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EQUIPMENTS FOR RESERVOIRS

Float valve - Bottom of water tank

Product family
Pipeline protection

Presentation

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 bottom.

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 bottom of a water tank in immersed position.

Technical design

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50-65 1200 140 350 Ø 400 x 200 25 167300
80 1400 160 400 Ø 400 x 200 30 167304
100 1450 160 450 Ø 400 x 200 35 167313
125 1650 175 600 Ø 400 x 200 50 167315
150 1750 180 650 Ø 400 x 200 60 171924
200 1850 215 750 Ø 550 x 250 70 167326
250 1950 250 850 Ø 550 x 250 85 171927
300 2000 290 950 Ø 550 x 250 97 162916

Features

Material and coating

Item Designation Material Coating
1 Body and cap Steel type AE 250 Epoxy powder thickness mini 200 microns
2 Piston and lining PVC  
3 Check valve – holder axis Steel type Z6 CN 18.09  
4 Check valve Steel type Xc 38 Epoxy powder thickness mini 200 microns
5 Check valve joint SRB supply  
6 Lever Steel type Xc 38 Epoxy powder thickness mini 200 microns
7 Roller Steel type Xc 38 Epoxy powder thickness mini 200 microns
8 Piston joint Nitrile  
9 Immersed body Expanded Polystyrene CL5  
10 Chain Inox type A 304  
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Installation plan

DN D E
mm mm mm
60 350 140
80 400 160
100 450 160
125 600 175
150 650 180
200 750 215
250 850 250
300 950 290

Length of the delivered chain: 5 meters to adjust when setting up.

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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:

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%
Kα 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.