Valent friction prop SNT-250

The VALENT SNT-250 friction prop is a modernised construction of the commonly known VALENT SN-400 friction props. The purpose of the modernisation was to obtain a constant, non-decreasing propping characteristics of the device. Buckling of the prop is prevented by a new type of footing plate of the lower prop, whose convex shape transmits the force at a uniform rate while the prop is being inclined.

The VALENT SNT-250 friction props are individual elements of lining whose purpose is to prop the roof in mining excavations: longwall and splitting excavations, and to reinforce the lining of gallery excavations. The props may form an independent lining or be used as elements reinforcing another type of lining. The series of types of the VALENT SNT-250 friction props includes fifteen principal prop sizes within the range from 710 mm to 3550 mm while pulled out.

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