Viking 823 User Manual
TECHNICAL SERVICE MANUAL
MAGNETIC DRIVE PUMPS
SERIES 823 - STEEL
825 - CAST IRON
827 - STAINLESS STEEL
SIZES LQ, LS, Q & QS
SECTION TSM 845.1
PAGE 1 OF 13
ISSUE C
CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . 1
Special Information . . . . . . . . . . . . . . . . . . . 3
Pressure Relief Valves . . . . . . . . . . . . . . . . . 3
Maintenance . . . . . . . . . . . . . . . . . . . . . . 3
Disassembly: Pump. . . . . . . . . . . . . . . . . . . 6
Pump Rotation . . . . . . . . . . . . . . . . . . . . . 7
Port Arrangement . . . . . . . . . . . . . . . . . . . . 7
Disassembly: MD-D Series Coupling . . . . . . . . . . 7
Bearing Housing . . . . . . . . . . . . . . . . . . . . 9
Disassembly of Bearing Housing
Assembly of Bearing Housing . . . . . . . . . . . .
Installation of Bushings . . . . . . . . . . . . . . . . . 9
Pump Assembly. . . . . . . . . . . . . . . . . . . . .10
Adjusting Head Gasket End Clearance . . . . . . . . 11
Assembly: D Series Coupling . . . . . . . . . . . . . 11
Troubleshooting. . . . . . . . . . . . . . . . . . . . 12
Pressure Relief Valves . . . . . . . . . . . . . . . . 12
Pressure Adjustment
Disassembly: Relief Valve. . . . . . . . . . . . .
Assembly: Relief Valve
. . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . 13
WARNING !
Persons with surgical implants of a
metallic or electronic nature should
avoid working on pump – especially the
inner magnet assembly.
. . . . . . . . . . 9
INTRODUCTION
The illustrations used in this manual are for identification
purposes only and should not be used for ordering parts.
Secure a parts list from the factory or a Viking® representative.
Always give the complete name of the part, model and serial
number of the pump when ordering repair parts. The pump
model and serial number can be found on the nameplate
secured to the pump.
In the Viking model number system, the basic size letters are
combined with series number (825, 823, or 827) indicating
basic pump construction material (cast iron, steel or stainless
9
steel).
MODEL NUMBER CHART
UNMOUNTED PUMP UNITS
LQ-825, 823, 827
13
LS-825, 823, 827
Q-825, 823, 827
QS-825, 823, 827
This manual deals only with Series 825, 823 and 827 magnetic
drive pumps and couplings. Refer to Figures 1 through
21 for general configurations and nomenclature used in this
manual. Pump specifications and recommendations are listed
in Catalog Section 845.
Units are designated by the unmounted pump model numbers
followed by the magnetic coupling
size and a letter indicating drive style:
B – Bracket Mount
R – Viking Reducer Drive
P = Commercial Reducer Drive
(Example: LS-827 MD-D140 R)
FIGURE 1
LS-825 MD-D290 R
Complete Unit on Base with Viking “C” Reducer
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
FIGURE 2
QS-825 MD-D450 B
Bearing Carrier, Footed Pump and Coupling Bracket
Jacketed Pump Bracket
SAFETY INFORMATION AND INSTRUCTIONS
IMPROPER INSTALLATION, OPERATION OR MAINTENANCE OF PUMP MAY CAUSE SERIOUS INJURY
OR DEATH AND/OR RESULT IN DAMAGE TO PUMP AND/OR OTHER EQUIPMENT. VIKING’S WARRANTY
DOES NOT COVER FAILURE DUE TO IMPROPER INSTALLATION, OPERATION OR MAINTENANCE.
THIS INFORMATION MUST BE FULLY READ BEFORE BEGINNING INSTALLATION, OPERATION OR
MAINTENANCE OF PUMP AND MUST BE KEPT WITH PUMP. PUMP MUST BE INSTALLED, OPERATED
AND MAINTAINED ONLY BY SUITABLY TRAINED AND QUALIFIED PERSONS.
THE FOLLOWING SAFETY INSTRUCTIONS MUST BE FOLLOWED AND ADHERED TO AT ALL TIMES.
