29 | IM-112 DECEMBER 2019
Vertical Turbine Pumps
2001299 - VTP- IOM
29 | IM-112 DECEMBER 2019
Vertical Turbine Pumps
2001299 - VTP- IOM
29 | IM-112 DECEMBER 2019
Vertical Turbine Pumps
2001299 - VTP- IOM
Vertical Turbine Pumps
Installation
Document Name: 2001299-VTP-IOM-EN Page 29 of 67
Revision 3 Copyright © 2014, Weir Floway, Inc. All Rights Reserved. Issue Date: December 12, 2014
11. Check the electric driver for rotation at this time. Establish electrical connections and run the motor
briefly to check the rotation. Driver must rotate in counter clockwise direction when viewed from the top
end of the motor.
a. To change the direction of rotation on a three phase motor, interchange any two line leads.
b. To change direction of rotation on a two phase motor, interchange the leads of either phase.
12. For pumps using a spacer type coupling, bolt the spacer to the driver half coupling.
13. Thread the adjusting nut up until there is 1/8
gap between the nut and the spacer or driver half coupling
(refer to Figure 5-7 on page 32).
14. Refer to “Impeller Adjustment - General” on page 29 for impeller adjustment.
15. Adjust mechanical seal after adjusting the impellers (refer to “Mechanical Seal” on page 33).
5.8 Impeller Adjustment - General
• Proper impeller adjustment positions the impeller inside the bowl assembly for maximum performance.
• The impellers must be raised slightly to prevent dragging on the bowls.
Impellers are of two basic types: enclosed and semi-open (also referred to as semi-enclosed). The type and
size of impeller, as well as the application, determine what the proper impeller adjustment must be. The type
of impellers installed in the pump can be determined from the pump nameplate or packing slip. If the second
letter of the pump type is K, it is an enclosed impeller and if the letter is O, then it is a semi-open impeller.
Hence DKM indicates enclosed impellers, while DOM indicates semi-open impellers (refer to Figure 5-6 on
page 30).
CAUTION
DAMAGE TO THE PUMP
• Before jogging the motor make sure the coupling halves are not touching and the motor
shaft end is sufficiently clear of the pump shaft and adjusting nut, and the driver can
rotate freely without rotating the pump. The driver half coupling must be in proper position
as shown in Figure 5-5 on page 28 so that the split circular thrust ring does not come out.
• Always check rotation before connecting the driver to the pump as reverse rotation while
the pump is connected can cause extensive damage to the pump.
NOTICE
Adjusting nuts have drilled holes on the outside diameter for inserting handle of hex wrench
or round bar to facilitate adjustment.
DANGER
PERSONNEL INJURY AND EQUIPMENT DAMAGE
Never operate the pump without properly adjusting the impellers. Operating the pump
without proper adjustment could result in catastrophic damage to the equipment and injury
to personnel from projectiles.
To Next Page
Loading...
