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30

11

Exploded Views and Parts Lists

Manual 1861   Rev C   p/n 001861 0000

SDV-120 EXPLODED VIEW DRAWING

For serial numbers from:

• 

SDV-120: S/N 406 

Содержание SDV Series

Страница 1: ... S MANUAL Manual 1861 Rev C p n 001861 0000 Tuthill Springfield tuthillvacuumblower com 800 825 6937 WARNING Do Not Operate Before Reading Manual Operator s Manual Tuthill SDV Series Dry Vacuum Pump Copyright 2019 Tuthill Springfield All rights reserved Product information and specifications subject to change ...

Страница 2: ...ps and M D PneumaticsTM blowers and vacuum boost ers in Springfield Missouri USA We bring 100 years of engineering experience and solid hands on care to help customers keep their processes running Your satisfaction is important to us so please take time to provide your Tuthill sales representative with performance feedback We love to hear from our customers Tuthill is a family owned business that ...

Страница 3: ...terials of Construction 3 Identification 4 Specifications SDV 120 to SDV 430 5 Specifications SDV 800 to SDV 2700 6 Safety 7 Graphic Conventions Used in this Manual 7 Safety Instruction Tags 7 Safety Precautions for Dry Vacuum Pumps 8 Piping 9 Fresh Water Cooling 9 Air Water Radiator 11 Connections Diagram 12 Installation 13 Location 13 Foundation 13 Pump Installation 13 ...

Страница 4: ...Purge 17 Post Process Dry Operation 17 Steam Flushing 18 Operation 19 Prestart Checks 19 Starting the Pump 19 Stopping the Pump 20 Lubrication 20 Maintenance and Inspection 21 Overheating 21 Abnormalities 21 Interference 21 Freezing 21 Inspection Schedule 22 Daily Inspection 22 Monthly Inspection 22 Quarterly Inspection 22 Bi annual Inspection 22 Yearly Inspection 22 Maintenance and Inspection Sch...

Страница 5: ... Drawing Set 1 34 SDV 320 Parts List 35 SDV 320 Exploded View Drawing Set 2 36 SDV 320 Parts List 37 SDV 430 Exploded View Drawing Set 1 38 SDV 430 Parts List 39 SDV 430 Exploded View Drawing Set 2 40 SDV 430 Parts List 41 SDV 800 Exploded View Drawing Set 1 42 SDV 800 Parts List 43 SDV 800 Exploded View Drawing Set 2 44 SDV 800 Parts List 45 SDV 1500 Exploded View Drawing 46 SDV 1500 Parts List 4...

Страница 6: ...iv Table of Contents Manual 1861 Rev C p n 001861 0000 ...

Страница 7: ...efully before installing operating or servicing the pump PRINCIPLE OF OPERATION The SDV Dry Screw Vacuum Pump is a single stage dry running non contact variable pitch screw type vacuum pump The design principle of the SDV is simple Two parallel variable pitch screws having a highly sophisticated surface profile consisting of an Archimedean and Quimby curve and an arc rotate in opposite directions ...

Страница 8: ...he top of the red mark or OL Mark Oil levels are indicated as follows for pumps manufactured after October 2005 OL Original Line Fill oil up to this line initially RH Running High During the Operation In this case check the pump RL Running Low During the Operation In this case check the pump WARNING If the oil level is too low gears bearings and mechanical seals will be damaged as a result of impr...

Страница 9: ... 0KIT SDV 800 KIT KALREZ 241 SN 341 086800 0KIT SDV 1500 KIT KALREZ O RINGS 086150 0KIT SDV 2700 KIT KALREZ O RINGS 086270 0KIT SDV 320 KIT VITON 404 SN 507 08632V 0KIT SDV 430 KIT VITON 351 SN 512 08643V 0KIT Polished stainless steel sleeves heat fitted for serial numbers from SDV120 KIT KALREZ SN 406 548 086120 1KIT SDV200 KIT KALREZ SN 263 376 086200 1KIT SDV320 KIT KALREZ SN 404 507 086320 1KI...

Страница 10: ... housing serial number which are both required for correct parts identification The housing serial number is located on the left side of the pump body opposite side of the Tuthill serial number plate and the number is normally stamped into the housing casting and will be a 3 or four digit number See examples below ...

