Dover PSG Blackmer S Series Instruction manual

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Installation
Operation
Maintenance
Manual
S SERIES
Triple Screw Pumps

SECTION X
TABLE OF CONTENTS
Blackmer pump manuals and parts lists may be obtained from the Blackmer website (blackmer.com) or by contacting Blackmer Customer Service.
SECTION 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SECTION 2 PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3N/3M/3PF MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PUMP IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
STRUCTURAL DESIGN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRESSURE LIMITING VALVE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PUMPING UNIT STRUCTURE.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SECTION 3 RECEIVING, HANDLING AND STORAGE. . . . . . . . . . . . . . . . . . . . . . . . . . .5
LOADING AND UNLOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
STORAGE AND PRESERVATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION 4 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
LOCATION6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOUNDATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PIPING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PIPING SYSTEM ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
COUPLING ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
FLUSHING THE PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SECTION 5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PUMP PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
STARTING THE PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RUNNING THE PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
STOPPING THE PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SECTION 6 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SECTION 7 ROUTINE AND PREVENTIVE MAINTENANCE
ROUTINE MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INDIVIDUAL PART MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SECTION 8 DISASSEMBLY AND REASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 9 3N / 3M SERIES PUMPS GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 19
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
REASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
CROSSSECTIONAL DIAGRAMS
3NH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PARTS LISTS 3NH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CROSSSECTIONAL DIAGRAMS
3MH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
PARTS LISTS 3MH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

1S SERIES TRIPLE SCREW PUMPS
SECTION 1
INTRODUCTION
FOREWORD
This manual is intended to assist those who are involved with the installation, operation and maintenance of a Blackmer® S Series Triple
Screw Pumps. Strictly follow the safety rules stipulated in this manual. These instructions must be thoroughly reviewed in their entirety
and fully understood prior to the pump installation, operation or maintenance care. Special appropriate attention should be given to
pump lubrication, heating, cooling and sealing during pump installation, operation and maintenance.
Local and/or company practices must be observed and followed at all times.
This manual covers the Blackmer S Series Triple Screw Pumps 3M, 3N and 3PF models.
This is a SAFETY ALERT SYMBOL.
When you see this symbol on the product, or in the
manual, look for one of the following signal words and
be alert to the potential for personal injury, death or
major property damage.
Warns of hazards that WILL cause serious
personal injury, death or major property
damage.
Warns of hazards that CAN cause serious
personal injury, death or major property
damage.
Warns of hazards that CAN cause personal
injury or property damage.
NOTICE:
Indicates special instructions which are very important and must be followed.
WARNING
DANGER
CAUTION
NOTICE:
Blackmer Power Pumps MUST only be installed in systems, which
have been designed by qualied engineering personnel. The sys-
tem MUST conform to all applicable local and national regula-
tions and safety standards.
This manual is intended to assist in the installation and operation
of Blackmer Power pumps, and MUST be kept with the pump.
Pump service shall be performed by qualied technicians ONLY.
Service shall conform to all applicable local and national regula-
tions and safety standards.
Thoroughly review this manual, all instructions and hazard warn-
ings, BEFORE performing any work on the pump.
Maintain ALL system and pump operation and
hazard warning decals.
NOTICE:
Maintenance shall be performed by qualied technicians
only, following the appropriate procedures and warnings
as presented in this manual.
Hazardous machinery
can cause serious
personal injury.
WARNING Failure to disconnect and
lockout electrical power
or engine drive before
attempting maintenance
can cause severe
personal injury or death.
Hazardous or toxic
uids can cause
serious injury.
WARNING If pumping hazardous or
toxic uids, system must
be ushed and
decontaminated, inside
and out, prior to
performing service or
maintenance.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Disconnecting uid or
pressure containment
components during
pump operation can
cause serious personal
injury, death or major
property damage.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Failure to relieve system
pressure prior to
performing pump service
or maintenance can
cause serious personal
injury or property
damage.
Hazardous voltage.
Can shock, burn or
cause death.
WARNING Failure to disconnect and
lockout electrical power
before attempting
maintenance can cause
shock, burns or death.
Do not operate
without guard in place.
WARNING Operation without
guards in place can
cause serious personal
injury, major property
damage, or death.
Heavy assemblies can
cause personal injury or
property damage.
CAUTION Always use a lifting
device capable of
supporting the full
weight of the pump
assemblies.

