diff --git a/IBPSA/Fluid/FixedResistances/CheckValve.mo b/IBPSA/Fluid/FixedResistances/CheckValve.mo
index c14704ed34..2ba8be8f9f 100644
--- a/IBPSA/Fluid/FixedResistances/CheckValve.mo
+++ b/IBPSA/Fluid/FixedResistances/CheckValve.mo
@@ -153,21 +153,19 @@ The basic flow function
with regularization near the origin, is used to compute the mass flow rate
through the fully closed and fully open valve, respectively.
The valve is considered fully closed when subjected to a negative pressure drop,
-and its flow coefficient k is then equal to l * Kv_SI
+and its flow coefficient k is then equal to l * Kv_SI
,
where Kv_SI
is equal to Kv
but in SI units.
-The valve is considered fully open when the pressure drop exceeds
+The valve is considered fully open when the pressure drop exceeds
dpValve_closing
,
and its flow coefficient k is then equal to Kv_SI
.
-For valve positions between these two extremes, a quintic spline interpolation
-is applied to determine the mass flow rate as a function of
+For valve positions between these two extremes, a quintic spline interpolation
+is applied to determine the mass flow rate as a function of
the pressure drop across the valve.
The parameters m_flow_nominal
and dpValve_nominal
determine the flow coefficient of the check valve when it is fully open.
-A typical value for a nominal flow rate of 1 m/s is
-dpValve_nominal = 3400 Pa
.
The leakage ratio l
determines the minimum flow coefficient,
for negative pressure differences.
The parameter dpFixed_nominal
allows to include a series