INOXPA DIN-FOOD Manual

INSTALLATION, SERVICE AND
MAINTENANCE INSTRUCTIONS
DIN-FOOD
INOXPA, S.A.
c/Telers, 54 Aptdo. 174
E-17820 Banyoles
Girona (Spain)
Tel. : (34) 972 - 57 52 00
Fax. : (34) 972 - 57 55 02
Email: [e-mail]
www.inoxpa.com
Original Manual
01.110.30.00EN
2021/11
(E)

4 1.Maintenance 2021/11
1. Safety
1.1. INSTRUCTIONS MANUAL
This manual contains information about the receipt, installation, operation, assembly, disassembly and maintenance of the DIN-
FOOD pump.
The information published in the instruction manual is based on updated information.
INOXPA reserves the right to modify this instruction manual without prior notice.
1.2. START-UP INSTRUCTIONS
This Instructions Manual contains essential and useful information for properly operating and maintaining your pump.
Read these instructions carefully before starting up the pump; become familiar with the operation and use of your pump and
follow the instructions closely. These instructions should be kept in a safe location near the installation.
1.3. SAFETY
1.3.1. Warning symbols
Danger for persons in general
Danger of injury caused by rotating
equipment parts
Electrical danger
Danger! Caustic or corrosive agents
Danger! Suspended loads
Danger to the correct operation of the
equipment
Commitment to safety at the workplace
Protective goggles requirement
1.4. GENERAL SAFETY INSTRUCTIONS
Read this Instructions Manual carefully before installing the pump and starting it up. Contact
INOXPA in case of doubt.
1.4.1. During installation
The Technical Specifications of Chapter 8 should always be observed.
Never start up the pump before it has been connected to the pipeline.
Do not start up the pump if the pump cover is not placed.
Check that the motor specifications meet the requirements, especially when working under
conditions that involve the risk of explosion.
During the installation, all the electric work should be carried out by authorised personnel.
1.4.2. During operation
The Technical Specifications of Chapter 8 should always be observed. Under no circumstances can the
limit values specified be exceeded.
NEVER touch the pump or the pipes during operation when the pump is being used to decant hot
fluids or when it is being cleaned.
The pump contains moving parts. Never place your fingers inside the pump while the pump is in
operation.

2021/11 1.Maintenance 5
NEVER operate the pump with the suction and delivery valves closed.
NEVER spray the electrical motor directly with water. The standard protection of the motor is
IP-55: Protection against dust and sprayed water.
1.4.3. During maintenance
The Technical Specifications of Chapter 8 should always be observed.
NEVER dismantle the pump before the pipes have been emptied. Remember that some of the fluid
will always remain in the pump housing (when no drainage is provided). Note that the pumped fluid
may be dangerous or very hot. Consult the regulations in effect in each country for these cases.
Do not leave parts loose on the floor.
ALWAYS disconnect the pump from the power supply before starting maintenance work. Remove the
fuses and disconnect the cables from the motor terminals.
All electrical work should be carried out by authorised personnel.
1.4.4. Compliance with the instructions
Any non-fulfilment of the instructions may result in a risk for the operators, the environment and the machine, and may result
in the loss of your right to claim damages.
This non-fulfilment may result in the following risks:
•Failure of important functions of the machines/plant.
•Failure of specific maintenance and repair procedures.
•Possibility of electric, mechanical and chemical risks.
•Will place the environment in danger due to the release of substances.
1.4.5. Guarantee
Any warranty provided shall immediately be cancelled and void ipso jure, and INOXPA shall be compensated for any product
liability claim from third parties, if:
•the service and maintenance work was not carried out in accordance with the service instructions, or the repair work has
not been carried out by our personnel or it has been conducted without our written authorization;
•our equipment has been changed without prior written authorization;
•the parts or lubricants used are not original INOXPA parts and products;
•the materials were used incorrectly or negligently, or not in accordance with these instructions and their intended use;
•pump parts were damaged by excessive pressure owing to the lack of a safety valve.
The General Delivery Terms already provided also apply.
No change can be made to the equipment without prior discussion with the manufacturer. For your
safety, please use original spare parts and accessories.
The use of other parts will exempt the manufacturer from any liability.
The service terms can only be changed with prior written authorisation from INOXPA.

