Alfa Laval ALF-R User Manual

Alfa Laval Copenhagen A/S ALF – Installation, Operating and Safety Manual
ALF Instruction Manual UM_Filter_100B03 Page 22 of 67
• The working pressure on filter inlet at P1 must be min. 0.3 bar higher than the pressure in
the flushing outlet P3.
• The water flushing velocity should be between 5-10 m/s in order to carry eventual debris. If
the flushing connection pipe must be restricted in order to reduce the flushing flow, then a
conical restrictor with 15° angle shall be installed. The restrictor shall be installed at least
10x Pipe diameter from the flushing valve. Piping design & construction shall allow
minimum flushing flow from the flushing pipe line to secure the flushing function. (See Filter
Specification).
NOTE
If there is not sufficient space behind the restriction cone, the abrasive wear can
reduce the life of the pipe bend behind it.
• ALF filter piping shall be designed with a by-pass system, if continuous plant operation is
needed. (See installation example).
• During piping design, ensure that it is possible to drain the Alfa Laval Filter, either by outlet
direction or by an optional drainage connection.
• It is recommended that pressure gauges to be installed on the pipeline for the verification of
the filter’s pressure drop performance.
• It is not recommended to install the filter directly on the pump outlet. Min. recommended
distance 8 times pipe diameter from the pump to the filter inlet.
• Shut-off valves on inlet and outlet are needed in order to perform service, inspection or filter
by-pass. Shut off valves must not be installed directly on the filter.
• Make sure isolating valve in the filter inlet shall be opened with caution to avoid any
possible water hammer.
• Dry & clean air is required for pneumatic actuators and solenoid valves. (See pneumatic
actuators operating manual).
NOTE
The flushing & diverter valves must be opened and closed with caution
. It is very
important for the protection of the filter’s internal parts, especially filter basket.
(Opening and closing time on pneumatic actuators can be adjusted by throttle
valve on the actuators).
Type
Fl
o
w
Di
v
ert
e
r
Min.
Fl
o
w
Di
v
ert
e
r
Max.
Flushing Val
v
e
Min.
Flushing Val
v
e
Max.
ALF 10/15
ALF 20
ALF 30
ALF 40
ALF 50
ALF 60
ALF 80
4 s
4 s
8 s
12 s
20 s
20 s
20 s
30 s
30 s
30 s
50 s
65 s
65 s
65 s
4 s
4 s
4 s
8 s
8 s
8 s
8 s
30 s
30 s
30 s
50 s
65 s
65 s
65 s

Alfa Laval ALF-R Specifications

General

Brand	Alfa Laval
Model	ALF-R
Category	Water Filtration Systems
Language	English