SERVICE MANUAL MOYNO 500 PUMPS
Contents
1. Item Description Nae p 331 Models 332 Models NBR EPDM FPM NBR EPDM FPM Kit No 311 9026 000 311 9025 000 311 9054 000 311 9027 000 311 9038 000 311 9055 000 21 e Stator 340 3501 120 340 3501 320 340 3501 520 340 3502 120 340 3502 320 340 3502 520 24 e Joint 320 1511 000F 320 6367 000T 320 4670 000T 320 1511 000F 320 6367 000T 320 4670 000T 69 e Seal 320 2424 000 320 6379 000 320 6501 000 320 2424 000 320 6379 000 320 6501 000 Item Description es p 333 Models 344 Models NBR EPDM FPM NBR EPDM FPM Kit No 311 9029 000 311 9028 000 311 9056 000 311 9031 000 311 9030 000 311 9057 000 21 e Stator 340 3503 120 340 3503 320 340 3503 520 340 3504 120 340 3504320 340 3504520 24 e Joint 320 1511 000F 320 6367 000T 320 4670 000T 320 1511 000F 320 6367 000T 320 4670 000T 69 e Seal 320 2424 000 320 6379 000 320 6501 000 320 2424 000 320 6379 000 320 6501 000 t316SS with appropriate elastomer Carbon steel NBR kits are available only with carbon steel joints a 316SS NBR joint for 331 344 Models is available as 320 3759 000 Item p escnation 356 Models 367 Models No p NBR EPDM FPM NBR EPDM FPM t hee seal 311 9033 000 311 9032 000 311 9058 000 311 9060 000 311 9036 000 311 9124 000 21 Stator 340 3505 120 340 3505 320 340 3505 520 340 3506 120 340 3506 320 340 3506 520 24 gt Flex Joint 320 1583 0004 320 6369 000f 320 4671 000t 3202. MOYNO Always the Right Solution Section MOYNO 500 PUMPS Page 1 of 8 Date March 1 1998 SERVICE MANUAL MOYNO 500 PUMPS 300 SERIES 331 332 333 344 356 AND 367 MODELS Mechanical Seal Models Packing Gland Models MODELS 33101 34401 33104 34404 DESIGN 33201 35601 33204 35604 33108 33308 34411 FEATURES 33301 36701 33304 36704 33208 34408 35611 35613 Housing Cast Iron AISI 316 SS Nylon Cast Iron AISI 316 SS Bao Roi Chrome plated Chrome plated Chrome plated Chrome plated Chrome plated P 416 SS 316 SS 416 SS 416 SS 316 SS Pump Stator NBR Nitrile NBR Nitrile NBR Nitrile NBR Nitrile NBR Nitrile Shaft 416 SS 316 SS 416 SS 416 SS 316 SS Flexible Joint Carbon steel 316 SS Carbon steel Carbon steel 316 SS NBR NBR NBR NBR NBR Bearings Ball sealed Ball sealed Ball sealed Ball sealed Ball sealed Mechanical Seal Packing Carbon ceramic Carbon ceramic Carbon ceramic Braided PTFE Braided PTFE Note Alternate elastomers available Refer to Repair Conversion kit numbers page 8 INSTALLATION Mounting Position Pump may be mounted in any position When mounting vertically it is necessary to keep bearings above seals to prevent possible seal leakage into bearings Pre Wetting Prior to connecting pump wet pump elements and mechanical seal or packing by adding fluid to be pumped into suction and discharge ports Turn shaft over several
3. Pump Data Pump Models 331 332 333 344 356 367 Suction Port 7 4 heton Pon ar for efor frae Discharge i baga ee a oe foje Discharge 150 100 50 40 50 50 Pressure 08 versions 1 NPT psig Table 2 Temperature Limits Elastomer Temperature Limits NBR 10 160 F EPDM 10 210 F FPM 10 240 F NBR Nitrile EPDM Ethylene Propylene Diene Terpolymer FPM Fluoroelastomer OPERATION Self Priming With wetted pumping elements the pump is capable of 25 feet of suction lift when operating at 1750 rom with pipe size equal to port size 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 Unit is suitable for service at temperatures shown in Table 2 Storage Always drain pump for extended storage periods by removing suction housing bolts and loosening suction housing TROUBLE SHOOTING WARNING Before making adjustments disconnect power source and thoroughly bleed pressure from system Failure to do so could result in electric shock or serious bodily harm Failure To Pump 1 Belt or coupling slip Adjust belt tension or tighten set screw on coupling 2 Stator torn possibly excessive pressure Replace stator check pressure at discharge port 3 Wrong rotation Rotation must be clo
4. 1749 000 320 6378 000 3206515 000 69 Seal 320 3945 000 320 6380 000 320 6510 000 320 1750 000 320 6390 000 320 6517 000 45 Rotor Pins 320 4439 002 320 4439 002 320 4439 002 46 Shaft Pin 320 4439 001 320 4439 001 320 4439 001 Kit No i packing Giang MedelS 311 9035 000 311 9034 000 311 9059 000 21 Stator 340 3505 120 340 3505 320 340 3505 520 24 Joint 320 1583 0004 320 6369 000t 320 4671 000t 316SS with appropriate elastomer Carbon steel NBR kits are available only with carbon steel joints a 316SS NBR joint for Model 35604 and 35613 pumps is available as 320 4427 000 a 316SS NBR joint for model 36704 is available as 320 4436 000 ABRASION RESISTANT SEALS Models Elastomer 331 344 356 36701 NBR 3206460000 3206505000 3206511000 EPDM 3206502000 3206506000 3206512000 FPM 3206503000 3206507000 3206513000 NBR Nitrile EPDM Ethylene Propylene Diene Terpolymer FPM Fluoroelastomer 1999 by Moyno Inc Moyno is a registered trademark of Moyno Inc Printed in U S A
