Masoneilan SVI II AP Installation and Maintenance ... - GE Energy

Physical and Operational
Table 24
High Flow Pneumatics Single Acting High Flow
Air Supply
Action
Supply Pressure
Dry, oil-free, 5 micron filtered air
(See ISA S7.3)
Direct Acting
20 -100 psi max. (1.4 - 6.9 bar)
Regulate 5 - 10 psi (.345 bar - .69 bar) above actuator spring range.
Do not exceed actuator rating.
Air Delivery - Single Acting Relay
Air Capacity
(flow coefficient)
Air Consumption
39.0 scfm (1100 l/m) at 30 psi (2.1 bar) supply
70.6 scfm (2000 l/m) at 60 psi (4.2 bar) supply
102.0 scfm (2900 l/m) at 90 psi (6.2 bar) supply
Loading CV = 2.2
Venting CV = 2.2
0.28 scfm (8.0 sl/m) at 30 psi (2.1 bar) supply
0.35 scfm (10 sl/m) at 45 psi (3.1bar) supply
Air Supply Failure
Single Acting Relay
On supply failure the actuator output drops. Some overshoot may
occur when air pressure returns after a period without air supply
pressure. Always set control set point to 0%, and put the process
control system in manual, for smooth recovery from air supply
failure.
Loss of Input Signal
Output Pressure
Output drops to low pressure.
0-150 psi (10.3 bar) max
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