Packo HP Series User manual

Hygienic rotary lobe pumps

2
CONTENTS
1
INTRODUCTION
1.1
General Information
3
1.2
Manufacturer
3
1.3
Copyright
3
1.4
Declaration of conformity
4
1.5
Principle of operation
5
1.6
Intended Use
5
1.7
Type designation
5
1.8
Sound pressure level
6
2
SAFETY
7
3
INSTALLATION
3.1
Unpacking and lifting of the pump
8
3.2
Operating limitations
8
3.3
Location & orientation
8
3.4
Drives
11
3.5
Baseplate
11
3.6
Guards and safety
11
3.7
Electrical connection of the motor
12
3.8
Ports and pipework
13
3.9
Enlarged rectangular inlet
13
3.10
Temperature control jackets
13
3.11
Seals and flushing
14
3.12
Seal materials
17
3.13
End cover relief valve
17
3.14
Lubrication
18
4
START UP & ROUTINE CHECKS
4.1
Start up
19
4.2
Daily checks
19
4.3
Weekly checks
20
4.4
Monthly checks
20
4.5
Six monthly checks
20
4.6
Annual checks
20
5
CLEANING AND STERILISATION
5.1
Cleaning in place (CIP) & manual cleaning
21
5.2
Sterilizing in place (SIP)
22
6
INSPECTION AND REPAIR
6.1
End cover
23
6.2
Rotors
23
6.3
Primary seals
24
6.4
Mechanical shaft seals –single flushed
27
6.5
Secondary mechanical seals –double
28
6.6
Seal housings
29
6.7
Rotor case
29
6.8
Rotor clearance –checking and adjustment
30
6.9
End cover relief valve
32
6.10
Thermal jacket –end cover
33
6.11
Thermal jacket –pump head
33
6.12
Bearing housing –inspection & repair
33
6.13
Gearbox shafts, gears and bearings
34
6.14
Bearing set-up and preload
34
7
ATEX APPLICATIONS
36
8
EXPLODED DIAGRAMS
8.1
HP & LH exploded diagram
38
8.2
HP 3 size exploded diagram
39
8.3
Options & Extras –sectional views
40

3
1 INTRODUCTION
1.1 GENERAL INFORMATION
Thank you for purchasing PACKO products!
This manual for the HP & LH series Rotary Lobe
Pumps describes safe and appropriate installation,
use, disassembly and assembly, maintenance and
troubleshooting of the pump.
Read and completely understand this manual to
learn how to service these pumps prior to
operating or servicing the product and observe to
pay special attention to the warnings.
This manual must always be available at the
installation location since no liability will be
assumed for any damage or operational
malfunctions arising from non-compliance with
these operating instructions.
1.2 MANUFACTURER
JEC LTD
15-26, Beodeul-ro 1362, Paltan-myeon,
Hwaseong-si,
Gyeonggi-do, 18578, Rep. of Korea
Telephone: [phone]
Telefax: + 82 31 355 0319
E-mail: export[email protected]r.com
1.3 COPYRIGHT
These operating instructions are written to
support the installation, the use and the
maintenance of the pump in accordance with the
European machinery directive. They are originally
written in Dutch, English, French and German by
the manufacturer. All other languages are
translations of the original operating instructions.
PACKO INOX LTD has the copyright on this
document. These operating instructions may be
reproduced in full in the operating instructions of
the machine or installation in which the pump is
installed and may be used for training personnel
who must work on or with the pump. Any other
publication, reproduction in full or parts thereof is
prohibited.
Although these operating instructions have been
carefully drawn up, they do not however cover all
possible eventualities that can occur during the
installation, operation or the maintenance of the
pump. In any event, the pump must not be used
for purposes other than those stated when
ordering and for which the pump has been
constructed, as this could result in physical
damage and injuries.

4
1.4 DECLARATION OF CONFORMITY
Declaration of conformity according to annex IIA of the “Machinery”
Directive 2006/42 EC
We,
JEC LTD
15-26, Beodeul-ro 1362, Paltan-myeon, Hwaseong-si,
Gyeonggi-do, 18578, Rep. of Korea
confirm that the Packo pump type ……................................, with serial number ....................................
fully complies with the Directive Machinery and with the (harmonised) standard EN 809, ENISO12100.
It must be brought to your attention that our product is intended to be built into a machine, and that,
on the basis of the “Machinery” Directive, the complete (compound) machine can only be applied after
matching the stipulations of the European demands.
JEC LTD 15-26, Beodeul-ro 1362, Paltan-myeon, Hwaseong-si, Gyeonggi-do, 18578, Rep. of Korea is
authorized to make up the technical construction file.
Date
.............................
Signature:
.............................................................................................................................
JEC Ltd