6 2.Maintenance 2021/11
2. Table of Contents
1. Safety 4
1.1. Instructions manual....................................................................................................... 4
1.2. Start-up instructions...................................................................................................... 4
1.3. Safety .......................................................................................................................... 4
1.4. General safety instructions............................................................................................. 4
2. Table of Contents 6
3. Información General 7
3.1. Description ................................................................................................................... 7
3.2. Operating principle........................................................................................................ 7
3.3. Application ................................................................................................................... 7
4. Installation 9
4.1. Pump reception............................................................................................................. 9
4.2. Transport and storage ................................................................................................... 9
4.3. Location ......................................................................................................................10
4.4. Coupling......................................................................................................................10
4.5. Pipes...........................................................................................................................11
4.6. Pressurisation tank.......................................................................................................11
4.7. Electrical installation.....................................................................................................11
5. Start-up 13
5.1. Start-up ......................................................................................................................13
6. Operating Problems 14
7. Maintenance 15
7.1. General information......................................................................................................15
7.2. Tightening torque ........................................................................................................15
7.3. Lubrication ..................................................................................................................15
7.4. Storage .......................................................................................................................15
7.5. Cleaning......................................................................................................................16
7.6. Disassembly / assembly of the pump .............................................................................17
8. Technical Specifications 25
8.1. Technical specifications.................................................................................................25
8.2. Weights.......................................................................................................................25
8.3. DIN-FOOD dimensions (bare shaft)................................................................................26
8.4. DIN-FOOD dimensions (bare shaft with baseplate)..........................................................27
8.5. DIN-FOOD dimensions (close-coupled)...........................................................................28
8.6. DIN-FOOD dimensions (shrouded close-coupled) ............................................................29
8.7. DIN-FOOD pump (bare shaft)........................................................................................30
8.8. DIN-FOOD pump (close-coupled)...................................................................................31
8.9. DIN-FOOD pump (bare shaft) cross-section....................................................................32
8.10. DIN-FOOD (bare shaft) parts list..................................................................................33
8.11. DIN-FOOD pump (close-coupled) cross-section .............................................................34
8.12. DIN-FOOD (close-coupled) parts list.............................................................................35
8.13. DIN-FOOD Flushed mechanical seal (bare shaft) ...........................................................36
8.14. DIN-FOOD flushed mechanical seal (close-coupled, size 160 and 180 motors) .................37
8.15. DIN-FOOD flushed mechanical seal (close-coupled, size 200 motors) ..............................38
8.16. DIN-FOOD double mechanical seal (bare shaft).............................................................39

