Valve Flow Co-efficient (Cv)

One of the primary costs after the initial capital outlay is running costs, especially in a pump station. A valve’s Cv determines the pressure drop between the inlet and outlet ports of the valve. The lower the pressure drop the higher the Cv, which in turn results in lower power consumption of the pump. We at Hydrocore have modelled a standard globe valve (SGV) to determine its Cv.

 

The calculator works out the power penalty cost of a Hydrocore Isolating Valve versus a SGV. As is evident, the cost savings using a Hydrocore Isolating Valve versus a SGV are astronomical even within the first couple of years. Assuming that the price of electricity is not going to go down in the future, those cost savings will only increase.

Valve Flow Co-efficient.png

Hydrocore Isolating Valve

Standard 

Globe Valve

Isolating

Valves

Size

(NB / Inch)

Max. Pressure (bar)

Flow Coefficient (Cv)

50NB (2")

80NB (3")

100NB (4")

150NB (6")

200NB (8")

250NB (10")

300NB (12")

250

250

250

160

160

160

160

63

161

235

525

1086

1464

1936

Non-return

Valves

Size

(NB / Inch)

150NB (6")

200NB (8")

250NB (10")

300NB (12")

Max. Pressure (bar)

160

160

160

160

Flow Coefficient (Cv)

802

1583

2867

2978

Max. Flow Rate

(litres / second)

9

25

38

117

152

233

337

Max. Flow Rate

(litres / second)

120

180

300

380

Figure 4.png

Hydrocore Non-Return Valve

Figure 5.png

Standard

Non-Return Valve