25
In
stal
lat
ion
Check valve mounting
Install an optional check valve to the EHN-YN
for the prevention of a back flow, siphon and overfeeding.
In the following cases be sure to install the check valve.
• A suction side liquid level is higher than a discharge side or an injection point at atmospheric pressure.
• A discharge side liquid level is higher than a suction side but the distance is 5m or below.
• A suction side pressure is higher than a discharge side pressure.
• A discharge pressure (including pipe resistance and discharge head) is below 0.13MPa (0.049MPa for B31
and C36).
Suction side
Discharge side
Suction side
Discharge side
5m or below
Plumbing
Содержание EHN-B11-NAE
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