Vacuum Pump
Protection Filters
Models | A3031 to A3303
Flow Rates 4 SCFM (7 Nm3/hr) to 288 SCFM (489 Nm3/hr)

Essential for the removal of liquid and particulatecontamination, Walker Filtration's New Alpha Vacuum
Pump Protection Filters offer a high efficiency solution
for both rough and high vacuum applications.
Offered in a range of 15 models with threaded connections from 3/8" to3", the New Alpha high efficiency filters prevent process contaminationfrom entering liquid or dry running vacuum pumps - helping to prevent
damage to rotating parts and costly downtime.
The New Alpha elements utilise custom engineered media technology
to deliver market leading performance, significantly reducing pressure
loss and energy consumption for low operational costs and increased
performance. The VLR grade is used for liquid aerosol and high dirt
removal, whilst the VX1 grade is used for fine particulate removal.

Assured Protection

Optimised Filtration Performance

Product Safety in Mind

Highly efficient removal of solid
particles and other contaminants
ensure prevention of damage tothe Vacuum Pump

New Alpha custom engineered
media technology delivers a stepchange in performanceLock indication arrows assure
effective sealingMarket Leading Performance Custom engineered filtration media delivers optimum performance

Simplified Serviceability Profiled bowl design and unique push fit filter elements ensure quick andreliable maintenanceExceptional Drainage Manual drain fitted to all Vacuum Pump Protection Filters as standardProduct Safety in Mind Guaranteed safe housing closure with rotational safety stop

Corrosion Protection Internal and external electrophoretic paint finish followed by a tough exterior polyester
powder coating

For further information please visit www.walkerfiltration.com

For further information please call: +44 (0) 191 417 7816

Technical Specification
Filter modelA3031 (grade)

3/8

7Dimensions mm

4Weight Kg

Element model

70

0.6

E30408 (grade)AB

C

D7024231

A3051 (grade)½11770

24231

70

0.6

E30412 (grade)

A3052 (grade)

½

20

12127

32285

80

1.7

E30612 (grade)

A3071 (grade)

¾

25

15127

32285

80

1.7

E30612 (grade)

A3101 (grade)

129

17127

32285

80

1.7E30612 (grade)

A3072 (grade)¾3521127

3237180

2E30621 (grade)

A3102 (grade)

15029127

32371

80

2E30621 (grade)

A3122 (grade)

1¼�75

44

170

53

508

100

4.9E30831 (grade)

A3151 (grade)

1½10059

170

53

508

100

4.9E30831 (grade)

A3201 (grade)

2115

68

170

53

508

100

4.9

E30831 (grade)

A3202 (grade)

2180

106

170

53

708

100

5.5

E30850 (grade)

A3251 (grade)

2½200

118

220

70736

100

10.5

E31140 (grade)

A3301 (grade)

3234

138

220

70736

100

10.5E31140 (grade)

A3302 (grade)

3360

212

220

70857

100

11.5E31160 (grade)

A3303 (grade)

3489

288

220

701005100

12.5

E31175 (grade)

Rated flow at atmospheric pressure,1 bar (a) and 20°C

GradeParticle removal
Maximum temperature

120°C

Pressure loss - clean & dry
Pressure loss - element change
Maximum working pressure

65DPUGA3-100

20 mbar

0.3 psi

40 mbar

0.6 psi

12 mths

8000 hrs

12 mths

8000 hrs

20.7 barg

300 psig

20.7 barg

300 psig

Operating
71mm
vacuum65DPG250G

B

AA

B
B

CCC

B
ABAB

D

DA3052A- A3303
AB

A

A

700

600

500

400

300

200

Torr

760675600525450375300

225150

InchHg

29.9

26.6

23.6

20.7

17.7

14.8

11.8

8.9

5.9

Psia

14.7

13.0

11.6

10.2

8.7

7.3

5.8

3.3

2.9

1.00

0.93

0.86

0.79

0.71

0.64

0.57

0.5

0.43

A

3.
4.

Drain flasks are available for liquid collection for use at atmospheric pressure or vacuum only.

5.

New Alpha Filters are manufactured from cast aluminium alloy and are PED 2014/68/EU compliant for group 2 gases.

6.

Threaded connections are Rp (BSP Parallel) to ISO 7-1 or NPT to ANSI/ASME B1.20.1 if supplied within North America. Rc (BSP Taper)
44mm
to ISO 7-1 also available.
approx.
For NPT threads, add the suffix
N, e.g., A3052NVLR, and for Rc threads add the suffix C, e.g. A3052CVLR.
44mm

7.

44mm
D
Filter elements should be changed
every 12 months / 8000 hours (whichever comes first).
8.
approx.
approx.
AA

For more information please contact our distributor:

BBCRed

800

®

B

Green

Direction of air flow is inside to out through VLR grade and outside to in through VX1 grade.
Pop up indicators (65DPUGA3-100) are fitted to models A3031 to A3051. Differential pressure gauges (65DPG250G) are fitted tomodels A3052 to A3303 as standard. Volt free contact options are available upon request - see price guide.
C
Manual drain valves (MDV25 on models A3031 to A3051 and MDVE25 on models A3052 to A3303) are fitted as standard.

C

44mm
approx. 44mm
42mm
approx.
approx. D

Full vacuum

900

Technicalnotes
BA
1.
2.

C

A

WFL1007 Rev-C-UK 1217

ACA3031 - A3051
AA

Full vacuum

Atmospheric

Correction factor

44mm
28mmapprox.
Dapprox.
DD42mmDapprox.

BA

65mm
Mbar abs

71mm71mm

71mm42mm

248°F

For maximum flow rate, multiply model flow rate by the correction factor corresponding to the minimum
operating pressure

Vacuum Correction Factors
65mm65mm

VX1
1 micron
120°C

Element end cap colour

65mm
65mm
60mm
71mm

VLR
5 micron
248°F

Maximum working vacuumAC

Exhaust flow rate(vacuum displacement)
Nm³/hrSCFM

Pipe size inches

BB
®

BC

®

Easy Filtration
Tel: +39.02.84240894 | Mob: +39.345.3673328 | Fax: +39.02.84240893 | Email: info@easyfiltration.it