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Compressed air recommendations
Piab recommends filtered, oil-free compressed air for its multi-stage ejectors.
Maximum particle size:
Maximum particle concentration:
Maximum oil content:
Compressed air supply
Piab LVH40 is designed for a compressed air supply pressure of 0.4-0.6 MPa (58-87 psi). To ensure that the supply pressure to
the pump will be correct, it is important for the compressed air lines to be correctly sized. Use at least the sizes specified in the
table below.
Hose length 1 m
Ø 5.2 mm
The dimensions are calculated for a pressure drop of 0.01 MPa (0.1 bar).
Insufficient feed pressure
Piab LVH40 will not be damaged in case of insufficient feed pressure. What happens is that the flow decreases, and the maximum
vacuum level decreases according to the table below.
Feed pressure, MPa
0.60
0.55
0.50
0.45
0.40
0.35
0.30
Resistance to chemicals
Chemicals
Acetone nitrile
Ammonia
Hydrofluoric acid
NaOH
Nitric acid
Hydrochloric acid
Sulphuric acid
*PPS = Polyphenylene sulphide
A = Recommended—little or no effect
B = Minor to moderate effect
C = Moderate to severe effect
U = Not recommended
40 µ
10 mg/m
(atmospheric air)
3
1 mg/m
(atmospheric air)
3
Hose length 2 m
Ø 6.0 mm
Max. vacuum level, mbar abs
20
20
20
50
270
420
550
Material in pump
PPS*
A
A
A
A
B
A
A
Hose length 3 m
Ø 8.2 mm
Recommended seal and flap valve material
EPDM
Viton
(FPM)
®
seal
seal
A
U
A
U
U
A
A
B
A
A
A
A
B
A
Kalrez
®
A
A
A
A
A
A
A
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