Generally, the loss coefficient (K value) for pulp suspensions in a given valve or fitting exceeds the loss coefficient for water in the same valve or fitting.

In all regions of the friction loss curve for pulp, the loss due to valves and fittings is added to the pulp friction loss and is computed using the equation shown below:

   HL = KVē/2g
      Where,
         HL = friction loss due to valves and fittings (m)
         K = loss coefficient for a given valve or fitting
         V = bulk velocity (m/s)
         g = acceleration due to gravity (9.81 m/sē)

To account for the increased loss due to the pulp suspension, PIPE-FLO Stock increases the K value for a valve or fitting by 20 percent for each 1 percent increase in oven-dried stock consistency over 2%:

   K(adj) = K * [1 + 0.2 * (C - 2)]
      Where,
         K(adj) = K value adjusted for pulp
         K = non-adjusted K value
         C = oven-dried stock consistency