Страница 11: ...GPM 4 LPM 2 1 GPM 8 LPM 2 9 GPM 11 LPM Cooling purge 3 None None None None Maximum water jacket pressure rating 100 PSIG 100 PSIG 100 PSIG 100 PSIG Liquid Handling Capacity 1 Gallons per min 1 5 Gallons per min 2 Gallons per min 2 25 Gallons per min Maximum particle size 25 micron or below 25 micron or below 45 micron or below 45 micron or below Ambient temperature range 0 F 104 F 0 F 104 F 0 F 10...

Страница 12: ...um discharge pressure rating PSIG BarG 5 0 3 3 0 2 3 0 2 Discharge temperature 455 F 235 C 482 F 250 C 500 F 260 C Maximum design temperature inlet gas 122 F 50 C 122 F 50 C 122 F 50 C Maximum design temperature discharge gas 572 F 300 C 572 F 300 C 572 F 300 C Maximum design temperature oil 158 F 70 C 158 F 70 C 158 F 70 C Maximum design temperature grease 176 F 80 C 176 F 80 C 176 F 80 C Maximum...

Страница 13: ... environment or cause the equipment to operate improperly OTE N Indicates a procedure practice or condition that should be followed in order for the equipment to function in the manner intended SAFETY INSTRUCTION TAGS WARNING Do not operate without belt guard CAUTION Do not valve or restrict pump discharge opening Use oil mist eliminator when operating pump ensure adequate ventilation when dischar...

Страница 14: ...entally unfriendly chemical vapor pump discharge must be connected to the properly sized scrubber system to neutralize the harmful chemicals prior to the discharge to the atmosphere Laws and ordinances may pertain to your local area regarding discharge of oil mist oil vapor or chemical vapor to atmosphere Check local laws and ordinances prior to operation of the pump with discharge to outside atmo...

Страница 15: ...ING The fresh water cooling system consists of a once through cooling water circuit To monitor the adequacy of the cooling water flow and the cooling water discharge temperature install a flow indicator flow switch on the cooling water supply line and a temperature gauge or switch at the cooling water discharge line On SDV 120 pumps the silencer is not jacketed Hence the cooling water circuit is n...

Страница 16: ...harge for SDV 120 Models with Once Through Cooling On SDV 200 and larger sized pumps the cooling water circuit is extended to the process exhaust silencer see Figure 3 2 MOTOR FI PI SILENCER TI VG S PROCESS INLET COOLING WATER SUPPLY FSL Tl PROCESS DISCHARGE COOLING WATER DISCHARGE COOLING WATER DRAIN SILENCER DRAIN COOLING WATER DRAIN Figure 3 2 Typical Process and Inlet Discharge for All Other S...

Страница 17: ...ge temperature install a flow indicator flow switch on the cooling water supply line and a temperature gauge or switch at the cooling water discharge line For SDV 120 the silencer is not jacketed Hence the cooling water circuit is not extended to the process exhaust silencer see Figure 3 3 S FI MOTOR SILENCER PROCESS INLET PI FSL TI PROCESS DISCHARGE SILENCER DRAIN COOLING WATER DRAIN VG MOTOR MOT...

Страница 18: ...ess exhaust silencer see Figure 3 4 S FI SILENCER PI FSL TI TI PROCESS DISCHARGE SILENCER DRAIN COOLING WATER DRAIN COOLING WATER DRAIN MOTOR MOTOR MOTOR PROCESS INLET VG Figure 3 4 Typical Process and Inlet Discharge for All Other SDV Models with Fan Cooled Re circulated Cooling Water System Caption Needed Here Caption Needed Here ...

Страница 19: ... the base frame and the foundation if required for leveling The pump assembly with the base frame should be leveled to within 0 02 in in any 3 28 ft 0 5 mm in any 1 m 3 Place adequately sized anchorbolts in position 4 Once the pump assembly is set on the foundation and anchorbolts adequately grout the base frame before tightening the anchorbolt nuts Tigten the anchorbolt nuts after the grout is fi...

