Algas SDI FILTAIRE OIL DEMISTER Manual

Operation & Maintenance
Manual
...Innovative liquid vaporizing and gas mixing solutions
151 South Michigan Street, Seattle, Washington, USA 98108
Tel: [phone] Fax: [phone] Web: www.algas-sdi.com
FILE: MANUAL PN 52634 REV 01-28-16 FILTAIRE.DOC
06/16/2016

Algas-SDI Operations and Maintenance Manual – P/N – 52634 1- 1
Introduction 1
DESCRIPTION The FILTAIRE is a filtering device designed to trap heavy hydrocarbons
commonly present in LPG gas vapor. It also traps other materials, which may be
in the gas due to storage conditions and internal condition of the equipment.
Impurities are collected in the system and periodically removed through the
system blow down drain. Residual heavy end hydrocarbons with boiling points
higher than pure LPG are trapped by the filter and fall to the bottom for removal.
A complete FILTAIRE system consists of inlet and outlet connections, a blow-
down drain (5), a pressure gauge (4), a vent which is normally plugged (6), and a
bypass valve system for cleaning (1, 2, and 3). The bypass valves enable the
system to continue operating when the FILTAIRE is removed for cleaning (see
Figure1).
Note: Items 4, 5 and 6 are included with FILTAIRE assemblies.
Figure 1- Description of Operation
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Algas-SDI Operations and Maintenance Manual – P/N – 52634 2- 3
Installation 2
WARNING
The equipment described in this manual is designed to operate with
LP-gas, a flammable fuel under pressure. The nature of the
application involves inherent hazards that could result in injury.
ONLY a trained and fully qualified person should service this
equipment.
INSTALLATION PROCEDURE
1. Gas must pass through the FILTAIRE for it to work properly. Mount it
downstream of the vaporizer and the first stage regulator. Mount it level for
the filter to work efficiently.
2. Insulation may be required depending on gas pressure, outside temperature
and system requirements.
3. The FILTAIRE must have a bypass around the filter with shut-off valves for
removal and cleaning. See the accompanying diagram.
4. The filtered impurities must be drained to proper containers. Make
provisions for draining and disposing of the material safely.
5. A customer supplied relief valve must be installed to protect Filtaire and
downstream equipment from potential overpressure damage.
Figure 2 – Installation
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Installation
2- 4 Algas-SDI Operations and Maintenance Manual – P/N – 52634
Figure 3 - General Equipment
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Algas-SDI Operations and Maintenance Manual – P/N – 52634 3- 5
Operation 3
WARNING
The equipment described in this manual is designed to operate with
LP-gas, a flammable fuel under pressure. The nature of the
application involves inherent hazards that could result in injury.
ONLY a trained and fully qualified person should service this
equipment.
WARNING
Apply a liberal amount of soap/water solution to all external
threaded and flanged connections. Check for leaks by observing
new bubble formation in the soap/water solution. Repair any leaks
and retest before opening downstream valves to consuming
equipment.
PERIODIC DRAINING During normal operation the FILTAIRE should be drained periodically to remove
the material deposited in the bottom. The schedule for draining depends on the
quality of LPG gas and the usage of the entire system. Those using the system
must establish the draining schedule. A general rule of thumb used to help
establish the draining schedule is to measure the amount of heavy end
hydrocarbons drained after the initial one week of normal operation. Based on
the amount drained after one week, the schedule should be adjusted so that the
total amount of collected heavy end hydrocarbons does not exceed the maximum
amount outlined in Table 1 below.
EXAMPLE:
After the first week of normal operation, an F12 FILTAIRE was isolated and
drained. The total amount of drained heavy end hydrocarbons was measured to
be 1L (0.26 US Gallons). Based on the measured amount, periodic draining
should be performed at least once in 6 weeks to ensure that the amount of
collected heavy end hydrocarbons does not exceed the maximum amount of 6L
(1.6 US Gallons) from Table 1.
Table 1 – Maximum Amount of Accumulated Heavy End Hydrocarbons.
F4
F6
F10
F12
F14
F16
F20
F24
F30
(US gallons) 0.15 0.34 1.1 1.6 2.2 3.3 7.2 10 14
(Liters) 0.6 1.3 4.1 6.0 8.2 13 27 37 54

