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1. Select a valve material that is compatible with the media For chemical resistance information refer to CHEMICAL RESISTANCE ON ASAHI AV VALVE Some chemicals may damage incompatible valve materials Please contact us when use for the fluid containing the crystalline substance It would make the valve unable to seal Keep the valve out of direct sunlight water and dust Use cover to shield the valve The valve will not operate properly Perform periodic maintenance Leakage may develop due to temperature changes or periods of prolonged storage rest or operation Diaphragm cannot exchange When you exchange please contact us The recommended exchange period of diaphragm is the shorter one of following 1 One year after delivery 2 500 000 of times of opening and closing In case it is used by frequency of specification within the limits and is used for pure water Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 2 ASAHI AV VALVES Installation Operation and Maintenance Manual 3 General instructions for transportation unpacking and storage A S When suspending and supporting a valve take care and do not stand under a suspended valve Warning A S This valve is not designed to handle impacts of any kind Avoid throwing or dropping the Caution valve Avoid scratching the valve with any sharp object Do not over stack cardboard shipping boxes Excessively stacked packages may collaps2. am form M o GP 6 98 wie 0028 s w ow MS ow a ia Nee 039 oN ian Map hier Base gt Unit mm inch Unit mm inch 15 25mm 1 2 thru 1 5 4 92 O 4 72 i 3 07 1 D e o NS pa one ls SS a ee Ses N J b PERIS 2 62 p 0 35 He VRENA IRE NESA RAET ORE IEE II ENAT ANOA EERE SIEA RESONANS a 4 33 a Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 14 ASAHI AV VALVES Installation Operation and Maintenance Manual 14 Air piping procedure A S Do not remove a dust proof cap provided to piping port before piping work starts Caution Avoid excessive tightening The threaded area of a pipe can be damaged Check the connection locations air pipe sizes and screw types with the approved drawings and other documents for the product Then lay the air piping The operating fluid must be clean air filtered through a pertinent air filter If the actuator is used in an environment below 5 C temperature its operating fluid must be free from the water and moisture contained in it because of possible problems due to the freeze Steel pipes must always be of the plated Before installing an actuator in pipeline flash the inside of pipeline completely Do not apply a sealant excessively lest it fall off in the pipel
3. hours after joining the pipes with an adhesive cath gt Necessary items PENON OONN ee ee See SE ee ee Se EENEN EN EOE NEEE Adhesive for hard vinyl chloride pipes Strap Wrench Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 9 ASAHI AV VALVES Installation Operation and Maintenance Manual Procedure 1 Loosen the union nut 2 with a strap wrench 2 Remove the union nut 2 and end connector 3 3 Lead the union nut through the pipe 4 Make sure the hub part of the end connector 3 is clean with waste cloth 5 Apply adhesive evenly to the hub part of the end connector 3 and the pipe spigot Do not apply more adhesive than necessary The valve can be damaged due to solvent cracking Adhesive Quantity guideline Nom Size 15mm 20mm 25mm 40mm 50mm i 1 2 3 4 ad 1 1 2 2 Quantity g 1 0 1 3 2 0 3 5 4 8 6 After applying adhesive insert the pipe quickly to the end connector 3 and leave it alone for at least 60 seconds 7 Wipe away overflowing adhesive 8 Make sure that O ring A 9 is mounted 9 Set the end connector 3 and union nut 2 directly on the body without allowing the O ring A 9 come off 10 Make sure that flow direction is correct 11 Tighten union nut 2 on each valve until hand tight 12 Using a strap wrench tighten union nuts 2 uniformly on each side approx 90 180 turns 1 4 to 1 2 tur
4. the rubber sheet on the pipe and H secure pipe with U type clamp tand O Using U type Clamp Only Flanged End Example Spread the rubber sheet on the flange aie SI Ty Ind Clamy and secure flange with U type clamp a 1 A y 4 ind Example Actuator Perpendicular Plumber bber Sheel S Bey 7 Fix the installation jig under the valve l l op 7 is ld ac iil b and stand with bolts Refer to page 14 ee SE Spread the rubber sheet between the actuator and stand mt kv 3 ind Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 13 Installation Operation and Maintenance Manual ASAHI AV VALVES Installation Operation and Maintenance Manual 13 Dimension of mounting thread and base A S When screwing in a Metal Insert Ensat install it vertically Refer to the User s Caution Manual for Metal Insert Ensat by the Maker Avoid excessive tightening The valve can be damaged Make sure that the length of screw bolt The valve may be damaged Mounting Thread gt Mounting Thread Dimension Unit mm inch Nominal s Thread Thread size Size Depth
