AK Series Precision Filter
Advantage
Features:
- The filter housing is made of aluminum alloy by die-casting and has a compact structure to ensure safe use.
- All housings are cleaned, degreased, and specially anti-corrosion treated before spraying to improve durability and applied to offshore platform operations.
- The precise threaded interface makes installation and maintenance more accessible and more convenient.
- All housings tested under working pressure 32bar for 96 hours, and the maximum burst pressure is 105bar.
- Under the working condition of 1.5-80 ºC and pressure 16 bar, the body is guaranteed 15 years, and the service life of the Filter Element is 6000-8000 hours.
DETAILS
DP Gauge
The most popular application for differential pressure gauges is filtration monitoring. As a filter cartridge becomes obstructed with contaminants, the pressure between the inlet and outlet ports increases, and efficiency drops.
When the differential pressure reaches a specific limit, the operator knows it is time to change the filter, keeping the process running smoothly and efficiently and preventing damage to the system. Similarly, the operator can use the DP gauge to detect scale buildup in pipes and pumps.
High Quality Body
All shells are cleaned, degreased and specially anti-corrosion treated before spraying to improve durability and can be applied to offshore platform operations. The precise threaded interface makes installation and maintenance easier and more convenient.
Sight Glass
Sight glass is made of unique materials, checks the blockage condition of the drainer
Manual Bleed Valve
The pressure can be relieved when the Precision filter is replaced or overhauled by rotating the manual Bleed Valve. You can also drain when the Auto drain valve is blocked with the manual bleed valve.
TECHNICAL SPECIFICATION
| Model | Pipe size | Flow rates | Dimension (mm) | |||||||
| L/S | m³/min | scfm | W(Width) | D (Depth) | H (Height) | A | B | C(clearance for housing) | ||
| AK017 | RC1/2″ | 16.7 | 1 | 35.3 | 89 | 79 | 246 | 40 | 186 | 118 |
| AK025 | RC3/4″ | 25 | 1.5 | 53 | 89 | 79 | 246 | 40 | 186 | 118 |
| AK030 | RC1/2″ | 30 | 1.8 | 63.6 | 89 | 79 | 280 | 40 | 220 | 158 |
| AK035 | RC3/4″ | 33.3 | 2 | 70.6 | 89 | 79 | 280 | 40 | 220 | 158 |
| AK058 | RC3/4″ | 46.7 | 2.8 | 98.9 | 120 | 110 | 377 | 55 | 276 | 195 |
| AK068 | RC1″ | 60 | 3.6 | 127.1 | 120 | 110 | 377 | 55 | 276 | 195 |
| AK080 | RC1″ | 80 | 4.8 | 169.5 | 120 | 110 | 477 | 55 | 377 | 290 |
| AK145 | RC1-1/2″ | 120 | 7.2 | 254.2 | 120 | 110 | 477 | 55 | 377 | 290 |
| AK220 | RC2″ | 200 | 12 | 423.7 | 162 | 151 | 676 | 64 | 566 | 480 |
| AK260 | RC2-1/2″ | 233.3 | 14 | 494.4 | 162 | 151 | 676 | 64 | 566 | 480 |
| AK330 | RC2″ | 267.2 | 16 | 564.8 | 162 | 151 | 984 | 64 | 875 | 780 |
| AK360 | RC2-1/2″ | 317.3 | 19 | 670.7 | 162 | 151 | 984 | 64 | 875 | 780 |
| AK405 | RC2-1/2″ | 367.4 | 22 | 776.6 | 200 | 189 | 757 | 78 | 634 | 560 |
| AK430 | RC3″ | 467.6 | 28 | 988.4 | 200 | 189 | 757 | 78 | 634 | 560 |
| AK620 | RC3″ | 620 | 37.2 | 1313.6 | 200 | 189 | 1012 | 78 | 889 | 780 |
| Technical requirements | Maximum operating pressure: 10 barg Maximum operating temperature: 80°C Minimum operating temperature:1.5°C | |||||||||
| Pressure | Barg | 1 | 2 | 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Psig | 15 | 29 | 44 | 73 | 87 | 100 | 116 | 131 | 145 | 160 | 174 | 189 | 203 | 219 | 232 | |
| Correction factor | 0.38 | 0.53 | 0.65 | 0.85 | 0.93 | 1 | 1.07 | 1.13 | 1.19 | 1.23 | 1.31 | 1.36 | 1.41 | 1.46 | 1.51 | |
Air Element Filtration:
Products are tested with the international advanced testing equipment based on standard ISO12500, which is equivalent to the standard ISO8573.
| Filtration Grade |  | | | |  | | |
| PF | AO | AA | AX | ACS | AR | AAR | |
| Particle removal (ISO12500-3) | 5μm | 1μm | 0.01μm | 0.01μm | – | 1μm | 0.01μm |
| Outlet oil aerosol concentration (ISO12500-1) | 5mg/m³ | 0.6mg/m³ | <0.01mg/m³ | <0.001mg/m³ | <0.004mg/m³ | – | – |
| Filtration performance of Particle (ISO12500-3) | – | 99.999+% | 99.999+% | 99.999+% | 99.999+% | 99.999+% | 99.999+% |
| Filtration performance of (ISO12500-1) | 50% | 80+% | 99.9+% | 99.99+% | – | – | – |
| Element spanlife | 6000 hours | 6000 hours | 6000 hours | 6000 hours | 2000-3000 hours | 4000-6000 hours | 4000-6000 hours |
| Precede with | Before Air Dryer | after air dryer | after AO | after AA | before AX | after desiccant dryer | after AR |
How to select the right AK series precision filter
The AK series is the die-cast aluminium precision filter range, supplied with a differential pressure gauge, a sight glass and a manual bleed valve as standard. Selection is two steps: grade, then size.
- Grades — PF 5 µm / 5 mg/m³; AO 1 µm / 0.6 mg/m³; AA 0.01 µm / <0.01 mg/m³; AX 0.01 µm / <0.001 mg/m³; ACS and AR/AAR for carbon and special duties.
- Sizes — AK017 (RC1/2″, 1 m³/min) up to the large flanged bodies, with the dimensions and the element clearance listed in the table above.
- Pressure — rated to 16 bar. Flow figures are quoted at 7 bar; use the correction factor table when your working pressure is different, because a filter sized at 7 bar is undersized at 4 bar.
- Elements — about 6000 hours for the coalescing grades under normal conditions.
Installation and maintenance
- The manual bleed valve lets you depressurise the housing before changing the element, and it also drains the bowl if the auto drain blocks — use it, do not rely on the auto drain alone.
- Watch the sight glass: water standing in the bowl means the drain is blocked or the interval is too long.
- Mount vertically with the bowl downwards and leave the clearance marked “C” in the table for element removal.
- Fit the differential gauge connection before commissioning; without it the only way to know the element is spent is when the air quality drops.
Ak series precision filter FAQ
What does the correction factor table mean?
Published flows are measured at 7 bar. At lower pressure the same element passes less air, so multiply the required flow by the correction factor to pick the size — at 4 bar the factor is about 1.7.
Which grade removes oil vapour?
Only the carbon grades (ACS / AR). Coalescing grades remove aerosol, not vapour. If the process is sensitive to odour or to oil vapour, the carbon stage goes last in the chain.
The differential gauge shows 1 bar after two months. Too early?
It means the element is loaded, usually because the compressor is passing oil or the upstream dryer is not working. Fix the cause, then change the element — otherwise the new one loads just as fast.