Xylem e-MPA User manual

INSTRUCTION MANUAL
P7000005
e-MPA, e-MPR, e-MPD
Horizontal Multistage Pump

Table of Contents
1 Introduction and Safety..............................................................................................................3
1.1 Introduction.......................................................................................................................... 3
1.2 Safety terminology and symbols........................................................................................3
1.3 User safety.............................................................................................................................4
1.3.1 Wash the skin and eyes................................................................................................5
1.4 Protecting the environment................................................................................................5
1.5 Spare parts and pumps.......................................................................................................6
1.5.1 Spare parts.....................................................................................................................6
1.5.2 Standby pumps............................................................................................................. 7
2 Transportation and Storage...................................................................................................... 8
2.1 Inspect the delivery..............................................................................................................8
2.1.1 Examine the unit............................................................................................................8
2.2 Transportation guidelines...................................................................................................8
2.3 Storage guidelines...............................................................................................................9
2.3.1 Long-term storage........................................................................................................ 9
3 Product Description................................................................................................................. 11
3.1 General description...........................................................................................................11
3.2 Pump denomination..........................................................................................................12
3.3 Nameplate.......................................................................................................................... 12
3.4 Pump design...................................................................................................................... 13
3.5 Material............................................................................................................................... 13
3.6 Mechanical seal..................................................................................................................14
3.7 Application limits............................................................................................................... 14
4 Installation................................................................................................................................. 17
4.1 Facility requirements......................................................................................................... 17
4.1.1 Pump location............................................................................................................. 17
4.1.2 Piping requirements...................................................................................................19
4.2 Electrical requirements..................................................................................................... 20
4.3 Install the pump................................................................................................................. 21
4.3.1 Mechanical installation...............................................................................................21
4.4 Install the coupling............................................................................................................ 23
4.4.1 Recommended torque values...................................................................................24
4.5 Coupling alignment...........................................................................................................24
4.6 Connect the power supply............................................................................................... 26
5 Commissioning, Startup, Operation, and Shutdown.......................................................... 27
5.1 Precautions......................................................................................................................... 27
5.2 Fill the pump...................................................................................................................... 28
5.3 Check the rotation direction.............................................................................................29
5.4 Start the pump....................................................................................................................29
6 Maintenance..............................................................................................................................30
6.1 Service.................................................................................................................................30
6.2 Inspection checklist........................................................................................................... 30
6.3 Disassemble and replace the pump parts......................................................................31
6.4 Repairs.................................................................................................................................31
Table of Contents
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 1

7 Troubleshooting....................................................................................................................... 32
7.1 Troubleshooting for users................................................................................................ 32
7.2 The main switch is on, but the electric pump does not start........................................32
7.3 The electric pump starts, but the thermal protector trips or the fuses blow
immediately after................................................................................................................. 32
7.4 The electric pump starts, but the thermal protector trips or the fuses blow a
short time after..................................................................................................................... 33
7.5 The electric pump starts, but the thermal protector trips a varying time after.......... 33
7.6 The electric pump starts, but the system's general protection is activated............... 33
7.7 The electric pump starts, but the system's residual current device (RCD) is
activated................................................................................................................................33
7.8 The pump runs but delivers too little or no liquid.........................................................33
7.9 The electric pump stops, and then rotates in the wrong direction ............................ 34
7.10 The pump starts up too frequently................................................................................34
7.11 The pump vibrates and generates too much noise.................................................... 34
8 Log files......................................................................................................................................36
8.1 Plant manager list.............................................................................................................. 36
8.2 Log book.............................................................................................................................36
9 Product warranty...................................................................................................................... 37
Table of Contents
2 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

