Masoneilan Products SVI II ESD - GE Energy

Installation and
Mounting the SVI II ESD on Rotary Valves
Mounting the SVI II ESD on
This section describes the procedure for mounting the SVI II ESD on rotary control
valves that have less than 60° rotation, such as a Camflex or a Varimax * . Figure 3
shows a side view of a Camflex actuator and the SVI II ESD actuator mounting
brackets.
Figure 3 Camflex with Mounting Bracket (Side View)
Mounting the SVI II ESD on a Rotary Actuator
Tools required:
3⁄16" Hex Key
5⁄32" Hex Key
3 mm, 4 mm, 5 mm Hex Key
7⁄16" Wrench
To mount the SVI II ESD:
1. Attach the SVI II ESD rotary mounting bracket to the valve actuator using two
(2) 5⁄16 - 18 UNC flat-head cap screws. In the preferred mounting position, the
long end of the mounting bracket is on your left when facing the actuator, for
any position of the valve and actuator.
2. Bolt the extension shaft to the valve position take-off shaft using a 1⁄4 - 28
UNF socket flathead screw. Secure the machine screw holding the extension
shaft with a torque of 144 in-lbs (16.269 N-m).
3. On internal valve pressure the thrust shaft is pushed out to the mechanical
stops, usually a thrust bearing. On valves where the valve position take-off is
mounted directly on the end of the plug shaft, a Camflex for example, the shaft
must be bearing on its stop to properly set up the SVI II ESD PST Controller.
During hydrostatic testing the shaft is thrust to its stop and a normally
tightened packing retains it in that position.
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