Model No.︰A55XA,A3051XA
Brand Name︰WALKER
Country of Origin︰United Kingdom
Unit Price︰US $ 295 / pc
Minimum Order︰1 pc
A comprehensive range of threaded filters with 19 models offering connections from ¼” to 3”
and capacities up to 1500 SCFM (2550 Nm³/h).Custom engineered media for optimised performance & efficiency
Oleophobic borosilicate media and a custom engineered anti re-entrainment layer guarantees exceptional dirt holding and drainage. Unique material construction minimises pressure drop and improves energy efficiency.
Self centralising, drop-fit,anti-vibration, colour coded elements Independently tested and
validated to ISO 12500 A unique endcap design which engages with the bowl,prevents vibration, improves stability and assists drainage.Colour coded elements make grade identification swift and simple.
Compressed Air Threaded Filters
Nm3/h SCFM A B C D Kg Element model
A018 (grade) ¼ 13.6 8 50 18 152 60 0.3 E0304 (grade)
A019 (grade) ¼ 25.5 15 50 18 152 60 0.3 E0305 (grade)
A028 (grade) ¼ 42.5 25 70 65 231 70 0.6 E0406 (grade)
A038 (grade) 1/2 59.5 35 70 65 231 70 0.6 E0407 (grade)
A058 (grade) ½ 85 50 70 65 272 70 0.7 E0413 (grade)
A059 (grade) ½ 119 70 100 105 346 80 1.6 E0613 (grade)
A078 (grade) ¾ 144 85 100 105 346 80 1.6 E0613 (grade)
A079 (grade) ¾ 212 125 100 105 466 80 2.0 E0620 (grade)
A108 (grade) 1 229 135 100 105 466 80 2.0 E0620 (grade)
A109 (grade) 1 297 175 100 105 466 80 2.0 E0625 (grade)
A128 (grade) 1¼ 476 280 122 112 530 80 2.8 E0730 (grade)
A158 (grade) 1½ 545 320 122 112 530 80 2.8 E0730 (grade)
A159 (grade) 1½ 680 400 146 122 552 100 4.2 E0830 (grade)
A208 (grade) 2 765 450 146 122 552 100 4.2 E0830 (grade)
A209 (grade) 2 1190 700 146 122 855 100 6.3 E0860 (grade)
A254 (grade) 2½ 1445 850 210 137 665 100 8.5 E1140 (grade)
A340 (grade) 3 1530 900 210 137 665 100 8.5 E1140 (grade)
A360 (grade) 3 2125 1250 210 137 885 100 10.5 E1160 (grade)
A390 (grade) 3 2550 1 500 210 137 1045 100 12.0 E1175 (grade)
* Rated flow at 7 barg, reference conditions 1 bar (a) 20°C
X25 X5 X1 XA AC
Particle removal 25 micron 5 micron 1 micron 0.01 micron 0.01 micron
Maximum particle size class** - 3 2 1 1
Maximum oil content - 4 2 1 1
Maximum oil carryover at 20°C (68°F) 10 mg/m³ 5 mg/m³ 0.1 mg/m³ 0.01 mg/m³ 0.003 mg/m³
Pressure loss: clean and dry 30 mbar 0.4 psi 40 mbar 0.6 psi 75 mbar 1.1 psi 100 mbar 1.5 psi 75 mbar 1.1 psi
Pressure loss: saturated 50 mbar 0.7 psi 75 mbar 1.1 psi 150 mbar 2.2 psi 300 mbar 4.4 psi -
Pressure loss: element change 400 mbar 6 psi 400 mbar 6 psi 400 mbar 6 psi 400 mbar 6 psi 6 months 1000 hours
Maximum temperature 120°C 248°F 120°C 248°F 120°C 248°F 120°C 248°F 25°C 77°F
Maximum working pressure 16 barg 232 psig 16 barg 232 psig 16 barg 232 psig 16 barg 232 psig 16 barg 232 psig
Element end cap colour black green red blue black
** to ISO 8573-1:2001 (E)
pressure correction factors for maximum flow rate, multiply model flow rate by
the correction factor corresponding to the minimum operating pressure
Operating pressure barg (psig) 4 (58) 5 (72) 6 (87) 7 (100) 8 (115) 10 (145) 12 (174) 14 (203) 16 (232)
7 barg - correction factor 0.76 0.84 0.92 1.00 1.07 1.19 1.31 1.41 1.51
technical notes
1 Direction of air flow is inside to out through the filter element.
2 Pop up indicators (65DPUG) are fitted to models A028 to A058 as standard. Differential pressure indicators (65DPIG) are
fitted to models A059 to A390 as standard. AC grade filters do not include DP equipment.
3 Threaded filters are fitted with float operated automatic drain valves. ADV6000C on models A018 to A058 and ADV6000
on models A059 to A390. Models A059 to A390 can be adapted to use ¼" drains with a reducer.
4 Activated carbon filters must not operate in oil saturated conditions and will not remove certain types of gases including
carbon monoxide (CO) and carbon dioxide (CO2).
5 Threaded filters are manufactured from cast aluminium alloy and are PED 97/23/EC compliant for group 2 gases.
6 Threaded connections are Rp (BSP parallel) to ISO 7/1 or NPT to ANSI B2.1 if supplied within North America.
7 For NPT connections, add the suffix N e.g. A018WSN.
8 Filter elements should be changed every 12 months / 8000 hours (whichever comes first). Activated carbon filter elements
should be changed every 6 months / 1000 hours (whichever comes first).
9 Filters are suitable for use with mineral and synthetic oils plus oil-free compressed air applications.
10 Silicone free options are available, please contact Sales for details.