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Masoneilan SVI II ESD Quick Start Guide
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Table 16: Pneumatics Single Acting Standard Flow
Air Supply
Dry, oil-free, 5 micron filtered air (See ISA S7.3)
Action
Direct
Supply Pressure
30 -120 psi max. (2.07 - 8.27 bar, 207 - 827 kPa)
Regulate 10 psi above actuator spring range. Do not
exceed actuator rating.
Air Delivery - Single Acting Relay
11.55 scf/min (325 sL/min) filling, 14.12 scf/min (400
sL/min) venting at 30 psi (2.1 bar, 207 kPa) supply
19.25 scf/min (545 sL/min) filling, 23.48 scf/min (665
sL/min) venting at 60 psi (4.14 bar, 414 kPa) supply
27 scf/min (765 sL/min) filling, 32.84 scf/min (930 sL/
min) venting at 90 psi (6.21 bar, 621 kPa) supply
34.6 scf/min (980 sL/min) filling, 42.37 scf/min (1200
sL/min) venting at 120 psi (8.28 bar, 828 kPa) supply
Air Capacity (flow coefficient)
Loading CV = 0.57
Venting CV = 0.53
Air Consumption
0.212 scf/min (6 sL/min) at 30 psi (2.1 bar, 207 kPa)
supply
0.282 scf/min (8 sL/min) at 60 psi (4.14 bar, 414 kPa)
supply
0.424 scf/min (12 sL/min) at 90 psi (6.21 bar, 621 kPa)
supply
0.529 scf/min (15 sL/min) at 120 psi (8.28 bar, 828
kPa) supply
Air Supply Failure
On supply failure the actuator output P1 falls to 0 psi.
Loss of Input Signal
Output drops to low pressure.
Output Pressure
120 psi (8.28 bar, 828 kPa) max
CV
0.59 filling, 0.72 venting
Sweet Natural Gas
H
2
S content not more than 20 ppm
