Probably,
there is no more mythical concept in the field of water supply than a hydro
shock. It can be understood. This physical phenomenon is difficult to visually
"feel". The time of "life" of it is a fraction of a second.
And the consequences can’t be seen immediately. At the same time, they are
quite painful: the rupture of pipelines, hoses, leaking valves, mixers, etc.
At
the same time, most installers do not provide at least some kind of protection
against a water hammer. Who by ignorance, who to reduce the cost of the system.
Someone relies in this matter on the pressure reducer. But the latter is itself
a "victim" of pressure surges.
The
solution to the problem is the installation of a water hummer damper.
There
are two main types of such devices - membrane and piston.
Membrane
dampers hydraulics produce Valtec, Zilmet and others.
 |
| Membrane water hummer damper by Valtec |
The
principle of operation and execution as an expansion tank. Only a small amount.
The camera is divided into two zones. One is filled with gas, the other is in
contact with water. Disadvantages of such models:
- it
need to periodically inflate the absorber chamber;
-
penetration of gases into the coolant through the membrane;
-
susceptibility of membranes to aging and ruptures.
Piston
compensators for water hummer do not have the above disadvantages. They are
produced by such brands as RBM, Caleffi, FAR, OR, etc. Operating mechanism -
spring. When a pressure jump occurs, it contracts. Thus, compensating for the
blow. Depending on the manufacturer, the spring and piston material may vary.
When the metal piston is working, additional friction about the housing and
noise can occur. Therefore it is better to install expansion joints with a
plastic piston (RBM).
 |
| Piston water hummer damper of RBM |
Optimum
installation location of the device - directly in front of the sources of
formation of water hummer - stop valves, mixers. Near all those devices,
triggering which can lead to a sharp shutdown of the flow of liquid.
Do
not forget about the safety of the water supply system - install a water
hammer dumper!
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