5
1.5 PRINCIPLE OF OPERATION
HP & LH pumps have 2 rotors which turn in
opposite directions. Fluid enters the pump from
the inlet port and fills the space between the
rotors. This fluid is carried around the outside of
the rotors and is forced out of the discharge port
as the rotor lobes mesh together see Figure 1.
Each rotor is supported on a shaft and when the
pump is running within its operating limits, the
rotors never touch the inside of the rotor case, or
each other.
Figure 1 - Principle of operation (Showing vertical
mounting)
1.6 INTENDED USE
The pump should only be used for pumping the
media it was selected for and within the limits
specified in the technical datasheets. Any other
application beyond the intended use or
conversion of the pump without written
agreement with the manufacturer shall be
deemed to be not in accordance with the
intended use.
The pump may only be started up for the first
time if it has been ensured that all safety devices
are completely fitted and functional.
If any areas are subject to have the risk of
explosion, the relevant explosion-proof designed
pumps should be used.
Intended use also covers compliance with the
conditions of operation, servicing and
maintenance specified by the manufacturer.
The pump is only to be put into operation filled
with medium to be pumped.
Before starting up pay attention to:
- Open the valves on the suction side completely
to avoid cavitation and,
- Open the valves on the discharge side
completely to avoid exceeding the permitted
differential pressure of the pump
- Discharge-side safety measures should be done
(e.g. safety valve) to protect the pump from non-
permitted excess pressure
- Protection against contact for hot, cold and
moving parts must not be removed during
operation
1.7 TYPE DESIGNATION
The type designation can be found on the pump
name plate and also on both the order
confirmation and customer invoice.
Example (an X in the code denotes a special
version):
Type: HP/44-213/114
HP: pump series
44: pump type
213: Speed of the pump when the motor
operates at 50Hz
11: motor power in kW multiplied by ten (11 =
1.1 kW)

6
4: number of poles of the motor
Mat. Code: (TLHP-95) D37SSVQ
TLHP: Rotor code (TLHE = tri-lobe high
efficiency, TLHP = tri-lobe high pressure,
SCHE = scimitar high efficiency, SCHP =
scimitar high pressure)
95: temperature class of the pump (Deg. C)
D: type of couplings (D = DIN 11851, B = BSP,
E = DIN 2642, F = DIN 2576, R = RJT, S =
SMS, I = IDF, T = Tri-Clamp ISO2852, M =
Tri-clamp ASME BPE, O = Tri-clamp ISO, N =
ANSI flanges, V = DIN 11864-1, A = DIN
11864-2)
37: housing size of the NORD reductor
S: seal configuration (S = standard single seal,
Q = quench, D= double mechanical seal)
S: mechanical shaft seal materials (S = silicon
carbide / silicon carbide, I = carbon / stainless
steel, K = carbon / silicon carbide)
V: elastomer materials (E = EPDM, V = viton,
M = teflon, P = NBR)
Q: options (T = pump and motor reductor on
trolley, U = pump and motor reductor on
trolley with cover, P = bare shaft pump, Q =
pump and motor reductor aligned on base
plate, R = pump and motor reductor aligned
on base plate with cover, J = on pedestal
without foot)
Moreover, the year and week of construction, the
pump serial number (to be stated when ordering
spare parts), the weight, maximum operating
temperature and maximum differential pressure
are also marked on the name plate.
1.8 SOUND PRESSURE LEVEL
The sound-pressure level of the pump, operating
at 50Hz without cavitation measured at 1m is less
than 70dB(A). In order to minimize noise and
vibration, no other parts of the machine may
vibrate at the same time as the pump. The best
solution is therefore to allow the pump to rest
directly on the concrete floor, or to fit shock
absorbers between the pump and the frame of
the machine.

7
2 SAFETY
Throughout this manual your attention is drawn
to certain procedures which must be followed to
ensure safe operation and servicing of this
product.
ATTENTION
Do not ignore safety instructions.
ATTENTION
Do not remove by-pass or tamper with safety
devices.
ATTENTION
Do not use this equipment if the end cover (122)
is removed, guards are missing or inlet & outlet
pipework is not connected.
ATTENTION
Do not forget the hazards of moving parts, high
fluid pressure, extremes of temperature,
hazardous, liquids, electricity.
Always isolate and lock-out the pump drive motor
before inspecting or servicing pump.
ATTENTION
Heavy lifting and work only to be done by suitably
trained personnel.