5. stator 21 and suction housing 2 with suction port vertically up to pump body 1 using screws 112 Proceed as in installation instructions Note Adjust newly installed packing as described in maintenance procedure WARNING Replace belt or coupling guards before reconnecting power Page 5 When ordering parts please specify pump model number pump serial number part number part description and quantity MECHANICAL SEAL MODELS ee amain PACKING MODELS Pax Used on 332 and 367 only Used on 356 only O Used on 356 and 367 only gt Used on 08 only __ vsed on 367 only Page 6 PARTS LIST 331 332 333 AND 344 MODELS Item Description Mechanical Seal Models Packing Gland No Models 33101 33104 33108 33201 33204 33208 33301 33304 33308 34401 34404 34408 34411 1 Pump Body 330 1065 002 330 1910 002 340 1000 001 1A Discharge Housing 340 2362 000 1B Bearing Housing 330 4587 000 1C Pump Base 340 2369 000 2 Suction Housing 330 1064 002 330 1911 002 330 4536 000 330 1064 002 21 Stator See Stator section below 22 Rotor See Rotor section below with circled numbers for each series 24 Joint Carbon Steel NBR 316 SS NBR Carbon Steel NBR 320 1511 000 320 3759 000 320 1511 000 26 Drive Shaft 320 1499 000 320 2938 000 320 1499 000 320 2448 000 29 Bearing 2 req 630 0502 031 33 B
6. threaded end using a block of wood to protect the threads The bearings may be pressed off the shaft ha Disassemble Packing Models Disconnect suction and discharge piping 2 Remove screws 112 which hold suction housing 2 to pump body 1 Remove suction housing and stator 21 3 Remove rotor 22 from flexible joint 24 by turning in a counter clockwise direction RH thread 4 Flexible joint 24 can be removed by using a 3 16 inch allen wrench in end of joint 1 4 inch wrench on 356 Models and turn in a counter clockwise direction 5 The packing 42 can be removed without removing the shaft 26 using the following procedure a Remove gland bolts 47 b Slide gland 41 away from packing 42 c Pull out packing 42 and lantern ring halves 57 on 356 Models using a packing removing tool Page 3 Note Packing can be removed after shaft has been re moved by pushing out from pump side of pump body after gland 41 has been detached 6 The bearings 29 and shaft 26 assembly can be removed from pump body 1 after snap ring 66 has been removed To remove the assembly lightly tap the shaft at threaded end using a block of wood to protect the threads 7 To disassemble shaft assembly remove snap ring 66A from shaft 26 and press bearings 29 and bearing spacer 33 off the shaft PUMP ASSEMBLY To Assemble Mechanical Seal Models 1 Press bearings 29 on shaft 26 and locate slinger ri
7. 07 2 Suction Housing 350 0280 000 350 0489 000 350 0280 000 350 0489 000 350 0302 000 350 0302 007 94 Stator NBR NBR NBR 340 3505 120 340 3505 120 340 3506 120 22 Rotor 416SS 316SS 416SS 316SS 416SS 316SS 320 2304 000 320 4431 000 320 2304 000 320 4431 000 330 2042 000 330 3077 000 24 Flex Joint Carbon Steel 316SS Carbon Steel 316SS Carbon Steel 316SS 320 1583 000 320 4427 000 320 1583 000 320 4427 000 320 1749 000 320 4436 000 26 Drive Shaft 320 1759 000 320 4430 000 320 2765 000 320 4435 000 330 1805 000 330 1805 015 29 Bearing 2 req 630 0552 051 630 0552 061 33 Bearing Spacer 320 2764 000 41 Packing Gland 320 0003 004 320 0003 007 42 Packing 340 3396 008 45 Rotor Pin 320 4439 002 46 Shaft Pin 320 4439 001 47 Gland Bolt 619 1530 241 57 Lantern Ring Half 320 6585 000 66 Snap Ring 320 1758 000 320 2794 000 66A Snap Ring 320 3533 000 69 Mechanical Seal 320 3945 000 320 1750 000 69A Seal Spacer 320 4434 000 77 Slinger Ring 320 6383 000 320 6385 000 320 6385 000 112 Screws 6 req 619 1530 161 619 1530 161 115 Zerk Fitting 320 2503 001 135 Stator Spacer 330 7594 000 202 Shaft Key 611 0040 240 215 Lock Washer 6 req 623 0010 411 261 Pipe Plug 610 0120 011 610 0420 010 610 0120 011 610 0420 010 610 0120 011 610 0420 010 Recommended spare parts 2 Required See page 8 for Repair Conversion Kits Page 8 REPAIR CONVERSION KIT NUMBERS ELASTOMER REPAIR CONVERSION KITS
