moyno 2000 CC User manual

MOYNO®
2000CCPumps
SERVICE MANUAL

TABLE OF CONTENTS
Page
1-1. INTRODUCTION...............................................................................................................................................1
1-2. General..................................................................................................................................................1
1-3. Scope ....................................................................................................................................................1
1-4. Nameplate Data.....................................................................................................................................1
1-5. Pump Rotation.......................................................................................................................................1
1-6. Model Number.......................................................................................................................................1
2-1. INSTALLATION................................................................................................................................................2
2-2. General..................................................................................................................................................2
2-3. Piping.....................................................................................................................................................2
2-4. Foundation.............................................................................................................................................2
3-1. OPERATION ...................................................................................................................................................2
3-2. Initial Check...........................................................................................................................................2
3-3. Start-up..................................................................................................................................................2
3-4. Packing Leakage...................................................................................................................................2
4-1. MAINTENANCE................................................................................................................................................2
4-2. General..................................................................................................................................................2
4-3. Packing Adjustment...............................................................................................................................2
4-4. Packing Replacement............................................................................................................................3
5-1. DISASSEMBLY ................................................................................................................................................3
5-2. Disconnect Pump...................................................................................................................................3
5-3. Stator Removal......................................................................................................................................3
5-4. Suction Housing Removal .....................................................................................................................3
5-5. Rotor/Con Rod/Drive Shaft Assembly Removal ....................................................................................3
5-6. Packing Housing Removal......................................................................................................................4
5-7. Seal Housing Removal...........................................................................................................................4
5-8. Rotor, Driveshaft, and Connecting Rod Disassembly.............................................................................4
5-9. Drive Adapter/Gearmotor Removal........................................................................................................4
5-10. Cleaning ...............................................................................................................................................4
6-1. INSPECTION ....................................................................................................................................................4
6-2. Drive Shaft and Packing/Seals ..............................................................................................................4
6-3. Rotor......................................................................................................................................................4
6-4. Stator.....................................................................................................................................................4
6-5. All Other Parts .......................................................................................................................................4
7-1. ASSEMBLY ......................................................................................................................................................5
7-2. Lubrication During Assembly.................................................................................................................5
7-3. Driveshaft and Rotor Gear Joint Assembly............................................................................................5
7-4. Drive Adapter Assembly........................................................................................................................5
7-5. Pumps with Single Mechanical Seal......................................................................................................5
7-6. Pumps with Compression Packing ........................................................................................................6
7-7. Pumps with Double or Cartridge Mechanical Seals...............................................................................6
7-8. Suction Housing/Stator Assembly..........................................................................................................6
7-9. Pump Connections.............................................................................................................................................. 6
8-1. STORAGE.........................................................................................................................................................6
9-1. RECOMMENDED SPARE PARTS...................................................................................................................6
10-1. HARDWARE LIST – BB022 thru BA175.........................................................................................................7
10-2. HARDWARE LIST – BA220 thru BC345...........................................................................................................8
11-1. PARTS LIST – BB022 thru BA175 ..................................................................................................................9
11-2. PARTS LIST – BA220 thru BC345..................................................................................................................10
12-1. EXPLODED VIEW ..........................................................................................................................................11
13-1. SEAL SET DIMENSIONS...............................................................................................................................12
14-1. TROUBLESHOOTING CHART ......................................................................................................................13

