Sonic purge valve Neyrtec type
Reference:788
Purgeur pour la société SOLVAY (réf 1210022)
The air purge valve allows the evacuation of the air at a flow rate controlled by the cross section of the nozzle Ref. 1,thus limiting water hammer at the end of the purging operation.
Description
Specification leaflet available on demand
In fact, the laws of air-flow mean that this cannot exceed the speed of sound, ie., about 200 m/sec in the concerned, whatever the pressure may be upstream.
It should be noted that this flow rate is attained at abcut 2 bar absolute.
Due to this, any water hammer following the completion of a purge of the circuit is pratically cancelled out.
Choice of ND of air purge valve.
The choice of air purge valve must make allowance for :
- the diameter of the pipe
- the maximum service pressure (see table below).
La SNH fabrique également la gamme des purgeurs DUOSONIC sur demande.