Symbol
Legend :
!
!
!
!
!
WARNING
!
WARNING
Danger - Failure to follow the indicated
instruction may result in serious injury
!
or death.
BEFORE opening any liquid chamber (pumping
chamber, reservoir, relief valve adjusting cap fitting,
etc.) be sure that :
● Any pressure in the chamber has been completely
vented through the suction or discharge lines or
other appropriate openings or connections.
● The pump drive system means (motor, turbine,
engine, etc.) has been “locked out” or otherwise
been made non-operational so that it cannot be
started while work is being done on the pump.
● You know what material the pump has been
handling, have obtained a material safety data
sheet (MSDS) for the material, and understand
and follow all precautions appropriate for the safe
handling of the material.
BEFORE
are in place.
DO NOT operate pump if the suction or discharge
piping is not connected.
DO NOT place fingers into the pumping chamber or
its connection ports or into any part of the drive train
if there is any possibility of the pump shafts being
rotated.
DO NOT exceed the pumps rated pressure, speed, and
temperature, or change the system/duty parameters
from those the pump was originally supplied, without
confirming its suitability for the new service.
BEFORE
● It is clean and free from debris
● all valves in the suction and discharge pipelines
are fully opened.
● All piping connected to the pump is fully supported
and correctly aligned with the pump.
● Pump rotation is correct for the desired direction
of flow.
operating the pump, be sure all drive guards
operating the pump, be sure that:
WARNING
WARNING
!
WARNING
!
!
!
WARNING
!
WARNING
Warning - In addition to possible serious
injury or death, failure to follow the
indicated instruction may cause damage
to pump and/or other equipment.
INSTALL pressure gauges/sensors next to the
pump suction and discharge connections to monitor
pressures.
USE extreme caution when lifting the pump. Suitable
lifting devices should be used when appropriate. Lifting
eyes installed on the pump must be used only to lift
the pump, not the pump with drive and/or base plate.
If the pump is mounted on a base plate, the base plate
must be used for all lifting purposes. If slings are used
for lifting, they must be safely and securely attached.
For weight of the pump alone (which does not include
the drive and/or base plate) refer to the Viking Pump
product catalog.
DO NOT attempt to dismantle a pressure relief valve
that has not had the spring pressure relieved or is
mounted on a pump that is operating.
AVOID contact with hot areas of the pump and/or
drive. Certain operating conditions, temperature
control devices (jackets, heat-tracing, etc.), improper
installation, improper operation, and improper
maintenance can all cause high temperatures on the
pump and/or drive.
THE PUMP must be provided with pressure protection.
This may be provided through a relief valve mounted
directly on the pump, an in-line pressure relief valve,
a torque limiting device, or a rupture disk. If pump
rotation may be reversed during operation, pressure
protection must be provided on both sides of pump.
Relief valve adjusting screw caps must always point
towards suction side of the pump. If pump rotation is
reversed, position of the relief valve must be changed.
Pressure relief valves cannot be used to control pump
flow or regulate discharge pressure. For additional
information, refer to Viking Pump’s Technical Service
Manual TSM 000 and Engineering Service Bulletin
ESB-31.
THE PUMP must be installed in a matter that allows
safe access for routine maintenance and for inspection
during operation to check for leakage and monitor
pump operation.
SECTION TSM 845.1 ISSUE C PAGE 2 OF 13
SPECIAL INFORMATION
DANGER !
Before opening any Viking pump liquid
chamber (pumping chamber, reservoir,
relief valve adjusting cap fitting etc.)
Be sure:
1. That any pressure in the chamber has
been completely vented through the
suction or discharge lines or other
appropriate openings or connections.
2. That the driving means (motor,
turbine, engine, etc.) has been “locked
out” or made non-operational so that
it cannot be started while work is
being done on pump.
3. That you know what liquid the
pump has been handling and the
precautions necessary to safely
handle the liquid. Obtain a material
safety data sheet (MSDS) for the
liquid to be sure these precautions
are understood.
Failure to follow above listed
precautionary measures may result in
serious injury or death.