Страница 20: ...nd dispose of or drain them as required Cooling Water Piping Assembly SDV pumps are equipped with an integrated cooling liquid jackets A cooling medium typically water must be supplied to the cooling liquid supply nozzle located at the FEC Front End Plate The cooling medium will be circulated to the pump casing and discharged from the discharge nozzle located on the casing If a water jacketed disc...

Страница 21: ...inutes to clean or dry out the pump Once the time is up close the solenoid valve and stop the pump B Gear Box Purge and NDE Bearing Purge These are both controlled by a solenoid valve as well one solenoid for the gear box and one solenoid for the NDE bearing area Both solenoid valves open when the pump is on and close when the pump is off Very little N2 or dry air will flow as they are designed to...

Страница 22: ...ate FEP and or Rear End Plate REP with gas that is compatible with the process gas and the lubrication oil grease or inert gas such as nitrogen or argon Connect the Drive End DE seal purge to the two purge connection nozzles on the Front End Cover Connect the Non Drive End NDE seal purge to the two purge connection nozzles on the Rear End Plate REP OTE N On SDV 120 pumps there is only one Non Driv...

Страница 23: ...d when the end user decides to supply cooling purge to the pump Purge pressure Atmospheric pressure for process inlet pressure operating pressure of 150 Torr or below 7 11 psig 0 5 kg cm2 g minimum for process inlet pressure operating pressure of 150 Torr or higher Cooling purge flow rates can vary depending on the process inlet pressure SDV 120 SDV 200 SDV 320 SDV 430 SDV 800 SDV 1500 SDV 2700 Co...

Страница 24: ...cidentally starts the pump during the steam flushing The process isolation valve should be closed The discharge valve if equipped and silencer drain valve should be open 2 Inject steam for 10 to 20 minutes through the pump s process inlet suction nozzle or one of the nozzles at the side of the pump s process inlet suction nozzle OTE N The steam injection time can be varied based on the types and a...

Страница 25: ... pump rotation is correct CW Clockwise direction looking from the motor A pump rotational direction check can be done by jogging the pump a brief moment while checking the rotational direction of the motor fan If the motor rotates CCW Counter Clockwise correct the power cable connections and recheck the rotational direction to ensure the pump rotates in the correct CW direction Perform the pump ro...

Страница 26: ...s before disconnecting the motor power Ssee Start Stop Cleaning Purges on page 12 for more information All other pumps should undergo a 10 20 minute post process drying operation before the motor power is disconnected See Post Process Dry Operation on page 14 for more information 3 Shut down the pump 4 Shut off the cooling liquid supply If the pump must be shut down for a long period of time when ...

Страница 27: ...s corrosion will cause the clearance between the screws and casings to increase and increase the slip internal reverse flow flow of gas from the pump discharge to the suction The pumping capacity of the pump is then decreased If this happens shut down the pump and then measure and verify clearances in order to determine the required corrective actions ABNORMALITIES Tuthill recommends daily inspect...

Страница 28: ...oil levels can damage gears and bearings 9 Check for any sign of external oil leakage 10 Check the cooling liquid supply flow rate and pressure Monthly Inspection 1 Check the oil color If the oil color is too dark replace the oil 2 Check the oil level If the oil level drops in a short period of time check the mechanical seals 3 Check the grease Quarterly Inspection 1 Check the cooling liquid flow ...

Страница 29: ... cover What is the color Has it changed to reddish brown X Cooling water pressure Is the pressure as specified or too high X Grease Is grease color dark contaminated or broken down X Oil leaks Any signs of oil leaks X Reverse cooling filter cooler Any heat on suction pipe X Belt tension Check V belt tension X Lubricant color Check color If dark replace lubricant X Oil level If oil level drops dras...

Страница 30: ...0 11 mm SDV 320 S N 175 and later 0 0047 0 0059 in 0 12 0 15 mm 0 0028 0 0035 in 0 07 0 09 mm SDV 430 S N 166 and earlier 0 0039 0 0059 in 0 10 0 15 mm 0 0035 0 0043 in 0 09 0 11 mm SDV 430 S N 167 and later 0 0047 0 0059 in 0 12 0 15 mm 0 0035 0 0043 in 0 09 0 11 mm SDV 800 0 0059 0 0071 in 0 15 0 18 mm 0 0047 0 0059 in 0 12 0 15 mm SDV 1500 0 0079 0 0098 in 0 20 0 25 mm 0 0059 0 0071 in 0 15 0 1...

