Moyno® 500 Pump (Service Manual
Contents
1. 2002 by Moyno Inc Moyno is a registered trademark of Moyno Inc Moyno Inc is a Unit of Robbins amp Myers Inc Use only on Sanitary Models2. HP 90VDC TENV Washdown 77 Slinger Ring 3206382000 112 Clamp 3621775000 135 Stator Ring Hygienic 3207812000 135 Stator Ring Sanitary 3621774001 137 Gasket 62 OD 3308806101 Nitrile 3308806301 EPDM 3308806501 FPM 140 Gasket 78 OD 3308806102 Nitrile 3308806302 EPDM 3308806502 FPM 141 Seal Driver 3308801015 Sanitary only PARTS LIST SANITARY MODELS Item Sanitary 331 Models Sanitary 332 Models No Description NBR EPDM FPM NBR EPDM FPM 21 e Stator 3403501110 3403501300 3403501520 3403502110 3403502300 3403502520 24 Joint Assy 3308810017 3308810017 3308810017 3308810017 3308810017 3308810017 69 e Seal 3208580000 3208581000 3208582000 3208580000 3208581000 3208582000 Item Sanitary 333 Models Sanitary 344 Models No Description NBR EPDM FPM NBR EPDM FPM 21 Stator 3403503110 3403503300 3403503520 3403504110 3403504300 3403504520 24 e Joint Assy 3308810017 3308810017 3308810017 3308810017 3308810017 3308810017 69 e Seal 3208580000 3208581000 3208582000 3208580000 3208581000 3208582000 Recommended Spare Parts NBR Nitrile FDA Food Grade EPDM Ethylene Propylene Diene Terpolymer FDA Food Grade not suitable for 3A or dairy requirements FPM Fluoroelastomer Food Grade not currently available Call factory Page 4 PARTS LIST HYGIENIC MODELS I
3. MOYNO Always the Right Solution Section MOYNO 500 PUMPS Page 1 of 4 Date March 2002 SERVICE MANUAL MOYNO 500 PUMPS SANITARY HY GIENIC MOTORIZED 331 332 333 AND 344 MODELS SANITARY MODELS These pumps include housings polished to a 4 finish both inside and out The Durametallic FRO mechanical seal has carbon ceramic faces The elastomers meet the FDA requirement for food contact These pumps meet 3A require ments The universal joint may be dismantled for cleaning HYGIENIC MODELS These pumps provide the quick disassembly features of the sanitary version for easy cleaning The housings are 316 stainless steel construction however they are not polished These pumps utilize rubber covered universal joints The stators are available in non FDA nitrile EPDM and fluoroelastomers The mechanical seals are rubber bellows type with carbon ceramic faces INSTALLATION Mounting Position Pump may be mounted in any posi tion When mounting vertically it is necessary to keep the motor above the pump to prevent possible seal leakage into the bearings Pre Wetting Prior to connecting the pump wet the pump elements and mechanical seal by adding fluid to be pumped into suction and discharge ports Turn the pump over several times in a clockwise direction to work fluid into the pump elements Piping Piping to the pump should be self supporting to avoid excessive strain on pump housings Electrical Follow the
4. adapter flange 12 by removing screws 112B 7 Carefully pry seal out of discharge housing 1 If any parts of mechanical seal are worn or broken the complete seal assembly should be replaced Seal components are matched parts and are not interchangeable 8 Remove adapter flange 12 from motor 70 by remov ing screws 112A 9 Remove slinger ring 77 PUMP ASSEMBLY 1 Install slinger ring 77 2 Attach adapter flange 12 to motor housing using screws 112A 3 Attach discharge housing 1 to adapter flange 12 using screws 112B Be sure to center seal bore on shaft 4 Install mechanical seal 69 in discharge housing 1 using the following procedure a Clean and lubricate sealing faces using clean vegetable oil not grease Caution Do not use oil on EPDM parts Substitute glycerin soap and water or approved lubricate b Lubricate outer surfaces of the seal seat and push assembly over the motor shaft and into the discharge housing 1 seating it firmly and squarely c After cleaning and lubricating the shaft slide the seal body along the motor shaft until it meets the seal seat d Install seal spring and spring retainer on shaft 5 Assemble sanitary joint by sliding center section between two ends Insert pins and retain with snap rings Thread flexible joint 24 into motor shaft in a clockwise direction RH thread Tighten with 3 16 Allen wrench Page 3 6 Thread rotor 22 onto f
5. ater 2 Suction line too small Check pipe size Be sure lines are free from obstructions 3 Pump cavitates Pump speed is 1725 rpm Viscosity of fluid should not exceed 100 CP or 500 SSU 4 Flexible joint worn Replace joint Check pressure at the discharge port 5 Insufficient mounting Mount securely to a firm base Vibration induced noise can be reduced by using mount pads Seal Leakage 1 Leakage at startup If leakage is slight allow pump to run several hours to let faces run in 2 Persistent seal leakage Faces may be cracked from freezing or thermal shock Replace the seal Pump Will Not Prime 1 Air leak on suction side Check pipe connections 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 1 Remove suction and discharge piping 2 Remove clamp 112 holding suction housing 2 to dis charge housing 1 Remove suction housing 2 and stator 21 3 Remove rotor 22 from flexible joint 24 by turning counterclockwise RH thread 4 Flexible joint 24 can be removed from motor shaft by using a 3 16 Allen wrench in end of joint and turning counterclockwise Sanitary joints can be further dis assembled by removing the snap rings allowing the pins to be removed 5 Slide mechanical seal 69 off motor shaft 6 Remove discharge housing 1 from
