Field Technician Commissioning Activities; Reinstallation Of The Actuator Assembly - Emerson Fisher Multiport Flow Selector Instruction Manual

Instruction Manual
D104239X012
Key numbers in this procedure are shown in figure 2 and 3 unless otherwise indicated.
Before installing the unit, observe all warning tags and:
1. Check for external physical damage.
2. Check for any visible leakage of gear oil from the Multiport Electric Actuator (MPA).
3. Visually inspect the inside of the Multiport through the group outlet port checking for damage, rust, and/or debris.
4. Verify the voltage requirement of the MPA (AC/DC) and connect power supply and signal circuits to test the
operation of the electric actuator and plug. Check for proper plug alignment at each port.
5. Inspect connecting piplines to be certain they are free of foreign material such as pipe scale or weld slag that could
damage the sealing surfaces fo the Multiport Flow Selector valve.
6. Provide appropriate flange gaskets and install them between the pipe flanges and valve body flanges. Tighten
flange bolting in a star pattern to ensure uniform compression of the gaskets.
Note
To prevent seal damage when hydrotesting external piping, position the plug midway between two inlet ports in order to equalize
pressure between the plug and valve body.
The Multiport Flow Selector plug/port alignment is factory adjusted when supplied with an actuator and should not require further
adjustment.

Field Technician Commissioning Activities

Refer to the Multiport Actuator (MPA) O&M Manual — Supplied by Bettis (MPA-400-0711). See page 19 for detailed
commissioning activities.
CAUTION
Replace pipe plug with breather before operating unit. The valve body may be pressurized from hydrostatic testing. Do not
remove any bolts or flanges for inspection until after the unit has been depressurized.
Circuit boards are susceptible to damage from static discharge when touched. Ensure that you ground yourself before
touching the knobs on the electric actuator.

Reinstallation of the Actuator Assembly

1. Using a manual wrench, rotate the plug (key 2) a few revolutions to verify it turns freely. Initial effort required to
rotate the plug could be high if the plug has not been rotated for an extended period of time.
2. Secure the actuator mounting bracket (key 43) to the bonnet using two cap screws (key 44), two travel indicator
studs (key 54), and four lock washers (key 56). For the NPS 2x4 construction, secure the lower plate to the bonnet
using two cap screws, two travel indicator studs and nuts, and four lock washers.
Regardless of size, apply an anti-seize lubricant (key 40) to the threaded portion of the fasteners. The cap screws
should be spaced 180 degrees apart from one another and 90 degrees apart from the travel indicator studs.
3. Secure the travel indicator plate to the travel indicator studs by tightening two cap screws (key 55). Proper
assembly has occurred if the lock washers have been placed between the travel indicator studs and travel indicator
plate and if flat washers (key 57) have been placed between the cap screws and travel indicator plate. For the 2x4
construction, place travel indicator spacers over the travel indicator studs and secure the travel indicator plate
Multiport Flow Selector
January 2019
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