DISCHARGE
SUCTION
RELIEF VALVE ADJUSTING SCREW CAP
FIGURE 3
For additional information on pressure relief valves, refer
to Technical Service Manual TSM000 and Engineering
Service Bulletin ESB-31.
MAINTENANCE
ROTATION: Viking Mag Drive® pumps are directional.
Shaft rotation determines which port is suction and which is
discharge. The port located where pumping elements (gear
teeth) come out of mesh is the suction port. Do not attempt
to operate the pump in the opposite direction. See PUMP
ROTATION on page 7.
PRESSURE RELIEF VALVES:
1. Viking pumps are positive displacement pumps and must
be provided with some sort of pressure protection. This
may be a relief valve mounted directly on the pump, an
inline pressure relief valve, a torque limiting device or a
rupture disk. Do not rely on decoupling of magnets for
protection from over pressure; this may result in damage
to the magnets, pump, or other equipment.
2. If pump rotation is to be reversed during operation,
pressure protection must be provided on both sides of
the pump.
3. The relief valve adjusting screw cap must always point
towards the suction side of the pump. Refer to Figure 3. If
the pump rotation is reversed, remove the pressure relief
valve and turn end for end (see PUMP ROTATION on
page 7 first for additional steps required for proper
operation.)
CAUTION !
Rare earth magnets used in these
couplings have extremely strong
magnetic fields capable of changing the
performance or damaging items such as
the following:
Pacemakers
Metal Implants
Watches
Computers & discs
Credit Cards
Completely assembled magnetic
couplings will not affect items listed
above.
Altered performance or damage can
occur only when the coupling halves are
separated.
There are no known harmful effects of
these magnetic fields on the human
body.
4. Pressure relief valves cannot be used to control pump
flow or regulate discharge pressure.
SECTION TSM 845.1 ISSUE C PAGE 3 OF 13
TEMPERATURE
MONITOR
(OPTIONAL)
BRACKET
BUSHINGS
BALANCE
PLATE
CASING
HEAD
GASKETS
OUTER
MAGNET
ASSEMBLY
BEARING
CARRIER
ASSEMBLY
COUPLING
BRACKET
CANISTER
INNER MAGNET
ASSEMBLY
FIGURE 4
CUTAWAY VIEW MAG DRIVE PUMP, MODEL LS-825 MD-D B ILLUSTRATED
Series 825, 823, 827 pumps are designed for long, trouble-free
service life under a wide variety of application conditions with
a minimum of maintenance. The points listed below will help
provide long service life.
CLEANING UNIT: Keep the pump, coupling and motor as
clean as possible. This will facilitate inspection, adjustment,
and repair work.
STORAGE: If the pump or coupling are to be stored, drain
the pump and pour non-detergent SAE 30 weight oil into the
pump port. Apply grease to the pump or the coupling shaft
extension, if present or accessible. Viking suggests rotating the
pump shaft every 30 days to circulate the oil in the pump. The
coupling should be stored in a dry area. Note: if the liquid to
be pumped reacts with oil, use an acceptable alternate.
CANISTER
O-RING
PUMP
BRACKET
ROTOR
IDLER
4. Snap ring pliers (heavy duty)
EXTERNAL 2-810-029-375
5. Bearing locknut spanner wrench
(Source: #471 J.H. Williams & Co. or equal)
6. Arbor press
7. Feeler gauge set
8. Bearing housing jack screws (2 required)
(Supplied with coupling 2-297-022-999)
9. Brass bar
DANGER !
HEAD
IDLER
PIN
PRESSURE
RELIEF
VALVE
SUGGESTED REPAIR TOOLS: The following tools are
required to properly repair a Mag Drive pump. These tools
are in addition to standard mechanics tools such as open end
wrenches, socket set, pliers, screw drivers, etc. Most items can
be obtained from an industrial supply house.
1. Soft headed hammer
2. Allen wrenches
3. Spanner wrench, adjustable pin type for use on end cap
(Source: #482 J.H. Williams & Co. or equal)
SECTION TSM 845.1 ISSUE C PAGE 4 OF 13
Follow recommended procedures to
assemble or disassemble magnetic
couplings.
Failure to do so may result in serious
injury.
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