Series 111 Accumulator Product Information
Contents
1. MTS 102080 1 1100Y Series 111 Accumulator Product Information Model 111 11 Model 111 12 011 553 304 D be certain O 2013 MTS Systems Corporation All rights reserved MTS is a registered trademark of MTS Systems Corporation within the United States These trademarks may be protected in other countries All other trademarks or service marks are property of their respective owners Software use and license is governed by the MTS End User License Agreement which defines all rights retained by MTS and granted to the End User All Software is proprietary confidential and owned by MTS Systems Corporation and cannot be copied reproduced disassembled decompiled reverse engineered or distributed without express written consent of MTS MTS software is developed using established quality practices in accordance with the requirements detailed in the ISO 9001 standards Because MTS authored software is delivered in binary format it is not user accessible This software will not change over time Many releases are written to be backwards compatible creating another form of verification The status and validity of the MTS operating software is also checked during system verification and routine calibration of MTS hardware These controlled calibration processes compare the final test results after statistical analysis against the predicted response of the calibration standards With these established methods MTS assures its customers th2. Write down relevant information In case Technical Support must call you e Verify the notification number Record the name of the person who helped you Series 111 Accumulator Product Information 7 Write down any specific instructions After you call MTS logs and tracks all calls to ensure that you receive assistance for your problem or request If you have questions about the status of your problem or have additional information to report please contact Technical Support again and provide your original notification number 1 4 0 Problem Submittal Form in MTS Manuals Use the Problem Submittal Form to communicate problems with your software hardware manuals or service that are not resolved to your satisfaction through the technical support process The form includes check boxes that allow you to indicate the urgency of your problem and your expectation of an acceptable response time We guarantee a timely response your feedback is important to us You can access the Problem Submittal Form at www mts com gt Contact Us upper right corner gt In the Subject field choose To escalate a problem Problem Submittal Form 8 Series 111 Accumulator Product Information 2 0 Preface 2 1 0 Before You Begin Safety first Before you use your MTS product or system read and understand the safety information provided with your system Improper installation operation or maintenance can result in hazardous conditions that can ca
3. 34 Series 111 Accumulator Product Information 6 0 Maintenance Non MTS accumulators typically use either a poppet type valve or a core type valve 1 Determine which type of gas pressure valve is present on the accumulator and connect the charging kit chuck valve to the accumulator valve stem Open the locknut poppet type or chuck valve core type i Note The poppet type valve opens by turning the locknut counterclockwise and closes by turning the locknut clockwise To open a core type valve attach a chuck valve to the valve stem and turn the chuck valve handle clockwise to depress the valve core Close the valve by turning the handle counterclockwise Read the pressure on either the high or low accumulator charging kit pressure gage The low pressure gage is limited to approximately 1 4 MPa 200 psi by the gage protector lf the pressure reading is other than the required pressure level recorded on the accumulator go to the procedure Change the Precharge Pressure e Ifthe pressure level corresponds to the level recorded on the accumulator label close the locknut poppet type or close the chuck valve core type Continue to Step 4 Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator Replace the valve stem cap and protective cover on the accumulator 6 3 0 About Changing the Precharge Pressure The precharge of an accumulator mounted on a hydraul