1 Introduction and Safety
1.1 Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Read this manual carefully before installing and using the product. Improper use of the
product can cause personal injury and damage to property, and may void the warranty.
NOTICE:
Save this manual for future reference, and keep it readily available at the location of the
unit.
Qualified personnel
WARNING:
This product is intended to be operated by qualified personnel only.
1.2 Safety terminology and symbols
Hazard levels
Hazard level Indication
DANGER:
A hazardous situation which, if not avoided, will result in
death or serious injury
WARNING:
A hazardous situation which, if not avoided, could result
in death or serious injury
CAUTION:
A hazardous situation which, if not avoided, could result
in minor or moderate injury
NOTICE:
• A potential situation which, if not avoided, could
result in undesirable conditions
• A practice not related to personal injury
Hazard categories
Hazard categories can either fall under hazard levels or let specific symbols replace the
ordinary hazard level symbols.
Electrical hazards are indicated by the following specific symbol:
1 Introduction and Safety
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 3

Electrical Hazard:
Hot surface hazard
Hot surface hazards are indicated by a specific symbol that replaces the typical hazard
level symbols:
CAUTION:
Description of user and installer symbols
Specific information for personnel in charge of installing the product in the system
(plumbing and/or electrical aspects) or in charge of maintenance.
Specific information for users of the product.
1.3 User safety
General safety rules
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash
hazards.
• Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
Safety equipment
Use safety equipment according to the company regulations. Use this safety equipment
within the work area:
• Hard hat
• Safety goggles, preferably with side shields
• Protective shoes
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices
NOTICE:
Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.
Electrical connections
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about
requirements, see sections dealing specifically with electrical connections.
Precautions before work
Observe these safety precautions before you work with the product or are in connection
with the product:
1 Introduction and Safety
4 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that all safety guards are in place and secure.
• Make sure that you have a clear path of retreat.
• Make sure that the product cannot roll or fall over and injure people or damage
property.
• Make sure that the lifting equipment is in good condition.
• Use a lifting harness, a safety line, and a breathing device as required.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product has been thoroughly cleaned.
• Disconnect and lock out power before you service the pump.
• Check the explosion risk before you weld or use electric hand tools.
Precautions during work
Observe these safety precautions when you work with the product or are in connection
with the product:
• Never work alone.
• Always wear protective clothing and hand protection.
• Stay clear of suspended loads.
• Always lift the product by its lifting device.
• Beware of the risk of a sudden start if the product is used with an automatic level
control.
• Beware of the starting jerk, which can be powerful.
• Rinse the components in water after you disassemble the pump.
• Do not exceed the maximum working pressure of the pump.
• Do not open any vent or drain valve or remove any plugs while the system is
pressurized. Make sure that the pump is isolated from the system and that pressure is
relieved before you disassemble the pump, remove plugs, or disconnect piping.
• Never operate a pump without a properly installed coupling guard.
1.3.1 Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into contact
with your eyes or your skin:
Condition Action
Chemicals or hazardous fluids in
eyes
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
Chemicals or hazardous fluids on
skin
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
1.4 Protecting the environment
Emissions and waste disposal
Observe the local regulations and codes regarding:
• Reporting of emissions to the appropriate authorities
• Sorting, recycling and disposal of solid or liquid waste
• Clean-up of spills
Exceptional sites
CAUTION: Radiation Hazard
Do NOT send the product to Xylem if it has been exposed to nuclear radiation, unless
Xylem has been informed and appropriate actions have been agreed upon.
1 Introduction and Safety
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 5