S SERIES TRIPLE SCREW PUMPS 2
SECTION X
INTRODUCTION
SAFETY PRECAUTIONS
This manual contains basic references that are to be observed
during pump transportation, installation, operation and
maintenance, and, therefore, should be kept as part of the
permanent pump records and readily accessible as a reference to
any person working or maintaining the pumping unit.
The instructions within this manual must be thoroughly reviewed
in their entirety and fully understood prior to pump installation,
operation or maintenance care.
These pumps have been designed for safe and reliable operation
when properly used and maintained in accordance with the
instructions contained within this manual. A pump is a pressure-
containing device with rotating parts that can be hazardous. Failure
to read and comply with installation, operation and maintenance
instructions will void the responsibility of the manufacturer and
may result in bodily injury or equipment damage.
Markings and Instructions on Pump Unit
Instructional references regarding direction of rotation, uid-ow
orientation, safety warning, etc., are clearly marked on the pump.
Please observe and follow all indicated safety markings and
instructions.
Failure to observe safety references can result in the following:
• Equipment failure
• Maintenance and service policies voided
• Environmental pollution due to hazardous substance leakage
• Personal endangerment as a result of electrical, mechanical
and chemical inuences
Qualied Personnel and Training
All persons installing, operating, maintaining and inspecting the
pumping unit must have the required qualications for work
to be performed. All instructions and safety markings must be
observed, understood and adhered to by all personnel working
on or around the pumping unit. If installation or operational
knowledge is inadequate, training must be provided. The scope of
the personal responsibilities, competency and supervisory duties
must be closely controlled by the purchaser of the pumping unit.
Safety Guidelines
All work performed on or around the pumping unit must be
completed by qualied personnel.
• Machine components that are either hot or cold must be
protected on-site to prevent personal endangerment.
• The pump must be stopped and power locked out before
performing any maintenance.
• Safety markings on the pumping unit must not be removed.
• Leakage of hazardous media (i.e., toxic, ammable, explosive,
etc.) must be collected in a way that no damage to personnel
or environment occurs.
• If the pumped media is explosive, toxic or ammable, a
warning or alarm device must be installed, pump housing
must be well ventilated and the operating site must be a no
smoke/re zone.
• To prevent damage due to electricity, all electrical devices
must be safely protected, functional and controlled.
Pump Must Meet Specied Operating Parameters
Unless there is written permission by Blackmer, the pump must
not be operated at higher parameters than specied. Adhering
to these specications is meant to prevent danger to persons and
damage to equipment.
Pump Monitoring
Suitable measuring devices must be installed to inspect and
control the pump during operation. Generally, pressure gauges
are to be installed on suction and discharge lines near the pump.
NOTE: A pressure relief valve (external bypass valve) must be
installed in the discharge pipe of the pump.

3S SERIES TRIPLE SCREW PUMPS
SECTION 2
PRODUCT SPECIFICATIONS
The S SeriesTriple Screw Pump manufactured by Blackmer is a type
of positive displacement rotatory screw pump for handling clear,
lubricating liquid without solid content. The internal structure of
the Triple Screw Pump includes a male drive screw with double-
end screws, two female double-end secondary screws and the
case that holds the three screws. The sealed chamber moving
at a uniform speed is formed between the case and the three
rotating screws along the axial direction. During the male drive
screw rotation, liquid moves in the sealed chamber along the axial
direction continuously and smoothly from suction to discharge.
3N/3M /3PF MODELS
The axial force applied on the drive screw surface of the 3N/3M
/3PF pump models is balanced by the balance piston so that the
rolling bearing takes a small residue axial force and thus extends
the life of the bearing. The balance of the secondary screws is
achieved by the balance sleeve. For the 3PF series, the axial force
applied on the drive screw is balanced by the balanced piston;
meanwhile, the secondary screw is driven by hydraulic force. The
surface of the screws transmit the torque generated by hydraulic
friction so that there is no wearing on the screw surfaces. The axial
force of the secondary screw is applied to the end cover.
The liquid suction of the pump is specially designed to ensure
consistent liquid ow rate at uniform speed and lower resistance
losses. The pump has a relatively low NPSHr value and, therefore,
has a strong suction capability. The suction and discharge of the
pump are located at the sides of the pump body or top of the
body. This ensures that when the pump stops, enough media is
kept in the pump body for strong self-prime capability.
PUMP IDENTIFICATION
A pump identication tag, containing the pump serial number, I.D.
number, and model designation, is attached to each pump. It is
recommended that the data from this tag be recorded and led for
future reference. If replacement parts are needed, or if information
pertaining to the pump is required, this data must be furnished to
a Blackmer representative.
* Technical Data is for standard materials of construction.
Consult Blackmer Material Specs for optional materials of construction.
INITIAL PUMP START-UP INFORMATION
Model No.______________________________________________
Serial No.______________________________________________
ID No. _________________________________________________
Date of Installation: _____________________________________
Inlet Gauge Reading: ____________________________________
Discharge Gauge Reading: _______________________________
Flow Rate: _____________________________________________
3N 3M 3PF
Maximum Pump Speed 3600 rpm 3600 rpm 3600 rpm
Maximum Operating Temperature 248˚F
(120˚C)
248˚F
(120˚C)
248˚F
(120˚C)
Maximum Dierential Pressure 580 psi
(40 bar)
1450 psi
(100 bar)
580 psi
(40 bar)
TECHNICAL DATA*