5. ASAHI AV VALVES Diaphragm Valve Type 16 Pneumatic Actuated Type AD 15 50mm 1 2 2 User s Manual 1 2 3 4 5 6 7 8 9 10 1 12 13 14 15 16 17 18 19 Installation Operation and Maintenance Manual Serial No H A055 E 6 Contents Be sure to read the following warranty clauses of our product General operating instructions Sata eae tate ect eet General instructions for transportation unpacking and storages Name of parts mm Working pressure vs temperature PORE EANAN ONNES AT Working pressure VS back pressure Se se eee Working pressure vs operation pressure Specification Of Products err rere errr Specification of ACCU AOL nnn Installation procedure sesers Support setting procedure P E EE Dimension of mounting thread and bases Air piping procedure Adjustment procedure for options pE E AAE nian dasa Troubleshooting eeen Handling of residual and waste materials Page No 13 14 16 17 17 18 19 19 20 ASAHI AV VALVES Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 ASAHI AV VALVES Installation Operation and Maintenance Manual This user s guide contains very important information for the proper installation maintenance and safe use of an ASAHI AV Product Please store this manual in an easily accessible location lt
6. Warning amp Caution Signs gt A This symbol reminds the user to take caution due to the potential for serious injury or Warning death This symbol reminds the user to take caution due to the potential for damage to the valve Caution if used in such a manner lt Prohibited amp Mandatory Action Signs gt S Prohibited When operating the valve this symbol indicates an action that should not be taken ey Mandatory action When operating the valve this symbol indicates mandatory actions that must be adhered to 1 Be sure to read the following warranty clauses of our product Always observe the specifications of and the precautions and instructions on using our product We always strive to improve product quality and reliability but cannot guarantee perfection Therefore should you intend to use this product with any equipment or machinery that may pose the risk of serious or even fatal injury or property damage ensure an appropriate safety design or take other measures with sufficient consideration given to possible problems We shall assume no responsibility for any inconvenience stemming from any action on your part without our written consent in the form of specifications or other documented approval The related technical documents operation manuals and other documentation prescribe precautions on selecting constructing installing operating maintaining and servicing our products For details
7. anner Refer to Fig 1 Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 A ae The parallelism and axial misalignment of the flange surface should be under the values 11 ASAHI AV VALVES A in a diagonal manner Installation Operation and Maintenance Manual Tighten the bolts and nuts gradually with a torque wrench to the specified torque level i Caution Avoid excessive tightening The valve can be damaged Recommended Torque Value Unit N m kgf cm Ib inch Giese 15 20mm 25 40mm 50 mm poe 1 2 3 4 11 1 2 2 PTFE PVDF coated 17 5 179 155 20 0 204 177 22 5 230 230 Rubber 8 0 82 71 20 0 204 177 22 5 230 230 When union nut is removed from body please equip by the following methods D 2 3 4 5 Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 Caution Make sure that the O ring A 11 is mounted Set the end connector 3 and union nut 2 directly on the body without allowing the O ning A 9 to come off Make sure that flow direction is correct Tighten union nut 2 on each valve until hand tight Using a strap wrench tighten union nuts 2 uniformly on each side approx 90 180 tums 1 4 to 1 2 tums Avoid excessive tightening The valve can be damaged A gd Tighten union nut on each valve Avoid excessive tightening The valve can be dama
