Walrus Systemflo SLB-C Series User manual

Installation and Operation Manual
SLB-C, SLB-S, SLB-N SERIES
VERTICAL MULTISTAGE CENTRIFUGAL PUMPS

SLB-C, SLB-S, SLB-N
1. Model numbering and nameplate format
1.1 Model numbering
Example: SLB-C, SLB-S, SLB-N 5 16 SQQE
Code for shaft seal
Number of stages
Nominal ow(m3/h)
Type ranges
2. Handling
Read these instrucons carefully before beginning installaon.
Li and handle these pumps carefully.
SLB-C, SLB-S, SLB-N series are vercal mul-stage non-self priming pumps coupled with standard electric motors.
This manual applies to standard version pumps and for standard applicaons.
Contact your supplier or the factory for informaon about special pump versions and applicaons.
3. Application
SLB-C, SLB-S, SLB-N series in-line pumps are designed for a wide range of applicaons in various industries–water treatment,
water boosng, water supply, cooling, cleaning, etc.
3.1 Pumped liquids
The pumps are designed for use with clean, non-explosive liquids that do not contain abrasive material.
These pumps are not designed to be used with abrasive, solid containing, explosive and corrosive liquids. For special appli-
caon, please contact your supplier or the factory.
1.2 Nameplate format
1. Pump Type–Seal Type
2. Pump Model
3. Frequency
4. Rated Power
5. Speed
6. Maximum Head
7. Capacity
8. Head Range
9. Maximum Operang Pressure
10. Rotang Direcon
11. Serial Number

SLB-C, SLB-S, SLB-N
4. Technical Data
4.1 Temperatures
¾Ambient temperature: 0°C to +50°C
If ambient temperatures are above +40 degrees C, or if the pump is located at elevaons more than 1,000 meters above
sea level, the motor’s output must be derated to compensate for less eecve cooling, and may have to be replaced with
a larger size motor.
¾Liquid temperature: -15°C to + 120°C
4.2 Minimum inlet pressure-NPSH
¾To avoid cavitaon, make sure that there is a minimum pressure on the sucon side of the pump
NPSHA : Net Posive Sucon Head Available
--The NPSHA is a funcon of the pump sucon system
NPSHR : Net Posive Sucon Head Required
--The NPSHR is a funcon of the pump design at the operang point on the pump performance curve
NPSHA=Ha-Hs-Hf-Hv-Hst(in meters head)
Ha : Barometric pressure (That can be set to 10.2 m.)
Hs : Sucon li
Hf : Fricon loss in sucon pipe
Hv=KT+KH : Vapor pressure
KT : Flow resistance due to liquid temperature
KH : Flow resistance due to elevaon above sea level
If the liquid is water, you can consult the tables to determine the values of KT and KH.
Hst : Safety margin (minimum: 0.5 meters head)
NPSH A> NPSH R : Pump running will be ne
NPSH A> NPSH R: Pump will be dry running or cavitang
¾Stop operaon of the pump if cavitaon occurs. Cavitaon will cause pump damage and the resultant damage is not sub-
ject to warranty.
4.3 Minimum nominal ow rate
¾To prevent overheang of the internal pump components, the pump should not be used at ows below the minimum ow
rate.
Do not run the pump against a closed discharge valve for longer than a few seconds. The curve below shows the mini-
mum ow rate as a percentage of the nominal ow rate in relaon to the liquid temperature.

SLB-C, SLB-S, SLB-N
4.4 Electrical data
Make sure that the supply voltages, phase and frequencies correspond to the motor specicaons.
4.5 Number of starts per hour
Motors up to and including 4 kW : Maximum 100 mes per hour.
Motors of 5.5 kW and up : Maximum 40 mes per hour.
For other manufacturer’s motors, check their instrucons for the maximum frequency of starts.
5. Installation
Always refer to the local or naonal regulaons and codes relang to the selecon of the installaon site, the water and power
connecons, etc.
5.1 Position
Pumps should be installed in a protected environment–not exposed to weather. Make sure that there are no obstrucons to
prevent proper motor cooling.
5.2 Anchoring
The pump must be secured to a solid foundaon by bolts through the holes in the ange or base plate.
An illustraon on page 8 shows the bolt locaon and the pipe connecons.
5.3 Installation Example
When posioning and installing the pump, follow the installaon examples in the next page in order to avoid damaging the
pump.

