AF Manual - Tuthill Vacuum & Blower
Contents
1. ITEM NO A5 A20 A75 A130 A200 A300 T0505 T2010 T7530 T10030 19 4 4 6 19a 2 6 20 4 20a 4 20b 4 SERVICE PARTS RECOMMENDED TO KEEP ON HAND NO DESCRIPTION QTY Contact Parts Department 2 Por nede l Tuthill Vacuum amp Blower Systems 5 Gasket 1 4840 W Kearney Street 8 Mechanical Seal Assembly 1 Springfield MO 65803 10 Shim 3 Telephone 417 865 8715 Toll Free 800 825 6937 TE ong Shatt 1 Fax 417 865 2950 12 O ring Cover 1 www tuthillvacuumblower com 13 Lock Bolt 1 Service Parts can be ordered from our factory in Springfield Missouri USA for immediate shipment All parts for AF pumps are made in USA We are happy to assist you with any questions that may arise and to provide advice on applications for your AF pump Please do not hesitate to contact us 11 A 600 EXPLODED VIEW DRAWING AND PARTS LIST DESCRIPTION PEDESTAL CASING ROTOR PORT CYLINDER COVER PORT CYLINDER GASKET HBOLT 0 3750 16X0 75X0 75 C SHAFT MECHANICAL SEAL ASSY COVER O RING HBOLT 0 6250 11X1 5X1 5 C WASHER FW 0 625 KEY B17 1 0 625X0 625X1 5 PIPE PLUG HEX SOCK 1 HBOLT 0 6250 11X1 75X1 75 C DPM 0 5X1 5 NOSE O RING NOSE COVER END PLATE DRIVE BEARING PUMP BEARING BEARING LOCK NUT HBOLT 0 3750 16X1X1 C N po NOTES2. AS A THIRD PARTY BENEFICIARY OF THIS WARRANTY OR ANY OTHER WARRANTY HELD TO SURVIVE SELLER S DISCLAIMER All accessories furnished by Seller but manufactured by others bear only that manufacturer s standard warranty All claims for defective products parts or work under this warranty must be made in writing immediately upon discovery and in any event within one 1 year from date of shipment of the applicable item and all claims for defective work must be made in writing immediately upon discovery and in any event within one 1 year from date of completion thereof by Seller Unless done with prior written consent of Seller any repairs alterations or disassembly of Seller s equipment shall 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 submission of a claim as provided above and its approval Seller shall at its option either repair or replace its product part or work at the original Ex works point of shipment or refund an equitable portion of the purchase price The products and parts sold hereunder are not warranted for operation with erosive or corrosive material or those which may lead to
3. build up of material within the product supplied nor those which are incompatible with the materials of construction The Buyer shall have no claim whatsoever and no product or part shall be deemed to be defective by reason of failure to resist erosive or corrosive action nor for problems resulting from build up of material within the unit nor for problems due to incompatibility with the materials of construction Any improper use operation beyond capacity substitution of parts not approved by Seller or any alteration or repair by others in such manner as in Seller s judgment affects the product materially and adversely shall void this warranty No employee or representative of Seller other than an Officer of the Company is authorized to change this warranty in any way or grant any other warranty Any such change by an Officer of the Company must be in writing The foregoing is Seller s only obligation and Buyer s only remedy for breach of warranty and except for gross negligence willful misconduct and remedies permitted under the General Terms of Sale in the sections on CONTRACT PERFORMANCE INSPECTION AND ACCEPTANCE and the PATENTS Clause hereof the foregoing is BUYER S ONLY REMEDY HEREUNDER BY WAY OF BREACH OF CONTRACT TORT OR OTHERWISE WITHOUT REGARD TO WHETHER ANY DEFECT WAS DISCOVERED OR LATENT AT THE TIME OF DELIVERY OF THE PRODUCT OR WORK In no event shall Buyer be entitled to incidental or consequential damages Any action for breach of
4. e Replaceable port cylinder that unscrews from cover and requires no special shimming or adjustment Front end disassembly for fast access to major internal parts e American made stock parts available for immediate shipment DISASSEMBLY OF PUMP The pump may be disassembled while bolted to the baseplate by removing suction and seal water piping and working from cover to motor Most repair work will not require full disassembly but please PORT CYLINDER CASING refer to the exploded pump diagram in following these steps Figure 4 Cutaway View 1 Shut off all valves controlling flow of fluids to and from the pump casing Disconnect external piping 2 Remove bolts connecting cover to casing The cover and port cylinder assembly will slide straight outward The port cylinder is dismounted from cover by removing three socket head cap screws 3 Remove hex head lock screw and washer from motor shaft Use a bearing puller to remove rotor without damage to casing Be sure to protect the threaded shaft bore 4 Slide shims and mechanical seal off shaft 5 Unbolt casing from motor face 6 Save any and all shims from shaft and casing assemblies for proper realignment ASSEMBLY OF PUMP Before assembling of the pump carefully inspect all parts for signs of unusual wear abrasion and corrosion O rings should be checked for cracks or brittleness and the carbon face of the mechanical seal examined for scratches Replace all parts a