Страница 31: ...et the timing gear Motor overload Clogged inlet filter and or strainer Clean or change the inlet filter and or strainer Foreign matter is caught in the pump Check the screw E clearance and reset reset the timing gear if needed If the screws and or casing are damaged by foreign material replace the screw and or casing Significant increase of inlet pressure Check the pressure differential between th...

Страница 32: ...d backpressure Drain and clean discharge nozzle and piping Knocking Incorrect positioning of timing gears and screws Reposition the timing gears and screws run out or flatness of the timing gears should be within 0 001 in 0 03 mm Improper assembly Reassemble the pump Abnormal rise of inlet pressure Search for the cause Damaged gear due to overload or improper lubrication Replace timing gears Beari...

Страница 33: ...voltage and amperage in full vacuum Is it acceptable q Any abnormal noise q Check operation temperature Is it normal q Check the lubricant color and level Is it acceptable q Stopping Run the vacuum pump according to Start Stop Cleaning Purges on page 12 or Post Process Dry Operation on page 14 for the specified time period after closing the suction line q After the appropriate pruging operatings i...

Страница 34: ...70 26 25 3 64 62 12 58 8 6 41 7 9 5 44 47 1 66 56 32 53 35 34 62 61 67 46 40 45 38 54 18 37 68 36 69 39 28 57 27 48 51 10 43 49 11 2 71 59 13 14 42 55 65 15 16 21 50 24 23 22 20 63 31 4 33 60 17 For serial numbers up to SDV 120 S N 405 SDV 200 S N 262 SDV 120 200 EXPLODED VIEW DRAWING ...

Страница 35: ... Ring 2 28 Lock Nut 2 29 Lock Washer 2 30 Grease Cover 2 31 Timing Gear A 1 32 Timing Gear B 1 33 Power Lock 2 34 Lock Nut 1 35 Lock Washer 1 36 Seal Adapter Housing 1 ITEM NO DESCRIPTION QTY 37 Mechanical Seal Stator B 1 38 Mechanical Seal Rotor B 1 39 Seal Adapter Housing Cover 1 40 Blind Plate A 1 41 Blind Plate B 1 42 Blind Plate C 1 43 Blind Plate D 1 44 Key 1 45 Sight Glass Assembly 2 46 Bli...

Страница 36: ...30 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 120 EXPLODED VIEW DRAWING For serial numbers from SDV 120 S N 406 ...

Страница 37: ... Ass y 1 30 POWER LOCK 1 31 Dowel Pin FEC FEP Casing 4 32 Dowel Pin REP Casing 2 33 REP Slinger 2 34 Ball Bearing 1 35 Seal Adaptor Housing 1 ITEM NO DESCRIPTION QTY 36 Mech Seal Ass y B 1 37 Seal Adaptor Housing Cover 1 38 Push Sleeve 1 39 Socket Bolt Sight glass 8 40 Socket Bolt B P A 4 41 Socket Bolt B P B C 12 42 Socket Bolt REP G C 8 43 Stud Bolt 8 44 Socket Bolt FEP Casing 4 45 Hex Bolt 8 46...

Страница 38: ...32 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 200 EXPLODED VIEW DRAWING For serial numbers from SDV 200 S N 263 ...

Страница 39: ...wel Pin REP Casing 2 33 REP Slinger 2 34 Ball Bearing FEC 1 35 Seal Adapter Housing 1 36 Mech Seal FEC 1 37 Seal Adapter Housing Cover 1 ITEM NO DESCRIPTION QTY 38 Push sleeve 1 39 Plate Guide A 1 40 Plate Guide B 1 41 Plate Guide C 2 42 Socket Bolt FEP Casing 4 43 Socket Bolt B H FEP 8 44 Socket Bolt REP G C 8 45 Socket Bolt B P A 4 46 Socket Bolt B P B C 4 47 Socket Bolt S A H 14 48 Socket Bolt ...