4. Guidelines a 30 Check me Accumulator Pra AA 32 About Changing the Precharge Pressure a ct dea 35 Purge Halo fom the Gas Chamber nein 37 AN PA AA AA AA 38 Series 111 Accumulator Product Information 29 6 0 Maintenance 6 1 0 Series 111 Accumulator Maintenance Guidelines Maintaining the proper pressure level for your accumulators is essential for optimum system performance and component life Review the following figure to familiarize yourself with the accumulator components and their locations Also review the following guidelines before performing any procedure oy Accumulator Components Item Description 1 Screws 2 Accumulator valve assembly 3 Accumulator valve protective cover 4 Valve stem cap 5 Locknut 6 End cap 7 Chamber 8 Piston 9 Hydraulic fluid end cap 10 Hydraulic fluid port 11 Locking pin Use the following guidelines to determine when maintenance is reguired e Check the precharge pressure at periodic intervals The length of time between checks depends on how the system is used Some factors to consider when establishing this time interval are operating frequency 30 Series 111 Accumulator Product Information 6 0 Maintenance displacement and duration Start with one month intervals until you determine that another interval is more appropriate Maintain a log book on the condition of the precharge at each check Use this data to determine if the time betwe
5. any parts except the protective cover and valve stem cap are removed Ensure that system hydraulic pressure has been reduced to zero before proceeding To do this turn off the hydraulic power unit and exercise the actuator until it stops moving Close the bleed valve on the accumulator charging kit Remove the protective cover and valve stem cap from the accumulator see Accumulator Components and the figure below Check the precharge depending on the kind of accumulator on your system a For an MTS Series 111 Accumulator see Check the Series 111 Accumulator Precharge b For anon MTS accumulator see Check a Non MTS Accumulator Precharge 32 Series 111 Accumulator Product Information 6 0 Maintenance m Il Accumulator Precharge Item Description 1 High Pressure Gage 0 21 MPa 0 3000 psi 2 Low Pressure Gage 0 2 1 MPa 0 300 psi 3 Gage Protector factory set to limit pressure to the gage to approximately 1 4 MPa 200 psi 4 Extension Hose 5 Check Valve This valve will be either a poppet type valve or a core type valve 6 Locknut 7 Valve Stem 8 Poppet Type Valve To Open and Close Use Chuck Valve C Close O Open 9 Valve Core 10 Valve Stem 11 Core Type Valve To Open and Close Use Chuck Valve O Open Series 111 Accumulator Product Information 33 6 0 Maintenance Item Description C Close 12 Customer supplied items 13 Nitroge
6. begins to drop the accumulator in the hydraulic service manifold HSM immediately supplies part of the fluid volume and maintains the line pressure Then when the servovalve closes the hydraulic power supply HPS recharges the accumulator causing fluid in the lines to remain in motion The pattern and frequency of the signal that drives the servovalve will have considerable effect on the HSM accumulator efficiency Square wave signals for example cause a greater demand than sine wave signals or ramp signals Series 111 Accumulator Product Information 15 3 0 Introduction At some frequencies fluid flow in the lines may stop completely and overcoming the fluid inertia may become a more significant operational factor An accumulator in the return line damps the pulsing effect caused by slugs of fluid being injected into the line as the actuator moves Movement of hoses or hammering of hard lines is also reduced 3 4 0 Series 111 Accumulator Specifications The following tables list the specifications for the Series 111 Accumulators Product Specifications Parameter Model 111 11B Model 111 12C Minimum burst pressure 83 MPa 12 000 psi 138 MPa 20 000 psi Rated fatigue pressure 21 MPa 3000 psi 22 MPa 3200 psi Operating temperature 40C to 93 3 C 40 F to 200 F Hydraulic fluid Petroleum based hydraulic fluid Contact MTS for use with other fluids Dry nitrogen Dry nitrogen 14 Note Specification
7. do not necessarily represent your actual system configuration test application or software Electronic manual conventions This manual is available as an electronic document in the Portable Document File PDF format It can be viewed on any computer that has Adobe Acrobat Reader installed 10 Series 111 Accumulator Product Information Hypertext links The electronic document has many hypertext links displayed in a blue font All blue words in the body text along with all contents entries and index page numbers are hypertext links When you click a hypertext link the application jumps to the corresponding topic Series 111 Accumulator Product Information 11 3 0 Introduction Topics Ea AA AN 14 DUE VORBEI ERM ummi AA a 14 E FUN AN An do u A ee 15 Senes 111 Accumulator SUECOS nenne eier 16 Series 111 Accumulator Product Information 13 3 0 Introduction 3 1 0 Introduction The MTS Series 111 Accumulators stabilize the hydraulic lines in your system There are two models available The Model 111 11B Accumulator is a boss port mounted accumulator that requires a boss adapter fitting for mounting The Model 111 12C Accumulator is bolt mounted to a flange and typically has a larger nitrogen gas capacity than the Model 111 11B 3 2 0 What you need to know MTS Systems Corporation assumes that you know how to use your controller See the appropriate manual for information about performing any controller related st