5. for reducing your operating costs and for saving that precious natural resource water INSTALLATION LOCATION Because of its close coupled design an AF pump is ideal for applications where space is critical Its vibration free operation permits direct bolting to the floor or mounting on a baseplate anywhere that is convenient for piping The standard motors furnished by TUTHILL Vacuum amp Blower Systems on AF are Totally Enclosed Fan Cooled TEFC suitable for areas where the motor may be exposed to water Special motors are available for hazardous locations The pump needs no adjustment alignment or coupling guard etc and because the pump runs COOL no special ventilation is necessary or access for checking sight glasses and oil In choosing a location the main consideration should be the pump s proximity to the vacuum system and convenience for draining discharge and piping the seal water GENERAL PIPING INSTRUCTIONS Figure 1 AF Axial Flow Design The Inlet Discharge and Seal Water Piping require observance of three basic rules A Piping must be free of all welding shot slag and other foreign matter that could damage pump B Piping must be supported independently to avoid stress on pump casing C Piping should be of the same diameter as the pipe connections on pump VACUUM INLET PIPING Inlet piping is a simple matter of connecting the pump to the vacuum system Models A5 and T0505 have a 3 4 NPT connecti
6. is to grease and stretch the O ring and then insert it into a greased cover groove Then slide the port cylinder cover assembly into the rotor bore The surface where cover and casing meet will be sealed by the O ring In securing the cover to the casing the cover bolts 19 must be drawn up uniformly During tightening the rotor should be turned by hand to insure easy rotation when the pump is fully assembled Loosen the bolts and then tighten again if a hard rub is experienced NOTE Models A75 A100 and A130 have two socket head bolts which should be used in the bottom cover holes After the drain plugs 17 18 have been installed with Teflon tape on the threads the vacuum pump is ready for service CLOSE COUPLED PUMP EXPLODED VIEW 10 PARTS LIST CLOSE COUPLED MODELS DESCRIPTION QTY M DESCRIPTION QTY 1 Casing 1 11 O ring Shaft 1 2 Rotor 1 12 O ring Cover 1 3 Port Cylinder 1 13 Lock Bolt 1 4 Cover 1 14 Washer 1 5 Gasket 1 15 Key 1 6 Cap Screws 3 16 Slinger 1 7 Motor 1 17 Drain Plug Cover 1 8 Mechanical Seal Assembly consisting of 1 18 Drain Plug Casing 1 8a Seat 1 19 Cover Bolts Hex Head gt 8b Seal 1 19a Cover Bolts Socket Head 8 Spring 1 20 Casing Bolts id 9 Shaft Sleeve 1 20a Casing Studs i 10 Shim 3 20b Casing Nuts d Quantity differs by model See table below for quantities required
7. Operator s Manual Tuthill AF Series Liquid Ring Vacuum Pumps FY Tuthill sure U f I Axial Flow Liquid Ring Vacuum Pump Manual 1862 2 0315 ENG WARNING Do Not Operate Before Reading Manual AF SERIES OPERATOR S MANUAL Models A5 20 130 600 2010 10 75 A200 10505 17530 15 100 A300 11505 110030 Single Stage Series Two Stage Series Tuthill Vacuum amp Blower Systems tuthillvacuumblower com 800 825 6937 WARNING A CAUTION DO NOT VALVE OR RESTRICT PUMP DISCHARGE OPENING USE OIL MIST ELIMINATOR WHEN OPERATING PUMP ENSURE ADEQUATE VENTILATION WHEN DISCHARGING INDOORS DO NOT OPERATE REFER TO MANUAL SAFETY INSTRUCTIONS WITHOUT BELT GUARD NOTICE The above safety instruction tags were permanently affixed to your pump prior to shipment Do not remove paint over or obscure in any manner Failure to heed these warnings could result in serious bodily injury to the personnel operating and maintaining this equipment SAFETY PRECAUTIONS FOR LIQUID RING PUMPS Please read the following safety information on this page before operating your vacuum pump Do not operate the pump without the coupling and belt guard properly attached Disconnect the pump motor from the electrical supply at the main disconnect before removing the belt guard Replace the belt guard before reconnecting the power supply to the pump motor Operating the pump without the belt guard