Operation
3- 6 Algas-SDI Operations and Maintenance Manual – P/N – 52634
NOTE
If the filter is too dirty the outlet pressure will decrease.
CLEANING THE FILTER A dirty filter causes a larger than normal pressure drop, decreasing the outlet
pressure. A decreasing outlet pressure indicates the FILTAIRE has accumulated
significant amount of residue and must be cleaned to keep on operating properly.
In general, a FILTAIRE must be cleaned every 6 months. The frequency of
cleaning will greatly depend on the quality of LPG used as well as the application
it is used for.
CLEANING SCHEDULE:
Drainage and cleaning of the FILTAIRE is determined by use. Once it is noted
how often cleaning is necessary, a maintenance schedule can be established.
A maintenance form (Table 2) is provided to help you establish a schedule.

Algas-SDI Operations and Maintenance Manual – P/N – 52634 4- 7
Maintenance 4
Cleaning the Filter (refer to Figure 1)
When the unit is dirty it must be cleaned. For proper cleaning, the stainless steel
filter must be soaked and reverse flushed.
RECOMMENDED PROCEDURE
1. Open the bypass valve, close the Filtaire inlet and outlet valves.
2. When bleeding the FILTAIRE, connect a hose or drainpipe from the drain
valve to a safe container with a vent. Make a good connection and bleed the
material to the container
CAUTION
PRESSURE MUST BE ZERO FOR THE FILTAIRE TO BE REMOVED.
CONTENTS UNDER PRESSURE ARE DANGEROUS.
3. Close the drain valve.
4. Remove Filtaire from the system and place in a cleaning area.
5. Cap the inlet.
6. Fill the unit with kerosene or a similar light solvent and allow it to soak for 24
hours.
7. Reverse-flush the unit (flush from outlet flange) with kerosene until the
Kerosene is clear and no residue is left.
8. After flushing, allow the kerosene or solvent to drain completely and let the
unit dry. Air can be pumped through the unit to dry it thoroughly. Kerosene
or solvent must not enter the propane system.
9. Remove the inlet cap.
10. Re-install the unit. Connect the inlet and outlet. Close the blow-down drain.
11. Open the Filtaire inlet and outlet valves and close the bypass valve.
12. The FILTAIRE is operational.
NOTE: Maintenance form is provided to note maintenance dates and
operation pressures.
CAUTION
THE CONTENTS OF THE FILTAIRE ARE FLAMMABLE NEVER
CLEAN THE UNIT WHEN THERE IS A SOURCE OF IGNITION IS
PRESENT - ELECTRICAL SPARK OR FLAME.

Maintenance
4-8 Algas-SDI Operations and Maintenance Manual – P/N – 52634
Table 2 – Maintenance Form
DATE
DATE
DRAINED
AMOUNT
DRAINED
PRESSURE
DATE
CLEANED
SPARE PARTS
ASDI PN: 30897 Float Switch
ASDI PN: 30641 Pressure Gauge 0-300 psig

Algas-SDI Operations and Maintenance Manual – P/N – 52634 5- 9
Options 5
AUTOMATIC MAINTENANCE OR HIGH LIQUID WARNING
Optional liquid level switches can be installed in the Filtaire to warn maintenance
that the Filtaire requires draining due to the accumulation of liquid in the
reservoir. Provisions for single or dual liquid level switches can be made during
manufacturing. One switch allows a warning when the reservoir needs draining.
A second switch can be used to shut down the system if liquid continues to
increase in the reservoir. This same system can be used to provide an additional
safety that will prevent liquid propane from getting into consuming equipment if a
failure allows liquid to pass through the vaporizer.
Figure 4 shows the physical location of the liquid level switches. Contact the
factory for any special design requirements or applications.
Figure 5 has electrical drawings of suggested connections of the liquid level
switched to provide an alarm and a control output. Maximum current through the
liquid level switch is ¼ amp so an interposing relay is required for larger loads.

Options
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Figure 4 - Options (A)
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