8
3INSTALLATION
Careful attention to correct installation of HP & LH
pumps, and recognition of certain limitations to
the operating conditions of the pump, will ensure
long life and trouble-free running.
ATTENTION
Failure to follow these instructions could result in
personal injury or loss of life.
Take particular care over the following:
3.1 UNPACKING AND LIFTING
OF THE PUMP
Unpack the pump/unit upon delivery and inspect
it for visible transport damage.
Any damage occurred during the transporting has
to be immediately reported to the transport agent
after receipt of the consignment. Do not put the
damaged products into operation.
The pumps need to be transported and secured
with care to ensure no damage is caused. Smaller
pumps without motor weigh less than 20kg and
can be lifted by hand. Larger pumps with lifting
eye bolt and complete units should be lifted as
shown on the below pictures. Straps with
sufficient load capacity must be used.
Make sure you set the pump down on a stable
horizontal surface.
3.2 OPERATING LIMITATIONS
PRIMING: HP & LH pumps are not truly self-
priming and should be installed in a “flooded inlet”
pipe arrangement i.e. with the pump lower than
the level of liquid to be pumped and with the
supply pipe falling continuously to the pump with
no loops.
PRESSURE: Do not operate the pump above the
maximum differential pressure shown on the
nameplate, not even for a few seconds, as
damage to the pump components will result,
leading to metal particles in the pumped fluid,
ineffective cleaning and possibly complete pump
seizure.
ATTENTION
Never run the pump against a closed valve. Note
that the pressure limit varies with the
temperature.
SOLIDS: HP & LH pumps can handle soft solids
in suspension but will be damaged by hard
particles. Take care when pumping solids, crystals,
etc.
Never allow metal parts to enter the pump, i.e.
weld metal, screws, tools, etc. as these will stop
the pump, leading to damaged rotors, rotor case
and shafts.
CAVITATION: The pumps cannot operate
without sufficient pressure of liquid at the inlet
port of the pump. Normally atmospheric pressure
is sufficient but the actual pressure needed, is
higher for:
•High Viscosities
•High Temperature
•High Pump Speeds
•Volatile Liquids
Insufficient inlet pressure will cause the pump to
cavitate leading to low performance, noise and
short pump life. Ensure inlet pipes are short,
large bore and do not collapse under vacuum.
3.3 LOCATION & ORIENTATION
The pump should be located:
•As close as possible to the fluid source
and as low as possible to maximize the
net inlet pressure available to the pump.

9
•In a clear area allowing access all around
pump and drive for easy servicing.
•With space above for lifting equipment
required.
•With port axis vertical if pump is required
to be self-draining.
All HP & LH pumps are equally suitable for both
directions of rotation.
HP & LH pumps can be rotated to give horizontal
port orientation with top or bottom input shaft
positions or vertical port orientation with left or
right input shaft positions.
See Figure 2, Figure 3, Figure 4, Figure 5, &
Figure 6.
This is achieved with the bolt-on feet and re-
positional gear cover. (Ensure gearbox is drained
of oil prior to gear cover removal)
To change any pump from vertical to horizontal
pipework or vice versa, the correct foot kit needs
to be applied. Foot kits contain all components
required to change orientation.
See below for orientation setup after the packing
feet have been removed.
To orientate the pump for:
Horizontal Ports Top Shaft Drive
Figure 2 - Horizontal ports top shaft drive
•Remove black hole covers from foot
location recess and place in a safe location
(33 & 34)
•Push foot dowel pin (32) (Supplied in foot
kit) into the un-tapped hole in the bottom
foot location recess.
•Mate dowel pin in bottom foot location
recess into dowel pin hole in horizontal
foot (22).
•Push foot home until foot face mates with
foot location recess face.
•Fit foot bolts (21) (Supplied in foot kit)
through the feet into the bearing housing
(1) and tighten to torque specified in
Table 1.
•Repeat process for 2nd foot.
•Refit black hole covers into top foot
location recesses.
Horizontal Ports Bottom Shaft Drive
Figure 3 - Horizontal ports bottom shaft drive
•Remove the black hole covers from the
foot location recess and place in a safe
location (33 & 34)
•Push the foot dowel pin (32) (Supplied in
the foot kit) into the un-tapped hole in the
top foot location recess.
•Mate the dowel pin in the top foot location
recess into the dowel pin hole in the
horizontal foot (22).
•Push the foot home until the foot face
mates with the foot location recess face.
•Fit the foot bolts (21) (Supplied in the foot
kit) through the feet into the bearing
housing (1) and tighten to the torque
specified in Table 1.
•Repeat the process for the 2nd foot.
•Refit the black hole covers into the top
foot location recesses.
•Remove the key (29) from the drive shaft
end.
•Remove the 2 bolts (18) from the gear
cover (11) and slide the cover off of the
shaft end, being careful not to damage
the inside of the lip seal on the edges of
the keyway in the shaft. Rotate the gear
cover 180° and re-fit by tightening the 2
bolts. Tighten to the torque specified in
Table 1.