Recycling guidelines
Always follow local laws and regulations regarding recycling.
1.5 Spare parts and pumps
WARNING:
Only use original spare parts to replace any worn or faulty components. The use of
unsuitable spare parts may cause malfunctions, damage, and injuries as well as void the
guarantee.
CAUTION:
Always specify the exact product type and part number when requesting technical
information or spare parts from the Sales and Service Department.
1.5.1 Spare parts
Spare parts stock should be defined based on the user’s risk assessment, cost of
downtime and lead times for parts. If this information is not available, the following table
can be used as a guideline.
Number of Pumps (including stand-by pumps)
2 3 4 5 6/7 8/9 10+
Impeller first
stage
1 1 2 2 2 3 30%
Impeller
(series)
i-1 i-1 i-1 2(i-1) 2(i-1) 3(i-1) 30%
Wear ring
first stage
2 2 2 4 4 6 30%
Wear ring
(series)
2(i-1) 2(i-1) 2(i-1) 4(i-1) 4(i-1) 6(-1)i 30%
Diffuser i/2 i/2 i/2 i i 3i/2 15%
Shaft (with
keys/nuts)
1 1 2 2 2 3 30%
Ball bearing 1 1 2 2 2 3 30%
Plain
bearing
1 1 2 2 2 3 30%
Balance
Drum
1 1 2 2 2 3 30%
Joints for
pump
housing
(sets)
4 6 8 8 9 12 150%
Other joints
(sets)
4 6 8 8 9 10 100%
Mechanical
seal
2 3 4 5 6 7 90%
i= number of stages
To ensure availability, we recommend that suitable quantities of spare parts are held in
stock, especially if these parts are made from special materials (due to longer delivery
times).
For more information about spare parts, contact the local sales and service representative.
1 Introduction and Safety
6 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

1.5.2 Standby pumps
Make sure that sufficient stand-by pumps are kept ready for use in plants where the failure
of a pump can endanger human life, damage property, or result in high costs. Make sure
that regular inspections are carried out to make sure that such pumps are always ready for
use.
1 Introduction and Safety
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 7

2 Transportation and Storage
2.1 Inspect the delivery
1. Check the outside of the package for evident signs of damage.
2. Notify our distributor within eight days of the delivery date, if the product bears visible
signs of damage.
Unpack the unit
1. Follow applicable step:
– If the unit is packed in a carton, then remove the staples and open the carton.
– If the unit is packed in a wooden crate, then open the cover while paying attention
to the nails and straps.
2. Remove the securing screws or the straps from the wooden base.
2.1.1 Examine the unit
1. Remove packing materials from the product.
Dispose of all packing materials in accordance with local regulations.
2. To determine whether any parts have been damaged or are missing, examine the
product.
3. If applicable, unfasten the product by removing any screws, bolts, or straps.
Use care around nails and straps.
4. If there is any issue, then contact a sales representative.
2.2 Transportation guidelines
Precautions
WARNING:
• Observe accident prevention regulations in force.
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
Check the gross weight that is indicated on the package in order to select proper lifting
equipment.
Position and fastening
Keep the pump / pump unit in the same position in which it was supplied from the factory.
Make sure that the pump or pump unit is securely fastened during transportation and
cannot roll or fall over.
WARNING:
• Do not use eyebolts screwed on the motor for handling the whole electric pump unit.
• Do not use the shaft end of the pump or of the motor to handle the pump, the motor
or the unit.
Eyebolts screwed onto the motor may be exclusively used to handle the individual motor
or, in case of a not balanced distribution of weights, to partially lift the unit vertically
starting from a horizontal displacement.
Pump unit must always be fixed and transported as shown.
2 Transportation and Storage
8 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

Pump without motor must be fixed and transported as shown.
2.3 Storage guidelines
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and
vibrations.
NOTICE:
Protect the product against humidity, heat sources, and mechanical damage.
NOTICE:
Do not place heavy weights on the packed product.
2.3.1 Long-term storage
If the unit is stored for more than 6 months, these requirements apply:
• Store in a covered and dry location.
• Store the unit free from heat, dirt, and vibrations.
• Rotate the shaft by hand several times at least every three months.
Refer to the drive unit and coupling manufacturers for their long-term storage
procedures.
For questions about possible long-term storage treatment services, please contact your
local sales and service representative.
2 Transportation and Storage
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 9

Ambient temperature
The product must be stored at an ambient temperature from 23°F to 104°F (-5°C to
+40°C).
2 Transportation and Storage
10 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

