Flowserve I90 Series Intrinsically Safe Modular Accessory System - Manual (Page 5)

c. Check to see that the shaft seal has been installed as
shown in Figure 6.
CAUTIONS: When assembling cover to base be sure wires
are away from any rotating parts and are not pinched
between cover and base flanges.
Relubricate the shaft hole anytime cover is removed and
replaced.
To avoid damaging the cover hole finish and binding the
shaft to cover, check the top of the shaft for burrs or impact
damage before installing or removing cover.
2. BASE
CAUTION: Use care to avoid damaging the machined flange
surface of the base.
a. Check to see that the shaft seal and bearing have been
installed as shown in Figure 6.
b. Apply a light coat of bearing lubricant to the shaft hole.
c. Insert the shaft through the shaft hole in the base from
the inside. The shaft fits through this hole with minimal
clearance — care must be taken to avoid damaging the
bearing surfaces or causing the shaft to gall.
d. Place one of the nylon thrust washers onto the shaft end
protruding outside the base. Assemble one of the snap
rings to the shaft in the groove below this thrust washer
(rounded side towards thrust washer — see detail).
e. Place a second nylon thrust washer over the shaft and
into place against the shaft boss on the inside of the base.
Secure the shaft in place with a second snap ring in the
groove adjacent to the second thrust washer (rounded
side towards thrust washer — see detail).
f. Place the third snap ring into the upper groove as shown
in Figure 6.
g. If the base is machined to accept a breather/drain fitting
as shown in Figure 7, then the boss on the bottom of the
base near the electrical conduit connection bosses will be
tapped with C\," NPT threads. If this boss is tapped, the
breather/drain fitting must be installed. The use of
fluoropolymer tape or other thread sealant is
recommended prior to installing this fitting into the boss.
h. Plug the C\v" NPT conduit connection on the end of the
base temporarily with the threaded plastic plug provided.
This plug will be removed and discarded when the unit is
installed.
i. Plug the four Z\v" NPT and one Z\," NPT air connection
ports with the stainless steel pipe plugs provided. Thread
sealant is not recommended prior to installing these
plugs. The residue left by a thread-sealing compound
could foul the solenoid valve air passages. If a solenoid
valve option is to be installed in the unit, some of these
plugs will not be used — refer to Section III.B to
determine which plugs can be left out.
IMPORTANT: If no solenoid is to be used, all of the ports
must be plugged. Refer to Figure 7.
Flow Control Division
Worcester Controls
WCAIM2033 Intrinsically Safe Modular Accessory System (Series I90) 5
Figure 5
Figure 6