Masoneilan SVI II AP Digital Positioner Quick Start Guide
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Mounting the SVI II AP
This guide provides installation instructions for mounting an SVI II AP on both rotary and recipro-
cating actuated valves. The mounting process can be broken down into the following:
Attach the mounting bracket to the actuator.
Install the magnetic assembly.
Assemble the SVI II AP on the mounting bracket.
NOTE
The SVI II AP should be mounted with the conduit connections
down in order to facilitate drainage of condensate from the
conduit.
Necessary Precautions
To avoid injury or the process being affected when installing or replacing a positioner on a control
valve, ensure that:
If the valve is located in a hazardous area make sure the area has been
certified as
safe
or that all electrical power to the area has been
disconnected before removing any covers or disconnecting any leads.
Shut off air supply to the actuator and to any valve mounted equipment.
Ensure the valve is isolated from the process by either shutting off the
process or using bypass valves for isolation. Tag shutoff or bypass valves to
guard against a
turn-on
while work is in progress.
Bleed air from actuator and check that valve is in its unenergized position.
It is now safe to disconnect and remove any valve mounted equipment that is being replaced.
For the procedure to mount rotary and reciprocating valves, refer to the Mounting Instructions
contained in the valve’s Mounting Box kit.
