AccumulatorManual - Pumps & Pressure Inc.
Contents
1. INSPECTING THE CONDITION OF DELIVERY After unpacking the accumulator inspect it for possible damage caused during transit 1 Inspect the Locknut and the Jamnut and bleeder plug for tightness 2 Check the precharge tag The accumulator is either precharged to 25psi 1 7 bar for shipping purpose or charged to a pressure specified on the purchase order 3 Check that the working pressure stamped on the accumulator shell is equal to or greater than the maximum pressure of the system PROTECTION amp PRECAUTIONS 1 Protective Gloves Use chemical resistant gloves if needed to avoid prolonged or repeated skin contact from the clean ing solutions or solvents 2 Eye protection Use safety glasses before performing any maintenance on the accumulator OTHER PRECAUTIONS DO NOT operate the accumulator beyond the allowable working pressure and temperature limitations stamped or attached to the product Use only the tools recommended in this manual to perform the maintenance procedures Use only DRY NITROGEN for charging accumulator NEVER USE OXYGEN OR AIR due to risk of explosion Use only valve cores approved for accumulator service and NEVER USE AN AUTOMOTIVE TYPE VALVE CORE PRECHARGING 1 Use DRY NITROGEN ONLY to precharge the accumulator 2 Use the charging assembly recommended in this manual to charge the accumulator to the required precharge if it is not already charged at the factory 3 Check the charg2. cohol or equivalent Inspect the bladder for any visual damages Replace if necessary 1 Squeeze the bladder to discharge air from it by 2 Then install the valve adaptor to a torque value of Check that there is no corrosion inside or outside of rolling it up from the bottom 90 in lbs 10 Nm For the two piece valve stem the shell Replace all parts considered defective design The O Rings and back up rings must be replaced 3 Then install the valve core to a torque value of 4 Lubricate the accumulator shell and the bladder 5 Reinstall the name plate and the jamnut Do not 4 in lbs 45 Nm For the one piece valve stem either with the medium used in the system or a simi tighten the jamnut design lar product Attach the bladder pull rod to the valve and fold the bladder and pull into the shell Avoid twisting the bladder while pulling it into the shell 6 Insert the fluid port and the anti extrusion ring into 7 Slide the anti extrusion ring over the fluid port 8 Install a charging and gauging assembly on the the shell Pull the fluid port through the port opening gas valve and put a low precharge of 30 psig 2 bar to seat the fluid port and the anti extrusion ring in place 9 Hammer slightly the fluid port body at various 10 Install the metal back up O ring rubber back up 11 Tighten the locknut angles using plastic hammer and spacer in that order 12 Install the bleeder p
3. ing valve for leaks using snoop or soap water 4 Tighten the jamnut atthe gas valve stem and also the locknut on the fluid port with a wrench 5 Tighten the protective cap on the gas valve stem to hand tight 6 Check the gas precharge pressure periodically This must be done after all the hydraulic system pressure is released The precharge must be checked once in the first week of operation and then every six months dur ing normal working or every month during high cycling or high temperature condition INSTALLATION The accumulator should be mounted vertically with fluid port on bottom and gas valve on top with supporting brack ets and saddles specifically designed for accumulator mounting For other type of mounting consult factory Fluid port must not be used to support the accumulator Do not weld any support to the accumulator For ease of maintenance and periodic checking of the precharge an automatic discharge valve fitted between the accumulator and the system pressure line is recommended Shell Bladder Plug amp Poppet Assembly Anti Extrusion Ring Metal Back Up Ring O Ring Rubber Back Up Not available for 1 quart and 1 gallon sizes et ee OD m TOOLS 1 2 3 4 Charging amp Gauging Assy P N CG 3000 Valve Core Tool PN 11 501 Spanner Wrench PN 11 502 Open End Box Wrench Corresponds to valve stem wrench flats width 5 Open End Box Wrench Correspond
