Float valve - Bottom of water tank

Float valve - Bottom of water tank

RANGE / MARK ®
EQUIPMENTS FOR RESERVOIRS
PRODUCT FAMILY
PIPELINE PROTECTION
PIPELINE PROTECTION
Main features

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.

Material and coating

ItemDesignationMaterialCoating

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

Installation plan

DNDE
mmmmmm
60350140
80400160
100450160
125600175
150650180
200750215
250850250
300950290

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

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.