Methods of prevention Waterhammer Analysis & Design Benefits of ABS Disadvantages of ABS Low modulus hence low Low pressure rating wavespeed (celerity) and Low surface hence low increased pressure roughness delays Instantaneous stress pressure decay Longer valve closure property values Vacuum Resistance times Fatigue Resistance Notches at sockets Increased number of Elastic Follow On supports Waterhammer Analysis & Design ABS has lower wave speed than PVC and GRP Wavespeed for steel 1100-1400 m/s Wavespeed varies with support design and jointing Waterhammer Analysis & Design A separate demonstration of waterhammer analysis will now be shown using AFT's Impulse software. Waterhammer Analysis & Design Mitigation Measures Stronger pipework to withstand Surge anticipation valves
two lower bolts. The lower half cannot be illustration). the timing belt. removed at this stage. 19 Remove the bolts and lift off the tensioner 28 Refit the hoses to the water pump. 16 Using a dab of quick drying paint, mark and, where fitted, the tensioning spring (see 29 Refit the timing belt cover(s). the teeth of the timing belt and their notches illustration). 30 Refit the alternator drivebelt and adjust its 20 Slacken the clips and disconnect the tension as described in Chapter 1. hoses at the water pump. 31 On carburettor engines, refit the air 21 Undo the four bolts and remove the pump cleaner.
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