2021/11 3.Maintenance 7
3. Información General
3.1. DESCRIPTION
INOXPA DIN-FOOD series centrifugal pumps are manufactured with a cold-stamped thicknplate and volute body. The parts in
contact with the product are manufactures in AISI 316L stainless steel, internal finish is n Ra 0.8.
The DIN-FOOD centrifugal pump is built with a bare shaft or close-coupled construction with a shrouded motor, axial suction
and radial discharge, connections with DIN-11864-2-B flanges. The impeller is of a half-open design with double curvature and
manufactured in a single piece. The mechanical seal is balanced and completely sanitary; the springs are protected to prevent
contact with the product. The material of the wear surfaces is silicon carbide and graphite, with EPDM gaskets in the standard
version.
The motor complies with IEC standards, IP-55 protection, F-class insulation. Three-phase power 220-240 / 380-420 V or 380-
420 / 660 V at 50 Hz, depending on power supply. On demand, motors suitable for operating in explosive environments can be
provided. Depending on the environmental conditions, the motors can be flameproof (EExd) or enhanced-safety (EExe) motors.
The DIN-FOOD series model was developed specifically to meet all hygienic requirements required by the food industry.
In terms of hygiene, reliability and durability, the entire range meets all the requirements imposed by the aforementioned
industries. Its design enables the highest level of interchangeability of parts.
This equipment is suitable for use in the food-processing industry.
3.2. OPERATING PRINCIPLE
Housed inside the casing, the impeller rotates in conjunction with the pump shaft and it is comprised of varying number of
blades, depending on the pump model.
With this arrangement, the impeller blades convey energy to the fluid in the form of kinetic energy and pressure energy.
This pump is not reversible by simple reversal of the direction of rotation. The direction of rotation is clockwise when the pump
is viewed from the rear side of the motor.
3.3. APPLICATION
As a general rule, standard version DIN-FOOD pumps are mainly used in the food-processing industries for transferring fluids.
Various impeller diameters and speeds of the hydraulic specifications are provided for each pump type. The characteristics
charts also show the required absorbed power and NPSH.
3.3.1. Range of application

8 3.Maintenance 2021/11
Each pump has performance limits. The pump was selected for certain pumping conditions at the
time the order was placed. INOXPA shall not be liable for any damage resulting from the
incompleteness of the information provided by the purchaser (nature of the fluid, rpm, etc.).

2021/11 4.Maintenance 9
4. Installation
4.1. PUMP RECEPTION
INOXPA cannot be held responsible for the damage sustained by the equipment during transport or
unpacking. Visually check that the packaging is not damaged.
The pump will be accompanied by the following documents:
•Dispatch notes.
•Pump Instructions and Service Manual.7
•Motor Instructions and Service Manual (*)
(*) when the pump is supplied with a motor by INOXPA.
Unpack the pump and check the following:
•The pump suction and delivery connections, remove the
remains of any packaging materials.
•Check that the pump and the motor have not suffered any
damage.
•If the equipment is not in good condition and/or any part is
missing, the carrier should draw up a report accordingly as
soon as possible.
4.1.1. Pump identification
Pump plate
4.2. TRANSPORT AND STORAGE
DIN-FOOD pumps are often too heavy to be handled and stored manually.
Lift the pump as shown below:
Serial number

10 4.Maintenance 2021/11
4.3. LOCATION
Place the pump as close as possible to the suction tank, and if possible below the product level.
Place the pump so as to allow sufficient space around it to access the pump and the motor. (See Chapter 8 Technical
Specifications for dimensions and weight).
Set up the pump on a flat, level surface.
The foundation must be rigid, horizontal, flat and vibration-proof.
Install the pump so as to allow sufficient ventilation.
If the pump is installed outdoors, it should be protected by a roof. Its location should enable easy
access for any inspection or maintenance operations.
4.4. COUPLING
For the selection and fitting of couplings, please refer to the supplier’s manual. In some cases, the starting torque of positive-
displacement pumps can be quite high. Therefore, the chosen coupling should be 1.5 to 2 times the recommended torque.
Alignment
The shafts of the pump unit and the pump transmission are aligned correctly when assembled at our factory.
Check the alignment of the pump unit after installation.
Place a straight-edge ruler (A) on the coupling: the ruler must be in contact with both halves of the coupling over its entire
length. See illustration.
Repeat the check, this time on both sides of the coupling, close to the shaft. For the sake of accuracy, this check should also be
performed using an outside calliper (B) on two diametrically opposed points on the exterior surfaces of the two halves of the
coupling.
Maximum alignment deviations:
Exterior diameter
of the coupling
(mm)
Minimum Va.
[mm]
Maximum Va.
[mm]
Max. Va. - Min. Va.
[mm]
Var.
[mm]
70 - 80
2
4
0,13
0,13
81 - 95
2
4
0,15
0,15
96 - 110
2
4
0,18
0,18
111 - 130
2
4
0,21
0,21
131 - 140
2
4
0,24
0,24
141 - 160
2
6
0,27
0,27
161 - 180
2
6
0,3
0,3
181 - 200
2
6
0,34
0,34
201 - 225
2
6
0,38
0,38

