Maintenance; Disassembly - Emerson Fisher Multiport Flow Selector Instruction Manual

Instruction Manual
D104239X012

Maintenance

Refer to figure 2 and 3, typical Multiport assembly and mounting drawings.
WARNING
Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the
actuator cannot suddenly rotate the plug.
D Use bypass valves or completely shut off the process to isolate the Multiport from process pressure. Relieve process
pressure from all parts of the valve. Drain the process media from all sides of the Multiport.
D Use lockout procedures to be sure the above measures stay in effect while you work on the equipment.
D Always wear protective gloves, clothing and eyewear when performing any maintenance operations to avoid personal
injury.
D The tapered roller bearing area may contain process fluids that are pressurized, even when the valve has been removed
from the pipeline. Process fluids may spray out under pressure when separating the bonnet from the plug.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
The Multiport Flow Selector valve is shipped completely greased and lubricated. Routine maintenance of this valve is
recommended, especially if it has been stored for an extended amount of time. Maintenance steps include:
1. Keeping the tapered roller bearing (key 3) greased. A high temperature silicone grease (key 39) can be injected into
the bearing housing through the lube fitting (key 28).
2. Confirming proper alignment between the plug and inlet ports.
D Verify the correct placement of the travel indicator pointer (key 50) onto the coupler (key 47).
D Align the plug (key 2) with one of the inlet ports. Confirm the travel indicator pointer is in alignment with the
selected inlet port.
3. Visual inspection of the seal insert (key 12). The sealing surface of this insert should be smooth and completely
intact.
D If the seal insert needs to be replaced, replace all o-rings (key 5, 7, 14, 20, 25, and 26), backup rings (key 6, 8, 15,
and 21), rod seal (key 4), plug bushing (key 9), and wiper seals (key 24).
4. Rotate the plug (key 2) one complete revolution using the electric actuator to confirm the assembly is functioning
properly. Check the local display unit on the electric actuator for any alarm codes.

Disassembly

Review warnings found in the Maintenance section of this manual.
Refer to figures 2 and 3 when disassembling the Multiport Flow Selector.
Multiport Flow Selector
January 2019
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