Swing Check Valve
Contents
1. gt Loosen the bonnet 2 and remove it from the body OD lt In case of 25 200mm 8 gt Loosen the bolts and nuts 9 and remove the bonnet 2 4 Loosen the plug 4 and remove it Thrust the bolt A to the threaded hole of shaft G and pull out the shaft from the body Bolt size Nom Size 20 40mm 50mm 65 80mm 100 200mm 3 4 1 1 2 2 2 1 2 3 47 8 Torque valve M4 M5 M6 M8 5 Check the worn of all parts If the part is worn replace it lt Assembly gt lt Nominal size 15mm 20mm 1 2 AE 1 The produce of assembly is the almost reverse of its disassembly 2 Only seat can t be replaced When the seat has necessity to be replaced replace the assembly part of seat 3 After completed the assembly make sure that there is no leakage under the water pressure test lt Nominal size 25mm 1 gt 1 The produce of assembly is the almost reverse of its disassembly 2 Only seat can t be replaced When the seat has necessity to be replaced replace the assembly part of seat 3 When the bonnet 2 is replaced make sure that the arm stopper direction of the bonnet 4 Tighten the bolt nut 9 diagonally and equally torque to fix the body Q and bonnet Unit N m kgf cm Ib inch Torque Torque hee PIFE Rubber NS PIFE Rubber 100 60 200 150 102 61 EE 204 153 89 53 177 133 130 8 0 25 0 200 here 132. until needed for installation Avoid contact with any coal tar creosote insecticides vermicides or paint The force of swelling may damage the valve O The valve is not designed to handle any kind of impact Avoid throwing or dropping the valve O Avoid scratching the valve with any sharp object 3 Name of parts Gasket type 15 20mm 1 2 3 4 DESCRIPTION DESCRIPTION Disc Seat Seat holder O ring A Bolt B Gasket A Nut B Gasket B Gasket 25 200mm 1 8 DESCRIPTION DESCRIPTION Seat holder DESCRIPTION Seat Bolt A O ring A Arm Gasket A Washer Gasket B Nut A Bolt Nut O ring type 15 20mm 1 2 3 4 DESCRIPTION Disc DESCRIPTION Seat Seat holder O ring A Bolt B Gasket B Nut B O ring B Gasket 25 200mm 1 8 DESCRIPTION DESCRIPTION Seat holder DESCRIPTION Pin Bolt A Seat Arm Gasket B Washer O ring B Nut A Bolt Nut 4 Comparison between operating temperature and pressure Gasket type inal
3. 2 82 ps 225 204 115 71 221 177 130 8 0 25 0 200 2 132 82 Es 225 204 115 71 221 177 150 100 30 0 250 ie 153 102 Fi 306 225 133 89 266 221 150 100 30 0 250 er 153 102 eae 306 225 133 89 266 221 5 After completed the assembly make sure that there is no leakage under the water pressure test 7 Inspection items Inspect the follow items Check for any flaw crack or deformation on the outside Check whether fluid leaks to the outside Check whether tightness of bolt nut 8 Troubleshooting and action Problem Cause Action The back pressure is low Check for the back pressure Tie Bag a lame past De dy Seat is wom Replacement closed position PONA pats nave dpe at ate Clear the solid particles from the valve valve O ring is wom Replacement Fluid leaks from the valve Packing is worn Replacement Looseness of bolts nut Retighten 9 Handling of residual and waste materials Remark In discarding remaining or waste materials be sure to ask a waste service company 10 Inquires Head Office No 2 5955 Nakanose Cho Nobeoka City Miyazaki Pref Japan Tel 81 982 35 0880 Fax 81 982 35 9350 Tokyo Office Furukawachiyoda Bldg No 15 9 Uchikanda 2 Chome Chiyoda Ku Tokyo Japan Tel 81 3 3254 8177 Fax 81 3 3254 3474 Singapore Branch Office 16 Raffles Quay 40 03 Hong
4. Leong Building Singapore 048581 Tel 65 220 4022 Fax 65 324 6151 Europe Representative Office Am Wehrhahn 33 40211 Duesseldorf Germany Tel 49 6172 9175 0 Fax 49 6172 9175 25 ASAHI AMERICA Inc 35 Green Street Malden Massachusetts U S A 02148 Tel 1 781 321 5409 Fax 1 781 321 4421 Swing check valve ASAHI ORGANIC CHEMICALS INDUSTRY CO LTD Information in this manual is subject to change without notice 2000 12
5. Swing Check Valve Users Manual D 2 3 4 6 7 8 9 10 ASAHI AV Valves Serial No H VOI3E 1 Contents General operating instructions EE 1 General instructions for transportation unpacking and storage mm 1 Name of parts NR RER 2 Comparison between working temperature and pressure rr 6 Installation procedure v 8 Disassembly and assembly produce for parts replacement sms 9 Inspectionitems s 10 Troubleshooting KE 1 1 Handling of residual and Waste materials s 11 Inquires Ed 1 1 ASAHI ORGANIC CHEMICALS INDUSTRY CO LTD 1 General operating instruction O Operate the valve within the range of the published working temperature and pressure The valve can be damaged by operation beyond the maximum allowable range of temperature vs pressure O To select a valve in appropriate materials refer to CHEMICAL RESISTANCE ON ASAHI AV VALVE Some chemicals give heavy damage to valve materials O The valve is not designed to carry any external load of any kind Never stand on or place anything heavy on the valve at anytime O The valve should be installed such that there is sufficient space for periodic inspection amp maintenance O Do not store or install the valve near any heat source or hot surface O The valve should be operated by hand 2 General instructions for transportation unpacking and strange O Leave the valve in its original packaging
6. m can cause destruction due to stress application to the pipe Unit mm inch Axial Parallelism misalignment ab Axial misalignment Paralldism 20 25mm 10 28 G I 0 04 i 40 50mm 1 0 11 22 0 04 65 150mm 1 5 QILE 0 06 200mm 2 0 8 0 08 Nom Size 3 Using a torque wrench tighten the bolts and nuts gradually to the specified torque in a diagonal manner Refer to fig 1 Specified torque value Unit N m kgf cm Ib inch Nom Size 20mm 25 40mm 50mm 80 100mm 125 150mm 200mm GA q 1 12 2 6 4 57 6 8 Torque 17 5 200 22 5 30 0 40 0 55 0 oan 179 204 204 306 408 561 155 177 199 265 355 488 Remark Avoid excessive tightening The valve can be damaged 8 6 Disassembly and assembly procedure for parts replacement HE Necess ary items EEE Torque wrench Spanner wrench Protective gloves Safety goggles Bolt Nut Washer For many flanges specification AV gasket When anon AV gasket is used a different tightening torque specification should be followed Caution Wear protective gloves and safety goggles as some fluid remains in the valve You may be injured lt Disassembly gt 1 Drain fluid completely from the pipe line 2 Loosen the connecting bolts and nuts and remove the valve from pipeline 3 lt n case of 20mm 3 4
7. size 125MM 57 Caution Do not operate valve beyond the range of working temperature and pressure The valve can be damaged Nomina Caution Do not operate valve beyond the range of working temperature and pressure The valve can be damaged 5 Installation procedure en Necessary items EEE Torque wrench Spanner wrench AV gasket Bolt Nut Washer For many flanges specification When a non AV gasket is used a different tightening torque specification should be followed 1 Set the AV gasket between the flanges 2 Insert washers and bolts from the pipe side insert washers and nuts from the valve side and temporarily tighten them by hand Remark The parallelism and axial misalignment of the flange surface should be below the values in the following A failure to observe the
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