2021/11 4.Maintenance 11
4.5. PIPES
•As a general rule, the suction and delivery pipes should be fitted in straight sections, with the least possible number of
bends and fittings, in order to minimise pressure loss caused by friction.
•Ensure that pump inlet and outlet fittings are properly aligned with the piping and of a similar diameter to the pump
connections.
•Place the pump as close as possible to the suction tank, if possible below the fluid level, or even below the tank, to achieve
the maximum static suction head.
•Place pipe supports as close as possible to the pump suction inlet and delivery outlet.
4.5.1. Shut-off valves
The pump can be isolated for maintenance purposes. Shut-off valves should be fitted to the pump suction and delivery
connections.
These valves should ALWAYS be open when the pump is operating.
4.6. PRESSURISATION TANK
For models with a double mechanical seal, a pressurisation tank must be installed.
Figure 4.6.1: Pressurisation tank installation diagram
For more information on the pressurisation tank (installation, operation, maintenance, etc.), see the manufacturer’s instructions
manual.
4.7. ELECTRICAL INSTALLATION
The connection of the electrical motors must be performed by qualified personnel.
Take all necessary measures to prevent damage to connections and cables.
The electrical equipment, terminals and components of the control systems may still contain electric
current when switched off. Contact with them may be dangerous for operators or cause irreversible
damage to the equipment.
Before opening the pump, make sure that the electrical circuit is switched off.
Mechanical seal
1...2m
ALWAYS install a pressurisation tank 1 to 2 meters above the pump shaft. See Figure 4.6.1.
ALWAYS connect the cooling fluid inlet to the lower connection of the seal chamber. Therefore, the
outflow of the cooling liquid will be through the upper connection of the chamber. See Figure 4.6.1.

12 4.Maintenance 2021/11
•Connect the motor following the manufacturer’s instructions.
•Check the direction of rotation (see the label on the pump).
Start up the pump motor briefly. Make sure, by looking at
the pump from the rear, that the motor fan is rotating in a clockwise direction.
ALWAYS check the direction of rotation of motor with fluid inside de pump.
For models with a seal chamber, ALWAYS make sure that the chamber is full of liquid before
checking the rotation direction.

2021/11 5.Maintenance 13
5. Start-up
Before starting the pump, thoroughly read the instructions provided in Chapter 4. Installation .
5.1. START-UP
Read Chapter 8 Technical Specification thoroughly . INOXPA cannot be held responsible for the
incorrect use of the equipment.
NEVER touch the pump or the pipes when hot fluid is being pumped.
5.1.1. Checks before starting up the pump
•Fully open the shut-off valves on the suction and delivery pipes.
•Check the pump oil level. Fill with the necessary amount of oil so that the level is in the centre of the sight glass (If starting
up for the first time: pumps are delivered with oil in the box. However, it is important to always remember to conduct this
check).
•If the fluid does not flow into the pump, prime the pump with fluid to be pumped.
The pump must NEVER be run dry.
•Check that the motor direction of rotation is correct.
5.1.2. Checks when starting up the pump
•Check that the pump is not making any unusual noises.
•Check that the absolute inlet pressure is high enough to avoid cavitation in the pump. See the curve to determine the
minimum pressure required above steam pressure (NPSHr).
•Check the flow pressure.
•Check that there are no leaks through the sealed areas.
A shut-off valve on the suction pipe must not be used to regulate flow. Shut-off valves must be fully
open during operation.
Check the motor power consumption to avoid electric overload.
Reduce the flow and the power consumed
by the motor:
•Regulating the flow to the pump delivery.
•Decreasing motor speed.

