Duplex cartridge filter unit is the most commonly used cartridge filter unit in the oilfield industry. This offshore proof, filter unit is equipped with all necessary valves and safety features. The Duplex offers the most cost effective way to clean-up all possible oilfield fluids. It allows you to simultaneously filter with one vessel, and easily change out the used cartridges of the other vessel.
During normal operations the strengths of the duplex filter is that it can be completely operated maintenance-free, Long lifetime Easy to use Low price, high quality Application, except for checking the seals and cleaning of the filter element. With two filter chambers connected with a changeover valve one chamber is always in operation while a clean filter chamber is in standby mode. Duplex filters are primarily used where shutting down machines and systems are not practical or highly uneconomical, for example, in the maritime or the production industry.
| Product name |
Duplex Cartridge Filter Unit |
| Model |
LF-610-DX-SS |
| Maximum Flow Rate (Single vessel) |
120m3/hour |
| Frame size |
L2750xWx2350H2025mm |
| Materials of Vessel and Piping |
SS316L (All Wetted parts) |
| Vessel diameter |
650mm |
| Vessel thickness |
4mm |
| Frame material |
Carbon Steel; Powder Coated |
| Weight (Empty) |
2000KG |
| Max. Operating Pressure |
10bar (101.5 psi) |
| Max. Operating Temperature |
120.0 °C (158.0 °F) |
| Inlet/Outlet Connection Size: |
4 inch Flange |
| Pressure Relief Valve Type |
1" Brass Set Point @ 7 bar (101.5 psi) |
| Vent |
1" SS 316 ball valve with 1" BSP-F |
| Drain |
1" SS 316 ball valve with 1" BSP-F |
| Lid Seal |
EPDM O-Ring |
| Instruments |
Inlet/Outlet Pressure Gauge (0-10bar / 0 - 150 psi) |
| Main Valves: |
4" Butterfly Valve, NBR Seat, SS Disc. |
| Filter Cartridges quantity: |
50pcs Cartridges per vessel |
| Cartridge size |
OD63.5xH1016mm |
| Cartridge material: |
Polypropylene |
| Filter cartridge micron |
20miron |
| Manufacturer |
Xinxiang Lifeierte Filter Corp.,Ltd.(China) |
Filtration phase
While one filter chamber of the duplex strainer is in filtering mode, the other chamber is always with a cleaned filter element off line. The liquid passes through the filter element and over time the pressure drop in this filter chamber will increase. The increased pressure drop is an indication that particles have been accumulated and cleaning is required. Optional a differential pressure indicator can be installed on the duplex strainer.
Cleaning cartridge phase
By activating the switch plug, the clean filter chamber will be put in operation and the dirty filter chamber is simultaneously switched off. Switching to the clean filter chamber is carried out without a pressure surge. For cleaning, the contaminated filter chamber is depressurized by the vent screw, the housing cover is removed and the filter element has to be removed. The filter element is cleaned by flushing it with a cleaning fluid and subsequently blown out using compressed air.
System Design Features:
-Standard serial/ parallel configuration
-The 50 cartridges per vessel
-Compact space saving design
-Innovative easy push lever and easy to handle swing-away vessel lid
-Swing-bolts and nuts for quick opening
-Self sealing, service friendly cover gasket
-All 4 inch valves easy to operate from the front
-Certified hoisting slings and forklift pockets
-Safety valve set at 7 bar (105 Psi)
-Robust offshore frame
Applications:
Completion fluids / Water injection
Produced water / Seawater intake
Oily water clean up / Diesel
Pre-filtration RO
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