8. consult with our nearest distributor or agent Our product warranty extends for one and a half years after the product is shipped from our factory or one year after the product is installed whichever comes first Any product abnormality that identify its cause Should our product be deemed defective we shall assume the responsibility to repair or replace it free of charge Any repair or replacement needed after the warranty period ends shall be charged to the customer The warranty does not cover the following cases 1 Using our product under any condition not covered by our defined scope of warranty 2 Failure to observe our defined precautions or instructions regarding the construction installation handling maintenance or servicing of our product 3 Any inconvenience caused by any product other than ours 4 Remodeling or otherwise modifying our product by anyone other than us 5 Using any part of our product for anything other than the intended use of the product I I I I I I I I I I I I I I I i occurs during the warranty period or which is reported to us will be investigated immediately to i i I I I I I I I I I I I i 6 Any abnormality that occurs due to a natural disaster accident or other incident not stemming I I I from something inside our product Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 1 ASAHI AV VALVES Installation Operation and Maintenance Man
9. d Existence of scratches cracks deformation and discoloring Tightening condition of bolt A 25 If loose the bolt tighten it diagonally with the torque of 2 0 N m Existence of abnormality in opening and closing operating sounds Existence of air leakage Actuator It is unnecessary to supply oil to this actuator Valve Body 18 Troubleshooting Problem Cause Existence of scratches cracks deformation and discoloring Existence of leakage from the valve to the outside Existence of leakage when the valve is shut Tightening condition of bolt A 25 Loose or not Treatment The valve does not operate by air operations Air is not supplied to actuator Supply air to actuator The speed controller s handle is fully turned in a clockwise direction handle in a Refer to Turn speed controller s counterclockwise direction pages 18 The operation pressure is low Check the operating pressure Fluid leaks from the valve even when the valve is closed fully The diaphragm is worn The diaphragm or the body is scratched Foreign matter is in the valve Replace the valve with a new one The operating pressure is low Double acting Check the operating pressure Fluid leaks to outside from the valve The bolt between the body and actuator is loose The diaphragm or the body is scratched There is for
10. e These chemicals may cause damage to the valve Store products in their corrugated cardboard boxes Avoid exposing products to direct sunlight and store them indoors at room temperature Also avoid storing products in areas with excessive temperatures Corrugated cardboard packages become weaker as they 1 1 1 1 L 1 i Avoid contact with any coal tar creosote insecticides vermicides or paint i i 1 1 i 1 become wet with water or other liquid Take care in storage and handling i Sele ie SiS SS eee ee Se ee ee ee ey After unpacking the products check that they are defect free and meet the specifications Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 3 ASAHI AV VALVES 4 Name of parts Nominal Size 15 50mm 1 2 2 Installation Operation and Maintenance Manual Options A Travel Stop mom i B Travel Stop and Indicator o C Speed Controller 15 50mm 1 2 2 nhen 15 25mm 1 2 1 36 15 50mm 1 2 2 1 Body 5 Diaphragm 21 Stop Ring 2 Union Nut 8 Cylinder Body 31 Indicator A 3b End Connector Socket End 9 Gauge Cover A 33 Travel Stop Handle 3c End Connector Threaded End 10 Gage Cover 35 Travel Stop Lock Nut A 3d End Connector F
11. eign matter between the diaphragm and the body The union nut is loosened Tighten up the bolt to the specified torque Replace the valve with a new one Tighten the union nut The O ring A 11 is scratched or worn Replace the O ring A 11 with a new one The actuator operates but the valve does not open or close The diaphragm or the joint of diaphragm is broken Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 Replace the valve with a new one 19 ASAHI AV VALVES Installation Operation and Maintenance Manual 19 Handling of residual and waste materials A Make sure to consult a waste treatment dealer for recommendations on the proper disposal Se of plastic valves Poisonous gas is generated when the valve is burned improperly Warning Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 Automatic Valve ASAHI AV VALVES Distributor Asahi Organic Chemicals Industry s homepage http www asahi yukizai co jp en Information in this manual is subject to change without notice 2012 9 Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 20
