Consider an oilhydraulic lifting system consisting of a cont
     Consider an oil-hydraulic lifting system consisting of a control valve and a single-rod cylinder. The load to be lifted is 3000kg. The flow across each control port obeys a Bernoulli form of pressure/flow characteristic such that @ 601itres/min the pressure drop across a port is 3bar. Calculate the supply pressure needed to lift the load. Assume rho = 860kg/m^3 and mu = 0.02Ns/m^2   
  
  Solution
From the given data Pressure = row.g.h
= 45000 pascal