S SERIES TRIPLE SCREW PUMPS 4
SECTION 3
PRODUCT SPECIFICATIONS
PRESSURE LIMITING VALVE
Blackmer positive displacement pumps are equipped with a
pressure limiting valve to prevent excess pressure build up.
The starting pressure of the pressure limiting valve is typically
10% higher than the rated working pressure of the pump. If
the discharge pipe is restricted or shut-o, the pressure of the
pump will build rapidly and the pressure limiting valve will open.
If the discharge pipe is restricted for a long period of time the
temperature of the media will rise, possibly damaging the pump.
When operating the pump, all valves in the discharge pipe must
be open. The pressure limiting valve on the pump cannot be used
to control the ow or pressure.
NOTICE: The pump pressure-limiting valve is designed to protect
the pump from excessive pressure and must not be used as a
system pressure control valve.
FILTER
3PF model is equipped with an integrated lter with a 60-mesh
screen to avoid the large solids entering the pump.
A vacuum/pressure meter is installed on the lter to indicate the
pressure drop. When pressure loss occurs on the lter, the user is
reminded to clean the lter to avoid clogging of the system.
PUMP UNIT STRUCTURE
DRIVE
The pump can be connected to various motor or other drivers via
coupling.
Please refer to the data sheet of the contract for the specic motor
parameters.
SHAFT CONNECTION
The power is transmitted via elastic coupling. No radial force is
applied on the drive screw.
A safety protection device must be installed on the coupling of the
pump unit to avoid accidents.
BASE-PLATE
Mechanical support must be designed for the base-plate in order
to limit the error of coupling anges alignment to less than 50 µm
(0.002 inch) under the worst pressure, torque and allowed piping
stress applied simultaneously.
STRUCTURAL DESIGN
BEARING AND LUBRICATION
The 3N, 3M and 3PF pump models use the deep groove ball
bearing. Internal or external bearings can be used based on
working conditions.
As shown in Figure 2.1, when an internal bearing is used, the
bearing is lubricated by the media. When an external bearing is
used, the bearing is lubricated by lubricating grease.
SHAFT SEAL
Triple Screw Pumps use a single mechanical seal, as shown in
Figure 2.2.
CONNECTIONS
Internal Bearing External Bearing
Figure 2.1 – Bearing Locations
Figure 2.2 – Single Mechanical Seal
Figure 2.3 – 3N/3M Models
B1/B2 ❱Drainage Connection
E3/E4 ❱Vent Connection
M1/M2 ❱Instrument Connection
M1/M2: ❱Instrument Connection
Figure 2.4 – 3PF, without lter
M1M2
B7 ❱Drainage Connection
E7 ❱Vent Connection
M1/M2/M3 ❱Instrument Connection
M 2
M 1
B 7
E 7
M 3
Figure 2.5 – 3PF, with lter

5S SERIES TRIPLE SCREW PUMPS
SECTION 3
RECEIVING, HANDLING AND STORAGE
A. Horizontal B. Vertical
Figure 3.1 – Lifting the Pump Head
Figure 3.2 - Lifting the Pumping Unit
A. Horizontal
B. Flanged
C. Vertical
RECEIVING
Place equipment in a controlled environment upon receipt.
Ordinary packing crates for the pump are not suitable to
withstand outdoor storage conditions beyond a 30-day
limit from date of delivery, not withstanding favorable/
unfavorable outdoor conditions. Improper storage can
damage the equipment, thus voiding product warranty.
Special long-term storage packing can be supplied by
Blackmer upon request.
It is at the client’s discretion to observe and relate the packing
and storage requirements in the Technological Agreement with
Blackmer.
Parts and quality checkpoint.
Upon receipt of shipment, carefully check the pump, driver, spare
parts, accessories and documentation in accordance with the
supplied Packing List to ensure no components are missing or
damaged. The identity of any missing or damaged components
must be communicated to the carrier and Blackmer. Damage
claims should be made at the time of the receipt and check.
LOADING AND UNLOADING
1. For transportation purposes, use suitable
lifting tools and attach lifting hooks to
places marked on packing. Strictly observe
applicable safety regulations for lifting
heavy loads.
NOTE: Do not lift pump by bearing housing.
2. When lifting the pump, attach lifting hooks
to outlet flanges as seen in Figure 3.1.
3. When lifting the pumping unit (motor
included), chain should be attached to the
hook of the base-plate. Make sure that no
pipes or attached auxiliaries are damaged.
See Figure 3.2 for reference.
STORAGE AND PRESERVATION
Pump units are affixed to the skids on the inside of the packing
crates in order to help prevent damage from standard loading
and unloading. All pump openings are covered with blank flanges
or special protective caps to keep pump cavity clean and free of
debris.
If pump is not to be installed or operated immediately, or if
pump is to be installed, but not operated immediately, the
pump units must be preserved as indicated below:
1. Store in a clean and dry location.
2. Apply acid and resin-free grease to all internal parts of the pump.
3. Ensure blank flanges or special protective caps covering
pump openings are properly attached.
4. Coat preservatives on all exposed shaft elements and places
that are not protected by paint.
5. Cover the pump and driver with plastic or waterproof canvas.
Heavy assemblies can
cause personal injury or
property damage.
CAUTION