8. S 4 SAVE WATER TIME AND MONEY WITH AF SEALANT RECOVERY SYSTEMS 4 THE BASIC SYSTEM 5 HEAT EXCHANGERS 5 OTHER ALTERNATIVES 5 INSTALLATION 5 LOCATION 5 GENERAL PIPING INSTRUCTIONS 5 VACUUM INLET PIPING 5 DISCHARGE PIPING 6 SEAL WATER PIPING 6 ELECTRICAL CONNECTIONS 6 OPERATION 6 SEAL WATER REQUIREMENTS 6 STARTUP 7 STOPPING PUMP 7 MAINTENANCE TROUBLESHOOTING 7 PUMP WILL NOT TURN ON STARTUP 7 NO PUMPING ON STARTUP 7 POOR PUMP PERFORMANCE LOW VACUUM 8 PUMP UNUSUALLY NOISY 8 HIGH AMPS 8 SERVICE AND REPAIR 8 ASSEMBLY AND DISASSEMBLY INSTRUCTIONS 8 9 EXPLODED VIEW DRAWINGS AND PARTS LISTS 10 13 WARRANTY VACUUM PRODUCTS 14 INTRODUCTION CONGRATULATIONS on your purchase of a new AF axial flow liquid ring vacuum pump from Tuthill Vacuum amp Blower Systems Please examine the pump for shipping damage and if any damage is found report it immediately to the carrier If the pump is to be installed at a later date make sure it is stored in a clean and dry location and make sure covers are kept on all openings If pump is stored outdoors be sure to protect it from weather and corrosion AF liquid ring vacuum pumps are built to exacting standards and if properly installed and maintained will provide many years of reliable service We urge you to take time to read and follow every step of these instructions when installing and maintaining your pump We have tried to make these instructions as straightforward as possible because we reali
9. WARRANTY VACUUM PRODUCTS Subject to the terms and conditions hereinafter set forth and set forth in General Terms of Sale Tuthill Vacuum amp Blower Systems the Seller warrants products and parts of its manufacture when shipped and its work including installation and start up when performed will be of good quality and will be free from defects in material and workmanship This warranty applies only to Seller s equipment under use and service in accordance with Seller s written instructions recommendations and ratings for installation operating maintenance and service of products for a period as stated in the table below Because of varying conditions of installation and operation all guarantees of performance are subject to plus or minus 596 variation Non standard materials are subject to a plus or minus 10 variation PRODUCT TYPE WARRANTY DURATION New 15 months after date of shipment or 12 months after initial startup date whichever occurs first Piston Pumps 30 months after date of shipment on all units sold after June 1 2014 Repair 6 months after date of shipment or remaining warranty period whichever is greater Remanufactured 9 months after date of shipment or 6 months after initial startup date whichever occurs first THIS WARRANTY EXTENDS ONLY TO BUYER AND OR ORIGINAL END USER AND IN NO EVENT SHALL THE SELLER BE LIABLE FOR PROPERTY DAMAGE SUSTAINED BY A PERSON DESIGNATED BY THE LAW OF ANY JURISDICTION
10. and a washer 14 Lower the rotor onto the shaft key making sure to align the notch with the shaft key In order for the rotor to turn freely there must be some clearance between it and the casing On Models A5 A10 A15 A20 T0505 T1505 and T2010 this clearance is established by adding washer shims 10 until no rub is felt between the back of the rotor and the casing face On the Models 75 A100 A130 T7530 T10030 shims are used to position the rotor so that the casing face lines up with the inside wall of the rotor shroud See photograph below Figure 5 Rotor Assembly Be sure to use a bearing puller when removing rotor to add more shims Avoid damage to the casing face and to the threaded shaft bore Once secured the rotor should spin freely without any interference or rub from the casing To ensure proper alignment you may indicate the run out on the front edge of the rotor Using a dial indicator measure the run out on the rotor It should be within 003 005 inches 08 13 mm Tightening down the rotor is facilitated by using a long bolt and several washers before inserting the lock bolt STEP 3 PORT CYLINDER ASSEMBLY AND COVER The port cylinder 3 is readily mounted on the cover 4 by three socket head cap screws with nylon patches 6 A fiber gasket 5 is used to seal the surface between the cover and port cylinder while the alignment of tapped holes insures correct placement The final assembly step