Страница 40: ... SDV 320 EXPLODED VIEW DRAWING 30 19 28 29 27 26 8 25 9 3 6 12 5 41 47 54 44 56 53 31 34 35 45 4 38 18 36 39 37 46 40 57 65 66 1 60 7 58 59 62 62 64 68 52 43 10 49 11 51 13 14 42 2 48 55 15 20 67 61 69 22 50 16 24 21 17 23 63 32 33 For serial numbers from SDV 320 S N 403 ...

Страница 41: ...27 Lantern Ring 2 28 Lock Nut 2 29 Lock Washer 2 30 Grease Cover 2 31 Timing Gear A 1 32 Timing Gear B 1 33 Power Lock 2 34 Lock Nut 1 35 Lock Washer 1 ITEM NO DESCRIPTION QTY 36 Seal Adapter Housing 1 37 Mechanical Seal Stator B 1 38 Mechanical Seal Rotor B 1 39 Seal Adapter Housing Cover 1 40 Blind Plate A 1 41 Blind Plate B 1 42 Blind Plate C 1 43 Blind Plate D 1 44 Key 1 45 Sight Glass Assembl...

Страница 42: ...36 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 320 EXPLODED VIEW DRAWING For serial numbers from SDV 320 S N 404 ...

Страница 43: ...g FEC 1 33 Seal Adaptor Housing 1 34 Mech Seal Ass y FEC 1 35 Seal Adaptor Housing Cover 1 36 Push Sleeve 2 37 Plate Guide A 1 38 Plate Guide B 1 ITEM NO DESCRIPTION QTY 39 Plate Guide C 2 40 Lock Nut FEC 2 41 Lock Washer FEC 2 42 SPACER A 2 43 Socket Bolt FEP Casing 4 44 Socket Bolt B H FEP 8 45 Socket Bolt REP G C S A H 12 46 Socket Bolt Blind Plate 20 47 Socket Bolt S A H C 4 48 Socket Bolt Pla...

Страница 44: ...XPLODED VIEW DRAWING 27 43 10 49 64 58 11 51 13 14 22 50 42 2 48 55 15 16 24 21 17 23 20 68 70 62 54 31 33 52 32 34 35 45 4 38 18 36 39 37 66 67 60 6 41 47 44 57 53 46 40 1 59 63 63 5 30 19 28 29 26 8 25 3 12 65 69 61 56 7 9 For serial numbers less than or equal to SDV 430 S N 351 ...

Страница 45: ...ern Ring 2 28 Lock Nut 2 29 Lock Washer 2 30 Grease Cover 2 31 Timing Gear A 1 32 Timing Gear B 1 33 Power Lock 2 34 Lock Nut 1 35 Lock Washer 1 ITEM NO DESCRIPTION QTY 36 Seal Adapter Housing 1 37 Mechanical Seal Stator B 1 38 Mechanical Seal Rotor B 1 39 Seal Adapter Housing Cover 1 40 Blind Plate A 1 41 Blind Plate B 1 42 Blind Plate C 1 43 Blind Plate D 1 44 Key 1 45 Sight Glass Assembly 2 46 ...

Страница 46: ...40 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 430 EXPLODED VIEW DRAWING For serial numbers greater than SDV 430 S N 352 ...

Страница 47: ...ing Shaft 1 33 Seal Adaptor Housing 1 34 Mech Seal Ass y FEC 1 35 Seal Adaptor Housing Cover 1 36 Push sleeve 1 37 Plate Guide A 1 38 Plate Guide B 1 ITEM NO DESCRIPTION QTY 39 Plate Guide C 2 40 Lock Nut REP 1 41 Lock Washer REP 1 42 Spacer 2 43 Socket Bolt FEP Casing 4 44 Socket Bolt B H FEP 8 45 Socket Bolt B H FEP 12 46 Socket Bolt Blind Plate 32 47 Socket Bolt S A H C 4 48 Socket Bolt Plate g...

Страница 48: ...800 EXPLODED VIEW DRAWING 30 19 28 29 27 26 8 25 3 6 12 5 44 58 1 7 9 63 65 69 61 57 41 47 55 54 53 52 31 34 35 45 46 40 63 59 43 10 49 11 51 13 14 22 50 42 2 48 56 15 16 24 21 17 23 20 68 70 62 64 32 33 4 38 18 36 39 37 66 67 60 For serial numbers greater than SDV 800 S N 240 ...