3 Product Description
3.1 General description
The pump is a high pressure multistage, radially split, segmented casing pump with the
first stage impeller specially designed for a low NPSHr value.
The pump can be used for handling:
• Cold or warm water
• Clean liquids
• Clean or aggressive fluids which are not chemically or mechanically aggressive to the
pump materials
The product can be supplied as a pump unit (pump and electric motor) or only as a pump.
NOTICE:
If you have purchased a pump without motor, make sure that the motor is suitable for
coupling to the pump.
Intended use
The pump is suitable for:
• Water supply and water treatment
• Cooling and hot water supply in industries and building services
• Irrigation and sprinkler systems
• Heating systems
• Snow making applications
•Nanofiltrations
• Boiler feed
Improper use
WARNING:
Improper use of the pump may create dangerous conditions and cause personal injury
and damage to property.
An improper use of the product leads to the loss of the warranty.
Examples of improper use:
• Liquids not compatible with the pump construction materials
• Hazardous liquids (such as toxic, explosive, flammable, or corrosive liquids)
• Potable liquids other than water (for example, wine or milk)
Examples of improper installation:
• Hazardous locations (such as explosive, or corrosive atmospheres).
• Location where the air temperature is very high or there is poor ventilation.
• Outdoor installations where there is no protection against rain or freezing
temperatures.
DANGER:
Do not use this pump to handle flammable and/or explosive liquids.
3 Product Description
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 11

NOTICE:
• Do not use this pump to handle liquids containing abrasive, solid, or fibrous
substances.
• Do not use the pump for flow rates beyond the specified flow rates on the data plate.
Special applications
Contact the local sales and service representative in the following cases:
• If the density and/or viscosity value of the pumped liquid exceeds the value of water,
such as water with glycol; as it may require a more powerful motor.
• If the pumped liquid is chemically treated (for example softened, deionized,
demineralized etc.).
• Any situation that is different from the ones that is described and relate to the nature of
the liquid.
3.2 Pump denomination
MP A 125 B - 02 A B R S - 0500 T T F 2 6B - N N N 4
20
191
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1. Pump type
2. Configuration
3. Pump size
4. Hydraulic design
5. Number of stages
6. Combination of full diameter and trimmed impellers
7. Flange orientation
8. ANSI suction flange class
9. ANSI discharge flange class
10.Motor hp
11.Motor enclosure
12.Frame size
13.Motor type
14.Number of poles
15.Motor frequency and voltage
16.Casing material
17.Impeller material
18.Diffuser material
19.Mechanical seal and o-ring material
20.Seal type
3.3 Nameplate
• The nameplate is located on the bearing frame.
• The nameplate lists key product specifications.
• The nameplate provides information regarding the materials of impeller, casing, and
mechanical seal.
3 Product Description
12 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

1. Pump model
2. Pump code
3. Rated flow
4. Rated head
5. Input power at rated conditions
6. Speed
7. Serial number, or order number + order position number
8. Full impeller diameter (only filled in for full impeller diameter)
9. Trimmed impeller diameter (only filled in for trimmed impellers)
10.Minimum operating liquid temperature
11.Maximum operating liquid temperature basis for MAWP
12.Maximum allowable working pressure
13.Pump efficiency at BEP (60 Hz)
14.Pump Energy Index
15.Bare Pump Weight
3.4 Pump design
• Suction casing: horizontal with radial flanges
• Discharge casing: horizontal with radial flanges
• Closed impeller
• Balance drum at discharge side incorporated in discharge casing
• Motors – standard design NEMA
• Flanges drilled according to ANSI B16.5, Class 150, 300 and 600
• Couplings: flexible without spacer as standard. Optional with spacer on customer
request
• Coupling guard: totally enclosed and position-adjustable
3.5 Material
The metallic parts of the pump that come in contact with water are made of the following:
3 Product Description
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 13