SERVICE MANUAL
MOYNO®2000 CC PUMPS
1-1. INTRODUCTION
1-2. GENERAL
The Moyno 2000 pump is a progressing cavity pump. A single
helical rotor rolling eccentrically in the double-threaded helix of
the stator creates the pumping action. In its revolution, the rotor
forms, in conjunction with the stator, a series of sealed cavities
180 degrees apart. As the rotor turns, the cavities progress from
the suction to the discharge. As one cavity diminishes, the
opposing cavity increases at exactly the same rate. Thus, the
sum of the two discharges is a constant volume. The result is a
pulsationless, positive displacement flow.
1-3. SCOPE
This service manual covers the installation and maintenance
requirements for standard, close-coupled configuration of the
Moyno 2000 pump line. Disassembly and assembly procedures
are also covered in this manual.
1-4. NAMEPLATE DATA
The pump nameplate, located on the drive adapter, contains
important information relative to the operation and servicing of
the pump. This information includes the direction of rotation
arrow and the pump model and serial numbers.
The model and serial numbers must be used when ordering
spare parts.
1-5. Pump Rotation. A rotation arrow on the nameplate
indicates the direction of rotation. Standard rotation of Moyno
2000 pumps is clockwise, when viewed from the driven end of
the pump.
1-6. Model Number. The pump model number is a series of
numbers and letters, which identifies the pump’s basic design
and materials of construction. A typical model number, for
example, might be 1BB065CDQ3SA1AAAC, as shown on the
nameplate in Figure 1-1.
Figure 1-1. Typical nameplate showing rotation arrow,
model, and manufacturing serial numbers.
The first six numbers and letters identify the pump’s basic
design characteristics.
In the first space, a number identifies the number of stages
in the pumping elements. This will generally be a 1 or 2.
The second position, the letter “B”, designates the pump
type as being close-coupled.
In the third position, a letter designates the pump’s drive
train (con rod/gear joint/drive shaft):
A – One size smaller than element (175/220 only)
B – Same size as element
C – Same size as element, but larger gearbox drive
flange and drive shaft size (175/220/345 only)
The next three positions, always numbers, identify the pumping
element in terms of theoretical gallons per 100 revolutions.
The next 3 positions, always letters, describe the pump’s
“materials of construction” in component groups of parts.
The first letter in this group identifies the material of the
suction housing casting.
The second letter indicates the material used in the rotating
parts, i.e., the drive shaft, con rod, rotor, and other metallic
parts in contact with the material being pumped.
The third letter indicates the material of the stator. It
identifies only the stator material and not that of the tube in
which the stator is placed. The tube, a non-wetted part, is
always alloy steel.
The standard designation such as the CDQ used in our
example would result in the following:
C = Cast iron suction chamber
D = Hardened alloy steel internals including drive shaft,
con rod, gear joint, and rotor
Q = Nitrile (NBR) stator (70 durometer hardness)
The next position is a number identifying the current pump
revision. This manual corresponds to Revision 3.
The next three letters indicate the sealing system of the
pump. The first letter identifies whether packing, a single
seal, or a double seal is being used. The second and third
positions indicate specific seal or packing model and type
used.
A typical trim code is SA1, designating the following:
S = Single mechanical seal
A1 = John Crane type 2100 SiC/SiC/Viton/316
The next letter indicates rotor variations. The most common
designation is an A for standard size, chrome plated. Other
options are available including special coatings, undersizes,
and oversizes.
Section:
MOYNO®2000 PUMPS
Page: 1
Date: July 2005

Page 2
The next letter indicates whether there are any special options
being used in the pump, typically this is an A for no special
options.
The next letter indicates the suction configuration. For this
pump an A is used designating a standard flanged pump.
The last letter indicates the drive configuration and
flange/shaft/seal size. In our close coupled pump nameplate
the C designates a 250mm flange and 45mm shaft.
2-1. INSTALLATION
2-2. GENERAL
Accessibility to the pump and adequate clearance should be
prime considerations in any installation. Enough space should
surround the unit so that maintenance can be performed with
ease.
2-3. PIPING
1. Suction piping should be as short as possible. Normally,
the suction line should be the same diameter as the pump
suction; however, conditions such as high viscosity or
required minimum flow velocities may dictate otherwise.
Long-sweep 90-degree elbows or 45-degree elbows should
be used instead of the standard elbow. Avoid using suction
piping loops, which trap air.
2. Discharge piping diameter should generally be as large as
the discharge port unless fluid conditions indicate
otherwise.
3. An easily removable section of piping, at least twice as long
as the stator, should be mated to the discharge port. This
will allow the rotor and stator to be removed without having
to remove the complete pump from the base.
2-4. Foundation. For maximum pump-driver unit life, each unit
should be mounted on a strong steel baseplate. The baseplate
should be mounted on a firm foundation. The motors should be
supported on close-coupled configurations above 30 HP.
3-1. OPERATION
3-2. INITIAL CHECK
Before putting the pump into operation, the following items
should be checked to ensure that each piece of equipment is
installed correctly:
•Electrical connections.
•Gauges and other instruments.
•Pump rotation. Rotation is indicated on the pump
nameplate.
•All valves should be open on both suction and discharge
sides of pump.
•Seal flush systems if required should be operational.
Double seals require flushing between faces.
CAUTION: This is a positive displacement pump. Do not
operate it against a closed valve.
3-3. START-UP
CAUTION: DRY OPERATION IS HARMFUL TO THE PUMP!
Never allow the pump to operate without liquid, as dry
operation will cause premature wear of the stator and
possible damage. The liquid being pumped lubricates
the stator.
1. Before operating the pump for the first time, fill it with
liquid to lubricate the stator for the initial start-up.
Note: If the pump is shut down temporarily, enough liquid
will remain in the system to provide lubrication upon
restarting. It is advisable to maintain the suction piping
at a higher elevation than the centerline of the pump in
order to contain some liquid in the pump at time of
shutdown.
2. Once the pump has been filled with liquid, check for
direction of pump rotation by momentarily starting and
stopping the drive. See pump nameplate for correct
rotation.
3. Start seal flush water if so equipped.
4. Start pump.
3-4. Packing Leakage. The packed stuffing box is designed
to control leakage, not stop it completely. Leakage is
necessary to reduce friction and dissipate heat.
In a new pump, before the packing has had a chance to seat
properly, excessive leakage through the stuffing box is
common. Frequent adjustments of the packing gland may be
necessary during the first few hours of operation in order to
compress and seat the packing. See Section 4-3.
4-1. MAINTENANCE
4-2. GENERAL
The Moyno 2000 CC pump has been designed for a
minimum of maintenance, the extent of which is routine
adjustment of the packing. The pump is one of the easiest to
maintain because the main elements are very accessible and
require few tools to disassemble.
4-3. Packing Adjustment. Packing gland nuts (see Figure
4-1) should be evenly adjusted. Overtightening the packing
gland may result in premature packing failure and possible
damage to the shaft and gland.
Figure 4-1. Cross Section of Packing Housing