8. 1 Accumulator Product Information 4 0 Safety Label Description Skin injection hazard release of fluid pressure High pressure fluid and penetrate skin Do not tamper with fittings or hoses Wear appropriate protection such as safety goggles and gloves Maintain safe pressure levels Series 111 Accumulator Product Information 23 5 0 Installation Topics About the Series 111 Accumulator Installation Procedure 1 a 26 Series 111 Accumulator Product Information 25 5 0 Installation 5 1 0 About the Series 111 Accumulator Installation Procedure There are two models of the Series 111 Accumulator The following figure shows the typical mounting configuration for the Models 111 11B and 111 12C Accumulators The Model 111 11B Accumulator is mounted with a boss adapter fitting and O ring seals When the accumulator is ordered as a component the boss adapter and O ring seals are not included with the accumulator they must be purchased separately e The Model 111 12C Accumulator is flush mounted with four bolts and O ring seal s When the accumulator is ordered as a component the four bolts grade 8 and O ring seal s maximum size 54 28 mm 2 137 in outside diameter 47 22 mm 1 859 in inside diameter are not included with the accumulator and must be purchased separately i uut di N lt A O N _ SASI ae CEPD 2 4 a A a ED Mounting Configura
9. 2 7 5 0 10 16 1 1 2SAE 21 77 4 0 4 bolt flange 48 0 a 111 12C 04 3 81 1gal 61 93 24 4 12 7 5 0 10 16 1 1 2SAE 29 87 4 0 4 bolt flange 65 8 The following cross section figures illustrate the difference between the accumulator models Y N N D a 1 1 pf U ia pe N A N Y 7 gt rig no 11 e u y O e So Model 111 11B Accumulator Cross Section Series 111 Accumulator Product Information 17 3 0 Introduction Item Description 1 1 563 in 39 7 mm 2 Length 3 Typical Boss Adapter Fitting 4 Locking Pin 5 Hydraulic Fluid Port 6 Relief Vent 7 Accumulator Valve Assembly 8 Protective Cover Model 111 12C Accumulator Cross Section Item Description 1 1 563 in 39 7 mm 2 Length 3 1 406 in 35 7 mm 4 0 703 in 17 8 mm 5 2 750 in 69 9 mm 6 1 375 in 34 9 mm 7 1 2 13UNC 2B 8 Locking Pin 18 Series 111 Accumulator Product Information 3 0 Introduction Item Description 9 Hydraulic Fluid Port 10 Relief Vent 11 Accumulator Valve Assembly 12 Protective Cover Series 111 Accumulator Product Information 19 4 0 Safety Topics e ida FISCERIGI Ec iin 22 Series 111 Accumulator Product Information 21 4 0 Safety 4 1 0 Hazard Placard Placement Hazard placards contain specific safety information and are affixed directly to the system so they are pl
10. Warning notices indicate the presence of a hazard with a medium level of risk which if ignored can result in death severe personal injury or substantial property damage Series 111 Accumulator Product Information 9 CAUTION Caution notices indicate the presence of a hazard with a low level of risk which if ignored could cause moderate or minor personal injury or equipment damage or could endanger test integrity Other special text conventions Important Important notices provide information about your system that is essential to its proper function While not safety related if the important information is ignored test results may not be reliable or your system may not operate properly Note R Notes provide additional information about operating your system or highlight easily overlooked information Recommended ES Recommended notes provide a suggested way to accomplish a task based on what MTS has found to be most effective a gt Tip Tips provide helpful information or a hint about how to most efficiently accomplish a task Access Access provides the route you should follow to a referenced item in the software Example Examples show specific scenarios relating to your product and appear with a shaded background Special terms The first occurrence of special terms is shown in italics Illustrations Illustrations appear in this manual to clarify text They are examples only and
