Page 5 - Proportion-Air - QB3 Electro-Pneumatic Regulator

PERFORMANCE CHARACTERISTICS

LINEARITY RESPONSE TO STEP INPUT
LINEARITY
100
100
90 Command
90 80 Pressure
Pressure [% of scale] 70 % of Scale 60
80
70
60
50
50
40
40
30
20
20
10 30
10
0
0
0 1 2 3 4 5 6 7 8 9 10 -100 0 0.5 1 1.5 2 2.5 3 3 3.5 4
Command [Volts]
Volume = 50 cu. in.
Time [seconds]
This chart shows the linear characteristics of QB3 Times for QB3 to fill/exhaust a closed chamber. Step
products when given a ramp signal from 0-10 volts. command signal is superimposed over pressure trace.
Characteristics would be similar for 4-20 mA units. Time is determined by difference between command
signal and pressure achieved.

FLOW CHARACTERISTICS

QB3 Forward Flow
120 (8.27)
Fluid: Air QB3 flow characteristics from no
100 (6.82) Primary Pressure: 110 Psig (7.58)
Bar) flow to full flow conditions.
PSI (BAR) 80 (5.52) assembly flow characteristics.
Consult factory for sub-base
60 (4.14)
40 (2.16)

20 (1.38)

0
10 (4.72) 20 (9.44) 30 (14.16) 40 (18.88) 50 (23.60)
SCFM (Liters/sec)
QB3 Relief Flow
100 (6.82)

80 (5.52)
PSI (BAR) 60 (4.14)

40 (2.16)

20 (1.38)
QB3 flow characteristics from
full flow to no flow conditions.
Consult factory for sub-base
10 (4.72) 20 (9.44) 30 (14.16) 40 (18.88) 50 (23.60)
assembly flow characteristics.
SCFM (Liters/sec)

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