When packing is new, frequent minor adjustments during the
first few hours of operation are recommended in order to
compress and seat the packing.
1. Upon initial start-up of the pump, adjust the gland nuts for
a leakage rate of 50-100 drops per minute until the
packing has seated and adjusted to the operating
temperature (approximately 10-15 minutes).
2. If leakage is excessive after 15 minutes of operation,
tighten the gland nuts ¼ of a turn.
3. Tighten the gland nuts ¼ of a turn after an additional 15
minutes if necessary and repeat this procedure until a
desired leakage of 1-2 drops per minute is obtained.
Adding grease may also reduce leakage by providing a
barrier at the lantern ring.
CAUTION: Do not tighten until zero leakage is obtained.
Overtightening the packing gland may result in accelerated
wear on the packing and damage to the shaft. In those
situations where no packing leakage can be tolerated, consult
your Moyno Authorized Representative.
Area To Lubricate Approved Lubricant or
Equivalent
Packing ACG-2
(Dubois Chemical, Inc.)
4-4. PACKING REPLACEMENT
Note: In this section, the first reference to each pump part will
be followed by a number or a letter in parentheses ( ). These
numbers and letters are used to identify the pump parts and
hardware items in the Exploded Views in Section 13-1.
When tightening the gland nuts can no longer regulate leakage,
remove and replace the packing. The entire pump does not
need to be disassembled to replace the packing. Briefly, replace
as follows:
1. Remove packing gland nuts and slide gland halves (152)
back along drive shaft (400).
2. Use a packing puller tool (see Figure 4-2) to remove the
packing (150).
Figure 4-2. Packing Removal Tool
3. Inspect surface of drive shaft for excessive wear or grooves
due to packing rub. If shaft is worn, or is badly scored or
grooved, it should be replaced.
4. If drive shaft is not worn, install a lantern ring and four
packing rings, lubricating them before installation with a
good grade of packing grease. Be sure to stagger the
packing ring joints at 90-degree increments.
Note: The stuffing box is supplied with four rings installed, a fifth
ring may be added after initial compression.
CAUTION: ALWAYS USE A PROPER PACKING TAMPER
TOOL TO INSTALL PACKING. Do not use a pointed or sharp
tool, as damage to the packing material or drive shaft could
result. To assure proper shaft lubrication, never use a one-piece
spiral wrap packing.
5. Replace packing gland halves and secure with packing
gland and nuts (156).
Page 3
6. Adjust packing per Section 4-3.
5-1. DISASSEMBLY
Note: In this section and in following sections on CLEANING,
INSPECTION, and ASSEMBLY, the first reference to each
pump part will be followed by a number or letter in
parentheses ( ). These numbers and letters are those used to
identify the pump parts and hardware items in the Exploded
Views in Section 13-1.
5-2. DISCONNECT PUMP
1. Disconnect the power source.
2. Close suction and discharge valves to isolate the pump
from the line.
5-3. STATOR REMOVAL
1. Remove section of discharge pipe attached to discharge
flange (200).
2. Remove discharge flange by unbolting from stator clamp
ring (210) and remove stator gasket (510). Use a
screwdriver tip to remove stator retaining ring (480), stator
clamp ring (210), and pump support (220) from stator
(500).
3. Unbolt stator clamp ring (210) from suction housing and
remove stator from rotor (turning stator clockwise while
removing will ease disassembly). Remove the stator
retaining ring. Remove stator clamp ring from stator. See
Figure 5-1. for the typical retaining ring removal procedure.
Figure 5-1. Typical Retaining Ring Removal
5-4. SUCTION HOUSING REMOVAL
1. Remove four bolts and lock washers (230) holding the
suction housing (100) to the drive adapter (10).
2. Pull the suction housing toward the rotor and away from
the adapter housing. Place a block of wood under the
suction housing to prevent it from dropping as you pull it
away from the adapter housing.
5-5. ROTOR/CON ROD/DRIVE SHAFT ASSEMBLY
REMOVAL
1. Slide the slinger ring (60) along the drive shaft (400),
towards the gear reducer, exposing the drive pin (70).
2. With a punch and hammer, tap the drive pin from the
drive shaft.
3. Carefully pull the rotor/con rod/drive shaft assembly from
the gear reducer. Place the assembly aside for now. On
larger sizes where it may be awkward to remove the
whole rotating unit as one piece, the rotor can be remove
first. Refer to section 5-8 for joint disassembly
instructions.