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Seal design also varies, with common designs being single-acting, double-acting, and U-cup seals
hydraulic ram oil seals. The choice depends on the specific application requirements, such as pressure, speed, and duty cycle. Additionally, some advanced designs incorporate anti-extrusion rings to prevent seal deformation under high pressure.

3. Demand Fluctuations The demand for asphalt shingles can vary seasonally and economically. In the peak construction season, typically spring and summer, demand increases, which can drive prices up. The overall health of the housing market also plays a crucial role; when new home constructions and renovations rise, so does the need for roofing materials.
prices on asphalt shingles