8. 2 Persistent leakage Packing rings and or shaft may be worn Replace parts as required Pump Will Not Prime 1 Air leak on suction side Check pipe connections MAINTENANCE General These pumps have been designed for a minimum of maintenance the extent of which is routine lubrication and adjustment of packing The pump is one of the easiest to work on in that the main elements are very accessible and require few tools to disassemble Packing Lubrication 356 Models Only The zerk fitting on the side of the suction housing leads to the lantern ring halves in the mid section of the packings At least once a week inject a small quantity of good quality grease such as MPG 2 Multi Purpose Grease Du Bois Chemical or equivalent into the zerk fitting to lubricate the packings Note For Model 34411 lubricate packing by applying a liberal amount of grease during assembly Packing Adjustment Packing Models Only Packing gland attaching nuts should be evenly adjusted so they are little more than finger tight Over tightening of the packing gland may result in premature packing failure and possible damage to the shaft and gland When the packing is new frequent minor adjustments are recommended for the first few hours of operation in order to compress and seat the packing Be sure to allow slight leakage for lubrication of packing When excessive leakage can no longer be regulated by tightening the gland nuts remove and replace
9. ckwise when facing shaft 4 Threads in rotor or on shaft stripped Replace part Check for proper rotation 5 Excessive suction lift or vacuum Pump Overloads 1 Excessive discharge pressure Check discharge pressure for maximum rating given in Table 1 Check for obstruction in discharge pipe 2 Fluid viscosity too high Limit fluid viscosity to 20 000 CP or 100 000 SSU 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 3 Insufficient motor HP Check HP requirement Noisy Operation 1 Starved suction Check fluid supply length of suction line and obstructions in pipe 2 Bearings worn Replace parts check alignment belt tension pressure at discharge port 3 Broken flexible joint Replace part check pressure at discharge port 4 Insufficient mounting Mount to be secure to firm base Vibration induced noise can be reduced by using mount pads and short sections of hose on suction and discharge ports Mechanical Seal Leakage Mechanical Seal Models Only 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 Packing Leakage Packing Models Only 1 Leakage at startup Adjust packing as outlined in maintenance instructions Note Slight leakage is necessary for lubrication of packing
10. earing Spacer 320 1900 000 41 Packing Gland 320 0101 004 42 Packing 340 3396 005 47 Gland Bolt 619 1520 161 66 Snap Ring 320 1506 000 66A Snap Ring 320 4182000 69 Mechanical Seal 320 2424 000 77 Slinger Ring 320 6382 000 320 6384 000 100 Pipe Plug 3 req 610 0120 021 112 Screws 8 req 619 1430 103 320 5968 000 619 0860 081 619 1430 103 112C Screws 4 req 61 9 0890 281 135 Stator Ring 331 332 only 320 7812 000 215 Lock Washer 8 req 320 6464 000 Recommended spare parts STATORS Models 331 332 333 344 21 Standard Stator NBR All Models 340 3501 120 340 3502 120 340 3503 120 340 3504 120 21 EPDM Stator 340 3501 320 340 3502 320 340 3503 320 340 3504 320 21 FPM Stator 340 3501 520 340 3502 520 340 3503 520 340 3504 520 ROTORS 22 4 416SS All Models 320 2729 000 330 0906 000 320 1394 000 320 1841 000 22 2 3168S All Models 320 2933 000 320 2942 000 320 2936 000 320 2934 000 See page 8 for Repair Conversion Kits PARTS LIST 356 AND 367 MODELS Page 7 Item Description Mechanical Seal Models Packing Gland Models Mechanical Seal Model No 35601 35604 35611 35613 36701 36704 1 Pump Body Cast Iron 316SS Cast Iron 316SS Cast Iron 316SS 340 0636 000 340 1550 000 350 0420 000 350 0491 000 350 0423 000 350 0423 0
