Flowserve MARK 3 GROUP 4 User Manual

Page 19

MARK 3 GROUP 4 USER INSTRUCTIONS ENGLISH 71569286 08-12

Page 19 of

flowserve.com

jackscrews are not provided, shims and wedges

should be used. (See Figure 4-5.) Check for

levelness in both the longitudinal and lateral

directions. Shims should be placed at all base

anchor bolt locations. Do not rely on the bottom

of the baseplate to be flat. Standard baseplate

bottoms are not machined and it is not likely that

the field mounting surface is flat.

c) After leveling the baseplate, tighten the anchor

bolts. If shims were used, make sure that the

baseplate was shimmed near each anchor bolt

before tightening. Failure to do this may result in

a twist of the baseplate, which could make it

impossible to obtain final alignment.

d) Check the level of the baseplate to make sure

that tightening the anchor bolts did not disturb

the level of the baseplate. If the anchor bolts did

change the level, adjust the jackscrews or shims

as needed to level the baseplate.

e) Continue adjusting the jackscrews or shims and

tightening the anchor bolts until the baseplate is

level.

f) Check initial alignment. If the pump and motor

were removed from the baseplate proceed with

step g) first, then the pump and motor should be

reinstalled onto the baseplate using Flowserve’s

factory preliminary alignment procedure as

described in section 4.5, and then continue with

the following. As described above, pumps are

given a preliminary alignment at the factory. This

preliminary alignment is done in a way that

ensures that, if the installer duplicates the factory

conditions, there will be sufficient clearance

between the motor hold down bolts and motor

foot holes to move the motor into final alignment.

If the pump and motor were properly reinstalled

to the baseplate or if they were not removed from

the baseplate and there has been no transit

damage, and also if the above steps where done

properly, the pump and driver should be within

0.38 mm (0.015 in.) FIM (Full Indicator

Movement) parallel, and 2.5 mm/m

(0.0025 in./in.) FIM angular. If this is not the

case, first check to see if the driver mounting

fasteners are centered in the driver feet holes. If

not, re-center the fasteners and perform a

preliminary alignment to the above tolerances by

shimming under the motor for vertical alignment,

and by moving the pump for horizontal

alignment.

g) Grout the baseplate. A non-shrinking grout

should be used. Make sure that the grout fills the

area under the baseplate. After the grout has

cured, check for voids and repair them.

Jackscrews, shims and wedges should be

removed from under the baseplate at this time. If

they were to be left in place, they could rust,

swell, and cause distortion in the baseplate.

h) Run piping to the suction and discharge of the

pump. There should be no piping loads

transmitted to the pump after connection is

made. Recheck the alignment to verify that there

are no significant loads.

Check the impeller axial clearance and that the rotor

turns freely by hand.

Note: Grout is not poured until an initial
alignment of the pump and driver has been
performed. See section 4.5

4.5 Initial alignment

The purpose of factory alignment is to ensure that the

user will have sufficient clearance in the motor holes

for final job-site alignment. To achieve this, the

factory has designed the mounting holes with

additional clearance to allow the pump to be aligned

in the horizontal plane to the motor, There should be

at least 1/16 clearance around the bolt. The coupling

has been designed to have some overhang of the

coupling hub (in most cases 1 or both hubs may be

overhung between 0.0 and 3 mm (0 and 0.12 in)

unless otherwise stated. This procedure ensures that

there is sufficient clearance in the motor holes for the

customer to field align the motor to the pump, to zero

tolerance. This philosophy requires that the customer

be able to place the base in the same condition as

the factory. Thus the factory alignment will be done

with the base sitting in an unrestrained condition on a

flat and level surface. This standard also emphasizes

the need to ensure the shaft spacing is adequate to

accept the specified coupling spacer.