4. lug and tighten it 13 Rotate the accumulator shell around its axis to lubricate its inner wall evenly all around 14 Using a charging and gauging assembly 15 Remove charging and gauging assembly install precharge to the desired pressure at a moderate rate valve cap and protective cap Retighten the using DRY NITROGEN only Check the valve for Assembly locknut amp jamnut leaks with snoop or soap water STORAGE Accumulator storage instructions lf after reassembly the accumulators are stored they must be charged with a low nitrogen pressure of 25 psi 1 5 bar and store in a cool and dry area The fluid port must be sealed The accumulator can be stored in any position The protective cap on the gas charging valve must be securely tightened to protect it from any shock Attach a label to the accumulator stating that they must be precharged before installing in the system lf the accumulator is stored for longer than 6 years all the elastomeric components bladder seals etc must be replaced BLADDER STORAGE INSTRUCTIONS DO NOT OPEN PLASTIC BAG UNTIL READY FOR INSTALLATION DO NOT USE RAZOR OR SHARP OBJECTS TO OPEN THE PLASTIC BAG Bladder in the plastic bag must be stored in a cool preferably below 72 F dry and dark place out of direct sunlight fluorescent light ultraviolet light and away from electrical and welding equipment Direct sunlight or fluorescent light may cause the bladder to weather check and or dry r
5. ort body into the shell and remove the back up ring O ring and the metal back up ring 7 Remove the bleeder plug from the fluid port 8 Remove the locknut and then remove the spacer Loosen locknut with a spanner wrench by turning 2 or 3 threads then push the fluid port body into the accumulator shell if there is no hydraulic pressure Pe 5 10 Slide the anti extrusion ring off of the fluid port Carefully fold the anti extrusion ring until it s suffi ciently folded to allow removal from the shell and re move fluid port from the shell 11 By squeezing the bladder discharge as much air as possible by hand then pull the bladder out slowly through the fluid port opening of the shell If the fluid port body does not go inside then there is some hydraulic pressure left inside the accumulator If this happens do not attempt to do any maintenance Consult the factory ASSEMBLY Cleaning amp Inspection Clean all the metallic parts of the accumulator with an organic solvent Avoid exposing the rubber parts to the solvent to prevent any attack on the rubber Inspect the condition of the metallic components of the fluid port poppet spring stop nut and piston and replace the complete fluid port assembly if any of the components are damaged Push the poppet valve head to make sure it slide freely through the guide in the fluid port Clean the bladder with isopropyl al
6. ot which appears on the bladder Surface as cracks 11505 West Little York Houston Texas 77041 Tel 713 937 8900 copyright 1994 OilAir Hydraulics Inc OLAER GROUP COMPANY OILAIR ORIGINAL EQUIPMENT LIMITED WARRANTY OILAIR warrants each of its products against original defects in materials and or workmanship and will repair or replace any product which is determined by OILAIR within one 1 year of its installation to be defective or below the manufacturing standards of OILAIR including warranty of merchantability fitness for the purpose intended consequential and incidental damage of liability This Original Equipment Warranty which anticipates instal lation by third parties expressly excludes warranty of merchantability fitness for the purpose and consequential or incidental damage liability OPERATION OF ANY OILAIR ACCUMULATOR OR COMPONENT BEYOND THE MANUFACTURER S WORKING PRESSURE LIMITATIONS OR INVIOLATION OF ANY OPERATING OR SERVICE INSTRUCTION STAMPED OR ATTACHED TO THE PRODUCT EXPRESSLY VOIDS THIS WARRANTY AND MAY BE DANGEROUS TO LIFE AND PROPERTY Fax 713 937 0438 937 1516 Printed in USA Bulletin MMM94
7. s to hex jamnut size OLAER GROUP COMPANY 10 Valve Cap 12 13 14 co Instruction Manual for the Accumulator Spacer Locknut Name Plate Hex Jamnut Protective Cap Bleeder Plug Ratchet Wrench Corresponds to elastic stop nut and bleeder plug size Bladder Pull Rod PN 11 503 Rubber Mallet Tool Box DISASSEMBLY Instructions for disassembling the accumulator Release all the hydraulic system pressure in a safe manner eg bleed valve or automatic discharge valve installed in the system Remove the accumulator from the hydraulic system and place it horizontally in a vice or a clamping device Protect the clamping jaws with wood or rubber so as not to damage the accumulator shell 3 Connect a suitable charging amp gauging assem bly to the valve adaptor and release all the nitrogen precharge pressure from the accumulator until the gauge reads zero OQOMLAIrR 1 Remove the protective cap on the gas 2 Remove the valve sealing cap from the valve valve adaptor 5 Remove the valve core if the gas valve body has a core inside 1 piece valve stem design 4 Remove the valve adaptor from the gas valve body 2 piece valve stem design 6 Remove the jamnut and the name plate from the gas valve body While removing the jamnut hold the gas valve body with a wrench so that the bladder will not rotate 9 Push the fluid p
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