UR619/699
UR619/699 Series
R E T U R N L I N E F I LT E R S
s e r v i c e
i n s t r u c t i o n s
3
Note: Painting of the filter housing is optional. The coating on the
filter housing is a suitable painting base. Cover the differential
pressure warning device and nameplate if painting of the housing
takes place.
4.8
Bleed filter by opening the vent plug (10) on the cover (5) of
the filter one and one half turns. Jog system and fill filter until
all air bleeds through the plug (filter can be optionally filled
using the fill port (12)), then tighten plug. Pressurize system
fully and check for leaks; if leaks occur refer to section 5.
5
Routine maintenance
5.1
Pall filters do not normally require special attention except for
periodic monitoring of the differential pressure warning device.
Schedule replacement of filter element every six months or
sooner, and have ample supply of spare elements available.
5.2
If external leakage is noted, replace O-ring at leak. If leakage
persists, check sealing surfaces for scratches or cracks;
replace any defective parts. Body assembly is permanently
assembled at the factory: do not attempt to disassemble the
head (1), body tube (2), or center post (3).
5.3
Differential pressure devices actuate when the filter element (8)
needs changing or because of high fluid viscosity in 'cold
start' conditions. If 'cold start' conditions exist, see Section
6.2 and 6.3.
5.4
A dirty system can quickly plug a new filter element, especially
with Pall high efficiency filter media. It may require one or two
initial element changes to stabilize element life. If element life
is short or differential pressure is excessive, filter may be
undersized; refer to the sizing and selection section of the
product literature or contact your local Pall representative.
5.5
Make sure element change labels are clean and undamaged.
Replace illegible labels with the appropriate new labels.
ENGLISH
6
Differential pressure devices
Reference should be made to product literature for dimensions,
operating parameters, part numbering, ordering information and
specifications.
6.1
Differential pressure devices actuate when the element needs
changing or because of high fluid viscosity in 'cold start'
conditions.
6.2
If visual indicator is fitted and actuates during 'cold start' (red
button extends 5mm, 3/16"), reset by depressing the button
when the normal operating temperature is reached. If indicator
actuates after resetting, replace element.
NOTE: Option 'P' visual indicator has thermal lockout and manual
reset. No signal below 0°C (32°F), signal above 29°C (80°F).
6.3
If the electrical switch actuates (e.g. red light comes on) during
cold start, continue operating until the signal (red light) goes
out as system warms to normal operating temperature. This
feature can be used as 'warm up' indication in operating
procedures. If the warning signal (red light) remains or appears
when system is warm, replace the filter element.
6.4
Use of both positive indication (green light) and negative
indication (red light for dirty element) is recommended to
effectively monitor filter element life.
Electrical connections and ratings for all differential
pressure switch options:
110 VAC
=
4A (inductive),
4A (resistive)
220 VAC
=
4A (inductive),
4A (resistive)
28 VDC
=
3A (inductive),
5A (resistive)
48 VDC
=
1A (inductive),
1.5A (resistive)
125 VDC
=
0.25A (inductive),
0.5A (resistive)
Maximum inrush - 24 amps.
Underwriter’s lab. Inc. listed ratings of pressure switch (Microswitch)
options are:
4 amps at 250 VAC
0.25 amp resistive at 220 VDC
0.50 amp resistive at 110 VDC
Electrical differential pressure switch operation:
When preset differential pressure is exceeded continuity switches
from 'C' - 'A' to 'C' - 'B'.
When differential pressure decreases below the pre-set value,
continuity returns to 'C' - 'A'.
Figure 1
- Switch Circuit Diagram
C
or black
or tag 2
WARNING:
USE FITTINGS OR ADAPTORS COMPATIBLE WITH
PORTS SUPPLIED AS SHOWN BY PART NUMBER ON
NAMEPLATE AND NOTED IN DATA SHEETS: USE OF
INCORRECT FITTINGS OR ADAPTORS CAN CAUSE
FILTER HOUSING OR MANIFOLD FAILURE
RESULTING IN LOSS OF PRESSURE AND POSSIBLE
SYSTEM FAILURE OR PERSONAL INJURY.
CAUTION:
Failure to bleed the filter housing adequately will
increase the dissolved air content of the system fluid
which will shorten fluid life and may cause other
problems in the system.
A
or white
or tag 1
B
or red
or tag 3
LOW DIFFERENTIAL PRESSURE
HIGH DIFFERENTIAL PRESSURE
CAUTION:
Continued operation of 619/699 series bypass filters
(valve options A and B), with differential pressure
device actuated, can allow unfiltered flow downstream.
Continued operation of 619/699 series non-bypass
filters (valve options W, Y, N or 1) May cause collapse
or premature fatigue failure of the plugged filter
element, which could allow contaminant and unfiltered
flow downstream. Refer to element change instructions
in section 7.