11. g screws 112 8 Proceed as in installation instructions To Assemble Packing Models 1 Press bearings 29 with bearing spacer 33 in between on shaft 26 and secure in place using snap ring 66A 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 8 Page 4 Install packing 42 before installing shaft assembly using the following procedure a Lubricate each individual ring of packing with a grease that is insoluble in the fluid being pumped b Individually assemble each ring of packing loosely in the packing chamber of the pump body 1 Stagger splits on rings Four rings 3 16 inch square required on Model 34411 four rings 1 4 inch square and two lantern ring halves 57 assembled between two rings on 356 Models c Loosely install packing gland 41 on pump body 1 using gland bolts 47 Press shaft assembly into pump body 1 positioning slinger ring 77 between packing gland 41 and bear ing end of pump body Secure the shaft assembly with snap ring 66 Thread flexible joint 24 into shaft 26 in a clockwise direction RH thread Thread rotor 22 onto flexible joint 24 in a clockwise direction RH thread Slide stator 21 on rotor 22 On 331 and 332 Models insert rounded end of stator ring 135 into end of stator prior to installing stator on rotor Secure
12. ng 77 near bearing on threaded end of 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 2 Press shaft assembly into pump body 1 securing with snap ring 66 3 Install mechanical seal 69 using the following procedure a Clean and oil sealing faces using a 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 seal body along the shaft until it meets the seal seat d Install seal spring and spring retainer on shaft 4 Thread flexible joint 24 into shaft 26 in a clockwise direction RH thread On 356 Models install seal spacer 69A and washer 116 before threading flexible joint onto shaft in a clockwise direction On Model 36701 use shaft pin 46 to pin flexible joint 24 to shaft 5 Thread rotor 22 onto flexible joint 24 in a clockwise direction RH thread On Model 36701 pin rotor 22 to joint using rotor pin 45 6 Slide stator 21 on rotor 22 On 331 and 332 Models insert rounded end of stator ring 135 into end of stator prior to installing stator on rotor 7 Secure stator 21 and suction housing 2 with suction port vertically up to pump body 1 usin
13. the packings in accordance with the DISASSEMBLY and REASSEMBLY instructions The entire pump need not be disassembled to replace the packings Bearing Lubrication The prelubricated fully sealed bearings do not require additional lubrication 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 ie Disassemble Mechanical Seal Models Disconnect suction and discharge piping gt Remove screws 112 holding suction housing 2 to pump body 1 Remove suction housing and stator 21 3 Remove rotor 22 from flexible joint 24 by turning counter clockwise RH thread Use 3 16 inch diameter punch to remove rotor pin 45 on Model 36701 4 Flexible joint 24 can be removed from shaft 26 by using a 3 16 inch allen wrench in end of joint 1 4 inch wrench on 356 Models and turn counter clockwise Use 3 16 inch diameter punch to remove shaft pin 46 on Model 36701 5 Carefully slide mechanical seal 69 off shaft 26 Carefully pry seal seat out of pump body 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 6 The bearings 29 and shaft 26 assembly can be removed from pump body 1 after snap ring 66 has been removed To remove the assembly lightly tap the shaft at
14. times in a clockwise direction to work fluid into 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 Drive On belt driven units adjust belt tension to point of non slip Do not overtighten On direct drive units coupling components should be aligned and spaced at least 1 16 apart Pump rotation must be clockwise when facing shaft to prevent damage to pump Check direction of rotation before startup Water Flush of Packing 356 Models Only The packing may be either grease lubricated through a grease fitting in the stuffing box or have plumbing connected to the housing to allow a water flush Maximum speed is 1750 rpm When the material being pumped is abrasive in nature it may be advantageous to flush the packing to prevent leakage under packing and excessive shaft wear Page 2 Clean water can be injected through a 1 8 NPT tapped hole that normally houses the grease fitting for lubricating the packing The water can be permitted to leak axially along the shaft in either direction or can be removed from the second tapped hole in the stuffing box In both cases the discharge from the stuffing box should be throttled slightly to maintain 10 15 PSI higher pressure in the stuffing box than is present in the discharge housing Table 1
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