21
In
stal
lat
ion
Plumbing
Check valve mounting
Install an optional check valve to the EJ
for the prevention of a back flow, siphon
and overfeeding. In the following cases be sure the check valve is installed.
• 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 line pressure is higher than a discharge line pressure.
•
A discharge pressure (including pipe resistance and discharge head) is below
0.13MPa.
Suction side
Discharge side
Suction side
Discharge side
5m or below