S SERIES TRIPLE SCREW PUMPS 6
SECTION 4
INSTALLATION
LOCATION
The pump has been built to meet the requirements of a specic
pump capacity at a specic pressure. To meet these requirements,
consideration must be taken regarding the suction and discharge
side of the pump during installation. This information must be
provided to Blackmer engineers by the purchaser and specied
according to the pre-planned location of the pump installation
site. If, after receipt, the location of the pump is changed and
these pre-planned conditions are altered, please consult Blackmer
engineers immediately to ensure safe operation of the pump.
An appropriate amount of space must be kept for laying the pump
foundation. This is a critical pre-condition for pump assembly and
disassembly, installation, operation and maintenance.
It is suggested to locate the pump as close as possible to the
source of the media supply. Ideally, the pump location should
be clean and dry with enough space to perform the installation,
maintenance and preservation.
NOTE: If it is necessary to install the pump in a pit or cavity,
measurements must be taken and considered in an eort to
prevent ooding or any other unforeseen challenge to the
installation, maintenance or preservation of the pump.
FOUNDATION
Ground foundation should be suitable to absorb vibration
and provide rigid support for the entire pump unit. Generally,
reinforced concrete is used as a foundation material; however, a
steel structure foundation is also acceptable.
FOR STEEL-STRUCTURE FOUNDATIONS
The design of the steel foundation must connect (bear) the
complete surface of the foundation and can be connected to the
base-plate via bolts or welding.
NOTE: If the base-plate is only supported at four (4) points,
the middle part of the pump unit may sink, thus aecting the
alignment of the coupling and severe noise may occur.
FOR CONCRETE FOUNDATIONS
The concrete foundation must be level with a smooth surface and
able to bear the weight of the complete pump unit.
NOTE: The specication of the concrete foundation must meet the
B25 standard.
GROUTING
Proper measures must be taken to locate and hold the anchor
(foundation) bolts in the correct place while directly pouring
the concrete. The pipe sleeve’s inside diameter should be
approximately three to four times that of the outside diameter of
the anchor bolt.
1. After grouting, secure the pipe sleeves and adjust the anchor
bolt slightly to mate with the bolt holes on the base-plate
(see Figure 4.1).
Foundation
Grouting
Base Plate
NOTICE:
Blackmer power pumps must only be installed in systems
designed by qualied engineering personnel. System
design must conform with all applicable regulations and
codes and provide warning of all system hazards.
Install, ground and wire to local
and National Electrical Code
requirements.
Install an all-leg disconnect switch
near the unit motor.
Disconnect and lockout electrical
power before installation or service.
Electrical supply MUST match
motor nameplate specications.
Motors equipped with thermal protection automatically
disconnect motor electrical circuit when overload exists.
Motor can start unexpectedly and without warning.
PRE-INSTALLATION CLEANING NOTICE:
New pumps contain residual test uid and rust inhibitor.
If necessary, ush pump prior to use. Foreign matter enter-
ing the pump WILL cause extensive damage. The supply
tank and intake piping MUST be cleaned and ushed prior
to pump installation and operation.
Hazardous voltage.
Can shock, burn or
cause death.
WARNING
The following installation instructions are to assist in the proper
pump installation. Trouble-free operation of a pump begins with
proper installation practices and will also extend the life of your
pump. Should any questions arise during the installation process,
please contact the Blackmer Service Department for assistance.
The installation method of the pump depends on the model,
specication, motor and on-site conditions.
• For horizontal pump installation, the B3 type motor is usually
installed on the general base-plate.
• The anged pump must be supported with brackets and foot
for horizontal or vertical installation.
• The vertical-foot pump takes less space, and it can be installed
on the concrete foundation or base-plate brackets.
• Please refer to installation drawings for installation type and
dimensional requirements.
Figure 4.1 – Grouting

7S SERIES TRIPLE SCREW PUMPS
SECTION 4
INSTALLATION
2. Pour the liquid cement and sand to ll the space underneath
the base-plate. Mix the liquid through the pouring-hole on
the base-plate to remove any air in the liquid. Two methods
are commonly used to secure and prevent bolts from
turning:
Option A: Weld a lug to the
anchor bolt head to prevent
bolt turning (see Figure 4.2)
Option B: The bolt may be a
rod construction bent at 90
degrees below the pipe sleeve.
Pack the space between the
anchor bolt and the sleeve to
prevent concrete or grout from
entering this area. Anchor
(foundation) bolts must be
long enough to allow 20 mm
to 40 mm (0.79 inches to 1.58
inches) of space for grouting
under the base-plate. When
pump is level, the bolts should extend 6 mm to 10 mm (0.24
inches to 0.4 inches) through the screw nuts.
NOTE: If the pump unit needs to be installed on a steel deck plate
or another structure, directly install the pump on the surface or
install as close as possible to the main structural parts, roof beams
or main walls. Support is needed to maintain the concentricity of
the pump and motor and to prevent damage caused by structures
or base-plates being out of shape.
PUMP ALIGNMENT ON FOUNDATION
1. The foundation must be made rough and cleaned before
lifting the pump and motor onto the foundation.
2. A wedge must be placed close to anchor bolts, then remove
the stung in the sleeve and clean the base-plate.
3. The complete unit must be carefully placed on the wedge so
that the bolt holes pass through the anchor bolts.
4. Adjust the wedge so that the bottom of the base-plate is 20
mm to 40 mm (0.79 inches to 1.58 inches) higher than the
foundation for grouting.
5. Check the alignment of the pump and motor. Align and
calibrate the unit with a level if needed (see Figure 4.3).
6. Now, the nuts may be put onto the bolts and hand tightened.
7. Steel pieces are suggested to be placed in the middle of the
base-plate if the distance between the anchor bolt holes
must be greater than 750 mm (29.5 in).
8. Templates must be placed around the foundation for
grouting (refer to Figure 5.1). The mixture used for grouting
includes one (1) share of cement and two (2) shares of sand.
9. Add water to the mixture to make a thick sludge that can
ow freely. The rough surface of the top must be wetted
with an adequate amount of water.
10. Then pour the sludge through the grouting hole on the
base-plate. The mixture must be stirred with a iron bar to
release the air trapped in it.
11. When the sludge is fully cured, remove the templates. The
sludge usually cures in 72 hours after grouting.
12. Now tighten the anchor bolts and re-check the alignment of
the coupling.
NOTE: When tightening the nut on the anchor bolts to secure the
base-plate on the foundation, no additional forces may be applied
to the base-plate as this may cause deformation.
= =
>750
Figure 4.3 – Alignment and Calibration of Pumping Unit
Base Plate
Adjustment
Piece
Figure 4.4 – Adjustment
Base Plate
Adjustment Piece
Foundation Bolt Pipe Sleeve
Figure 4.2 – Anchor (Foundation) Bolt

