have even more superior technical properties should be preferred.

• High impact resistance
• High wear resistance. It provides usage life three times longer than that of steel. Even ice does not stick onto it.
• Low friction coefficient
• Complete resistance to humidity and weather
• Wide operating temperature interval
• Lightweight and economical with its low density. Ulpolen is lighter than water, stronger than steel.

• Steel and concrete bunkers, silos and chutes