Moyno® 500 Pump (Service Manual - 200 Series
Contents
1. Section MO Y NO MOYNO 500 PUMPS Page 1 of 4 Always the Right Solution Date December 1 1999 SERVICE MANUAL MOYNO 500 PUMPS 200 SERIES 20302 20402 20501 20502 22001 22002 23201 AND 23203 MODELS DESIGN FEATURES Housing Stainless steel or aluminum Pump Rotor Phenolic amp AISI 316 stainless steel Pump Stator NBR Nitrile Shaft AISI 316 stainless steel Bearings Prelubricated fully sealed ball bearings Seal Mechanical carbon ceramic Note Alternate elastomers available Refer to Repair Conversion kit numbers page 3 INSTALLATION Mounting Position Pump may be mounted in any position When mounting vertically it is necessary to ae aTe a seals to prevent possible seal Table 1 Temperature Limits Pre Wetting Prior to connecting pump wet pump Elastomer Temperature Limits Storage Always drain pump for extended storage periods using pipe plug in pump body elements and mechanical seal by adding fluid to be 10 160 F pumped into suction and discharge ports Turn shaft EPDM 10 210 F over several times in a clockwise direction to work fluid FPM 10 240 F into elements NBR Nitrile Piping Piping to pump should be self supporting to EPDM Ethylene Propylene Diene Terpolymer avoid excessive strain on pump housings 3 8 NPT FPM Fluoroelastomer pipe used on 203 204 205 and 220 Models and 1 2 NPT pipe used on 232 Models Use pipe dope or TROUBLE SHOOTING tape to faci2. litate disassembly and to provide seal WARNING Before making adjustments disconnect Drive On belt driven units adjust belt tension to power source and thoroughly bleed point of non slip Do not overtighten On direct drive pressure from system Failure to do so units coupling components should be aligned and could result in electric shock or serious bodily harm Replace belt or coupling spaced at least 1 16 apart guards before reconnecting power Pump rotation must be clockwise when facing shaft to prevent rotor unscrewing from shaft Check direction Failure To Pump of rotation before startup 1 Belt or coupling slip Adjust belt tension or tighten set Maximum speed is 1750 rpm 5 cdd a A Repl Stator torn possibly excessive pressure Replace OEF FATON TR Me stator Check pressure at discharge port elf Priming With wetted pumping elements the an pump is capable of 25 feet of suction lift when s Ense Rotation must be clockwise when operating at 1750 rpm with pipe size equal to port size oy Be sure suction lines are air tight or pump will not self 4 Threads in rotor or on shaft stripped Replace part prime Check for proper rotation Note Self priming capabilities will vary depending on 5 Excessive suction lift or vacuum fluid viscosity Pump Overloads DO NOT RUN DRY Unit depends on liquid pumped 1 Excessive discharge pressure Check discharge for lubrication For proper lubrication flow rate should p
3. ousing 2 and stator 3 3 Rotor 4 is removed from shaft 5 by turning in a counterclockwise direction R H thread 4 f any parts of the mechanical seal 8 are worn or broken the complete seal assembly should be replaced Seal components are matched parts and are not interchangeable 5 The bearings 6 and shaft 5 assembly can be removed from the pump body 1 after the snap ring 7 has been removed To remove the assembly tap the shaft at the threaded end using a block of wood to protect the threads Pull slinger ring 11 from shaft The bearings 6 may then be pressed off the shaft Note When replacing bearings always press on the inner race when assembling to shaft and on the outer race when pressing bearings into the housings to prevent damage to the races PUMP ASSEMBLY 1 Press inboard bearing on shaft using inner race Install slinger ring 11 on shaft Press inboard bearing amp shaft into pump body using outer race Press outboard bearing on shaft and into pump body using both races Secure with snap ring 7 2 Install mechanical seal 8 using the following procedure a Clean and oil sealing faces using clean light oil not grease Caution Do not use oil on EPDM parts Substitute glycerin or soap and water b Oil the outer surface of the seal seat and push the assembly into the bore in the pump body 1 seating it firmly and squarely c After cleaning and oiling the shaft slide the