S SERIES TRIPLE SCREW PUMPS 8
SECTION 5
INSTALLATION
PIPING SYSTEM
Since the pump’s basic operating parts are designed to be axed
on screws, extremely close running clearances exist between the
screws and the body; therefore, it is very important to have the
piping (especially the suction-side piping) cleaned thoroughly
before connecting the piping to the pump anges.
After the pump unit has been installed and secured on its
foundation, pipe connections may be installed.
NOTE: Please see pump outline drawing for location of all pipe
connections, ange sizes and other notes pertinent to piping.
Pipes should be as short and direct as possible. Use long radius
elbows to change direction when needed.
Suction piping must be at least the same size of the inlet diameter;
it is acceptable if the suction pipes are one class larger than the
inlet. For example, if the size of the inlet is 150 mm (6 in), the
suction pipes could be 200 mm (8 in). The pipe diameter (length of
pipe should be four [4x] times that of the pipe’s diameter) is used
to connect the suction pips and the inlet. Discharge piping should
be the same size as the diameter of the outlet.
All major piping parts, including suction pipes, discharge pipes,
valves and strainers, should be supported independently and
installed properly to avoid any unnecessary strain on the pump.
The piping anges must be properly aligned with the pump
anges. To check alignment, insert ange bolts through the pipe
and pump ange. If the bolts are easily moved within the bolt
holes and if the ange faces are parallel with each other, the
piping is properly aligned.
All the valves and lters on the suction pipes and discharge
pipes shall be supported independently and secured to avoid
transmitting the stress to the pump body. The ange of the pipes
shall be straightly facing the anges on the pump. Check the
alignment between the pipes and ports by looking at the through
holes on the pipe anges and port anges. If the bolts can move
freely through the holes and the anges are parallel to each other,
then it is deemed that the pipes are aligned.
If the pump is required to operate with suction lift, the suction piping
system must be properly made in relation to the original design.
NOTE: NPSHa of suction piping must be larger than pump’s NPSHr.
The pump cannot be expected to overcome deciencies in the
suction piping system, such as narrow/thin runs of suction piping,
numerous elbows, valves and excessively high points above pipe
suction, etc. In such cases, cavitation will invariably occur and the
pump may not operate at normal capacity.
Pump and pump accessories should be kept apart by valves to avoid
any force while pressure testing or washing the piping system.
PIPING SYSTEM ACCESSORIES
SUCTION STRAINERS
Blackmer suggests that suction strainers be installed on the
suction side of the pump at least temporarily until the new system
is deemed clean of solid residue. The screen area of the strainer
should be as large as possible. Generally, the strainer screen should
be constructed of 40 meshes, and 10 or 20 meshes for high-viscosity
applications. The net screen area should be approximately ve (5)
to eight (8) times the ow cross-sectional area of the suction pipe.
However, if the viscosity of the media is in excess of 200 mm2/s,
then approximately 10 to 20 times the pipe cross-sectional area
is suggested for the net screen area. The maximum dierential
pressure is 0.1 bar (1.5 psig). Install pressure gauges on either side
of the strainer to indicate when the strainer should be cleaned. The
installed strainer should be easy to maintain and clean.
Generally, strainers can be used on all liquids except for those of
an extremely high viscosity. In these cases, the strainer cannot be
installed; therefore, piping and accessory cleaning is mandatory.
CHECK VALVE
If the discharge piping system is subject to a high static head and if
the uid handled ows back into the pump cavity when stopping
the pump, a check valve should be installed. This valve will prevent
hydraulic shock acting upon the pump, and, most importantly, it
allows for separately starting the pump in a parallel connection
system.
PRESSURE RELIEF VALVE
An external pressure relief valve must be installed between the
pump discharge flange and the gate valve (on the discharge pipe
after the discharge port) to protect the pump and the piping
system. The pressure and flow rating should match the working
pressure and flow of the pump, and media through the valve must
return to the suction source.
NOTICE: The pump internal pressure-limiting valve is designed
to protect the pump from excessive pressure and must not be
used as a system pressure control valve.
GAUGES
Proper gauges must be installed to monitor and control the pump
while in operation. A pressure gauge and a vacuum gauge can be
separately installed on the inlet and outlet piping near the pump.

9S SERIES TRIPLE SCREW PUMPS
SECTION 6
INSTALLATION
COUPLING ALIGNMENT
Coupling angle deviation, radial deviation and axial clearance
should be kept at a minimum in order to prevent noises and
vibration and to reduce wear and tear on bearings and couplings.
NOTE: Coupling axial clearance, per specications, should be
within 2 mm to 5 mm (0.08 inch to 0.2 inch). If using special
coupling, please consult with the manufacturer’s specications
and requirements.
If the coupling is misaligned, it will greatly reduce the lifespan
of the coupling, bearing and seal of the pump. Therefore, the
coupling alignment must be carefully checked and calibrated.
The Blackmer pump aggregate (including driver, base-plate and
other accessories) has been aligned (coupling) prior to delivery.
However, stresses caused by lifting, transporting and pipe
connecting can cause minor distortions that will disturb the
alignment. Therefore, realignment should be done while installing
the pump.
Check coupling alignment after the base-plate has been leveled
prior to grouting. After suction and discharge piping is connected,
make a nal pre-startup coupling alignment check. If the product
to be pumped is high in temperature, then, during the rst
operation, a hot coupling alignment should be made once the
pump has reached its operating temperature.
LUBRICATION
Since the internal bearing is lubricated by the media being
pumped, there is no need to lubricate the bearing separately.
The external bearing is lubricated by grease, which can be injected
into the bearing with an oil gun (see Figure 5).
Lithium-based grease (such as ZL-3) is ideally used at -20°C to
120°C (-34°F to 248°F). The lubricating interval is 2,000 hours under
normal working conditions.
Operation without
guards in place can
cause serious personal
injury, major property
damage, or death.
Do not operate
without guard in place.
WARNING
Grease
Injection Port
Figure 5 – Grease Injection Port
FLUSHING THE PUMP
NOTICE: If flushing fluid is to be left in the pump for an extended
time, it must be a lubricating, non-corrosive fluid. If a corrosive or
non-lubricating fluid is used, it must be flushed from the pump
immediately.
1. To flush the pump, run the pump with the discharge valve
open and the intake valve closed. Bleed air into the pump
through the intake gauge plug hole or through a larger
auxiliary fitting in the intake piping. Pump air for 30 second
intervals to clean out most of the pumpage.
2. Run a system compatible flushing fluid through the pump for
one minute to clear out the remainder of the original
pumpage.
3. To remove the flushing fluid, follow step 1 above.
NOTICE: After flushing the pump some residual fluid will remain
in the pump and piping.
NOTICE: Properly dispose of all waste fluids in accordance with
the appropriate codes and regulations.
NOTICE: The pump pressure-limiting valve is designed to protect
the pump from excessive pressure and must not be used as a
system pressure control valve.