11. ated from a discharge separator tank Be sure to specify if seal liquids other than water are to be used and Tuthill Vacuum amp Blower Systems will make recommendations regarding compatibility of materials power requirements etc The following accessories are recommended 1 Flow control valve see Seal Water Requirements 2 Solenoid valve to shut off water when pumping stops 3 Strainer to prevent foreign matter from entering the pump For more information about recirculating seal water consult Tuthill Vacuum amp Blower Systems ELECTRICAL CONNECTIONS Refer to the motor label or conduit box for correct wiring Most motors are three phase and will be damaged if single phased De rating for 50 cycle operation at different voltages is possible if specified on motor label Otherwise refer questions to motor manufacturer or to Tuthill Vacuum amp Blower Systems NOTE Be sure to jog motor before starting to insure Figure 2 Once through Seal Water correct wiring and rotation minimum pressure 10 PSIG OPERATION SEAL WATER REQUIREMENTS AF liquid ring pumps because of their exclusive axial flow design have the ability to handle large amounts of water and unlike radial flow pumps can start in a flooded state without damage Seal water flow is not critical and the flow rates can be readily adjusted for a wide variety of applications For most applications the optimum seal water rates are given below The water supp
12. eading is immediately apparent rewire the motor accordingly ROTATION SHOULD BE COUNTER CLOCKWISE WHEN YOU ARE FACING THE PUMP INLET 5 The pump is now ready for operation STOPPING PUMP Once the power is shut off be sure water is stopped from entering the pump A solenoid valve in the seal water line is recommended to shut off flow simultaneously with cessation of pumping An inlet check valve is recommended to prevent vacuum loss or back flow to the system MAINTENANCE As a general rule maintenance is not required for AF pumps Because there are no rubbing parts and with water acting as coolant and lubrication during pumping wear is minimized It is recommended that the motor bearings be greased periodically in accordance with NEMA recommendations For further information refer to the Troubleshooting section To prevent foreign matter from entering the pump a strainer is recommended for the seal water line and the usual precautions taken in the pump inlet piping TROUBLESHOOTING PUMP WILL NOT TURN ON STARTUP 1 Check wiring and power to pump 2 Remove pump cover to check for anything that may be binding the rotor Be sure that the rotor turns freely by hand 3 On cast iron pumps check for internal rust if pump has been left idle for a long period Rust can build up to the point where internal clearances are closed Remove rust and reassemble 4 In areas where there is hard water being fed into the pump check for scale deposi
13. elf contained pumping system that fits almost anywhere for intermittent or low vacuum use The package includes a close coupled pump baseplate and a stainless steel separator tank with complete seal water and discharge piping HEAT EXCHANGERS For continuous high vacuum use a heat exchanger is recommended to counter the temperature rise from the heat of compression Higher seal water temperatures will increase the partial vapor pressure inside the pump and limit high vacuum performance Used in conjunction with water chillers refrigeration units fan coils or cooling towers a properly sized heat exchanger will maintain seal water temperatures for maximum performance Depending on the heat to be removed and cooling system available on location Tuthill Vacuum amp Blower Systems will specify or furnish a heat exchanger sized for your application OTHER ALTERNATIVES Among the other options for reusing liquid sealant are partial recirculation systems and specially packaged units using sealants other than water i e oil solvents etc In a partial recirculation loop a certain amount of make up water is fed into the pump to minimize temperature rise yet allow for substantial water savings For sealants other than water be sure to consult Tuthill Vacuum amp Blower Systems for assistance with both the pump and recirculation sizing Tuthill Vacuum amp Blower Systems invites you to inquire about specific practical and inexpensive methods
14. kets and stuffing boxes and a replaceable port cylinder for fast in the field repair Available in all bronze cast iron stainless steel and other special materials SERVICE AND PARTS AF pumps are 100 designed and manufactured in the United States All parts are maintained in inventory for immediate shipment from our factory in Springfield MO At the back of this manual is a list of parts and recommendations for spares to keep on hand The reputation of Tuthill Vacuum amp Blower Systems is staked on fast service and practical assistance in designing vacuum systems for specific applications Specializing in the liquid ring field the company was created by and for ENGINEERS SAVE WATER TIME AND MONEY WITH AF SEALANT RECOVERY SYSTEMS In applications where water is costly scarce or unavailable AF Sealant Recovery Systems provide simple compact and environmentally safe options for recirculating seal water and storing waste THE BASIC SYSTEM 4 The standard configuration for recirculating seal water is to pipe the pump discharge into a small separator tank where non condensed gas is vented into the atmosphere and the water is returned to the pump inlet By having a tee connection in the inlet piping for the return rather than through the separate seal water inlet the pump will draw its own water requirement controlled by a flow restrictor in the return line The basic system offered by Tuthill Vacuum amp Blower Systems is a completely s