10
Vertical Ports Left Shaft Drive
(When viewed from front)
Figure 4 - Vertical ports left shaft drive
•Remove the black hole covers from the
foot location recess and place in a safe
location (33 & 34)
•Push the foot dowel pin (32) (Supplied in
the foot kit) into the un-tapped hole in the
bottom right foot location recess.
•Mate the dowel pin in the bottom right
foot location recess into the dowel pin
hole in the vertical foot (22).
•Push the foot home until the foot face
mates with the foot location recess face.
•Fit the foot bolts (21) (Supplied in the foot
kit) through the feet into the bearing
housing (1) and tighten to the torque
specified in Table 1.
•Repeat the process for the 2nd foot using
the top right foot location recess.
•Refit the black hole covers into the left
foot location recesses.
•Remove the breather plug (12) and sight
glass (13) and swap their positions.
Tighten the breather plug and sight glass
to the torque specified in Table 1.
Vertical Ports Right Shaft Drive
(When viewed from front)
Figure 5 - Vertical ports right shaft drive
•Remove the black hole covers from the
foot location recess and place in a safe
location (33 & 34)
•Push the foot dowel pin (32) (supplied in
the foot kit) into the un-tapped hole in the
bottom left foot location recess.
•Mate the dowel pin in the bottom left foot
location recess into the dowel pin hole in
the vertical foot (22).
•Push the foot home until the foot face
mates with the foot location recess face.
•Fit the foot bolts (21) (Supplied in the foot
kit) through the feet into the bearing
housing (1) and tighten to the torque
specified in Table 1.
•Repeat the process for the 2nd foot using
the top left foot location recess.
•Refit the black hole covers into the left
foot location recesses.
•Remove the key (29) from the drive shaft
end.
•Remove the 2 bolts (18) from the gear
cover (11) and slide the cover off of the
shaft end, being careful not to damage
the inside of the lip seal on the edges of
the keyway in the shaft. Rotate the gear
cover 180° and re-fit, tightening the 2
bolts. Tighten to the torque specified in
the torque table below.
•Remove the breather plug (12) and the
sight glass (13) and swap their positions.
Tighten the breather plug and the sight
glass to the torque specified in Table 1.
For HP32 and HP34 only
Due to the HP32 and HP34 design only 1 foot is
required for all variations of port and shaft
combinations.
•Remove the black hole covers from the
foot location recess and place in a safe
location (34)
•Align foot mating face on desired bearing
housing boss face to achieve required
shaft and port orientation.
Figure 6 - HP32 & HP34 only

11
•Fit the foot bolts (21) (Supplied in the foot
kit) through the feet into the bearing
housing (1) and tighten to the torque
specified in Table 1.
Pump Size
Fixing
Torque
Nm
HP3
Foot Bolt
25
Gear Cover Bolt
8
HP4
Foot Bolt
25
Gear Cover Bolt
8
HP5
Foot Bolt
72
Gear Cover Bolt
10
HP6
Foot Bolt
72
Gear Cover Bolt
10
Feet bolts should have thread lock applied before
fitting such as 'Loctite 243 Thread Lock'
Table 1 - Torque Table
3.4 DRIVES
If the HP & LH pump was supplied in bare shaft
form i.e. without a drive motor, the drive must be
selected and supplied to suit each individual
application.
Pay attention to special motor requirements.
•Explosion/flame proof
•Hose proof/splash proof
•High ambient temperature
•Frequent stop/starts
•Materials of construction
•Available electrical voltage and frequency
Provision of a variable motor speed (i.e. by
frequency inverter), is always recommended to
enable flow to be accurately set, accommodate
changes in fluid viscosity, changes in temperature,
or to run the pump faster for cleaning. Variable
speed motors must be selected to accommodate
the full power and torque requirements
throughout the operating speed range.
Transmission to the pump shaft will normally be
by one of the following:
Direct Coupling:
If synchronous motor speeds can be matched to
the required pump speed, the drive can be via a
proprietary flexible shaft coupling.
A torque limiting coupling can protect the pump
against overload.
In all cases the coupling manufacturer’s limits
should be adhered to.
See performance curve to calculate torque.
Pump and motor shafts should be accurately
aligned in accordance with the coupling
manufacturer’s instructions.
Motor reductor:
For pump speeds lower than synchronous motor
speeds, a proprietary motor reductor may be
fitted. Variable ratio units are available to allow
the pump speed to be adjusted. Coupling to the
pump will be as in above bullet point.
3.5 BASEPLATE
The pump and drive will normally be mounted on
a common baseplate or frame which must be
strong and rigid enough to withstand the drive
reaction forces as well as to support the
equipment without vibration. Ensure the base is
level as distortion could affect coupling alignment.
Always check pump to drive alignment after
installation and before starting the pump.
For hygienic applications the following conditions
should also be met:
•Baseplates should be constructed from
stainless steel or coated / painted mild
steel.
•Legs, when used, must have either
rounded ends or have flat load bearing
feet suitable for floor mounting with no
exposed threads.
•Legs made from hollow stock must be
sealed.
•Baseplates should be sealed to the floor.
3.6 GUARDS AND SAFETY
ATTENTION
The machinery is incomplete and must not be put
into service until the machinery into which it is to
be incorporated has been declared in conformity
with the provisions of the Directive.
ATTENTION
All moving parts must be guarded, and in
accordance with the applicable Directive.

