压力罐选型（波义耳定律）

压力罐选型取决于所需的关键点是泵流量和压力开关设置
建议减少1-2分钟，以减少管道、泵端的短周期损失
频繁启动和停止，会缩短泵及控制器使用寿命
 

定压供水选型：

Example: 流量50LPM
1.VF = 50LPM = 50 Litres draw off volume
(minimum 1 minute between pump starts)
2.PA = Atmospheric Pressure = 14.7Psi
3.P1 = Pre-Charge Tank Air Pressure = 68Psi
4.P2 = Cut-in Pressure = 70Psi
5.P3 = Cut-out Pressure = 90Psi
6.DF = Draw Down Coefficient
7.Tv = Pressure Tank Volume

                       
 

Wet Tank Example(NB: wet tank P1=0)

DF= (14.7 / 84.7) - (14.7 / 104.7)
     = (0.174) - (0.140)
     =  0.034
                 
TV= (50 / 0.034)
    =1470 Litre tank volume     

 

Diaphragm Tank Example

DF= (82.7 / 84.7) - (82.7 / 104.7)
     = (0.976) - (0.790)
     =  0.186
                 
TV= (50 / 0.186)
    =270 Litre tank volume