Connecting The Tubing And Air Supply; Pneumatic Connections/Air Supply Requirements - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Smart valve interface with sil3 emergency shutdown pst controller

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Connecting the Tubing and Air Supply

This section describes the process for connecting the tubing and air supply to a single acting

PST controller.

Pneumatic Connections

The SVI II ESD is intended for use with industrial compressed air or natural gas systems only

that meet the requirements of ISA standard 7.3. Supply pressure must not exceed 120 psi. A

coalescing 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 7 provides the pneumatic connections and air supply

requirements for the SVI II ESD.

Table 7 Pneumatic Connections/Air Supply Requirements

Recommended Piping

Inlet/Outlet

Instrument Air Pressure 30 - 120 psi (2.07 - 8.27 bar) (207 - 827 kPa)

Dew Point

Particulate Matter

Oil Content

Contaminants

It is advisable to tube and apply the air supply to the SVI II ESD

NOTE

before connecting the electrical input signal to power it up.

For small actuators it may be necessary to use 1/8" tubing for

NOTE

Autotune to work properly.

1/2" stainless steel or PVC tubing. The length of tubing between

the SVI II ESD and the valve shall be kept as short as possible

and free of kinks

At least 18° F (-8° C) below minimum anticipated ambient tem-

perature

Filtered to 5 microns

Less than 1 ppm w/w

Free of all corrosive contaminants

Masoneilan SVI II ESD Installation and Maintenance Manual

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