Discharge coefficient for a 3-Way Directional Valve in a water/glykol network

The documentation of for the 3-way Directional Valve says: "Refer to the valve data sheet". I do not find any data sheet. I have 250 l/min flow of water/glykol. I looking for a datasheet or literature for the discharge coeffcient.

Thank you alot.

[Mash]

Is the Discharge coefficient and the german "Wiederstandbeiwert" zeta the same? I found in Dubbel page 324 under Absperr- und Regelorgane the number zeta = 0.6. But there is also written that zeta = 4.8 for DIN-Valves. But simscape, says it cant be larger than 1. So zeta cant be the same...