HiFlo Valves
Use the following flow chart and technical specifications to determine the correct Check Valve for your requirements
Because of the unrestricted Full Flow design of the Hansen CV you will often find you will be able to choose a smaller Hansen CV than most other check valves on the market.

As the Flow Chart is based on head loss across a fully opened diaphragm firstly refer to the table below headed "Flow Required to Fully Open Diaphragm" and check which valves sizes will not be fully open with your system flow. Example; 300lpm will not fully open a CV63. Then find your system flow across the bottom of the chart on this page and take a line vertically up the chart to size a valve with an acceptable head loss for your system.

Example; with a flow of 300lpm a CV50 will have a head loss of 1.1m and a CV32 will have a head loss of 4.4m.
Maximum Recommended Working Pressure: @ 20°C
VALVE CV25 CV32 CV40 CV50 CV63
psi 145 145 145 145 145
Bar 10 10 10 10 10
kPa 1000 1000 1000 1000 1000
Pressure required for initial flow:
VALVE CV25 CV32 CV40 CV50 CV63
psi 0.5 0.5 0.5 0.5 0.5
kPa 3.5 3.5 3.5 3.5 3.5
Flow required to fully open diaphragm:
VALVE CV25 CV32 CV40 CV50 CV63
l/min 110 142 158 225 330
Connection: female BSPT
VALVE CV25 CV32 CV40 CV50 CV63
Thread Size 1" 1 1/4" 1 1/2" 2" 2 1/2"
Dimensions: (mm)
VALVE CV25 CV32 CV40 CV50 CV63
Width 69 87 99 123 152
length 102 122 133 164 198
Height 74 94 106 132 180
Installation: Valve will operate at any angle.
Head Loss: See chart above.
Maximum operating temperature: 60°C
(Degrees Celsius)
Note: All references to gallons are in imperial gallons.
Hansen have tested all its products for use with cold water up to a maximum temperature of 60°C (140°F). We do not recommend the use of these products with temperatures higher than 60°C (140°F) as plastic expands due to temperature increases. Hansen cannot guarantee the products will perform when used with temperatures over 60°C (140°F). Hansen products that have failed in temperatures higher than 60°C (140°F) will not be covered by warranty.

For more information or technical advice email us

The information given on this sheet is for guidance only. HANSEN PRODUCTS (NZ) LIMITED accepts no responsibility for the misuse or misapplication of this information

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