Service 67
Cat. No. 01016370
Backwash Flow Controllers - Theory of Operation and Service
Located on the drain connection of the Brunermatic valve, the purpose of the backwash flow controller is to regulate the
up flow backwash required to expand and agitate the resin in the softener. The softener will allow maximum expansion of
the resin, while preventing any loss to the drain.
No Flow, Washer Relaxed
sher
Direction
of
Flow
Low Inlet Pressure, Orifice
Slightly Contracted
High Inlet Pressure, Orifice
Highly Contracted
Figure 106.
The flow control principle is simple and trouble free. The specified rate of flow will be constant regardless of inlet pressure
variations. This is accomplished by the automatic change in orifice size of the flow washer as inlet pressure varies.
The flow washer pictured above is installed, either in a single or multiple configuration within a special nipple. The selec-
tion and the number of flow washers can achieve any desired backwash flow rate.
TYPICAL BACKWASH CONTROL ASSEMBLIES
Figure 107.
Occasionally, the Backwash Flow Controller may become plugged with scale, rust, or other foreign material. If this occurs,
cleaning is required. This can be done while the softener is in SERVICE and under pressure.
To Next Page
Loading...
Need help?
General
