moyno 300 Series User manual

Section:
Mag Drive 500 Pumps
Page: 1 of 4
Date: January 2010
DESIGN FEATURES
Housing: PVC or Non-Metallic
Pump Rotor: Titanium
Pump Stator: FPM, NBR (Nitrile), EPDM
Seal: Sealless design
Motor Shaft: Hardened Carbon Steel
Motor: .5 and 1 HP, 60 Hz, 1750 RPM, totally
enclosed fan cooled (TEFC), C-Faced,
3 Ph, 230/460V (other motor
options available; consult sales
representative)
INSTALLATION
Mounting Position. Pump may be mounted in any
position.
Pre-Wetting. Prior to connecting pump, wet pump
elements by adding fluid to be pumped into suction and
discharge ports. Turn pump over several times in a
clockwise direction to work fluid into pump elements.
Piping. Piping to pump should be self-supporting to avoid
excessive strain on pump housings. See Table 1 for
suction and discharge port sizes of each pump model. Use
pipe “dope” or tape to facilitate disassembly and to provide
seal on pipe connections.
Electrical. Follow the wiring diagram on the motor
nameplate or inside the terminal box for the proper
connections. The wiring should be direct and conform to
local electrical codes. Check power connections for proper
voltage. Voltage variations must not exceed ±10% of
nameplate voltage. Motor is provided with internal
automatic overload protection.
To prevent damage to pump, pump rotation must be
clockwise when facing pump from motor end.
OPERATION
DO NOT RUN DRY. Unit depends on liquid pumped for
lubrication. For proper lubrication, flow rate should be at
least 10% of rated capacity.
Pressure and Temperature Limits. See Table 1 for
maximum discharge pressure of each model. Temperature
limit for any application cannot exceed 140°F.
Caution: Suction pressure should never be greater than
discharge pressure.
Table 1. Pump Data
Pump
Model
Suction
Port
(NPT)
Discharge
Port
(NPT)
Voltage
Rating
(VAC)
Discharge
Pressure
(psig)
Mag 331 1” 3/8” See Motor Nameplate
For Voltage Ratings 100
Mag 332 1” 3/8” See Motor Nameplate
For Voltage Ratings 80
Mag 333 1” 3/8” See Motor Nameplate
For Voltage Ratings 50
Mag 344 1” 3/8” See Motor Nameplate
For Voltage Ratings 40
TROUBLESHOOTING
WARNING: Before making adjustments, disconnect
power source and thoroughly bleed
pressure from system prior to disassembly.
Failure to do so could lead to electric shock
or serious bodily harm.
Failure to Pump.
1. Motor will not start: Check power supply. Voltage must
be ± 10% of nameplate rating when motor is in locked
rotor condition.
SERVICE MANUAL
Moyno®Mag Drive 500
300 Series Motorized Pumps with
Magnetic Drives
331, 332, 333, 344 MODELS