S SERIES TRIPLE SCREW PUMPS 10
SECTION 5
OPERATION
PUMP PREPARATIONS
The nal pre-startup check is very important to avoid operational
diculties. Listed below are several key components to be checked
prior to pump operation.
1. Inspect all piping. Check individual piping support; check
for leaks and unnecessary piping strain on the pump; ush
all piping to ensure removal of foreign material from the
system; check that all valves and gauges are functional;
check mesh-size suitability.
2. Ensure pump cavity is lled with pumping media.
3. Check pressure gauges and all other meters.
4. Check all electrical equipment (i.e., cables, control lines and
accessories).
5. Ensure all valves on the suction and discharge lines are open.
6. Check rotation shafts by rotating the coupling by hand to
determine whether the pump shafts and motor shafts turn
freely and rotate smoothly at a uniform speed. If any rubbing
or binding occurs, the cause must be located and corrected
before starting the pump.
7. Check that the motor rotation is correct; refer to the rotation
directional mark located on the pump.
STARTING THE PUMP
1. Open the suction and discharge valves wide in order to keep
the entire piping system unobscured.
NOTE: Ensure that all valves and devices on the suction and
discharge sides are opened before starting the pump.
2. Rotate the coupling by hand to determine if rubbing or
binding occurs.
3. Start motor/driver.
4. The pump must be stopped if there is no capacity after starting.
Restart the pump after several minutes. If there is still no
capacity, the cause must be determined. Please refer to the
Troubleshooting section of this manual for further instruction.
RUNNING THE PUMP
1. Check the pumping unit for unusual noise or vibration. Any
unusual vibration or change in sound must be investigated
and corrected to normal operating conditions.
2. Check bearing housing temperature. Bearing temperature
can safely rise to between 65°C and 75°C (149ºF and 167ºF).
Pumped medium or spot environmental temperature should
be considered when determining whether temperature
exceeds normal operating conditions.
Bearing temperature up to 90°C (194ºF) is considered to be normal.
Within this limit, the stability of the temperature is the best indicator of
normal operation. A sudden increase in temperature indicates that a
bearing problem is developing and the bearing should be checked
immediately.
CAUTION: Do not attempt to measure the temperature by hand!
STOPPING THE PUMP
1. Remove power to the motor to stop the pump.
2. Close the gate valves on the suction and discharge pipes.

11 S SERIES TRIPLE SCREW PUMPS
SECTION 6
TROUBLESHOOTING
Possible pump failures and root causes are listed below. If your pump failure is not included in the list below, or the root cause cannot be
identied, please consult the factory or sales oce.
The pressure must be released and the pump must be drained for troubleshooting.
NO
MEDIA
FLOW
BELOW
CAPACITY
INCONSISTENT
FLOW
INCREASE
IN NOISE OR
VIBRATIONS
EXCESSIVE
TEMPERATURE/
OVERHEATING
SHAFT
DOES NOT
TURN
MOTOR
OVERLOAD TROUBLESHOOTING
• •
The pump was not filled before initial startup.
• Fill the pump with the pumping media.
•
The orientation of the motor is not right.
• Adjust the orientation of the motor.
• • •
Leakage in suction pipe or shaft seal.
• Tighten the anges connection bolts; check the shaft seal.
• • •
Air in the piping system.
• Open the vent on the piping system to remove the air.
• •
The actual viscosity of the media is different from the viscosity
capability of the pump model selection.
• Double-check the viscosity of the media being pumped.
• • •
Pressure valve leaks.
• Check the valve seat or replace the spool.
• •
High vacuum at the suction.
• Reduce the suction height or increase the pipe size at the suction.
•
Motor speed is too low.
• Double-check the voltage and frequency against the nameplates
on the motor.
• • •
Discharge pressure is too high.
• Adjust the set point of the pressure valve
• Reduce the discharge pressure.
•
Foreign matter or impurities in the pump
• Disassemble the pump, remove the foreign matter, grind the
damaged spot; check the suction lter and strainer.
•
Ball bearing is damaged.
• Replace the ball bearing.
• • •
Fatigue of the spring in the pressure valve.
• Replace the spring.
• • •
Spool is locked.
• Repair or replace the spool.
• •
The screws are locked, or the screw is jammed with the balance sleeve.
• Repair or replace.
• • •
The media being pumped losses lubricity at high temperature.
•
Reflex hole is blocked.
• Open up the hole with special tool.
• • • •
Pressure valve is opened.
• Reset the opening pressure of the pressure valve; it should be 10%
higher than the working pressure.
•
Coupling misalignment.
• Adjust the alignment of the coupling per Section 4.3.
NOTICE:
Maintenance shall be performed by qualied technicians only, following the appropriate
procedures and warnings as presented in this manual.