12. ged Make sure that flow direction is correct The valve can be damaged Flow Direction X Flow Direction upstream is A downstream is B UU UY Flow Direction until tight by hand after that tighten union nuts uniformly on each side approx 90 180 turns 1 4 to 1 2 turns by using a strap wrench At this point make sure that there is no piping stress If piping stress is applied a cap nut cannot be closed easily and the leak of fluid will become easy to occur 12 ASAHI AV VALVES 12 Support setting procedure Do not subject the valve pump vibrations The valve may be damaged Caution When installing a pipe support by means of a U band or something similar take care not to fasten it too much Excessive tension may damage it g Set the valve support The valve may be damaged because the actuator is heavy scene Necessary items Sinletaveveie dese Seal E erate ans dene tele tee eee ieee enh eke re velo bere Si Bee Sees ere ee eee te daily Spanner Wrench U type Clamp with Bolt Rubber Sheet Level Plumber Examol O Using mounting Thread or Base 2 poeemi E Fix the installation jig under the valve heet Type Band Clam and stand with bolts Refer to page 14 F Make sure that the length of screw bolt FE paj The valve may be damaged H P 4 Spread
13. hragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 16 ASAHI AV VALVES Installation Operation and Maintenance Manual 16 Adjustment procedure for options lt Travel Stop gt Combination number of options 3 amp 4 Travel SOR ae CE Procedure 1 Completely close valve by controlling the volume of air 2 Loosen the travel stop lock nut A 35 3 Screw travel stop handle 33 into required flow rate 4 While holding the travel stop handle 33 by hand tighten a 3 eer f Fis COL CO the travel stop lock nut A 35 D P Make sure that the travel stop handle 33 is tightened firmly Q P 55 5 Open valve by controlling the volume of air and check if the flow rate become required value If not repeat steps from 1 to 4 Travel Stop Stem Gage Cover lt Travel Stop gt JZ ravel Stop Lock Nut B Combination number of options 5 6 Procedure 1 Completely close valve by controlling the volume of air 2 Remove the gage cover 10 3 Loosen the travel stop lock nut B 36 4 Screw travel stop stem 34 into required flow rate 5 Holding travel stop stem 34 with hand and tightened travel stop lock nut B 36 Make sure that the travel stop stem 34 is fixed firmly 6 Open valve by air operation and check if the flow rate become required value If not Repeat steps 1 to 4 7 Attach the gage cover 10 Diaphragm Valve Ty
14. ine when an actuator is piped Threaded area of a pipe must be free from the sharp edges and burr i The fitting for air supply piping must be plastic Rc 1 8 and tightened to the proper torque of 0 4 0 6 Nm Use of a metal fitting may damage air supply port p Necessary items E P TEETE E E OSEE EE E E E ee EIEE E EE E EEE EEE EE EE E E TAE Plastic fitting for air piping Rc1 8 i Sealing tape Procedure 1 Wind a seal tape onto the male screw of the joint with a blank about 3mm about 2 threads left at the end 2 Screw the joint in the piping female screw of the actuator by hand fully Avoid excessive tightening The valve can be damaged Do not use tools spanner etc The valve can be damaged Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 15 ASAHI AV VALVES Installation Operation and Maintenance Manual 15 Operating procedure A amp Check that the supply pressure of the pressure reducing valve with a filter is Air to Open 0 4 0 5MPa 4 1 5 1kgf cm2 58 72 5PSI Double Acting 0 3 0 4MPa 3 1 4 1kgf cm2 43 5 58PSI AV valve may not function Caution Procedure 1 Supply air to the air supply opening 2 Check that the air supplying side and the stopper 43 position are matching 3 Stop supplying air Indicator A Shut Open Indicator B P Dug d Diap
15. justing the opening and closing speed of a valve aca Action Nom Size Size Double Acting 15 50 mm AirtoOpen 1 2 2 O D 6mm tube lt Flow property of Speed Controller gt Controled Flow Free Flow Flow rate L min ANR Flow rate L min ANR O 0 1 0 2 0 3 0 4 0 5 0 60 7 Rotation Number Pressure MPa Please refer to section 14 Adjustment procedure for options for details lt Combination of Options gt Nominal Size 15 25mm 1 2 1 Combination No 1 2 3 4 5 6 Indicator O O O O Speed Controller O O O Travel Stop O O O O Standard equipment Nominal Size 40 50mm 1 1 2 2 Combination Patterns 1 2 3 4 Indicator O O Speed Controller O O Travel Stop O O Standard equipment Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 8 ASAHI AV VALVES Installation Operation and Maintenance Manual 11 Installation procedure A S When suspending and supporting a valve take care and do not stand under a suspended valve Warning Be sure to conduct a safety check on all hand and power tools to be used before beginning work Wear protective gloves and safety goggles as fluid remain in the valve even if the pipeline is empty You may be injured A S When installing a pipe support by means of a U band or so