11. ainly visible Each placard describes a system related hazard When possible international symbols icons are used to graphically indicate the type of hazard and the placard label indicates its severity In some instances the placard may contain text that describes the hazard the potential result if the hazard is ignored and general instructions about how to avoid the hazard The following labels are typically located on the accumulator Label Description DANGER Accumulator Nitrogen gas under pressure Improper testing of precharge or disassembly without releasing nitrogen gas can cause severe injury or death Release gas before disassembly A DANGER Read instructions before testing or servicing Nitrogen gas under pressure Improper testing of precharge or disassembly without releasing nitrogen gas can cause severe injury or death Release gas before disassembly Read instructions before 4 testing or servicing PN 034533 0 WARNING A WARNING High pressure vessel High pressure vessel Rapid discharging from disconnecting or disassembly can result in personal injury or Rapid discharging from disconnecting death See service manual for tools and A CAN AMAAN IA parsona instruction for relieving pressure or charging injury or death Precharge only with dry nitrogen gas See service manual for tools and instruction for relieving pressure or charging Precharge only with dry nitrogen gas 22 Series 11
12. at MTS products meet exacting quality standards when initially installed and will continue to perform as intended over time Contents 1 0 Technical Support 1 10 How to Get Technical Spt kn a aa u a ein 5 1 24 Betors Yon Contaci MT Srta otot yrket base ee a 5 LABIO EEE MITS Dy Plate ae Erika 7 1 44 Problem Submittal Form im MIS Rama amu 8 2 0 Preface ARE TO TA AA AAA 9 2 28 Documentation CATAS A A Aaa 9 3 0 Introduction LI TO AA AA 14 3 2 What oa ee 14 E A A 15 34 0 Series 111 Accumulator Specifications oi ii iia 16 4 0 Safety 31 0 Hazard Placard Plisson ida 92 5 0 Installation 5 1 0 About the Series 111 Accumulator Installation Procedure eereeoveenvennenvooee sven eo vene 26 5 1 1 0 Series 111 Accumulator Installation Procede 27 6 0 Maintenance 6 1 0 Series 111 Accumulator Maintenance Guidelines ci do 30 620 Check a A A Eesi 32 6 2 1 0 Check the Series 111 Accumulator Precharge nico an ore ahnen ie 34 6 2 2 0 Check a Non MTS Accumulator Preoharge acia an aa 34 Kab bait Changing the PEDALES PES A A A amka 35 63 14 Desrease De Precharee POSSE a avaavan 35 6 320 Increase the Precharge PRESSE ee 36 64 0 Purge Fluid from the Gas Chamber a aa af 050 Remove a Ca a 38 Series 111 Accumulator Product Information 3 1 0 Technical Support 1 1 0 How to Get Technical Support Start with your manuals The manuals supplied by MTS provide most of the information you need to use and maintain you
13. e Immediately close the regulator shut off valve before the pressure reading on either the high or low charging kit pressure gage exceeds the pressure level of the accumulator Open the locknut or open the chuck valve for a core type valve Slowly open the regulator shut off valve until the pressure indicator on either the high or low charging kit pressure gage begins to rise When the pressure is at the required pressure level recorded on the accumulator close the regulator shut off valve Close the locknut or close the chuck valve for a core type valve Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator 10 Install the valve stem cap and protective cover Close the valve on the nitrogen bottle 36 Series 111 Accumulator Product Information 6 0 Maintenance 6 4 0 Purge Fluid from the Gas Chamber Piston type accumulators may collect hydraulic fluid in the gas chamber which then reduces the gas volume of the accumulator The fluid should be purged from the gas side if a pressure check procedure shows one or more of the following A consistent trend of pressure being higher than expected Precharging requires smaller volumes of gas than expected to obtain a desired pressure level Fluid is expelled from a gas valve during gas venting Caution Venting pressurized gasses can generate loud noises and freezing temperatures Transferring gasses from high to low pressure container
14. e cover and valve stem cap are removed 1 Ensure system hydraulic pressure has been reduced to zero before proceeding To do this turn off the HPS and turn on low pressure at the controller Exercise the actuator until it stops moving Then turn off the electrical power 2 Place a drain pan under the accumulator to be removed 3 To prevent contamination of the hydraulic fluid cover any ports that are exposed 4 If you have the Model 111 12C Accumulator use a hex key to remove the flange and accumulator mounting bolts see Actuator Components If you have the Model 111 11B Accumulator use an open end and strap wrench to loosen the accumulator from the boss adapter fitting 5 Perform any required maintenance see the other procedures in this section 6 To reinstall the accumulator see Series 111 Accumulator Installation Procedure 38 Series 111 Accumulator Product Information MTS TESS MTS Systems Corporation 14000 Technology Drive Eden Prairie Minnesota 55344 2290 USA Toll Free Phone 800 328 2255 within the U S or Canada Phone 952 937 4000 outside the U S or Canada Fax 952 937 4515 E mail info mts com Internet www mts com ISO 9001 Certified QMS
