Float valve - Top of water tank

Extension in stainless steel 304L

Float valve - Top of water tank

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PIPELINE PROTECTION
PIPELINE PROTECTION
Main features

Presentation

Extension in stainless steel 304L

The float valve aims at keeping on a determined level the stretch of water in a water tank. It is set up on the supply pipe at the top.

It opens when the water tank goes down below the chosen level and closes progressively whenever the maximal level is reached.

Its essential properties are:

  • its lightness,
  • its dismantling easiness thanks to its simple construction,
  • its maintenance easiness thanks to its low components number,
  • functioning without vibrations nor water hammers.

There are float valves from DN60 to DN300 for a service pressure of 10 bars.

The float valve can be set up at the top of a water tank (with an extension in stainless steel).

Material and coating

ItemDesignationMaterialCoating

1

Body and cap DN60/65

Steel type AE 250

Epoxy powder mini thickness 200 microns

Body and capDN80 à 300

Ductile iron GS

2

Piston and jacket

PVC

3

Spindle

Steel type Z6 CN 18.09

4

Check valve

Steel type Xc 38

Epoxy powder mini thickness 200 microns

5

Check valve joint

SBR alimentary

6

Lever

Steel type Xc 38

Epoxy powder mini thickness 200 microns

7

Immersed body

Stainless steel type 304

8

Piston joint

Nitrile

Hydraulic characteristics

Headloss expression by Kα

The headloss ΔH of a valve, the flowing speed of a fluid and the headloss coefficient K in the valve are tied by the following formula:

∆H = Kα × V² 2g

with ΔH = headloss in mCE, V = fluid speed in m/s, g = gravitational acceleration in m/s², Kα = headloss coefficient without dimension

Span

25%

50%

75%

100%

98

32

16

12

Marking

There’s a unique marking on the valve’s body (description).

This description mentions:

  • nominal diameter for entrance,
  • service pressure,
  • drilling template for flanges,
  • serial number,
  • manufacturing date.