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2. Stator torn; possible excessive pressure: Replace
stator; check pressure at discharge port.
3. Wrong rotation: Rotation must be clockwise when
facing pump from motor end. Reverse the connections
of any two line leads to the motor.
Pump Overloads.
1. Excessive discharge pressure: Check pressure at
discharge port for maximum ratings given in Table 1.
2. Fluid viscosity too high: Limit fluid viscosity to 700 CP
or 3700 SSU.
Noisy Operation.
1. Suction line too small: Check pipe size. Be sure lines
are free from obstructions.
2. Pump cavitates: Pump speed is 1750 RPM. Viscosity
of fluid should not exceed 700 CP or 3700 SSU.
3. Insufficient mounting: Mount to be secure to a firm
base. Vibration induced noise can be reduced by
using mount pads and short sections of hose on
suction and discharge ports.
Magnet De-Coupling.
1. High torque due to excessive pressure. Turn the pump
off and restart it. If magnet is still de-coupled, bleed
the pressure from the discharge. If problem persists,
disassemble unit and inspect parts.
2. High torque due to high viscosity product. Turn the
pump off, flush it with water. Check the viscosity of the
product that is being pumped. Viscosity of fluid should
not exceed 700 CP or 3700 SSU.
PUMP DISASSEMBLY
WARNING: Before disassembling pump, disconnect
power source and thoroughly bleed
pressure from system. Failure to do so
could result in electric shock or serious
bodily harm.
The magnets used to drive this pump are
powerful. Do not place your hands or
fingers in between the magnets at any time
during the assembly or disassembly
procedure.
1. Remove four socket head cap screws (3) connecting
the drive adapter (2) to the motor (1).
2. Remove entire pump assembly from the motor (1) and
outer magnet (4). Due to the magnet, there will be
some significant resistance when trying to pull the
pump assembly/inner magnet from the outer magnet
(4) and motor (1).
3. Place the pump assembly with the drive adapter (2)
bore flat on a table.
4. Remove four socket head cap screws (20) connecting
the suction housing (19) to the stator housing (17).
5. Remove the suction housing (19) from the stator
housing (17) and remove the O-ring (8) from the
suction housing (17).
6. Remove the eight socket head cap screws (15)
connecting the stator housing (17) to the discharge
housing (14).
7. Remove the stator housing (17).
8. Remove the thrust bushing (11) and rotor bushing (12)
from the rotor (22) and rotor shaft (10).
9. Remove stator (21) and stator ring (23) (on 331 and
332 models only).
10. Remove the thrust washer (11) from the rotor shaft (10).
11. Remove the rotor (22), inner magnet (9), shaft bushing
(13), and rotor end bushing (12) as an assembly.
12. Remove the rotor bushing (12) from the rotor (22), being
careful not to damage it. NOTE: Rotor shaft (10), thrust
washer (11) and end bushing (12) are all very fragile.
13. Press the inner magnet (9) off of the rotor (22).
14. Remove the shaft bushing (13) from the drive end side
of the rotor (22).
15. Remove rotor shaft (10) and thrust washer (10) from the
drive adapter (2)
16. Remove eight socket head cap screws (15) and nuts
(16) connecting the discharge housing (14) to the drive
adapter (2).
17. Remove the discharge housing (14) from the drive
adapter (2).
18. Remove the spacer plate (5) and magnet casing (6)
from the drive adapter (2)
19. Remove the outer magnet (4) from the motor (1) by
loosening set screws in the outer magnet (4) and sliding
the outer magnet (4) off of the motor drive shaft.
PUMP ASSEMBLY
1. Place the drive adapter (2) on a table; the motor side of
the drive adapter should be flat on the table.
2. Place the spacer plate (5) onto the drive adapter (2).
3. Place magnet casing (6) into the spacer plate (5).
4. Place O-ring (7) onto the magnet casing (6).
5. Place the discharge housing (14) onto the drive adapter
(2).
6. Place one thrust washer (11) into the bore in the magnet
casing (6) and place the rotor shaft (10) through the
washer into the bore, making sure the flat in the rotor
shaft (10) lines up with the flat in the thrust washer (11)
and bore.
7. Press the shaft bushing (13) into the magnet side of the
rotor (22).
8. Press the rotor (22) into the inner magnet (9), making
sure the flat on the rotor lines up with the flat on the ID
of the magnet.
9. Place the rotor (22), magnet (9), and shaft bushing (13)
assembly onto the rotor shaft (10).
10. Install the stator ring (23) (Note: this is only supplied
on the 331 and 332 models) into the suction side of the
stator (21) if applicable. Then install the stator (21) onto
the rotor (22).
11. Place the rotor bushing (12) into the end of the rotor
(22).
12. Place the stator housing (17) over the stator (21).
13. Place second thrust washer (11) onto rotor shaft (10),
making sure that the flat in the washer lines up with the
flat in on the rotor shaft (10).
14. Place the O-ring (8) onto the suction housing (19).
15. Place the suction housing (19) and O-ring (8) onto stator
housing, making sure that the flat in the bore of the
suction housing lines up with the flat machined onto the
rotor shaft.
16. Align all bolt holes for the entire assembly.
17. Using eight socket button head cap screws (15) and
nuts (16) secure the discharge housing (14) to the drive
adapter (2).

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18. Using eight socket button head cap screws (18),
secure the stator housing (17) to the discharge housing
(14).
19. Using four socket button head cap screws (20), secure
the suction housing to the stator housing.
20. Place the outer magnet (4) onto the motor (1) drive
shaft and secure into place with set screws on the
outer magnet (4). The motor drive shaft should be
flush with the back face of the large ID bore (4.395”) of
the outer magnet (4).
21. Place the pump assembly onto the motor (1) and outer
magnet assembly (4), being careful not to put any
fingers or hands between the two magnets. Secure
the pump assembly to the motor using four socket
button head cap screws (3).

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Mag Drive Parts List
© 2010 by Moyno, Inc.
® Moyno is a registered trademark of Moyno, Inc. Printed in U.S.A.
Moyno, Inc. is a part of the Fluid Management Group of Robbins & Myers, Inc.
331 332 333 344
Motor .5HP,1750 RPM,230/460V,TEFC
Motor 1.0 HP,1750 RPM,230/460V,TEFC
Motor .5HP,1200 RPM,230/460V,TEFC
Motor 1.0 HP,1200 RPM,230/460V,TEFC
2
Drive Adapter
3
ButScrew .375-16X.88LG, 18-8
4
Outer Magnet
5
Spacer Plate
6 Magnet Casing
7
O-Ring
8
O-Ring
9
Inner Magnet
10
Rotor Shaft
11
ThrustWasher
12
Rotor Bushing
13 Shaft Bushing
14
Discharge Housing
15
ButScrew .25-20X1.50 LG, 18-8SS
16
HexNut.25-20,18-8SS
17 Stator Housing
18
ButScrew 10-24X.62 LG,18-8SS
19 Suction Housing
20
ButScrew 10-24X1.0 LG,18-8SS
Stator,Nitrile 3403501120 3403502120 3403503120 3403504120
Stator,EPDM 3403501320 3403502320 3403503320 3403504320
Stator,FPM 3403501520 3403502520 3403503520 3403504520
22
Rotor,Titanium 4252622011 4252623011 4252616011 4252645011
23
StatorRing (331 and 332 Only)
Description
6191202160
3207812000 Not Applicable
4252629001
4231186001
4241971000
4252632000
3207902157
4252627001
1
6140252010
4252628001
6191202100
4220895001
4220896001
6191112240
3207902136
4252630000
4252621011
21
Item No.
4231191002
4252633000
6191232140
Pump Model Numbers
4231190001
4231190002
4231191001
4252631000