15. en checks should be increased or decreased and if maintenance is required Because the precharge pressure level varies with a temperature change the level should always be checked at the same temperature If it is not use one of the following formulas to determine if the precharge level is acceptable o 2 3 current temperature 273 current pressure original pressure x 273 original temperature 27 N O Degrees Celsius Item Description Current pressure Original pressure 273 current temperature 273 original temperature O o current pressure original pressure x paaa ad 1460 original temperature 4 NG Degrees Fahrenheit Item Description Current pressure Original pressure 460 current temperature 460 original temperature If a pressure line accumulator has a pressure level change of 1 4 MPa 200 psi between checks the accumulator requires maintenance or the time interval between checks needs to be shortened If a return line accumulator has a change of 50 of the original pressure level between checks the accumulator requires maintenance or the time interval between checks needs to be shortened If the precharge pressure level increases at each check interval this indicates that fluid is collecting on the gas side a small amount of fluid leakage is normal When the precharge pressure level cannot be Series 111 Accumulator P
16. ep in this manual s procedures You are expected to know how to perform the following procedure e Turn hydraulic pressure on and off Selecta control mode e Manually adjust the actuator position 14 Series 111 Accumulator Product Information 3 0 Introduction 3 3 0 Functional Description Series 111 Accumulators can reduce fluctuations in hydraulic lines due to sudden changes in hydraulic flow rate They also act as a short term energy source for high rate tests by providing additional hydraulic flow for short periods to meet irregular peak demands Like a capacitor accumulators filter out pulses in the hydraulic fluid to provide steady hydraulic pressure Accumulators are like a hydraulic version of a capacitor They are hydro pneumatic devices located at strategic points in a hydraulic system They may be connected to the pressure line and to the return line 000 o Accumulator Item Description 1 Nitrogen Side 2 Piston 3 Fluid Side 4 Hydraulic Fluid Accumulators are precharged with pressure Precharge pressure is the pressure of the compressed gas usually nitrogen before hydraulic fluid is introduced Inserting accumulators into the hydraulic lines permits some fluid to be stored under pressure a short distance from the servovalve and actuator This has the effect of keeping fluid in the lines in motion and reducing the inertia and line restriction considerations When the servovalve opens and line pressure
17. he accumulator Install the valve stem cap and protective cover 6 3 2 0 Increase the Precharge Pressure See Check the Accumulator Precharge to determine if you need to change the precharge pressure 1 2 3 7 8 9 Close the locknut on the accumulator or close the chuck valve for a coretype valve Open the bleed valve two turns Warning Mixing gases can produce unpredictable results Do not use another gas to precharge an accumulator Use only dry nitrogen gas to precharge accumulators Connect the nitrogen supply hose from the supply bottle pressure regulator output to the input check valve on the charging kit Open the nitrogen bottle valve Check the nitrogen bottle pressure gage on the regulator The bottle must contain sufficient pressure to provide an adequate gas volume Monitor the regulator output pressure gage and adjust the regulator output pressure valve to the required level Caution Rapid flow rates with pressure differentials of more than 2 1 MPa 300 psi across the input check valve can damage the valve seal s Avoid rapid and extreme pressure transitions Do not allow rapid flow rates Open the regulator shut off valve only far enough to permit a gradual transfer of gas Slowly open the regulator shut off valve until gas is heard escaping from the accumulator charging kit bleed valve Allow gas to slowly escape for approximately ten seconds and then close the bleed valv
