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Water Hammer Calculator

Estimate pressure surge from rapid valve closure

Input Parameters

Typical wave speed: 1000-1400 m/s for water in steel pipe

About Water Hammer

Joukowsky equation: ΔP = ρ × a × Δv (for instantaneous closure)

Critical time = 2L/a. If valve closes faster than critical time, full surge pressure occurs.

Mitigation: slow valve closure, surge tanks, air chambers, pressure relief valves.

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