14 6.Maintenance 2021/11
6. Operating Problems
The following table provides solutions to problems that might arise during pump operation. The pump is assumed to have been
properly installed and correctly selected for the application.
Please contact INOXPA if technical assistance is required.
Operating Problems
Probable causes
Motor overload
8, 9, 13, 14, 20, 21, 22, 23, 24.
The pump does not provide enough flow or pressure
1, 2, 4, 5, 7, 9, 10, 17, 19.
No pressure on the delivery side
2, 3, 6, 18.
Uneven delivery flow / pressure
1, 2, 4, 5, 6, 9.
Noise and vibration
2, 4, 5, 6, 7, 8, 9, 10, 13, 14,15, 20, 21, 22, 23, 24.
The pump gets clogged
9, 10, 13, 14, 15, 20, 21, 22, 24.
Overheated pump
8, 9, 10, 13, 14, 15, 20, 21, 22, 23, 24.
Abnormal wear
4, 5, 10, 14, 15, 20, 24.
The mechanical seal is leaking.
11, 12, 16.
Probable causes
Solutions
1
Wrong direction of rotation
Reverse the direction of rotation.
2
NPSH is not high enough
Increase the available NPSH:
- Place the suction tank higher
- Place the pump lower
- Reduce steam pressure
- Increase the diameter of the suction pipe
- Shorten and simplify the suction pipe
3
Pump not drained
Drain or fill
4
Cavitation
Increase suction pressure (see also 2)
5
Air is sucked in by the pump.
Check the suction pipe and all its connections
6
Clogged suction tube
Check the suction pipe and all its filters, if any
7
Delivery pressure too high
If necessary, reduce pressure losses, e.g. by increasing the
diameter of the tube
8
Flow too high
Decrease the flow:
- Reduce the flow by means of a diaphragm.
- Partially shut off the delivery valve.
- Trim impeller.
- Reduce speed.
9
Fluid viscosity too high
Reduce the viscosity, e.g. by heating the fluid
10
Fluid temperature too high
Reduce the temperature by cooling the fluid.
11
Mechanical seal damaged or worn.
Replace the seal
12
O-rings unsuitable for the fluid.
Fit suitable O-rings after checking with the supplier.
13
The impeller scrapes.
- Reduce temperature
- Reduce suction pressure
- Adjust impeller / cover clearance.
14
Taught tubes
Connect the tubing to the pump avoiding taughtness.
15
Foreign particles in the fluid
Fit a filter to the suction tube
16
The mechanical seal spring tension is too low
Adjust as indicated in this Manual
17
Pump speed too low
Increase speed.
18
The cut-off valve on the suction side is closed
Check and open
19
Delivery pressure too low
Increase pressure:
- Increase impeller diameter.
-Increase the pump speed.
20
Bearings are worn.
Replace bearings; service the pump
21
Insufficient lubricating oil
Refill with lubricating oil
22
Unsuitable lubricating oil
Use suitable lubricating oil
23
Misaligned coupling
Align the coupling
24
Pump and/or motor not attached to the bedplate.
Attach the pump and/or motor and check that the tubes are
connected without taughtness and align the coupling
If the problems persist, stop using the pump immediately. Contact the pump manufacturer or their
representative.