18. ic supply line often is increased to enhance system performance and reduce the transient HPS flow demands Accumulators may be precharged to 10 MPa 1500 psi or more although amounts above 14 MPa 2200 psi will have less and less performance effect in most situations Be sure that you read the following warning before you charge your accumulator Warning Accumulators have specific pressure ratings If the precharge pressure is too high the accumulator can bottom out causing the release of metal particles into the hydraulic fluid Charging accumulators above their rated level can damage system equipment Do not charge accumulators to pressures above their rated level Charge accumulators below their rated fatigue pressure of 21 MPa 3000 psi for the Model 111 11B and 22 MPa 3200 psi for the Model 111 12C Use a suitable regulator and gage set to an accumulator s charges 6 3 1 0 Decrease the Precharge Pressure See Check the Accumulator Precharge to determine if you need to change the precharge pressure Series 111 Accumulator Product Information 35 6 0 Maintenance Slowly open the bleed valve on the accumulator charging kit until gas begins to escape When the pressure reading on the appropriate pressure gage drops to the level required close the bleed valve Close the locknut or close the chuck valve if you have a core type valve Open the bleed valve on the accumulator charging kit and remove the chuck valve from t
19. mber This information can typically be found in the About selection in the Help menu The names of other applications on your computer such as Anti virus software e Screen savers 6 Series 111 Accumulator Product Information e Keyboard enhancers Print spoolers Messaging applications 1 3 0 If You Contact MTS by Phone A Call Center agent registers your call before connecting you with a technical support specialist The agent asks you for your Site number Name Company name Company address Phone number where you can be reached If your issue has a notification number please provide that number A new issue will be assigned a unique notification number Identify system type To enable the Call Center agent to connect you with the most gualified technical support specialist available identify your system as one of the following types Electrodynamic material test system Electromechanical material test system e Hydromechanical material test system e Vehicle test system e Vehicle component test system Aero test system Be prepared to troubleshoot Prepare to perform troubleshooting while on the phone e Call from a telephone close to the system so that you can implement suggestions made over the phone e Have the original operating and application software media available If you are not familiar with all aspects of the equipment operation have an experienced user nearby to assist you
20. n Bottle Valve 14 Nitrogen Bottle 15 Nitrogen Bottle Pressure Gage 16 Regulator Output Pressure Gage 17 Regulator Output Pressure Valve 18 Regulator Shut Off Valve 19 Nitrogen Supply Hose 20 Input Check Valve 21 Bleed Valve O Open C Close 6 2 1 0 Checkthe Series 111 Accumulator Precharge This procedure is a continuation of Check the Accumulator Precharge Steps 1 3 of that procedure should be preformed before completing this procedure The Series 111 Accumulators use the poppet type valve 1 Connect the charging kit chuck valve to the accumulator valve stem 2 With an open end wrench turn the locknut counterclockwise on the accumulator valve assembly to open the valve Read the pressure on either the high or low accumulator charging kit pressure gage e lf the pressure reading is other than the required pressure level recorded on the accumulator go to the procedure Change the Precharge Pressure e Ifthe pressure level corresponds to the level recorded on the accumulator label turn the locknut clockwise to close the valve and continue this procedure 3 Open the bleed valve on the accumulator charging kit and remove the chuck valve from the accumulator 4 Replace the valve stem cap and protective cover on the accumulator 6 2 2 0 Check a Non MTS Accumulator Precharge This procedure is a continuation of Check the Accumulator Precharge Steps 1 3 of that procedure should be preformed before completing this procedure