12
Local safety regulations and codes of practice will
specify the minimum acceptable standard but as
a guide:
•Couplings, belts and pulleys must be
enclosed to prevent fingers, clothing or
tools from touching moving parts.
•Guards must be made from corrosion
resistant materials.
•Guards in hazardous areas must be made
from non-sparking material.
•Guards must be securely fixed.
•Pump must not be operated with guards
removed.
3.7 ELECTRICAL CONNECTION
OF THE MOTOR
The electrical connections may only be made
when no electrical power is connected and by
qualified personnel in accordance with EN 60204
and the local regulations. Special attention must
be paid to optimal earthing of the motor; this
must be performed in accordance with the
applicable regulations in the relevant country.
Check on the name plate of the motor whether
the motor can operate from the available voltage
and frequency.
The connecting cables and the protection system
against excessive currents must be chosen
according to the data on the name plate of the
motor. The voltage drop during the starting of the
motor may not exceed 3 %.
Tighten the nuts of the connector terminals in
accordance with the torque values (Nm) stated
below:
Terminal
M4
M5
M6
M8
M10
M12
M16
Steel
2
3.2
5
10
20
35
65
Copper
1
2
3
6
12
20
50
Do not install any washers or nuts between the
cable lugs of the motor windings and the cable
lugs of the connecting cables.
Inspect the seal of the gland. The gland must
match the diameter of the connecting cable used.
Bending of the cable beside the gland must not
allow water to penetrate. (Allow the cable to be
routed downwards when it leaves the motor.)
Connect the motor in star or delta according to
the designation on the name plate of the motor
and in accordance with the diagram that is
installed in the terminal box. Do not connect the
motor if you have any doubts regarding the
interpretation of the connection diagram. If in
doubt please contact JEC. Never check the
direction of rotation of the pump when the
terminal box is open. The technician is
responsible for complying with the regulations
relating to electrical compatibility in the country
where the pump is installed.
The voltage and the frequency stated on the
name plate of the motor must be observed.
(Tolerance of 5 % for the voltage, and 1 % for
the frequency.)
For pumps whose power exceeds 7.5 kW, special
starting provisions must be provided (star-delta
starter, soft starter, or starting with frequency
converter).
The installation of an overcurrent
protection device is always mandatory.

13
3.8 PORTS AND PIPEWORK
To add or change any pump ports the correct
port kit needs to be applied. Port kits contain all
components required to change assemble the
ports to the pump.
The correct port gasket (elastomer type) is
supplied with the pump.
•Ensure the port seal (53) is free from
debris
•Push the port seal into the seal area on
the port flange (54). (Seals will only fit in
one orientation)
•Locate the port (with seal assembled)(53
& 54) on the rotor case (51) using the
location boss on the port and recess on
the side of the rotor case. (This is a small
circle on HP pumps locating around the
seal area locating on the outside diameter
of the port flange.)
•Fit the port bolts (55) through the port
into the rotor case and tighten to a torque
of 20Nm.
Note: HP3 size and LH pumps have welded ports.
Pipe runs and sizes should be established at the
time the pump is selected.
When installing the pump do not deviate from
this design without rechecking the pump selection:
•Keep pipe runs short and pipe diameters
large; pipes may need to be larger
diameter than pump ports especially when
pumping viscous liquids to prevent
cavitation.
•Use large radius bends and full bore
valves. Avoids globe or needle valves on
viscous fluids.
•Fit isolation valves on each side of the
pump to simplify maintenance.
•Fit vacuum/pressure gauges each side of
pump to monitor pressure conditions.
Once the process is established (and will
not change), these can be removed.
•Avoid filters on the inlet side of the pump
if possible. A clogged filter will cause
cavitation. A strainer - maximum hole size
50 microns - will help to protect the pump
from damage by particles, but must be
kept clear.
•Support the pipework - the weight of the
pipe and the fluid within may not rest on
the pump.
•Fit expansion joints if necessary to
prevent thermal expansion forces being
transmitted to the pump.
•Ensure all pipe joints are:
oAir-tight under vacuum;
oLiquid tight under pressure, and;
oSteam tight where applicable.
•Take special precautions when pumping
hazardous, hot, toxic or bacteriological
fluids - special joints and high specification
seals may be required.
•Use hot water/steam jackets or electrical
resistance tape to heat pipes carrying
liquids which thicken when cool. Provide
an interlock to prevent the pump from
running unless the liquid in the pipes is at
correct temperature to avoid over
pressure, cavitation, or excessive drive
shaft loads.
3.9 ENLARGED RECTANGULAR
INLET
The weight of the hopper (Including the product
it contains) must be supported separately and is
not allowed to rest entirely on the pump as this
would affect the rotor clearances leading to pump
seizure. The mating flange of a hopper or screw
feeder should be machined to the identical
dimensions of the rectangular inlet and sealed.
This will avoid ledges where product could ‘hang
up’. Ensure effective flow of viscous material into
the pump.
3.10 TEMPERATURE CONTROL
JACKETS
Pumps are available with optional temperature
control jackets. These allow hot or chilled water,
oil or steam to be piped to the pump to maintain
the product temperature in the pump or to heat
the pump prior to starting.
Pump Head –Thermal Jacket

