Dresser Masoneilan SVI II AP-2, Быстрый старт

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Table 14 Pneumatics Double Acting Standard Flow
Air Supply Dry, oil-free, 5 micron filtered air see ISA S7.3
Action Output 1 increases with increasing I/P signal.
Output 2 decreases with increasing I/P signal.
Supply Pressure 20 - 150 psi max. (1.4 to 10.3 bar)
Do not exceed actuator rating.
Air Delivery 7.2 scfm (200 l/m) at 30 psi (2.1 bar) supply
12.8 scfm (360 l/m) at 60 psi (4.2 bar) supply
18.3 scfm (520 l/m) at 90 psi (6.3 bar) supply
23.8 scfm (675 l/m) at 120 psi (8.4 bar) supply
Air Consumption 0.4 scfm (11.3 l/m) at 30 psi (2.1 bar) supply
0.85 scfm (22.6 l/m) at 80 psi (3.1bar) supply
Air Supply Failure When the air supply fails an SVI II AP D/A positioner cannot control the failure position of an actu-
ator without a spring. The actuator can, under different conditions, fail in place, fail open, or fail
close. In cases where the valve must fail to a required position additional control equipment is re-
quired.
Some overshoot can occur when air pressure returns after a period without air supply pressure. Al-
ways 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 1 drops to low pressure.
Output 2 rises to supply pressure.
Output Pressure 150 psi (10.3 bar) max
Specifications and References Physical and Operational Specifications
A-5