2021/11 7.Maintenance 15
7. Maintenance
7.1. GENERAL INFORMATION
Like any other machine, this pump requires maintenance. The instructions contained in this manual cover the identification and
replacement of spare parts. The instructions have been prepared for maintenance personnel and for those responsible for the
supply of spare parts.
Please read Chapter 8 Technical Specification.
All replaced material should be duly eliminated/recycled according to the directives in effect in the
area.
ALWAYS disconnect the pump from the power supply before undertaking maintenance work.
7.1.1. Checking the mechanical seal
Regularly check that there are no leaks in the shaft area. If there are leaks through the mechanical seal, replace it following the
instructions given in the Assembly and Dismantling section.
7.2. TIGHTENING TORQUE
Material
Torque value [N.m.]
M5
M6
M8
M10
M12
M14
M16
M18
M20
8.8
6
10
25
49
86
135
210
290
410
A2
5
9
21
42
74
112
160
210
300
7.3. LUBRICATION
The bearings are lubricated by means of an oil bath.
The pumps are supplied with oil.
•Check the oil level regularly, e.g. weekly or after every 150 hours of service.
•The first oil change should be conducted after 150 hours of service.
•Following this, the oil should be changed after every 2,500 hours of service or at least once a year under normal operating
conditions.
When the oil is changed. the oil box should be filled up to the level in the centre of the sight-glass.
Do not overfill the support with oil.
Leave the pump in the stop position for a while and then check the oil level; if necessary, add a little more oil.
Oil for ambient temperatures of 5 to 50°C: ISO VG 68.
PUMP TYPE
Support oil
capacity [l.]
125-100-250
125-100-315
125-100-400
150-125-250
150-125-315
150-125-400
200-150-250
1,75
200-150-315
200-150-400
2
7.4. STORAGE
The pump must be completely emptied of fluid before storage. If possible, avoid exposing the components of the pump to
excessively damp environments.

16 7.Maintenance 2021/11
7.5. CLEANING
The use of aggressive cleaning products such as caustic soda and nitric acid may cause burns to the
skin.
Use rubber gloves during the cleaning process.
Always use protective goggles.
7.5.1. CIP process
If the pump is installed in a system with a CIP process, it is not necessary to dismantle the pump.
If there is no automatic cleaning process, dismantle the pump as indicated in the Assembly and Dismantling section.
Cleaning solutions for CIP processes.
Only use clear water (chlorine-free) to mix with the cleaning agents:
a) Alkaline solution: 1% by weight of caustic soda (NaOH) at 70ºC (150ºF)
1 Kg NaOH + 100 l. of water = cleaning solution
o
2.2 l. NaOH at 33% + 100 l. of water = cleaning solution
b) Acid solution: 0.5% by weight of nitric acid (HNO3) at 70ºC (150ºF)
0.7 litres HNO3at 53% + 100 l. of water = cleaning
Check the concentration of the cleaning solutions to avoid damaging the pump seals.
To remove any remains of cleaning products, ALWAYS perform a final rinse with clean water on completion of the cleaning
process.
7.5.2. Automatic SIP
The steam sterilisation process is applied to all equipment including the pump.
DO NOT operate the equipment during the steam sterilisation process.
The parts/materials will not suffer damage provided the instructions set out in this manual are
followed.
Cold liquid cannot be introduced until the pump temperature is below 60oC (140oF).
The pump generates a substantial pressure loss through the sterilisation process; we recommend the
use of a bypass circuit provided with a discharge valve to ensure that the steam / overheated water
sterilises the entire circuit.
Maximum conditions during the steam or overheated water SIP process
a) Max. temperature: 140°C / 284°F
b) Max. time: 30 min.
c) Cooling: Sterilised air or inert gas
d) Materials: EPDM / PTFE (recommended)
FPM / NBR (not recommended)

2021/11 7.Maintenance 17
7.6. DISASSEMBLY / ASSEMBLY OF THE PUMP
7.6.1. Pump and impeller body
Disassembly
Remove the hexagonal screws (52) and washers (53) fixing the housing (01) to the lantern (04). Remove the blind nut (45)
and O-ring (80D), then take out the impeller (02).
Assembly
Slide the impeller (02) over the shaft (05) until making contact with the spacer (17), attach the O-ring (80D) in the slot of the
blind nut (45) and tighten the nut (45). Attach the housing (01) and fix it to the lantern (04) with hexagonal screws (52) and
washers (53).