21. ot know your MTS site number contact your sales engineer Example site number 571167 When you have more than one MTS system the system job number identifies your system You can find your job number in your order paperwork Example system number US1 42460 Know information from prior technical assistance If you have contacted MTS about this problem before we can recall your file based on the e MTS notification number Name of the person who helped you Identify the problem Describe the problem and know the answers to the following questions How long and how often has the problem occurred Can you reproduce the problem Were any hardware or software changes made to the system before the problem started e What are the equipment model numbers e What is the controller model if applicable e What is the system configuration Know relevant computer information For a computer problem have the following information available e Manufacturer s name and model number Operating software type and service patch information Amount of system memory Amount of free space on the hard drive where the application resides e Current status of hard drive fragmentation e Connection status to a corporate network Know relevant software information For software application problems have the following information available The software applications name version number build number and if available software patch nu
22. r equipment If your equipment includes software look for online help and README files that contain additional product information Technical support methods MTS provides a full range of support services after your system is installed If you have any questions about a system or product contact Technical Support in one of the following ways Web site www mts com gt Contact Us upper right corner gt In the Subject field choose To escalate a problem Problem Submittal Form E mail Worldwide tech support mts com Europe techsupport europe mts com Telephone Worldwide 1 800 328 2255 toll free in U S 1 952 937 4000 outside U S Europe 800 81002 222 International toll free in Europe Outside the U S For technical support outside the United States contact your local sales and service office For a list of worldwide sales and service locations and contact information use the Global MTS link atthe MTS web site www mts com gt Global Presence gt Choose a Region 1 2 0 Before You Contact MTS MTS can help you more efficiently if you have the following information available when you contact us for support Series 111 Accumulator Product Information 5 Know your site number and system number The site number contains your company number and identifies your equipment type such as material testing or simulation The number is typically written on a label on your equipment before the system leaves MTS If you do n
23. roduct Information 31 6 0 Maintenance maintained within the limits remove the fluid and charge the accumulator If the levels are again exceeded at the first check interval replace the piston seals after the initial fluid has been changed If the precharge pressure level decreases at each check interval this indicates gas leakage to the fluid side When the precharge pressure level cannot be maintained within the limits stated in the previous guidelines replace the accumulator piston seals During normal operation the accumulator piston should be near the center of the accumulator cylinder To check the approximate piston location note the warm to hot transition point on the accumulator cylinder wall during operation If the piston is near the charging stem end the accumulator may need charging If the piston is at the other end the accumulator may have an excess charge or more likely an excessive amount of hydraulic fluid has collected in the gas chamber 6 2 0 Check the Accumulator Precharge The following equipment is required for any Series 111 Accumulator Accumulator charging kit MTS part number 376986 01 1 Warning Accumulators are pressurized devices Pressurized accumulators and their parts can become lethal projectiles if disassembled and can cause death to persons and or damage to equipment Do not remove an accumulator that is pressurized Completely remove hydraulic pressure and discharge the accumulator before
24. s are subject to change without notice Contact MTS Systems Corporation for verification of specifications critical to your needs Capacity Dimension and Weight i Nitrogen Gas t t t Hydraulic Maxp Model Length A B ve Capacity Fluid Port E Connection cm in cm in cm kg Ibs in 111 11B 01 3 mid 15 54 6 12 7 87 31 635 12SAE 4 26 2 seems taling 2 5 1 1 16 12 9 4 UNF 2B The models listed in this table are considered standard models Other models may be manufactured with different capacities lengths or hydraulic fluid port connections than listed here Contact MTS Systems Corporation for information on nonstandard models t See the related cross section figures Standard pressure series Code 61 16 Series 111 Accumulator Product Information 3 0 Introduction i Nitrogen Gas t t t Hydraulic Maxp Model Length A B i Capacity SUN Fluid Port A Connection cm in cm in cm kg Ibs in 111 11B 02 3 18 08 7 12 7 87 3 1 635 12SAE 4 63 164 cm 1 a po 2 5 1 1 16 12 10 2 in 3 UNF 2B 111 11B 03 3 27 94 11 0 7 87 3 1 6 35 16SAE 5 94 475 1 pt RAGU 2 5 1 5 16 12 13 1 UNF 2B 111 11B 04 3 42 88 16 9 7 87 3 1 635 20SAE 7 98 950 cm 1 at d e 2 5 1 5 8 12 17 8 UNF 2B 111 12C 02 950 cm 1 at 29 51 11 6 12 7 5 0 10 16 1 1 2SAE 18 45 4 0 4 bolt flange 40 6 111 12C 03 1 91 0 5gal 39 07 15 4 1