S SERIES TRIPLE SCREW PUMPS 12
SECTION 7
ROUTINE AND PREVENTATIVE MAINTENANCE
Routine checks and maintenance will extend the lifespan of the
pump and motor.
ROUTINE MAINTENANCE
• Ensure that the pump is never running dry
• Ensure that the motor is not overloaded
• Check for leakage on the suction and discharge pipes as this
would prevent air from entering the piping
• Check for mechanical seal leakage
• Monitor the reading on the thermometer and pressure
gauges
• GROUND RESISTANCE TESTING: Check the groundings
of the motor case and pump base-plate; the grounding
resistance must be equal to or less than 1. Ground
resistance testing is to be performed every three months.
INDIVIDUAL PART MAINTENANCE
BEARING AND LUBRICATION
The sliding bearing is lubricated by the pumped media; no
maintenance is required. The lifespan of the sliding bearing is
designed based on the lifespan of the pump under average
working conditions; however, the lifespan may decrease
depending on the amount of foreign materials contained in the
media being pumped.
The internal deep-groove ball bearing is also lubricated by the
media being pumped.
However, the external deep-groove ball bearing is lubricated by
grease injected from the grease injection port, which is added on
a regular basis. The bearing without the grease injection port does
not require maintenance. Under normal working conditions, the
designed lifespan of the deep groove ball bearing is 25,000 hours.
The actual lifespan of the bearing may be shorter than the designed
lifespan due to non-continuous operation, high temperature,
low viscosity media or media with poor lubricity. Therefore, it
is suggested to check the noise and temperature at the bearing
regularly. Abnormal noise or obvious temperature rise indicates
the bearing is damaged. If this is the case, the bearing must be
checked or replaced as soon as possible.
NOTICE:
Maintenance shall be performed by qualied technicians
only, following the appropriate procedures and warnings
as presented in this manual.
Hazardous machinery
can cause serious
personal injury.
WARNING Failure to disconnect and
lockout electrical power
or engine drive before
attempting maintenance
can cause severe
personal injury or death.
Hazardous or toxic
uids can cause
serious injury.
WARNING If pumping hazardous or
toxic uids, system must
be ushed and
decontaminated, inside
and out, prior to
performing service or
maintenance.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Disconnecting uid or
pressure containment
components during
pump operation can
cause serious personal
injury, death or major
property damage.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Failure to relieve system
pressure prior to
performing pump service
or maintenance can
cause serious personal
injury or property
damage.
Hazardous voltage.
Can shock, burn or
cause death.
WARNING Failure to disconnect and
lockout electrical power
before attempting
maintenance can cause
shock, burns or death.
Do not operate
without guard in place.
WARNING Operation without
guards in place can
cause serious personal
injury, major property
damage, or death.
Heavy assemblies can
cause personal injury or
property damage.
CAUTION Always use a lifting
device capable of
supporting the full
weight of the pump
assemblies.

MECHANICAL SEAL
The leakage of non-volatile media due to commissioning is
allowed. However, if serious leakage occurs, the mechanical seal
must be replaced. Other types of seals do not require maintenance.
NOTE: Dry running of the pump may damage the mechanical
seal; therefore, ensure the pump is lled with liquid and the air is
removed from the pump prior to startup.
FILTER
The lter must be cleaned regularly to ensure that the pressure
drop between suction and discharge of the lter is less than 0.01
MPa (1.45 psig).
Toxic or hazardous and/or polluting media must be drained and
collected using the appropriate safety measures.
The strainer of the lter should be cleaned in a bath of detergent.
Toxic detergents should only be used under the conditions
meeting the safety requirements.
NOTE: The strainer must be soaked in a detergent solution;
otherwise, the dirt will pollute the lter that is being cleaned.
After cleaning, the detergent must be completely removed from
the lter and the lter dried with compress air.
The concentration of the detergent solution depends on the
nature and stickiness of the dirt.
A soft brush may also be used to clean the strainer. However, it is
suggested to replace the strainer if it is blocked.
COUPLING (EXCLUDING MAGNETIC COUPLING)
Regularly check and maintain the coupling elastomer; replace a
worn elastomer, if necessary.
ROUTINE AND PREVENTATIVE MAINTENANCE
13 S SERIES TRIPLE SCREW PUMPS

S SERIES TRIPLE SCREW PUMPS 14
SECTION X
Where Innovation Flows

15 S SERIES TRIPLE SCREW PUMPS
SECTION X
SECTION HEADER GOES HERE
blackmer.com
Disassembly
& Reassembly
SECTION 8
DISASSEMBLY & REASSEMBLY
S SERIES
Triple Screw Pumps
Where Innovation Flows

S SERIES TRIPLE SCREW PUMPS 16
SECTION 8 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 9 3N / 3M SERIES PUMPS GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 19
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
REASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
CROSSSECTIONAL DIAGRAMS
3NH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PARTS LISTS 3NH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CROSSSECTIONAL DIAGRAMS
3MH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
PARTS LISTS 3MH PUMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DISASSEMBLY & REASSEMBLY
TABLE OF CONTENTS
Blackmer pump manuals and parts lists may be obtained from the Blackmer website (blackmer.com) or by contacting Blackmer Customer Service.