14
Figure 7 - Pump head - thermal jacket
Can be used in conjunction with end cover relief
valve.
End Cover –Thermal Jacket
Figure 8 - End cover - thermal jacket
Application limits are:
•Jacket Pressure: 2 bar (30 psi).
•Temperature: 130ºC (265ºF).
3.11 SEALS AND FLUSHING
Three basic types of mechanical face shaft seal
are available on the HP & LH pumps.
The correct type should have been selected when
the pump was originally selected but you must
establish that the seal fitted is suitable for the
application before starting the pump.
Provide flushing system as required.
There is also 1 seal which is not a mechanical
face type; this is the Packed Gland seal available
on HP42/44 and HP52/54 size pumps.
The Single Mechanical Seal is suitable for
many clean fluids which do not require a more
sophisticated seal type. (Figure 9)
Figure 9 - Single mechanical seal (Size 4-8)
Note that silicon carbide-on-silicon carbide, seals
are not recommended for steam-purged
applications as the seal faces can bind together
–see chapter 5 CLEANING AND STERILISATION.
Pumps fitted with single seals require no special
installation.
However, pumps must never run dry, as this will
cause excessive heating of the seal faces.
Use flushed seals in pumps that need to run dry.
The Flushed Mechanical Seals fitted to HP &
LH pumps are run with a low-pressure liquid flush
between the primary mechanical seal and a lip
seal to form a barrier between the pump and the
atmosphere.
This allows the pump to be used for applications
where the single seal is unsuitable. (Figure 10)
Figure 10 - Flushed single seal (Size 4-8)
Flushed seals are used when:

15
•Pumped fluid changes state in contact
with air, i.e. crystallizes, forms a film,
dries out or precipitates solids. The flush
dissolves and rinses away the small
amount of residue which could build up on
the edges of the seal faces.
•Pumped fluid is close to its boiling point,
e.g. water over 80°C (175°F). The
flushing fluid is used to cool the seal faces.
•Pumped fluid is temperature sensitive and
evaporates when heated by the shearing
action of the seal faces. The flushing fluid
is used to cool the seal faces.
•Pump may run “dry”, i.e. no liquid in
pump chamber for very short periods.
•Pump is under high vacuum.
•A low pressure sterile barrier is required.
A low-pressure flushing fluid system must
be installed as follows:
•Liquid must be compatible with the
pumped fluid; water is the most
commonly used liquid.
•Pressure shall typically be 0.5 bar (7 psi)
gauge. Maximum of 1.0bar (14.5 psi)
gauge.
•Temperature shall be maximum of 70ºC
(160ºF) for water, less for volatile liquids
(minimum 20ºC (68ºF) below boiling point
of liquid).
•Flow rate shall preferably be 2 to 3
litres/min. (0.5 to 0.75 US gal/min) per
seal.
•Flush fluid should be connected to enter
at the lowest point on the seal housing
and flow out at the highest point to vent
air pockets.
•Pipework should be as shown in the
diagram (Figure 11).
Figure 11 - Suggested low pressure flushing system
The Double Mechanical Seals fitted to HP &
LH pumps provide the facility to contain a high
pressure fluid behind the primary seal. This allows
the pump to be used for applications where the
single seal is unsuitable.
Double seals code D are run with a fluid between
the primary and secondary mechanical seals to
form a barrier between the pump and the
atmosphere. (Figure 12)
Figure 12 - Double mechanical seal (Size 4-8)
Double Mechanical Seal with a low pressure
liquid flush when:
ATTENTION
•The pumped fluid is toxic or hazardous
and must not escape from the pump even
in minute quantities.
•The system can be installed as in figure 12,
but must be capable of withstanding the

16
full pressure within the pumped fluid pipe
system.
Double Mechanical Seal with a high
pressure liquid flush when:
•The pumped fluid has no lubricating
properties and cannot be allowed onto
seal faces
•The pumped fluid is highly viscous, i.e.
over 150,000 cP.
•A high pressure sterile liquid barrier is
required.
When the double seal is used with a high
pressure liquid flush for the reasons described
above, a flushing system must be installed as
follows:
•The flushing liquid used must itself be
compatible with the pumped fluid and
must itself not require a complex seal, i.e.
must be non-hazardous, non-abrasive and
lubricating.
•Flush liquid must be at a pressure of 1 bar
(15psi) above the discharge pressure of
the pump and should flow at 35 to 55
litres/hour (10 to 15 US gal/hour) per seal.
•Flush fluid should be connected to flow in
at the lowest point on the seal housing
and out at the highest point to vent air
pockets.
Refer to the drawing below for the suggested
liquid flush system (Figure 13).
Figure 13 - High pressure liquid supply for double seals
Double Mechanical Seal with steam when:
No bacteria or contamination can be allowed to
enter the pump, i.e. an aseptic system.
A steam barrier system must be installed as
follows:
ATTENTION
•Wherever possible, sterile liquid i.e. steam
condensate should be used as a flush.
Condensate should be connected to flow
in at the lowest point on the seal housing
and out at the highest point to vent air
pockets.
•Where steam is essential, great care must
be taken with the design of pipework,
steam traps and controls.
•Steam must be clean, filtered and wet, i.e.
not superheated.
•The pressure of steam should be as low as
possible consistent with the desired
temperature.
•Steam should be connected in at the
highest point on the seal housing and out
at the lowest point to allow any
condensate to drain from the lowest point.
•Refer to Figure 14 for suggested steam
connection.