15. ly can be regulated by either a flow restrictor or manually by valve The object is to balance performance against water consumption and power THE PUMP MUST NEVER RUN DRY The solenoid valve must be in an open Figure 3 Recirculated Seal Water position for pumping Tee into Inlet See Page 5 for additional information SINGLE VACUUM RANGE TWO STAGE VACUUM RANGE STAGE 0 10 Hg 10 25 Hg 25 Hg PUMP ALL RANGES PUMP 0 340 mbar g 340 840 mbar g 840 mbar g MODEL GPM L min MODEL GPM L min GPM L min GPM L min 7 6 11 4 7 6 13 2 T2010 11 4 15 1 15 1 18 9 1300 22 7 30 3 30 3 37 9 68 1 75 7 11 4 15 1 T10030 STARTUP 1 Once the pump is fully piped and wired for operation be sure no foreign matter may enter and possibly damage the pump Check for welding shot slag or other metal bits 2 Before starting the pump turn the motor shaft by hand to be sure it is free to rotate On TEFC motors you may turn the rear fan Some resistance during a full rotation is normal 3 Ifa hard rub is experienced and the motor shaft will not turn the pump should be checked internally for interference As long as the shaft can be turned by hand the pump is operable 4 Afinal check is to jog the motor making sure water is introduced into the pump and that rotation is in accordance with the arrow cast on the pump face If no flow of air or vacuum r
16. mery cloth for a smooth fit PUMP UNUSUALLY NOISY 1 Unusual continuing noise from the motor end is probably an indication that the motor bearings are bad Remove cover and spin rotor by hand You should be able to detect bearing noise If indicated replace motor bearings 2 Cavitation The vacuum pump should not be operated on blank suction for any length of time When liquid ring vacuum pumps are starved for air cavitation is indicated by a rattling noise and vibration in the pump Cavitation can be eliminated by providing slight air bleed into the vacuum system HIGH AMPS 1 Flooding the pump with too much water particularly at low vacuum can overload the motor Adjust seal water supply Internal rubbing of rotor with stationary parts can cause excessive loading Shut off pump and rotate by hand see Startup section to see if rotor turns freely Internal rubbing may be due to scale build up a galling foreign material or by misalignment of parts see Troubleshooting section specifically paragraphs titled PUMP WILL NOT TURN ON STARTUP amp POOR PUMP PERFORMANCE LOW VACUUM SERVICE AND REPAIR DISCHARGE AF liquid ring vacuum pumps are designed to minimize down time by allowing for fast in the field repair Time and money saving features include MECHANICAL SEAL Shaft mounted assembly for easy alignment and indicating Modern O rings and mechanical seals for practically zero leakage and easy replacement
17. on Models A10 A15 A20 T1505 and T2010 have a 1 NPT connection on their covers for direct piping The larger pumps feature flange faces An inlet check valve is recommended to prevent vacuum loss and backstreaming when the pump shuts down Avoid using spring loaded valves not designed for vacuum service An optional vacuum gauge can be mounted between the pump and check valve to measure inlet vacuum DISCHARGE PIPING Depending on the application there are a number of ways to handle the discharged liquid and gas If there are no pollutants the simplest scheme is to discharge directly into a drain An AF pump can carry up to a ten foot discharge head providing the piping from that height is pitched toward a drain or other receptacle EXCESSIVE BACK PRESSURE CAN ADVERSELY AFFECT PUMP PERFORMANCE A second method is to run the discharge through a mechanical separator removing water from the gas Water contaminated by sanitary waste or noxious gas may be recirculated as seal water or discharged into a sanitary sewer or tank The nature of the contaminant will determine how often recirculated water must be changed SEAL WATER PIPING Unless liquid is pumped directly through the vacuum inlet connection most applications require separate piping for seal water to enter the pump The seal water inlet is located directly below the vacuum inlet on the pump s face Water the most widely used liquid seal can be piped directly from a tap or recircul