SLB-C, SLB-S, SLB-N
Pos. Description
1 Pipe support: Support piping system properly to avoid stresses on connections.
2On-o󰀨 valves: Install on-o󰀨 valves for easy access before the pump intake and after the pump dis-
charge.
3Use exible piping on both input and output sides of the pump to reduce vibration and transmission of
noise.
4Check valves will prevent return ow of pumped liquid when pump is stopped, reducing the danger of
pump damage
5Make sure that the control panel conforms to local standards and regulations.
6Do not place elbows next to the pump intake and discharge.
7If pump needs to be operated with on-o󰀨 valve closed, install a bypass line to avoid damaging the
pumping system.

SLB-C, SLB-S, SLB-N
Pos. Description
8If it is necessary to increase the diameter of the suction pipe, place an eccentric reducer between the
check valve and the exible pipe section.
9Using elbows will increase the ow resistance. Wide bends will result in lesser ow resistance.
10 The piping must have a level or positive gradient to prevent the formation of air pockets.
11 The diameter of the drop pipe must be larger than the diameter of the pump’s suction port.
12 Use a foot valve in case of negative suction head.
13 Size pump for correct head.
14 Place the intake of the suction pipe so that the intake is always submerged to prevent entry of air.
15 Install a compound gauge at the pump suction and a pressure gauge at the pump discharge.

SLB-C, SLB-S, SLB-N
6. Electrical Connection
¾All electrical connecons should be in accordance with the local regulaons and carried out by a qualied electrician.
¾Make sure that the supply voltages, frequencies, and phase are suitable for the motor specicaons.
¾Before proceeding, make sure that all the connecons are grounded and well insulated.
¾Overload protecon should be provided.
¾Wiring informaon is shown on the inside of the terminal box cover.
¾The terminal box can be turned to four posions.
¾Check the direcon of rotaon is consistent with the direcon marked on the fan cover (three-phase motor only).
¾Make sure that the controls are properly grounded.
¾We strongly recommend installing dry running protecon.
7. Start-up
The pump and sucon pipe should be lled with liquid before start-up to prevent dry running.
Dry running can damage the pump bearing and sha seal.
7.1 Operation
¾Start the pump and check the direcon of rotaon of the motor (three-phase motors).
¾Start the pump while the on-o valve of the discharge is closed. Right aer start-up, open the on-o valve slowly. The pump
should be running smoothly and quietly. Otherwise, it may be necessary to re-prime the pump.
¾Check the current draw of the power. If necessary, adjust the seng of the thermal relay.
¾Air pockets trapped inside the pump may be released by adjusng the air screw.
If the pump is installed in a locaon that may be exposed to freezing when not in operaon, the pump and the pipe system
must be drained to prevent freezing damage.

SLB-C, SLB-S, SLB-N
7.1 Operation
¾It is recommended to open the bypass valve during start-up. The bypass valve that connects the sucon and discharge of the
pump will make the lling procedure easier. When the operaon is stable, the bypass valve can be closed.
¾If the pumped liquid contains air or the operang pressure is lower than 6 kg/cm², it is advisable to leave the bypass valve
open. If the operang pressure constantly exceeds 6 kg/cm², the bypass valve must be closed. Otherwise, the material at the
opening will be worn out because of the high liquid velocity.

