moyno 1000 User manual

SERVICE MANUAL
MOYNO®
1000 Pumps

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. Suction Piping………………… 2
2-5. Discharge Piping………………2
2-6. FOUNDATION……………………………2
2-7. SHAFT ALIGNMENT…………………….2
2-8. Coupling Connected Units……3
2-9. Belt Drive Units………………..3
3-1. OPERATION…………………………………….. 3
3-2. INITIAL CHECK…………………………..3
3-3. START-UP………………………………..3
3-4. PACKING LEAKAGE…………………….3
4-1. MAINTENANCE……………………………………3
4-2. GENERAL…………………………………3
4-3. PACKING ADJUSTMENT……………….3
4-4. PACKING REPLACEMENT……………. 4
4-5. BEARING LUBRICATION…………….…4
4-6. DRIVE SHAFT AND ROTOR-
EXTENDED LIFE PROVISION….……...4
4-7. DISASSEMBLY………………………….. 4
4-8. Disconnect Pump………….…. 4
4-9. Stator Removal………………..4
4-10. Suction Chamber Removal…..5
4-11. Rotor Removal………………...5
4-12. Connecting Rod or Auger
Assembly Removal ………….. 5
4-13. Packing Removal……………...5
4-14. Drive Shaft Removal………… 5
4-15. Bearing Removal……………...6
4-16. Gearbox/Gearmotor Removal. 6
4-17. CLEANING………………………………6
4-18. INSPECTION……………………………6
4-19. Bearings………………………..6
4-20. Drive Shaft and Intermediate
Shaft…………………………….6
4-21. Seals…………………………...6
Page
4-21a. Mechanical Seals…………….. 7
4-22. Packing…………………………. 7
4-23. Rotor…………………………….. 7
4-24. Stator……………………………. 7
4-25. All Other Parts………………….. 7
4-26. ASSEMBLY………………………………7
4-26a. One-Piece Shaft-
Ball Bearing Models…………...7
4-26b. One-Piece Shaft-
Tapered Roller Bearing Models.7
4-27. Two-Piece Shaft Models……………….8
4-27a. Ball Bearing Models…………... 8
4-27b.Tapered Roller Bearing Models.8
4-28. Close-Coupled Models…………………8
4-29. Adjusting Bearing End Play …....8
4-30. Shaft Installation…………………8
4-30a. Single Mechanical Seal... 9
4-30b. Double Mechanical Seal. 9
4-31. Connecting Rod or Auger
Assembly…………………………9
4-32. Suction Chamber……………… 10
4-33. Stator……………………………...10
4-34. Stator/Support/Discharge
Flange Assembly………………. 10
4-35. Packing…………………………...10
4-36. Pump Connections………………10
4-37. STORAGE……………………………… 10
4-37a. Short-Term Storage……………10
4-37b. Long-Term Storage…………….11
4-38. STANDARD PACKING
SPECIFICATION…………………… 11
4-39. RECOMMENDED SPARE PARTS….. 11
4-40. HOW TO ORDER SPARE PARTS…...11
4-41. STANDARD HARDWARE LIST-
STANDARD AND OPEN THROAT
MODELS………………………………..12
4-42. STANDARD HARDWARE LIST-
CLOSE-COUPLED MODELS………. 13
4-43. EXPLODED VIEWS…………………… 13
4-44. Standard Model-Ball Bearing
Design Drive End……………… 13
4-45. Standard Model-Roller Bearing
Design Drive End……………… 14
4-46. Close-Coupled Models………….15
4-47. Open Throat Models…………….16
4-48. PARTS LIST……………………………. 18
4-59. TROUBLESHOOTING CHART……….28