Item Material Code
CCC CBC CNC DCC DBC DNC NNN RNN RRR TTT
Impeller Cast Iron Bronze Stainless
Steel
Cast Iron Bronze Stainless
Steel
Stainless
Steel
Stainless
Steel
Duplex Super
Duplex
Diffuser Cast Iron Cast Iron Cast Iron
Casing Ductile
Iron
Ductile
Iron
Ductile
Iron
Duplex
Shaft Stainless Steel
Shaft
sleeve
Relief
pipe
Plain
bearing
Tungsten Carbide
3.6 Mechanical seal
• Standard mechanical seal according to EN12756 or
• Cartridge seal or
• Soft packing
3.7 Application limits
The following performance curves show the maximum allowable working pressure
depending on the pump model and the temperature of the pumped liquid.
Maximum working pressure
0
50
100
150
200
250
300
350
400
450
500
550
600
0 50 100 150 200 250 300
PSI
ºF
Class 300 - ASME B16.5
Class 150 - ASME B16.5
Figure 1: Cast Iron (JL 1040)
0
100
200
300
400
500
600
700
800
900
1000
0 50 100 150 200 250 300 350 400
PSI
ºF
Class 600 - ASME B16.5
Class 300 - ASME B16.5
Class 150 - ASME B16.5
Figure 2: Ductile Iron (JS 1030)
3 Product Description
14 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

0
50
100
150
200
250
300
350
400
450
500
550
600
650
0 50 100 150 200 250 300 350 400
PSI
ºF
Class 300 - ASME B16.5
Class 150 - ASME B16.5
Figure 3: Austenitic Stainless Steel (1.4408)
0
100
200
300
400
500
600
700
800
900
1000
0 50 100 150 200 250 300 350 400
PSI
ºF
Class 300 - ASME B16.5
Class 150 - ASME B16.5
Class 600 - ASME B16.5
Figure 4: Duplex (1.4517) & Super Duplex
(1.4469)
Liquid temperature intervals
The previous performance curves show the working temperature ranges.
For special requirements, contact the sales and service representative.
Maximum number of starts per hour
100.0
10.0
1.0 1 10 100 1000
XMotor power [kW]
Y Maximum permitted starts/h
Noise level
Table 1: Sound pressure levels for pump without motor
LpA [dB(A)]
P [hp] Speed [RPM]
2950 1450 3550 1750
3 57.2 56.2 57.4 56.5
4 58.6 57.7 58.9 58.0
3 Product Description
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 15

LpA [dB(A)]
P [hp] Speed [RPM]
2950 1450 3550 1750
5.5 60.0 59.1 60.2 59.3
7.5 61.5 60.5 61.7 60.8
10 62.9 62.0 63.2 62.3
15 64.8 63.8 65.0 64.1
20 66.2 65.3 66.5 65.6
25 67.2 66.3 67.5 66.6
30 68.1 67.1 68.3 67.4
40 69.5 68.6 69.8 68.9
50 70.5 69.6 70.8 69.9
60 71.5 70.5 71.7 70.8
75 72.4 71.4 72.6 71.7
100 73.8 72.9 74.1 73.2
125 74.8 73.8 75.0 74.1
150 75.7 74.7 75.9 75.0
180 76.5 75.6 76.7 75.8
220 77.4 76.5 77.6 76.7
270 78.5 77.6 78.7 77.8
340 79.5 78.6 79.8 78.8
430 80.6 80.9 79.9
480 81.2 81.4 80.5
540 81.8 82.0 81.1
610 82.4 82.6
680 82.8 83.1
760 83.4 83.6
860 83.9 84.2
980 84.5 84.7
1070 85.0 85.2
1210 85.7 85.9
1340 86.1 86.4
1500 86.6 86.8
1680 87.2 87.5
LpA Sound pressure level measured in a free field at one meter distance from the pump
P Pump power
3 Product Description
16 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL

4 Installation
Precautions
WARNING:
• Observe accident prevention regulations in force.
• Use suitable equipment and protection.
• Always refer to the local and/or national regulations, legislation, and codes in force
regarding the selection of the installation site, plumbing, and power connections.
Electrical Hazard:
• Make sure that all connections are performed by qualified installation technicians and
in compliance with the regulations in force.
• Before starting work on the unit, make sure that the unit and the control panel are
isolated from the power supply and cannot be energized. This applies to the control
circuit as well.
Grounding (earthing)
Electrical Hazard:
• Always connect the external protection conductor to ground (earth) terminal before
making other electrical connections.
• You must ground (earth) all electrical equipment. This applies to the pump equipment,
the driver, and any monitoring equipment. Test the ground (earth) lead to verify that it
is connected correctly.
• If the motor cable is jerked loose by mistake, the ground (earth) conductor should be
the last conductor to come loose from its terminal. Make sure that the ground (earth)
conductor is longer than the phase conductors. This applies to both ends of the motor
cable.
• Add additional protection against lethal shock. Install a high-sensitivity differential
switch (30 mA) [residual current device RCD].
4.1 Facility requirements
4.1.1 Pump location
DANGER:
Do not use this unit in environments that may contain flammable/explosive or chemically
aggressive gases or powders.
Guidelines
Observe the following guidelines regarding the location of the product:
• Make sure that no obstructions hinder the normal flow of the cooling air that is
delivered by the motor fan.
• Make sure that the installation area is protected from any fluid leaks, or flooding.
• If possible, place the pump slightly higher than the floor level.
• The ambient temperature must be between +32°F (0°C) and +104°F (+40°C).
• Contact the Sales and Service Department if:
– The room temperature exceeds +104°F (+40°C).
– The unit is located more than 3000 ft (1000 m) above the sea level. The motor
performance may need to be de-rated or replaced with a more powerful motor.
See Table 2.
4 Installation
e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL 17

Table 2:
H+32°F
(0°C)
+50°F
(+10°C)
+68°F
(+20°C)
+86°F
(+30°C)
+104°F
(+40°C)
+113°F
(+45°C)
+122°F
(+50°C)
+131°F
(+55°C)
+140°F
(+60°C)
m ft
0 0 1.00 1.00 1.00 1.00 1.00 0.95 0.90 0.85 0.80
500 1640 1.00 1.00 1.00 1.00 1.00 0.95 0.90 0.85 0.80
1000 3280 1.00 1.00 1.00 1.00 1.00 0.95 0.90 0.85 0.80
1500 4921 0.97 0.97 0.97 0.97 0.97 0.92 0.87 0.82 0.78
2000 6561 0.95 0.95 0.95 0.95 0.95 0.90 0.85 0.80 0.76
Pump positions and clearance
Provide adequate light and clearance around the pump. Make sure that it is easily
accessible for installation and maintenance operations.
Installation above liquid source (suction lift)
The theoretical maximum suction height of any pump is 33.9 ft (10.33 m). In practice, the
following affect the suction capacity of the pump:
• Temperature of the liquid
• Elevation above the sea level (in an open system)
• System pressure (in a closed system)
• Resistance of the pipes
• Own intrinsic flow resistance of the pump
• Height differences
The following equation is used to calculate the maximum height above the liquid level
which the pump can be installed:
hp + Hz ≥ (NPSHr + 2) +hf + hpv where:
hp(ft) is the absolute pressure that is applied to the free liquid surface in the suction tank;
Hz(ft) is the suction lift between the pump axis and the free liquid surface in the suction
tank; Hz is negative when the liquid level is lower than the pump axis;
hf(ft) is the flow resistance in the suction line and its accessories (fittings, foot valve, gate
valve, elbows, etc);
hpv (ft) is the vapor pressure of the liquid at the operating temperature; See Table 3.
2 (ft) is the minimum recommended safety margin.
Hpv
Hf
Hz
hp
˚F
Table 3:
T [°F] T [°C] hpv [ft]
60 15.6 0.6
80 26.7 1.2
100 37.8 2.2
120 48.9 3.9
140 60 6.7
4 Installation
18 e-MPA, e-MPR, e-MPD Horizontal Multistage Pump INSTRUCTION MANUAL