Masoneilan Products SVI II ESD - GE Energy

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GE Energy SVI II ESD Quick Start Necessary Precautions To avoid injury or affecting the process when installing or replacing a PST controller 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 de-energized position. It is now safe to disconnect and remove any valve mounted equipment that is being replaced. SVI II ESD Components Figure 2 provides a drawing of the SVI II ESD components. SVI II ESD Cover SVI II ESD Assembled Pneumatic Train and Cover (I/P Module, Relay) I/P Manifold Electronics Module Pneumatic Relay Figure 2 SVI II ESD Components 16
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. 17
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Masoneilan Products SVI II ESD - GE Energy

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