Rothenberger Refrigeration and Air Conditioning Catalogue Page 56
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GOOD TO KNOW Pull bending Symbols L1 L2 a L LW AW LM LR 90° 180° a LW 0° = Leg length = Lay out length = Total length of the pipe piece = Distance / pipe end—wall = Distance / pipe middle—wall = Minimum length¹ = Reserve length¹ 45°-arc 90°-arc 180°-arc g ra diu s ing L1 din nd ra diu in g ra di us s L1 ben be nd L1 be L2 L 2 L2 L = L1 + L2 a = L 1 + LR L = L 1 + L 2 – LM a = L 1 – LR L = L 1 + L 2 + LM a = L 1 – LR 5 Calculation examples ROBEND 4000 / ROBEND 4000 E Aw Wall Lw Installation in corner areas L W = 1,200 mm A W = 30 mm Pipe-Ø 12 mm, 90°-arc L1 Specifications: a Sought after: Leg length L 1 Applied size a Solution: Summary from the ROBEND 4000 / ROBEND 4000 E Leg length L 1 = L W – A W = 1,200 – 30 = 1,170 mm Applied size a = L 1 – L R = 1,170 – 42 = 1,128 mm; L R … Tabular value 56 1) All sizes listed are standards and are dependant on the material and the wall thickness. Bending specific sizes based on the bending radius tabular value.
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