4. ressure for 40 psig maximum or obstruction in be at least 10 of rated capacity at a given rpm discharge line Pressure and Temperature Limits Maximum 2 Fluid viscosity too high Limit fluid viscosity to 20 000 discharge pressure is 40 psig Unit is suitable for CP or 100 000 SSU service at temperatures shown in Table 1 3 Suction pressure should never be greater than dis charge pressure Page 2 Viscosity CP Limit RPM 1 300 1750 300 1 000 1200 1 000 2 000 700 2 000 5 000 350 5 000 10 000 180 10 000 20 000 100 4 Insufficient motor HP Check HP requirement Noisy Operation 1 Starved suction Check fluid level size of piping and obstructions in pipe 2 Bearings worn Replace parts 3 Insufficient mounting Mount securely Reduce vibration induced noise by using a short section of hose on discharge piping 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 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 Disconnect suction and discharge piping 2 Remove screws 9 which secure suction housing 2 to pump body 1 Remove suction h
5. ring 2 req 630 0502 021 7 Snap Ring 320 4211 000 8 Mechanical Seal 320 4215 000 9 Screws 4 req 320 4787 006 619 0850 061 320 4787 006 619 0850 061 320 4787 006 619 0850 061 320 4784 006 10 Pipe Plug 610 0420 010 11 Slinger Ring 320 2833 008 Recommended spare parts REPAIR CONVERSION KIT NUMBERS Not available as kit for 203 204 Models uu 205 Models 220 Models Item No Description NBR EPDM FPM NBR EPDM FPM Kit No 311 9061 000 311 9062 000 311 9063 000 311 9064 000 311 9065 000 311 9018 000 3 e Stator 330 6381 120 330 6381 320 330 6381 520 330 6382 120 330 6382 320 330 6382 520 8 e Seal 320 4215 000 320 6497 000 320 6037 000 320 4215 000 320 6497 000 320 6037 000 Item No Description 232 Models NBR Nitrile NBR EPDM FPM ___ EPDM Ethylene Proylene Diene Kit No 311 9066 000 311 9067 000 311 9021 000 E ar inar y 3 e Stator 330 6385 120 330 6385 320 330 6385 520 po y 8 e Seal 320 4215 000 320 6497 000 320 6037 000 FPM Fluoroelastomer 1999 by Moyno Inc Printed in U S A Moyno is a registered trademark of Moyno Inc
6. seal body along the shaft until it meets the seal seat d Install seal spring and spring retainer on shaft 3 Screw rotor 4 on shaft 5 in a clockwise direction R H thread 4 Secure stator 3 and suction housing 2 to pump body 1 with screws 9 5 Connect suction and discharge piping and proceed as outlined in installation instructions WARNING Replace belt or coupling guards before reconnecting power When ordering parts please specify Page 3 pump model number pump serial number part number part description and quantity PARTS LIST Item Descilptlon Pump Model Numbers No p 20302 20402 20501 20502 22001 22002 23201 23203 i Pump Body 316 SS 316 SS Aluminum 316SS Aluminum 316SS Aluminum 316SS 330 3328 001 330 3328 001 330 3215 001 330 3328 001 330 3215 001 330 3328 001 330 3215 000 330 3328 000 2 Suction Housing 316 SS 316 SS Aluminum 316 SS Aluminum 316 SS 316 SS 316 SS 330 3327 000 330 3327 000 330 2234 000 330 3327 000 330 2234 000 330 3327 000 330 2233 000 330 3329 000 3 Stator NBR NBR NBR NBR NBR 330 7555 120 330 7556 120 330 6381 120 330 6382 120 330 6385 120 4 Rotor 316 SS 316 SS Phenolic 316 SS Phenolic 316 SS 416 SS 316 SS 320 6975 000 320 7923 000 320 6485 000 320 6484 000 320 6488 000 320 6487 000 320 6498 000 320 6499 000 5 Drive Shaft 320 6489 000 6 Bea
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