© 2018 Baker Hughes, a GE company, LLC. All rights reserved.
Masoneilan SVI II ESD Quick Start Guide
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35
Connecting the Tubing and Air Supply
NOTE
When an SVI II ESD is turned on it is advisable to apply the air
supply before applying the electrical input signal.
NOTE
For small actuators it may be necessary to use 1/8" tubing for
Autotune to work properly.
This section describes the process for connecting the tubing and air supply to a PST Controller.
Pneumatic Connections
The SVI II ESD is intended for use with industrial compressed air or natural gas systems only that
meets the requirements of ISA standard 7.3. Supply pressure must not exceed 120 psi. A coalesc-
ing filter can be used to assure that the supply air is sufficiently free of oil, water, and particulate
contaminants. Ensure that an adequate pressure relief provision is installed when the application
of system supply pressure could cause peripheral equipment to malfunction. Installation must be
in accordance with local and national compressed air and instrumentation codes. Table 4 pro-
vides the pneumatic connections and air supply requirements for the SVI II ESD.
Table 4: Pneumatic Connections and Air Supply Requirements
Recommended
Piping Inlet/Outlet
1/2” stainless steel or PVC tubing. The length of tubing between the SVI
II ESD and the valve must be kept as short as possible and free of kinks
Instrument Air
Pressure
30 - 120 psi (2.07 - 8.27 bar) (207 - 827 kPa)
Dew Point
At least 18° F (10° C) below minimum anticipated ambient temperature
Particulate Matter
Filtered to 5 microns
Oil Content
Less than 1 ppm w/w
Contaminants
Free of all corrosive contaminants