6. lexible joint 24 in a clockwise 8 Secure stator 21 and suction housing 2 to discharge direction RH thread housing 1 using clamp 112 7 Slide stator 21 on rotor 22 On 331 amp 332 models insert rounded end of stator ring 135 into end of stator prior to installing stator on rotor 9 Lubricate rotor and stator by filling suction housing and discharge housing with fluid to be pumped 10 Connect suction and discharge piping and power source PARTS LIST To determine part numbers for all parts except standard motors enter table with item number from pump illustration Then locate part number under applicable model number first three digits Parts listed down the center are applicable to all pump models Item Pump Model Numbers No Description 331 332 333 344 1 Discharge Housing 3403921007 Sanitary Models 3403922007 Hygienic Models 2 Suction Housing 3403919007 Sanitary Models 3403920007 Hygienic Models 12 Adapter 3308809000 22 Rotor 316 SS Hygienic 3202933000 3202942000 3202936000 3202934000 22 Rotor 316 SS Sanitary 3208576000 3208577000 3208578000 3208579000 70 Standard Motor Hygienic 3304529003 5HP 115 230V 1PH TEFC 70 Standard Motor Sanitary 3308807003 5HP 115 230V 1PH Washdown duty 70 Motor DC Hygienic 3308808000 5HP 90VDC TENV 70 Motor DC Sanitary 3308808003 5
7. luoroelastomer 10 240 F FDA Food Grade on Sanitary Models FDA Fluoroelastomer not currently available Call factory Page 2 TROUBLESHOOTING WARNING Before making adjustments disconnect power source and thoroughly bleed pres sure 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 the power supply Voltage must be 10 of nameplate rating when the motor is in locked rotor condition Check for faulty capacitor on 1 phase models 2 Motor runs and thermally kicks out Check for excessive discharge pressure Check for defective centrifugal switch on 1 phase models Increase ventilation to motor Do not use less than 14 wire size 3 Stator torn possible excessive pressure Replace stator check pressure at discharge port 4 Flexible joint broken possible excessive pressure Replace joint check pressure at the discharge port 5 Wrong rotation 8 phase only Rotation must be clock wise when facing pump from motor end Reverse the con nections of any two line leads to the motor 6 Excessive suction lift or vacuum 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 100 CP or 500 SSU Noisy Operation 1 Excessive suction lift or vacuum Maximum suction lift is 25 feet for w
8. tem Hygienic 331 Models Hygienic 332 Models No Description NBR EPDM FPM NBR EPDM FPM 21 e Stator 3403501120 3403501320 3403501520 3403502120 3403502320 3403502520 24 e Joint 3208574001 3208574003 3208574005 3208574001 3208574003 3208574005 69 e Seal 3202424000 3621792000 3206501000 3202424000 3621792000 3206501000 Item Hygienic 333 Models Hygienic 344 Models No Description NBR EPDM FPM NBR EPDM FPM 21 e Stator 3403503120 3403503320 3403503520 3403504120 3403504320 3403504520 24 e Joint 3208574001 3208574003 3208574005 3208574001 3208574003 3208574005 69 e Seal 3202424000 3621792000 3206501000 3202424000 3621792000 3206501000 Recommended Spare Parts Sanitary Joint Assy Required Hardware Not Shown NBR Nitrile Assy No 3308810017 P N Description Qty EPDM 0 P N Description Qty 3206715007 Screw 4 opines bein 3207314015 Pin 2 6230012410 Lock Washer 4 3208575015 Snap Ring 2 6191522160 Screw 4 ABRASION RESISTANT SEALS 3308802017 Joint End 2 6230012400 Lock Washer 4 Hygienic only 3308803017 Joint Center 1 Elastomer All 331 344 Models NBR 3206460000 EPDM 3206502000 FPM 3206503000 N Y WLS y EZ NI ZZOZ a a er AW a LA 4 KY K pp SSS a When ordering parts please specify pump model number pump serial number part number part description and quantity lt gt Use only on 331 amp 332 Models
9. wiring diagram on the motor name plate 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 The motor is provided with internal automatic over load protection To prevent damage to the pump pump rotation must be clockwise when facing the pump from the motor end OPERATION Self Priming With wetted pumping elements the pump is capable of 25 feet of suction lift with pipe size equal to port size Be sure suction lines are air tight or the pump will not self prime Self priming capabilities will vary due to fluid viscosity DO NOT RUN DRY The unit depends on liquid pumped for lubrication For proper lubrication the flow rate should be at least 10 of rated capacity Pressure and Temperature Limits See Table 1 for max imum discharge pressure of each model The unit is suitable for service at temperatures shown in Table 2 Storage Always drain the pump for extended storage periods by removing the suction housing and stator Caution Suction pressure should never be greater than discharge pressure Table 1 Pump Data Pump Models 331 332 333 344 Discharge Pressure 150 100 50 40 psig maximum Table 2 Temperature Limits Elastomer Temperature Limits NBR Nitrile 10 160 F EPDM 10 210 F FPM F
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