MICRODYN CAPILLARY MODULES | USER MANUAL
MANN+HUMMEL Water & Fluid Solutions | REVISION DATE: 09/09/2021
15
5.4.2
PBP with Pump Pressure
In large systems, it is possible to back pulse the modules individually or in groups. In this case, it is best to use a pressure-controlled
pump. To keep the pump small and to get the necessary flow volume, it is possible to use a pressure vessel with a rubber
membrane for the storage of pressurized filtrate. The pump will pressurize this filtrate in the vessel up to the regulated pressure.
The vessel needs to be big enough to store the back pulsing volume of 1 L per installed m
2
of membrane area (or 0.26 gal per 10.8
ft
2
of membrane area).
Feed Pump
(On)
Concentrate
PI2
PI1
Feed
SEPRODYN
®
Module
PBP Bleed
PI1
TI
PI
PI
PI2
SEPRODYN
®
Module
FI
Compressed
PBP-Tank
Permeate
Timer
Back Flush
Usually, the outlet on the upper, downstream side is used for the filtrate due to the module’s automatic ventilation. However, it is
also possible to use the outlet on the other side of the module for back pulsing, especially when it is used for chemical cleaning
with automatic valving.
Feed Pump
(Off)
PRS-Bleed
Open
PI2
PI1
Feed
SEPRODYN
®
Module
PI1
TI
PI2
SEPRODYN
®
Module
FI
Permeate
Timer
PI
Timer
Closed
Open
Compressed
PBP-Tank
Closed
Open
Figure 12
. Simplified flow diagram of PBP with pump pressure.
Figure 13
. Flow diagram of PBP with the second filtrate socket.
