Technical Specifications


Use the following flow chart and technical specifications to determine the correct Foot Valve for your requirements

Foot Valve selection instructions

Step 1: Measure or calculate the capacity of your pump installation.

Step 2: Look at the chart for the valve(s) that cover the flow rate.

Step 3: For dirty water applications choose the smallest valve that will be operating in the
            area shown by the thicker line.

Example: If your pumping capacity is 400 l/min use a FV32 Foot Valve

Maximum Head Pressure: @ 20°C
VALVE FV25 FV32 FV40 FV50 FV63
psi 235 235 235 235 235
Bar 16 16 16 16 16
kPa 1600 1600 1600 1600 1600
Vacuum required for initial flow:
VALVE FV25 FV32 FV40 FV50 FV63
psi -0.5 -0.5 -0.5 -0.5 -0.5
kPa -3.5 -3.5 -3.5 -3.5 -3.5
Vacuum required to fully open diaphragm:
VALVE FV25 FV32 FV40 FV50 FV63
psi -1.5 -1.5 -1.5 -1.5 -1.5
kPa -10.0 -10.0 -10.0 -10.0 -10.0
Minimum flow for self cleaning action:
VALVE FV25 FV32 FV40 FV50 FV63
l/min 110 210 300 460 600
Connection: female BSPT
VALVE FV25 FV32 FV40 FV50 FV63
Thread Size 1" 1 1/4" 1 1/2" 2" 2 1/2"
Dimensions: (mm)
VALVE FV25 FV32 FV40 FV50 FV63
Diameter 69 87 99 123 152
length 72 88 99 120 157
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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