SLB-C, SLB-S, SLB-N
8. Maintenance
Before starng maintenance work on the pump, the motor, or other parts of the system, make sure that the power supply
has been switched o.
¾The pump does not need a regular maintenance schedule.
¾If the motor is ed with grease nipples, the motor should be lubricated with a high temperature, lithium-based grease.
¾If the pump and motor are not regularly in use, with long intervals of non-operaon, the motor must be greased before
restarng.
9. Troubleshooting
Fault Probable Cause Possible Solution
Pump does not run when the motor starter
is activated
Supply failure or no power supply Check connections or restart the power supply
Main contacts in motor starter are not making contact or the
motor coils are defective Reconnect or replace contacts or magnetic coil
Pump or auxiliary circuits protection fuses blow Replace fuses
Pump or piping system may be obstructed, causing a jam Clean the obstruction and restart pump
Motor may have failed Replace the motor
Motor protector or thermal relay has tripped out Reset the motor or thermal protector
Tripping of anti-dry running protection Check the water level in the tank or the water system pressure.
If everything is in order, check the protection device and its
connection cables
Starter overload trips immediately when the
power is switched on
Overload setting is too low Set the motor starter correctly
The cable connection is loose or faulty Fasten or replace the cable connection
One fuse is blown Replace fuse and try starting again
Pump is jammed by an obstruction Check and clean obstruction from system
Contacts in overload are faulty Replace motor starter contacts
The motor winding is defective Replace the motor
Low voltage (especially at peak time) Check the power supply
The pump starts but, after a short time, the
thermal protector trips out or the fuses blow
The voltage is not within the motor’s operating limits Check the operating conditions of the pump
The control panel is situated in an excessively heated area or is
exposed to direct sunlight Protect the control panel from heat sources and from the sun
A phase in the power supply is missing Check the power supply
The pump starts up but, after a period of
time, the thermal protector trips
Worn motor bearings causing motor to overheat Replace motor bearings
The pump’s delivery rate is higher than the specied rate on the
pump nameplate
Partially close the on-o󰀨 valve located discharge side until the
delivery rate returns to within the specied limits
There are obstructions inside the pump or pumping system Disassemble and clean the pump and piping
Less viscous liquids may cause the motor to work too hard and
overload the motor, causing the motor to overheat
Check the actual power requirements based on the charac-
teristics of the liquid being pumped, and replace the motor
accordingly
Water delivered
Pump is not primed with liquid Fill the pump with the liquid to be pumped
The pump, suction or discharge pipes are blocked by solids in
the liquid being pumped Clean the pump, suction or discharge pipe
The foot or check valve is blocked or has failed Replace the foot or check valve
The suction pipe leaks Repair or replace the suction pipe
The air is in the suction pipe or pump Remove trapped air from system
Motor operating in the wrong direction (three-phase motor) Change the direction of rotation of the motor by reversing motor
connections
The pump capacity is not constant
The pump draws in air or the inlet pressure is too low Improve the suction conditions
The pump or the suction side of the piping system partly blocked-
by foreign bodies Clean the pump or suction pipe
The system’s general protection cuts in Short circuit Check electrical system
The pump rotates in the wrong direction
when switched o󰀨
The foot or the check valve has failed Check and replace check valve
Leakage in the suction pipe Repair or replace the suction pipe

SLB-C, SLB-S, SLB-N
Fault Probable cause Possible Solution
The frequency of pump start-up is too high Leakage in the foot valve, check valve or system Repair or replace the components
Ruptured membrane or no air pre-charge in surge tank See relevant instructions in surge tank’s manual
Vibration and noise
Cavitation Reduce the required ow or improve the operating conditions
of the pump (suction conditions, head, ow resistance, liquid
temperature,viscosity,…etc.)
Make sure that pump and motor shafts are properly aligned Adjust the pump and/or motor shafts
Worn motor bearings Replace the bearings or the motor
Operation with frequency converter Consult a qualied engineer form the supplier of the frequency-
converter
Check vibration and noise damping devices Replace vibration & noise dampers, if worn

Walrus America Inc.
20220 Hempstead Road, Suite #30
Houston, TX 77065
Tel:[phone]
Fax:[phone]
E-mail: [e-mail]
LIMITED WARRANTY
Systemo pumps are warranted to the rst user only to be free of defects in material and workmanship for a period of 12 months from
date of installaon, but no more than 24 months from date of shipment. Systemo’s liability under this warranty shall be limited to
repairing or replacing at our discreon, without charges, FOB Systemo’s distribuon center or authorized service agent. Systemo will
not be liable for any cost of removal, installaon, transportaon, or any other charges that may arise in connecon with warranty claim.
The warranty period commences on the date of original purchase of the equipment. Proof of purchase and installaon date, failure
date, and supporng installaon data must be provided when claiming repairs under warranty.
This warranty is subject to due compliance by the original purchaser with all direcons and condions set out in the installaon and op-
erang instrucons. Failure to comply with these instrucons, damage or breakdown caused by fair wear and tear, negligence, misuse,
incorrect installaon, inappropriate chemicals, or addive in the water, inadequate protecon against freezing, rain or other adverse
weather condions, corrosive or abrasive water, lightning or high voltage spikes or through unauthorized persons aempng repairs are
not covered under warranty.
Systemo will not be liable for any incidental or consequenal damages, losses, or expenses arising from installaon, use, or any other
causes. There are no express or implied warranes, including merchantability or tness for a parcular purpose, which extend beyond
those warranes described or referred to above.
Certain states do not permit the exclusion or limitaon of incidental or consequenal damages or the placing of limitaons on the du-
raon of an implied warranty, therefore, the limitaons or exclusions herein may not apply. This warranty sets forth specic legal rights
and obligaons, however, addional rights may exist, which may vary from state to state.