müller coax group

计算程序

我们已经为您编辑了一些计算程序。可以为液体和气体计算kv值,流量和压差。在计算气体工况时,低于临界(P2 > P 1/2)和高于临界(P2 < P1/2)有一个额外的区别。

所有计算都是经验公式,也就是简化了各个案例,所以只能用于指定的工况。

计算程序

液体的计算

kv

为了计算kv值,必须提供流量Q、入口介质密度ρ1和阀门上的压差(Δp)。

Q = m³/h = m³/h
ρ1 = kg/m³
Δp = bar

 

流量

为了计算流量Q,必须提供kv值、介质的阀前密度ρ1和阀门的压差(Δp)。

kv = m³/h = m³/h
ρ1 = kg/m³
Δp = bar

 

压差

为了计算压差(Δp),必须提供kv值、介质的阀门密度ρ1和流量Q。

kv = m³/h = bar
ρ1 = kg/m³
Q = m³/h

 

气体的计算

kv

为了计算kv值,必须提供在1013 hPa 和 0°C时的体积流量QN、介质的标准密度ρN、阀门上的压差(Δp)、阀门下游压力P2和入口介质温度。

Qn = Nm³/h = m³/h
ρn = kg/Nm³
Δp = bar
p2 = bar = m³/h
T1 =
°C
°F

 

流量

为了计算流量QN,必须提供kv值、介质的标准密度ρN、阀门上的压差(Δp)、阀门下游压力P2和入口介质温度。

kv = m³/h = Nm³/h
ρn = kg/Nm³
Δp = bar
p2 = bar = Nm³/h
T1 =
°C
°F

 

压差

为了计算压差,必须提供kv值、在1013 hPa 和 0°C时的体积流量QN、介质的标准密度ρN、阀门下游压力P2和入口介质温度。

kv = m³/h = bar
Qn = Nm³/h
ρn = kg/Nm³
p2 = bar     if
T1 =
°C
°F

 

Flow Q for liquids in l/min

DN
in
mm
Flow Velocity
0,5
m/s
1,0
m/s
1,5
m/s
2,0
m/s
3,0
m/s
4,0
m/s
5,0
m/s
7,0
m/s
8,0
m/s
10,0
m/s
81.53.04.56.09.012.115.121.124.130.2
102.44.77.19.414.118.823.633.037.747.1
123.46.810.213.620.427.133.947.554.367.9
155.310.615.921.231.842.453.074.284.8106.0
166.012.118.124.136.248.360.384.496.5120.6
209.418.828.337.756.575.494.2131.9150.8188.5
2514.729.544.258.988.4117.8147.3206.2235.6294.5
3224.148.372.496.5144.8193.0241.3337.8386.0482.5
4037.775.4113.1150.8226.2301.6377.0527.8603.2754.0
5058.9117.8176.7235.6353.4471.2589.0824.7942.51178.1
6599.5199.1298.6398.2597.3796.4995.51393.71592.81991.0
80150.8301.6452.4603.2904.81206.41508.02111.22412.73015.9
100235.6471.2706.9942.51413.71885.02356.23298.73769.94712.4
125368.2736.31104.51472.62208.92945.23681.65154.25890.57363.1
150530.11060.31590.42120.63180.94241.25301.47422.08482.310602.9
200942.51885.02827.43769.95654.97539.89424.813194.715079.618849.6
2501472.62945.24417.95890.58835.711781.014726.220616.723561.929452.4

To avoid hydraulic shocks in pipelines, the flow velocities must be taken into account when designing valves for liquids.