Installation - Danfoss EV210B How To Use Manual

Flow direction
Water hammer
Equalising orifice
© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809
To be able to operate correctly, all solenoid valves
must be installed with the arrow cast on the body
pointing in the direction of flow.
Water hammer is a typical result of high liquid
velocity (high pressure and high flow velocity
through small pipe diameters).
There are several reasonable solutions to the
problem:
A: Reduce the pressure by installing a pressure
reduction valve ahead of the solenoid valve. If pos-
sible, increase the pipe diameter.
B: Damp the water hammer by installing a flexible
hose or flexible buffer ahead of the solenoid valve.
C: Use a solenoid valve of the type EV220B 15-50.
The equalising orifice can be replaced by a version
with smaller diameter. This gives a longer closing
time (see "Spare parts" and "Opening and closing
times").

Installation

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