18 7.Maintenance 2021/11
7.6.2. Single mechanical seal
Disassembly
Remove the rotary part of the mechanical seal (08).
Remove the screws (52E) fixing the cover (03) with the lantern (04).
Remove the pump cover (03), the fixed part of the mechanical seal (08A) will remain housed inside the cap.
Remove the fixed part of the mechanical seal (08).
Assembly
Check the location of the shaft (05) in relation to the pump cover (03). See section 7.6.8. Adjusting the pump shaft.
Attach the pump cover (03) to the lantern (04) and fasten with the screws (52E).
Place the fixed part of the mechanical seal in the cover housing (03) taking the knob into account.
Check that assembly measure used is that which is described below:
Slide the rotating part of the mechanical seal (08) over the shaft
(05) till the end.
Ø D
A
51
34,5
58
37,5
CAUTION! When placing the new seal, assemble the parts and seals using
soapy water to ensure that they slide over each other, including the
stationary part and the rotary part of the shaft.

2021/11 7.Maintenance 19
7.6.3. Flushed mechanical seal (bare shaft)
Disassembly
Remove the rotary part of the mechanical seal (08).
Remove the screws (52E) fixing the cover (03) with the lantern (04).
Remove the pump cover (03) with the cap (10) and seal ring (30) still mounted. The fixed parts of the mechanical seals (08)
and (08B) remain housed in the group.
Remove the fixed part of the mechanical seal (08).
Remove the screws (52C) and detach the seal ring (30), the fixed part of the external mechanical seal (08B), the cap (10), and
the O-ring (80B).
Loosen the pins (55A) and extract the rotary part of the external mechanical seal (08A) with the sleeve (13).
Assembly
Check the location of the shaft (05) in relation to the pump cover (03). See section 7.6.8. Adjusting the pump shaft.
Attach the rotary part of the external mechanical seal (08A) with the gasket and spring on the sleeve (13) and fix the shaft
using the pins (55A).
Place the O-ring (80B) over the pump cover alignment (03).
Place the cap (10), the fixed part of the external mechanical seal (08B), and the seal ring (30), and fasten it all onto the pump
cover (03) using the screws (52C).
Carefully attach the entire assembly to the lantern (04) and fasten with the screws (52E). At the same time, both working
surfaces of the external mechanical seal (08A, 08B) will make contact with each other.
In order to fit the internal mechanical seal, see the section on assembling the simple mechanical seal.
CAUTION! When placing the new seal, assemble the parts and seals using
soapy water to ensure that these slide over each other, including the
stationary part and the rotary part of the shaft.

20 7.Maintenance 2021/11
7.6.4. Flushed mechanical seal (close-coupled, size 160 and 180 motors)
Disassembly
Remove the rotary part of the mechanical seal (08).
Remove the screws (52E) fixing the cover (03) with the lantern (04).
Remove the pump cover (03) with the cap (10) and seal ring (30) still mounted. The fixed parts of the mechanical seals (08)
and (08B) remain housed in the group.
Remove the fixed part of the mechanical seal (08).
Remove the screws (52C) and detach the seal ring (30), the fixed part of the external mechanical seal (08B), the cap (10), and
the O-ring (80B).
Remove the pins (55A) and extract the rotary part of the external mechanical seal (08A) with the gasket and spring.
Assembly
Check the location of the shaft (05A) in relation to the pump cover (03). See section 7.6.8. Adjusting the pump shaft.
Attach the rotary part of the external mechanical seal (08A) with the gasket and spring on the shaft (05A) and fasten using the
pins (55A).
Place the O-ring (80B) over the pump cover alignment (03).
Place the cap (10), the fixed part of the external mechanical seal (08B), and the seal ring (30), and fasten it all onto the pump
cover (03) using the screws (52C).
Carefully attach the entire assembly to the lantern (04) and fasten with the screws (52E). At the same time, both working
surfaces of the external mechanical seal (08A, 08B) will make contact with each other.
In order to fit the internal mechanical seal, see the section on assembling the simple mechanical seal.
-
CAUTION! When placing the new seal, assemble the parts and seals using
soapy water to ensure that these slide over each other, including the
stationary part and the rotary part of the shaft.