17
Figure 14 - Steam barrier flush system for double
mechanical seal
ATTENTION
Silicon carbide on silicon carbide seals are not
recommended for steam flushed applications.
Double mechanical shaft seals are not available
on the HP32 or HP34 size pumps.
3.12 SEAL MATERIALS
SEAL FACES
All primary seals are available with carbon on-
silicon carbide faces for non-abrasive fluids and
silicon carbide on-silicon carbide faces for
abrasive fluids containing crystals, powders or
particles or when no particles of wear can be
allowed to enter the pumped fluid. Silicon
carbide-on-silicon carbide seals are not
recommended for steam flushed applications.
Carbon on stainless steel single seals are
available for nonabrasive and lubricating fluids.
All secondary double mechanical seals are with
carbon on silicon carbide faces.
ELASTOMERS
Product contacting primary elastomers must be
selected to be compatible with the product and
the process operation.
Consideration must be given to chemical
compatibility, temperatures and material
standards. HP & LH pumps are available with a
range of elastomers:
Nitrile
1935/2004 EC, FDA grade
EPDM
1935/2004 EC, FDA grade
Viton
1935/2004 EC, FDA grade
PTFE
1935/2004 EC, FDA and USP grade
Table 2- Elastomer approvals
Consult the supplier for more information.
3.13 END COVER RELIEF VALVE
HP & LH pumps can be fitted with a cover relief
valve which can be set to protect the PUMP
ONLY from overpressure.
ATTENTION
This valve is not designed to protect the system
or to provide long term by-pass of liquid.
If this is required then an IN-LINE relief valve
should be fitted which can by-pass the liquid back
to the suction vessel during overpressure
situations.
The maximum pressure rating of the pump is
stated on the nameplate.
The relief valve should be set so that it opens
before it reaches this pressure.
Be aware that there may be a piece of equipment
in the system that is limited to a lower pressure
than the pump. (See section 3.11 SEALS AND
FLUSHING)
If this is the case then the pump end cover relief
valve should be set so that the pump cannot

18
exceed this pressure.
Setting the relief valve:
This should be done, if possible, using the liquid
to be pumped.
Figure 15 - Relief valve
•Screw the adjusting screw (135) clockwise
so it enters the housing as far as possible.
This ensures that the valve is fully closed.
•A pressure gauge is required to be fitted
in the pipe system directly after the pump.
•Start the pump running.
•Increase the pressure on the pump by
closing a valve downstream or increasing
the pump speed. Continue until the
desired relief valve pressure setting is
achieved.
ATTENTION
•MAKE SURE THAT THE MAXIMUM
PRESSURE OF THE PUMP IS NOT
EXCEEDED. CHECK THE NAMEPLATE.
•Start unscrewing the adjusting screw (135)
counter-clockwise until the pressure
gauge reading starts to drop.
•If a small rod is inserted into the end of
the adjusting screw until it contacts the
end of the valve guide (134) it is possible
to feel the movement of the valve.
The valve is now set.
•Check the relief valve setting by opening
the downstream valve or reducing the
pump speed. It will be necessary to
reduce the pressure to approximately 10%
of the set pressure to ensure full closure
of the relief valve.
•Alternatively stop the pump.
•Re-start the pump or increase the
pressure as stated in relation to the
setting of the relief valve.
•The relief valve should open at the set
pressure.
•Make further adjustments if necessary.
Overload protection
ATTENTION
To prevent injury to personnel or damage to the
pump or system caused by excessive pressures, a
protection device should be fitted such as:
•A pressure switch or sensor that stops the
drive motor. Ideally, the motor should be
fitted with a brake.
•A pressure relief valve or bursting disc
fitted downstream of the pump and
necessary piping to direct excess fluid
away safely.
•A relief Valve fitted to the pump end cover.
•A torque limiting coupling between drive
and pump shaft.
•A motor current sensor.
ATTENTION
Protection devices must be set to operate at, or
below, the safe operating pressure of the pump
or of the system, whichever is the lower.
NOTE; that maximum pressure varies with the
temperature.
3.14 LUBRICATION
Packo HP & LH pumps have oil lubricated shaft
bearings and timing gears.
ATTENTION
Pumps are supplied with Nevastane XSH150 oil in
the bearing housing.
•After the first 120 hours of service, drain
the lubricating oil from the bearing
housing and refill with fresh oil of the
correct grade.
•Check oil level regularly and top up as
necessary.
•Any substantial oil losses should be
investigated immediately.
Oil capacity gearbox:
Pump model
Oil capacity