Страница 49: ...ern Ring 2 28 Lock Nut 2 29 Lock Washer 2 30 Grease Cover 2 31 Timing Gear A 1 32 Timing Gear B 1 33 Power Lock 2 34 Lock Nut 1 35 Lock Washer 1 ITEM NO DESCRIPTION QTY 36 Seal Adapter Housing 1 37 Mechanical Seal Stator B 1 38 Mechanical Seal Rotor B 1 39 Seal Adapter Housing Cover 1 40 Blind Plate A 1 41 Blind Plate B 1 42 Blind Plate C 1 43 Blind Plate D 1 44 Key 1 45 Sight Glass Assembly 2 46 ...

Страница 50: ...44 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 800 EXPLODED VIEW DRAWING For serial numbers from SDV 800 S N 241 ...

Страница 51: ...aring Shaft 1 33 Seal Adaptor Housing 1 34 Mech Seal Ass y FEC 1 35 Seal Adaptor Housing Cover 1 36 Push Sleeve 1 37 Plate Guide A 1 38 Plate Guide B 1 ITEM NO DESCRIPTION QTY 39 Plate Guide C 2 40 Blind Plate C 2 41 Blind Plate Gasket C 2 42 Air Vent 1 43 Socket Bolt FEP Casing 4 44 Socket Bolt B H FEP 8 45 Socket Bolt REP G C S A H 14 46 Socket Bolt Blind Plate 32 47 Socket Bolt S A H C 4 48 Soc...

Страница 52: ...46 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 1500 EXPLODED VIEW DRAWING ...

Страница 53: ...l Adapter Housing 1 29 Mech Seal Ass y B 1 30 Seal Adapter Housing Cover 1 31 Power Lock 1 32 Bearing Holder C D 1 33 Wave Washer 2 ITEM NO DESCRIPTION QTY 34 Eye Bolt 1 35 Air Vent 1 36 Dowel Pin 6 37 Mesh Filter 1 38 Blind Plate A 1 39 Blind Plate B 1 40 Blind Plate C 2 41 Blind Plate D 4 42 Blind Plate E 1 43 Blind Plate F 2 44 Blind Plate G 2 45 Sight Glass Ass y 2 46 O ring Blind Plate A 1 47...

Страница 54: ...48 11 Exploded Views and Parts Lists Manual 1861 Rev C p n 001861 0000 SDV 2700 EXPLODED VIEW DRAWING ...

Страница 55: ...opper 1 30 Seal Adpt Housing 1 31 Mech Seal Ass y FEC 1 32 Seal Adpt Housing Cover 1 33 Power Lock 1 34 Bearing Holder C D 1 ITEM NO DESCRIPTION QTY 35 Sight Glass Ass y 2 36 Air Filter Ass y 2 37 Air Vent 2 38 Dowel Pin 6 39 Blind Plate A 1 40 Blind Plate B 1 41 Blind Plate C 1 42 Blind Plate D 2 43 Blind Plate E 1 44 Blind Plate F 4 45 Blind Plate G 4 46 Blind Plate H 2 47 Blind Plate I 1 48 O r...

Страница 56: ...ll void warranty Installation and transportation costs are not included and defective items must be held for Seller s inspection and returned to Seller s Ex works point upon request THERE ARE NO WARRANTIES EXPRESSED IMPLIED OR STATUTORY WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS OF PURPOSE After Buyer s ...

Страница 57: ...er com OPERATING DATA FORM PRODUCT REGISTRATION It is to the user s advantage to have the requested data filled in below and available in the event a problem should develop in the blower or the system This information is also helpful when ordering spare parts Model No V Belt Size Length Serial No Type of Lubrication Startup Date Pump RPM Operating Vacuum Pump Sheave Diameter Any other Special Acce...

Страница 58: ...7 865 8715 800 825 6937 F 417 865 2950 tuthillvacuumblower com For Service Repair Technical Support or Product Sales contact Copyright 2019 Tuthill Springfield All rights reserved Product information and specifications subject to change I N T ERNATIONAL QUALITY STAND A R D REGISTERED VACUUM BLOWER SYSTEMS TUTHILL CORPORATION ...

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