17 S SERIES TRIPLE SCREW PUMPS
SECTION 8
INTRODUCTION
INTRODUCTION
The following instructions have been divided into three sections to accommodate the dierent triple screw pump types: 3N and 3M.
All disassembled parts must be labeled immediately in order to avoid confusion during reassembly. After disassembling the screw pump,
all parts must be cleaned thoroughly and checked to ensure that they are reusable. Before reassembly, the surfaces of the individual
parts should be carefully cleaned and checked.
The following parts should not be reused for operational safety reasons:
• Gaskets
• O-rings
• Mechanical seal
• Bearing
This is a SAFETY ALERT SYMBOL.
When you see this symbol on the product, or in the
manual, look for one of the following signal words and
be alert to the potential for personal injury, death or
major property damage.
Warns of hazards that WILL cause serious
personal injury, death or major property
damage.
Warns of hazards that CAN cause serious
personal injury, death or major property
damage.
Warns of hazards that CAN cause personal
injury or property damage.
NOTICE:
Indicates special instructions which are very important and must be followed.
WARNING
DANGER
CAUTION
NOTICE:
Blackmer Power Pumps MUST only be installed in systems, which
have been designed by qualied engineering personnel. The sys-
tem MUST conform to all applicable local and national regula-
tions and safety standards.
This manual is intended to assist in the installation and operation
of Blackmer Power pumps, and MUST be kept with the pump.
Pump service shall be performed by qualied technicians ONLY.
Service shall conform to all applicable local and national regula-
tions and safety standards.
Thoroughly review this manual, all instructions and hazard warn-
ings, BEFORE performing any work on the pump.
Maintain ALL system and pump operation and
hazard warning decals.
NOTICE:
Maintenance shall be performed by qualied technicians
only, following the appropriate procedures and warnings
as presented in this manual.
Hazardous machinery
can cause serious
personal injury.
WARNING Failure to disconnect and
lockout electrical power
or engine drive before
attempting maintenance
can cause severe
personal injury or death.
Hazardous or toxic
uids can cause
serious injury.
WARNING If pumping hazardous or
toxic uids, system must
be ushed and
decontaminated, inside
and out, prior to
performing service or
maintenance.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Disconnecting uid or
pressure containment
components during
pump operation can
cause serious personal
injury, death or major
property damage.
Hazardous pressure can
cause personal injury or
property damage.
WARNING Failure to relieve system
pressure prior to
performing pump service
or maintenance can
cause serious personal
injury or property
damage.
Hazardous voltage.
Can shock, burn or
cause death.
WARNING Failure to disconnect and
lockout electrical power
before attempting
maintenance can cause
shock, burns or death.
Do not operate
without guard in place.
WARNING Operation without
guards in place can
cause serious personal
injury, major property
damage, or death.
Heavy assemblies can
cause personal injury or
property damage.
CAUTION Always use a lifting
device capable of
supporting the full
weight of the pump
assemblies.

S SERIES TRIPLE SCREW PUMPS 18
ECTION X
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
This manual contains basic references that are to be observed
during pump transportation, installation, operation and
maintenance, and, therefore, should be kept as part of the
permanent pump records and readily accessible as a reference to
any person working or maintaining the pumping unit.
The instructions within this manual must be thoroughly reviewed
in their entirety and fully understood prior to pump installation,
operation or maintenance care.
These pumps have been designed for safe and reliable operation
when properly used and maintained in accordance with the
instructions contained within this manual. A pump is a pressure-
containing device with rotating parts that can be hazardous. Failure
to read and comply with installation, operation and maintenance
instructions will void the responsibility of the manufacturer and
may result in bodily injury or equipment damage.
NOTE: In addition to the Safety Precautions identied in this
section, special safety information is included within proceeding
chapters where appropriate.
Markings and Instructions on Pump Unit
Direct instructional references regarding direction of rotation,
uid-ow orientation, safety warning, etc., are clearly marked on
the pump. Please observe and follow all indicated safety markings
and instructions.
NOTE: Failure to observe safety references can result in the
following dangers:
• Equipment failure
• Maintenance and service policies voided
• Environmental pollution due to hazardous-substance leakage
• Personal endangerment by subject of electrical, mechanical
and chemical inuences
Qualied Personnel and Training
All persons installing, operating, maintaining and inspecting the
pumping unit must have the required qualications for work
to be performed. All instructions and safety markings must be
observed, understood and adhered to by all personnel working
on or around the pumping unit. If installation or operational
knowledge is inadequate, training must be provided. The scope
of the personnel responsibilities, competency and supervisory
duties must be closely controlled by the customer.
Safety References for Customers
• All work performed on or around the pumping unit must be
completed by qualied personnel.
• Machine components that are either hot or cold must be
protected on-site to prevent personal endangerment.
• Safety shield on the pumping unit must not be removed from
the machine while the pump is running.
• Leakage of hazardous media (i.e., toxic, ammable, explosive,
etc.) must be collected in a way that no damage to personnel
or environment occurs.
• If the pumped media is explosive, toxic or ammable, a
warning or alarm device must be installed, pump casing must
be well-ventilated and the operating site must be a no smoke/
re zone.
• To prevent electrical damage, all electrical devices must be
safely protected, functional and controlled.
Pump Operating Parameters
Unless there is written admission by S Series, the pump must not
be operated at higher parameters than specied. Adhering to
these specications prevents danger to personnel and equipment
damage.
Pump Monitoring
Suitable measuring devices must be installed to inspect and
control the pump during operation. Generally, pressure gauges
are to be installed on suction and discharge lines near the pump.
TORQUE VALUES BY BOLT SIZE
Fastener Size M5 M6 M8 M10 M12 M16 M20 M24 M30 M36
Torque (Nm) 2 4 8 15 26 64 120 210 430 740