TWIN FILTERS - TWINOMATIC

AUTOMATIC SELF CLEANING FILTER UNITS

Twin Filter has it’s own range of Automatic Self Cleaning Filter units. Heavy duty filters, especially designed for high flow rates and continuous operation in many oilfield and industrial applications. Capable of flows up to 4400 m3/h, with screens covering a filtration Range from 10 up to 3500 micron. The specific design of the Automatic Self Cleaning Filters guarantees a continuous flow rate, even during cleaning. The self cleaning process is automatically triggered by:

• a signal from the pressure Differential Switch (PDS)
• a signal from the timer

Manual override is always possible.

BENEFITS

• Uninterrupted flow and continuous filtration during cleaning
• Effective Cleaning of the total filteration area, even at minimum pressure
• Minimum flush, less than 1% of the total flow is used for cleaning
• Simple, reliable and robust, low maintenance and easy to operate
• High flow rates (up to 4400 m3/hr/single unit)
• Very wide filtration range: 10 micron to 3500 micron
• Special design for oilfield operations
• Fully automatic operation (no operator required)
• Compact and Robust

APPLICATIONS

• Water injection
• Pipeline flushing
• Produced water
• Cooling water
• Sea water intake
• Pre-filtration RO
• Solids removal for protection of process equipment (high pressure pumps, heat exchangers, spray nozzles)
• Waste Water Treatment

FILTERING PROCESS

For pre-filtration, the water flows through the coarse screen from outside-in. After that, the water flows through the stainless steel fine screen from inside out, creating minimum head loss. Different types of screens can be used for different filtration needs. The filtration cake accumulating on the screen surface causes the development of head loss across the screen. When this head loss reaches a pre-set value the cleaning mechanism is operated. The scanner is driven by an electric or pneumatic motor. It scans the screen (without touching it) in a spiral motion and removes the filter cake by suction power created by the exhaust valve opening to the atmosphere. The hollow nozzles of the scanner collect the filter cake, which is then discharged through the exhaust valve. Cleaning takes appr. 30 seconds.

CONTROL SYSTEM

The TwinOmatic filter is equipped with a DP-switch that transmits an electric or pneumatic signal to the solenoid of the exhaust valve when the pressure differential across the screen reaches a pre-set value. The signal activates the electronic or pneumatic controller which initiates the flushing cycle. The solenoid operates the exhaust valve by means of a hydraulic command or compressed air.

SKID MOUNTED SYSTEM

Twin Filter manufactures complete automatic self-cleaning filter packages with all necessary piping, valves and controls for continuous operation. In addition to the standard range, we design and manufacture to client specification. We can offer you multiple units in series and parallel or complete packages. TWINOMATIC units can be combined with cartridge filters to achieve low filtration degrees > 0.5 micron. The skids are very compact and offer a wide flow up to 11000 m³/h and a filtration range from 0.5 - 3500 micron.

STANDARD FEATURES

• Flow rate - up to 11000 m³/h
• Connections - flanged, hammer unions
• Material - Carbon steel, epoxy coated
• Pressure - up to 10 bar
• Temperature - up to 95 ºC (203 ºF)

STANDARD SCREENS

Micron 10 25 50 80 100 200 300 500

We supply screens in a weave and wedge wire execution

STANDARD DESIGN FEATURES

• Self cleaning features are: dP, timer, dP/timer, continious
• Flushing counter
• An Alarm or an alternative signal in malfunction mode (open a by-pass, shut-off the pump, operate an alarm signal control room, etc.)

OPTIONAL DESIGN FEATURES

• Design code vessel - ASME VIII (u-stamp), DNV PD5500, Stoomwezen, AD 2000
• Design code frame - DNV 2.7-1/ EN 12079
• High pressure range - Up to 6000 Psi (412 bar)
• High temperature range - Withstands temperatures up to 95 ºC (203 ºF)
• Anti frost - Special control system for extreme climate conditions
• Electric current - ATEX (zone I + II) 110V, 220V, 380 V, single phase, 24V and solar energy
• Construction materials - CS Rubberlined, Stainless steel 304 of 316L and titanium, (Super)Duplex
• Available controllers - PLC, electronic, pneumatic
• Available drive unit - Electric, pneumatic and hydraulic

Temporary Water Injection, Offshore Qatar, 120m3/hr, 50 micron, polish fi ltration 2 micron

Prefi ltration of main water supply to the platform, offshore Middle East, 300 m³/h at 80 microns Housing 6MO