19
HP/32 & 34
0,38 liter
HP/42 & 44
0,66 liter
HP/52 & 54
1,17 liter
HP/62 & 64
2,20 liter
LH/72, 74 & 76
5,50 liter
4 START UP & ROUTINE
CHECKS
4.1 START UP
Before starting the pump for the first time or after
servicing or maintenance work, check the
following - failure to do so could damage
equipment or cause injury to personnel.
•Pump and pipes are clear of welding flash
or other debris.
•All pump head and mounting bolts are
tight.
•All pipe connections are secure
•All guards, safety and protection devices,
are in place and effective.
•Check the motor is wired for the correct
direction of rotation (Figure 16 and Table
3 - Direction of flow)
•Flushing fluid, if required, is flowing.
(See 3.11 SEALS AND FLUSHING )
ATTENTION
Do not use HP or LH pumps to flush the system
the first time. Flush the whole system with
suitable cleaning agents before starting the pump,
using another more suitable pump if necessary.
Be aware that heavy or metal debris tends to
collect at the lowest point in the system.
•All valves are open - NEVER run the
pump against a closed valve.
•Pipes and pump head, if heated, are to
normal operating temperature.
•Pump is correctly lubricated.
(See 3.14 LUBRICATION)
Figure 16 - Direction of rotation - viewed from pump
head (Principle applies to all mounting orientations)
DIRECTION OF FLOW
VIEWED FROM PUMP HEAD END
DIRECTION OF
DRIVE SHAFT
CLOCKWISE
ANTI-
CLOCKWISE
HORIZONTAL
PORTS TOP
SHAFT DRIVE
LEFT TO
RIGHT
RIGHT TO LEFT
HORIZONTAL
PORTS BOTTOM
SHAFT DRIVE
RIGHT TO
LEFT
LEFT TO RIGHT
VERTICAL
PORTS
LEFT SHAFT
DRIVE
BOTTOM TO
TOP (UP)
TOP TO
BOTTOM
(DOWN)
VERTICAL
PORTS
RIGHT SHAFT
DRIVE
TOP TO
BOTTOM
(DOWN)
BOTTOM TO
TOP (UP)
Table 3 - Direction of flow
When possible, start the pump slowly and
increase speed gradually.
•Listen for unexpected noises.
•Check for leaks.
•Check that the pump gives the desired
flow rate, using the pumped media at
normal operating speed.
•Do not continue to run the pump if the
fluid is not flowing; dry running can
damage seals.
(See 3.11 SEALS AND FLUSHING)
ATTENTION
•Observe the pump during the first few
hours of operation - check for noises and
excessive heating of pump, e.g. if above
80°C (176°F), unless pumping hot liquids

20
when 110°C (230°F) may be reached.
•If operating at high speeds or with hot
liquids, the surface of the pump can
become hot.
4.2 DAILY CHECKS
•Visual checks of all seals for signs of
leakage of product, flushing liquid (if used)
and oil from the gearbox.
•Check the Packed gland seal for excessive
leakage (if used)
•Listen for any unusual noises
•Check for any vibration or temperature
changes.
•If minor problems are identified these
should be rectified at the end of the shift
and if major they should be attended to at
once.
4.3 WEEKLY CHECKS
•As Daily Checks.
•Remove the end cover of the pump and
inspect for signs of damage or wear.
Repair or replace if necessary.
•If the main product shaft seals are of the
packed gland type, inspect them for signs
of wear. Replace or plan for replacement
as necessary.
•Check the lubrication level and top up if
necessary. This must be done with the
pump stopped.
•Check lubrication level on drive unit and
top up as necessary. Follow the
manufacturer's instructions.
4.4 MONTHLY CHECKS
•As Weekly Checks.
•Remove the end cover and inspect the
surfaces.
•Visually check the rotor surfaces.
•If an end cover relief valve is fitted check
its function. If the relief valve is not
operating on a regular basis the
diaphragm may have a tendency to stick.
4.5 SIX MONTHLY CHECKS
•As Monthly Checks.
•Change the end cover O-ring or end cover
gasket.
•Remove the rotors for visual inspection
and signs of wear.
•Inspect the seal faces for wear and the
condition of the elastomers. Replace if
necessary or note for planned
maintenance.
4.6 ANNUAL CHECKS
•Change the mechanical seals if fitted, and
if required.
•Replace the lip seal on the mechanical
seal flush housings.
•Replace the end cover relief valve
diaphragm.
•Change the packing rings on the packed
gland type shaft seals.
•Change all L-cups, O-rings and/or gaskets
on pump head.
•Inspect gearbox oil seals and gear cover
gasket for signs of leakage and replace if
necessary.
•Check bearing wear by seeing if there is
any movement of the shaft side to side or
forwards and backwards. If movement is
perceived remove the gear cover and
dismantle the bearings for inspection,
replace if necessary.
•Drain and change the oil in the pump
gearbox.
By ensuring a visual inspection daily and regular
checks at planned intervals, pumps can be
maintained to maximum performance for many
years.
Failure to maintain the pump by carrying
out the above checks may invalidate
warranty.
5 CLEANING AND
STERILISATION
HP & LH pumps are designed for use with
products that require the process equipment and
pumps to be cleaned. The standard (level) of
cleaning or sanitization required depends on the
needs of the process and product. This
information is provided for guidance only. It is the
responsibility of the pump user to make sure that
the cleaning protocol chosen is adequate to
achieve the desired levels of cleanliness and JEC
cannot accept any responsibility for contamination