18. on of the pump with discharge to outside atmosphere Venting of the discharge of an oil mist eliminator to outside atmosphere is highly recommended Do not restrict the pump discharge in any way or place valves in the discharge line The vacuum pump is a compressor and will generate high pressures without stalling the motor when operated at low suction pressures Excessive pressure could cause pump damage or serious bodily injury Disconnect the pump motor from the electrical supply at the main disconnect before disassembling or servicing the pump Make sure pump is completely reassembled the belt guard is properly installed and that all fill and drain valves are installed and closed before reconnecting the power supply Accidental starting or operation of the pump while maintenance is in progress could cause pump damage or serious bodily injury Lift pump only by the lifting lugs supplied with the pump DO NOT lift equipment attached to pump by the pump lifting lugs Do not touch hot surfaces on the pump In normal operation at low pressures surface temperatures will not normally exceed 180 F 82 C Prolonged operation at 200 Torr 267 mbar a may cause surface temperatures as high as 220 F 104 C TABLE OF CONTENTS SECTION PAGE INTRODUCTION 4 LIQUID RING VACUUM PUMPS PRINCIPLE OF OPERATION 4 SPECIAL FEATURES 4 SERVICE AND PART
19. properly installed exposes personnel in the vicinity of the pump to risk from rotating drive components CAUTION Do not operate the pump with oxygen enriched gas in the suction line unless the pump has been properly cleaned A inspected and certified to be free of hydrocarbon presence and prepared with an inert fluid suitable for the application e Oxygen enriched gas is defined as gas of which the constituents include by volume mol 96 an amount of oxygen greater than that of standard atmospheric air typically 20 2196 by volume If the oxygen content in the gas stream exceeds the proportions found in standard atmospheric air then it is considered an oxygen enriched gas and standard mineral oil synthetic hydrocarbon oil or other non inert fluids should not be used WARNING Pumping oxygen enriched gases with mineral oil synthetic hydrocarbon oil or other non inert fluids can cause fire or explosion in the pump resulting in damage or serious bodily injury or death Take precautions to avoid prolonged or excessive exposure to oil mist or process materials emanating from the discharge of the pump Do not allow the pump to discharge into a closed or inadequately ventilated room Always use a discharge oil mist eliminator unless the pump discharge is discharged to outside atmosphere Laws and ordinances may pertain to your local area regarding discharge of oil mist or vapor to atmosphere Check local laws and ordinances prior to operati
20. r than water vapor pressure in the pump can be reduced for high vacuum or compatibility achieved with specific process gases In some cases distillate or another fluid is introduced directly into the suction pump inlet and used as the liquid seal Liquid ring pumps are also commonly staged with positive displacement blowers air and steam ejectors for greater capacity and or deeper vacuum Tuthill Vacuum amp Blower Systems offers many such staged units including its patented AF two stage system with rotary blower liquid ring back up and unique fluid coupling design SPECIAL FEATURES One of the distinguishing features on an AF pump is an axial flow design that permits the widest range and highest vacuum of any single stage liquid ring pump A fixed port cylinder concentric with the rotor bore directs the gas along the shaft axis into the suction ports of the rotor and finally back through the rotor and rear of the pump for discharge Because the gas flow is along the motor shaft and not at right angles the pump can start in a flooded state without damage and has excellent water handling capacity The use of a shrouded rotor also increases pumping efficiency for high vacuum and low water consumption The pump head close coupled to a NEMA C face motor is extremely compact and requires no interstage manifold as do older style radial flow pumps Further advantages to AF pumps include the use of modern O Rings and mechanical Seals rather than gas