SERVICE MANUAL
MOYNO1000 PUMPS
1-1. INTRODUCTION
1-2. GENERAL
The Moyno 1000 pump is the most versatile positive
displacement pump available. Its design parameters
have been proven in thousands of applications over the
past 60 years, and it is backed by this same half
century-plus of experience in application and
manufacturing know-how.
The Moyno 1000 pump is a progressing cavity pump.
The pumping action is created by a single helical rotor
rolling eccentrically in the double-threaded helix of the
stator. 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 standard, close-
coupled, and open throat configurations of the Moyno
1000 pump line. Disassembly and assembly procedures
are also covered in this manual.
1-4. NAMEPLATE DATA
The pump nameplate, located on the bearing housing,
or drive adaptor, 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. To facilitate parts ordering, the
nameplate data for your pump has been recorded
on the nameplate drawing on the front cover of this
manual.
1-5. Pump Rotation. The direction of rotation is
indicated by a rotation arrow on the nameplate.
Standard rotation of Moyno 1000 pumps is clockwise,
when viewed from the driven end of the pump. Close-
coupled models only, are not to be run in reverse.
1-6. Model Number. The pump model number is a
series of letters and numbers which identifies the
pump’s basic design and materials of construction. A
typical model number, for example, might be A2E
CDQ3AAA, as shown on the nameplate in Figure 1-1.
Figure 1-1. Typical nameplate showing rotation arrow, model, and
manufacturing serial numbers.
The first three letters and numbers identify the pump’s
basic design characteristics.
In the first space, a letter designates the pump type.
Letters used and their corresponding design types are as
follows:
A = Standard D = High Abrasion, Standard
B = Close-coupled E = High Abrasion, Close-coupled
C = Open throat
The second position number identifies the number of
stages in the pumping elements. This will generally be a 1,
2, or 4.
The third position is a letter, A through K, which identifies
the pump’s capacity in terms of gallons (gal.) per 100
revolutions. Sometimes the third position is followed by the
letter “E” which denotes the pumping element is our Ultra
Pro 23 geometry.The letters, with their corresponding
capacities, are:
A – .38 gal./100 revs. G – 22.0 gal./100 revs.
B – .75 gal./100 revs. H – 36.0 gal./100 revs.
C – 1.5 gal./100 revs. J – 48.0 gal./100 revs.
D – 3.0 gal./100 revs. K – 62.0 gal./100 revs.
E – 6.0 gal./100 revs. L – 115.0 gal./100 revs.
F – 12.0 gal./100 revs.
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 chamber casting.
The second letter indicates the material used in the
rotating parts, i.e., the drive shaft, connecting rod, rotor,
Section:
MOYNO1000 PUMPS
Page: 1
Date: April 2002

*Teflon is a registered trademark of E.I. duPont de Nemours & Co., Inc.
2
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.
A typical 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, connecting rod, pins, and rotor
Q = Nitrile (NBR) stator (70 durometer hardness)
The following letters identify the materials used in
standard construction:
C = Cast iron
D = Hardened alloy steel
S = Stainless steel, Type 316
Q = Nitrile (NBR), 70 durometer hardness
B = EPDM
F = Fluoroelastomer
The next position is a number identifying the current
pump revision, this manual corresponds to revision 3.
The last three letters indicate the trim code and
denote internal variations in a pump. The first letter
identifies sealing variations. The second letter indicates
internal variations. The third letter indicates rotor
variations.
A typical trim code is AAA, designating the following:
A = Standard black packing
A = Standard plated shaft
A = Standard size chrome-plated rotor
The variations available are:
Sealing:
A – Standard black packing
C – Teflon7 white packing (not food grade)
S – single mechanical seal
D – Double mechanical seal
Internal variations:
A – Standard plated shaft
B – Non-plated shaft
P – Two-piece shaft or pinned close coupled
Rotor variations:
A – Standard plated rotor
B – Non-plated rotor
C – Standard undersize
E – Standard oversize
X – Special to order
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
2-4. 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.
2-5. Discharge piping diameter should generally be as
large as the discharge port unless fluid conditions indicate
otherwise.
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.
2-6. 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 1 HP.
2-7. SHAFT ALIGNMENT
After the base has been bolted down to the foundation,
check the following conditions:
2-8. Coupling connected units. Be sure that the pump
and drive shafts are aligned before the coupling is
connected. Care should be exercised to ensure that all
components are level and mounted in a direct line.
Check the gap between coupling halves (refer to coupling
manufacture’s recommendations). Adjustment can usually
be made by loosening the mounting bolts on either the
pump or driver and moving the loosened component into
alignment with the fixed component. Do not use a hammer!
On couplings with equal diameter hubs, it may be helpful to
lay a straight edge across the coupling halves to check
alignment.
2-9. Belt drive units. Be sure that sheaves or sprockets
are in alignment. Check belts for proper tension. Tension
requirements will vary with type of belt, center distances,
and belt speeds. Consult belt manufacturer for specific
recommendations.

3
3-1. OPERATION
3-2. INTIAL CHECK
Before putting the pump into operation, the following
items should be checked to ensure that each piece of
equipment is installed correctly:
-Pump, driver, coupling, or sheave alignment.
-Electrical connections.
-Gauges and other instruments.
-Pump rotation. Rotation is indicated on the pump
nameplate.
-Belt tension on belt driven units. There should be no
appreciable deflection when first starting up.
-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 stator is lubricated by the
liquid which is being pumped.
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 1000 pump has been designed for a
minimum of maintenance, the extent of which is routine
adjustment of the packing, and infrequent lubrication of
the bearings in tapered roller bearing models. The pump
is one of the easiest to work on 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 Retainer
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 Service
Distributor.