25. s creates freezing temperatures Do not work with pressurized gasses without wearing protective clothing Wear heavy gloves safety glasses and ear plugs when working with pressurized gases 1 Ifthe valve stem of the accumulator is facing down go directly to Step 2 If the valve stem of the accumulator is facing up or the accumulator is on its side remove the accumulator as described in Remove the Accumulator and turn it so that the valve stem is facing down 2 Remove the accumulator valve protective cover and the valve stem cap Securely position the accumulator with the gas valve down 3 Place a suitable container under the valve stem to capture any expelled fluid Use an open end wrench and open the locknut on the accumulator valve assembly two or three full turns Allow gas pressure to reduce to zero and any hydraulic fluid to be expelled 4 Replace the accumulator as described in the Installation chapter Then precharge the accumulator as described in Change the Precharge Pressure Series 111 Accumulator Product Information 37 6 0 Maintenance 6 5 0 Remove the Accumulator Warning Accumulators are pressurized devices Pressurized accumulators and their parts can become lethal projectiles if disassembled and can cause death to persons and or damage to equipment Do not remove an accumulator that is pressurized Completely remove hydraulic pressure and discharge the accumulator before any parts except the protectiv
26. tions Item Description A Model 111 11 B 1 Boss Adapter Mounting O rings B Model 111 12C 26 Series 111 Accumulator Product Information 5 0 Installation Item Description 1 Flange Mounting Bolt 2 Flange Mounting O rings 3 Accumulator Mounting Bolts 4 5 1 1 0 Series 111 Accumulator Installation Procedure Required equipment The following equipment is required for accumulator installation Open end wrench and strap wrench for the Model 111 11B Hex key set and torque wrench for the Model 111 12C 7 Note When installing a replacement accumulator into an existing system the replacement accumulator should be precharged to the same pressure level as the accumulator being removed Be sure that this precharge level is recorded on the label of the replacement accumulator Mount the accumulator in the system after lubricating the mounting O ring seal s Note the O ring seal configuration For the Model 111 11B Accumulator Thread the unit onto the boss adapter fitting and securely tighten it with a strap wrench For the Model 111 12C Accumulator Lubricate and torque the four mounting bolts in increments according to the pattern shown in the Mounting Configurations figure to a final torque of 108 Nm 80 Ibf ft Check the accumulator precharge pressure as described in the related procedure Series 111 Accumulator Product Information 27 6 0 Maintenance Topics e Series 111 Accumulator Maintenance
27. use severe personal injury or death or damage to your equipment and specimen Again read and understand the safety information provided with your system before you continue It is very important that you remain aware of hazards that apply to your system Other MTS manuals In addition to this manual you may receive additional manuals in paper or electronic form You may also receive an MTS System Documentation CD It contains an electronic copy of the manuals that pertain to your test system Controller and application software manuals are typically included on the software CD distribution disc s 2 2 0 Documentation Conventions The following paragraphs describe some of the conventions that are used in your MTS manuals Hazard conventions Hazard notices may be embedded in this manual These notices contain safety information that is specific to the activity to be performed Hazard notices immediately precede the step or procedure that may lead to an associated hazard Read all hazard notices carefully and follow all directions and recommendations Three different levels of hazard notices may appear in your manuals Following are examples of all three levels for general safety information see the safety information provided with your system A DANGER Danger notices indicate the presence of a hazard with a high level of risk which if ignored will result in death severe personal injury or substantial property damage WARNING
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