21. s needed and proceed as follows NOTE Numbers in parentheses refer to the drawing on page 10 STEP 1 SLEEVE AND SEAL ASSEMBLY The mechanical seal is composed of a seal seat 8a seal 8b and spring 8c The seat is a ceramic ring with a rubber boot that is pressed firmly into the rear of the casing Lubricant is recommended for ease in inserting rubber boot in the seal housing bore BE VERY CAREFUL NOT TO SCRATCH THE CERAMIC FACE DURING HANDLING AND INSERTION Once the seal seat is in place mount casing 1 on the motor face The larger pump casings are mounted on four studs extending from motor face while the smaller casings Models A5 A10 A15 A20 T0505 T1505 T2010 are secured by four hex head bolts It is seldom needed to replace the shaft sleeve It can usually be polished using fine emery cloth If the sleeve is to be replaced slip the small O ring 11 over shaft until it touches the shaft shoulder and place the sleeve bushing 9 on top so that its chamfered end presses against O ring To complete the assembly lubricate the sleeve so that the rest of the mechanical seal 8b can be pressed on with the carbon face in flat sliding contact with the ceramic seat Again AVOID SCRATCHING OR TOUCHING THE CARBON FACE Proper tension between the seal faces is provided by the spring leading to Step 2 STEP 2 ROTOR ASSEMBLY AND ALIGNMENT The rotor is secured to the shaft by means of a key 15 a hex head lock screw 13
22. this agreement must commence within one 1 year after the cause of action has occurred 14 June 2014 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 Accessories Supplied or in use Motor Sheave Diameter Motor RPM HP NOTES IMPORTANT All blowers manufactured by Tuthill Vacuum amp Blower Systems are date coded at time of shipment In order to assure you of the full benefits of the product warranty please complete tear out and return the product registration card or register online at tuthillvacuumblower com 15 16 A Tuthill e For Service amp Repair Technical Support or Product Sales contact Tuthill Vacuum amp Blower Systems 4840 West Kearney Street Springfield Missouri USA 65803 8702 0417 865 8715 800 825 6937 F 417 865 2950 tuthillvacuumblower com AVEM Wo Association of Vacuum Equipment Manufacturers Manual 1864 2 0315 ENG
23. ts that may hinder rotation Scale should be removed by acidizing but consult the factory for recommended procedures 5 If the motor fails to turn isolate the motor from the pump and re check the motor NO PUMPING ON STARTUP 1 Check pump rotation It may be rotating in reverse Rewire motor to correct 2 Check seal water Water must be fed continuously into the pump POOR PUMP PERFORMANCE LOW VACUUM 1 Check vacuum pump while running by sealing off inlet piping and reading vacuum at the pump suction If high vacuum is achieved look for leaks in the vacuum system The pump capacity is a function of high vacuum performance and will conform to the published performance curve at standard conditions High seal water temperatures will lower the vacuum because of the increase in vapor pressure Altitude barometric pressure and gas temperature can also affect high vacuum performance 2 If high vacuum is not achieved on blank off the problem lies in the vacuum pump Poor pump performance can be caused by the following a Pump may not be getting enough water Adjust water supply and observe for change in the performance b Internal parts may be worn Remove cover port cylinder assembly and check for wear on the port cylinder rotor and cover lands Most wear will be limited to the port cylinder which should slide easily into the rotor bore Replace port cylinder if necessary You may also polish the port cylinder and rotor bore with a fine e
24. ze getting any new piece of equipment up and running as quickly as possible is imperative to production WARNING Serious injury can result from operating or repairing this machine without first reading the service manual and taking adequate safety precautions LIQUID RING VACUUM PUMPS PRINCIPLE OF OPERATION The liquid ring vacuum pump removes gases by means of an impeller rotating freely in an eccentric casing The pumping is done by a liquid usually water that is fed into the pump and thrown by centrifugal force into a moving ring along the casing or cover wall When gas or vapor enters the suction port it is trapped by the whirling impeller blades and a liquid piston that expands in the eccentric lobe of the casing As the impeller rotates the liquid is then pushed inward by the narrowing space between rotor and casing compressing the trapped pocket of gas Finally the compressed gas is released through a discharge port as the impeller completes the revolution The direct contact between the liquid ring and the gas makes the pump ideal for wet applications and for handling condensibles that are discharged with the gas and liquid Unlike rotary vane and piston pumps the operation of a liquid ring vacuum pump is nearly isothermal and without vibration There is no oil to be changed or pollutant released into the environment Because there are no valves and no rubbing parts a liquid ring pump is virtually maintenance free With liquids othe
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