Xylem IMVIC R01 Model VIC Vertical Industrial Turbine Can Pumps - Manual (Page 13)

13
Check that the split gland is square in the
stuffing box. Cocking can cause uneven
compression of packing and damage to the shaft or sleeve
and heat up the shaft and stuffing box.
7. The stuffing box is shipped with both ports plugged.
If the discharge pressure is over 100 psi, remove the
plug on Port “A” and attach a bypass (relief) line. If
the discharge pressure is over 200 psi, remove the
plug on Port “B” and attach another bypass line.
8. Final adjustment of the stuffing box must be made at
pump start up.
9. A properly packed stuffing box should be loose
enough to allow the shaft to be turned manually
and must have leakage (see page 22 – Packing
Adjustment).
Do not over tighten packing or excessive
wear can occur on the shaft or sleeve.
Figure 6
INSTALLING THE MECHANICAL SEAL
The vertical turbine pumps are usually supplied with
cartridge type mechanical seals, shipped assembled
- ready for installation, when mechanical seals are
supplied. Instructions for installing mechanical seals
are provided by the seal manufacturer. Consult the seal
manufacturer’s instructions (furnished with the seal) for
information on the type of seal used. Additionally, refer
to factory furnished outline drawing and seal piping
schematic on complex seal piping arrangements.
GENERAL REQUIREMENTS FOR ALL SEALS
1. Check surfaces at the face of the seal housing and
at the bottom of the seal housing to insure that they
are clean, flat and free of burrs. The face surface
must be smooth to form a good sealing surface for a
gasket or O-ring.
2. Check that shaft is smooth, and free of burrs, nicks
and sharp corners that could ruin the O-ring or
shaft packing. When further clean up is required,
protect by covering the inside of the pump seal
housing. Remove burrs, nicks and sharp corners by
using a strip of emery cloth over the shaft threads.
File threads around the keyway with a smooth mill
file or emery cloth. Sharp edges must be rounded.
3. Remove all chips and dust from the shaft area.
4. Check that all rotary unit parts of the seal fit over
the shaft. A pre-check may be made by removing the
O-ring(s) from the cartridge sleeve Inside Diameter
(ID) and then installing the seal on the shaft. Further
shaft clean up will be necessary when the seal will
not pass all the way into the seal housing.
5. Remove the seal after the pre-check, and re-install
the sleeve O-ring(s).
6. Sparingly lubricate the shaft and sleeve ID with
the lubricant included with the mechanical seal or
recommended by the mechanical seal manufacturer.
The following lubricants may be used, for water ser-
vice, when no lubricant is supplied or recommended
by the mechanical seal manufacturer.
• Light oil (SAE #10 or 20)
• Dow Corning #4 Grease
• Silicone lubricant
• Wax or clay
• Soapy water
Oil based lubricants will damage EPR / EPDM
elastomer O-rings. Silicone lube and soapy water are
safe for EPR / EPDM elastomer O-rings.
7. Install the O-ring or gasket, between the seal
housing and seal. Install the seal over the shaft and
ease it into position against the face of the seal box.
Take care when passing the sleeve and O-ring over
keyways or threads to avoid damaging the O-ring.
Do not bump carbon members against the
shaft as they may chip, crack or break.
8. Position seal gland on discharge head seal housing
and secure with capscrews (or nuts for studs)
provided. Tighten capscrews gradually and
uniformly in a criss-cross pattern, taking 2 or 3
passes.
Do not over tighten capscrews on gland.
This can distort seal seat and cause seal
failure.
9. Install all seal piping as required. Prior to making
final connections of sealing liquid pressurizing
lines, make sure the seal housing and all sealing
liquid lines are flushed free of dirt, scale and other
particles that would be abrasive to the sealing faces.
10. The Driver and Coupling must now be installed
before the driver installation can proceed. See page
14 - INSTALLATION OF A HOLLOW SHAFT
DRIVER or page 16 - INSTALLATION OF A
SOLID SHAFT DRIVER as appropriate.
CAUTION
CAUTION
CAUTION
CAUTION
(619) STUD (2)
(735) HEX NUT
(2)
PORT "A"
PORT "B"
(622) LANTERN
RING
(624) BYPASS LINE
(618) GLAND
(621) O-RING
(620) PACKING
(6 RING)
(616)
STUFFING BOX
(617) BEARING