16. langed End 11 Oring A 36 Travel Stop Lock Nut B 4 Base 12 Oring B 38 Speed Controller Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 Installation Operation and Maintenance Manual ASAHI AV VALVES 5 Working pressure vs temperature dd Bua Note 1 0MPa 10 2 Kgf cm 145 PSI 6 Working pressure vs back pressure Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 ASAHI AV VALVES Installation Operation and Maintenance Manual 7 Working pressure vs operation pressure CCAir to Open Working Pressure and Operation Pressure Double Acting Working Pressure and Operation Pressure Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 ASAHI AV VALVES 8 Specification of products Installation Operation and Maintenance Manual Nominal Size Items 15mm 20mm 25mm 40mm 50mm 1 2 3 4 a d 1 2 2 Action Air to Open Double Acting Fluid Pure water Chemical Fluid Temperature Working Pressure 0 50 C 30 122 F Range Valve Seat Leakage Back Pressure Range 0 0 5MPa 5 1kgf cm 72 5PS 0 0 4MPa 4 lkgf cm 58PSI Oc
17. m min Hydraulic 0 0 2MPa 2 Ikgf cm 29PST 7 Ambient Temperature 0 50 C 30 122 F Frequency Of Opening Within 20 times min Within 15 times min and Closing Orifice Diameter 16mm 0 63 22mm 0 87 22mm 0 87 40mm 1 57 50mm 1 97 Cv Value 4 8 8 9 5 26 44 Operating Pressure Air to Open 0 4 0 5MPa 4 1 5 Ikgf cm 58 72 5PS Double Acting 0 3 0 4MPa 3 1 4 kgf cm 43 5 58PSI Rc1 8 Any direction 1 Refer to 4 Comparison between working temperature and pressure for details Air Supply Port Size Installation Direction 2 Refer to 5 Comparison between working pressure and back pressure for details 9 Specifications of actuator Nominal size 15mm 20mm 25mm 40mm 50mm A Z GAA a d 1 2 neratins Pressure Double Acting 0 3 0 4 MPa 3 1 4 1 kgf cm 43 5 58 PST iii Air to Open 0 4 0 5 MPa 4 1 5 1 kgf cm 58 72 5 PSI Air Consumption Double Acting 0 14 0 32 0 32 1 24 2 19 L Times ANR f 0 4MPa Air to Open 0 12 0 26 0 26 1 02 1 78 Air Supply Port Double Acting Size Air to Open Rede Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 ASAHI AV VALVES Installation Operation and Maintenance Manual 10 Specifications of options Travel Stop It is used for adjusting flow rate Flow can be adjusted by travel stop Speed Controller JIS Si It is used for ad
18. mething similar take care not to Caution over tighten Excessive force may damage the pipe When installing disassembling or reassembling the piping fix the End Connector Before a water test be sure that the Union Nut is tightly fastened Fasten the Union Nut while avoiding the parallelism and axial misalignment of the flange surface When connecting an ASAHI AV Valve to metal piping take care not to let the pipe stress on the ASAHI AV Valve Take care not to over tighten the Union Nut The valve can be damaged Do not use the pipe wrench The valve can be damaged Ja R p A p a a a E S a a iit a a E p N rt R S E a im op hv A S e a a a E g R a R A R a a A S When using an adhesive ventilate the space sufficiently prohibit the use of a fire in the Warning vicinity and do not inhale adhesive vapors directly If an adhesive gets into contact with your skin wash it off immediately If you feel sick or find any anomaly receive a physician s diagnosis and take appropriate measures promptly A Take care in doing work at low temperatures Solvent vapors are hard to evaporate Caution After assembling the piping system open both ends of the piping and use a fan of the Low Voltage Type or something similar to ventilate the space thus removing the solvent vapors and are likely to remain Solvent cracks may occur damaging the equipment Use the appropriate Asahi AV cement Conduct a water test at least 24
19. n nut 2 on each valve until hand tight 10 Using a strap wrench tighten union nuts 2 uniformly on each side approx 90 180 turns 1 4 to 1 2 turns Avoid excessive tightening The valve can be damaged Installation Operation and Maintenance Manual A amp Use flat faced flanges for connection to AV Valves Caution Ensure that the mating flanges are of the same standards specified torques When a non AV gasket is used a different tightening torque instruction should be followed i Be sure to use sealing gaskets AV Gasket bolts nuts and washers and tighten them to oe Necessary Iems ea a ee eee E A E A i AV gasket Procedure Torque wrench Spanner wrench Bolt Nut Washer For many flanges specification 1 Make sure that flow direction is correct 2 Set the AV gasket between the flanges 3 Insert washers and bolts from the pipe side insert washers and nuts from the valve side then temporarily tighten by hand Caution Unit mm inch shown in the following table to prevent damage to the valve A failure to observe them can cause destruction due to stress application to the pipe 1 1 2 2 A Axial Parallelism Nominal size Ar misalignment a b 15mm 25mm 1 2 1 1 0 0 04 0 5 0 02 a ean 1 0 0 04 0 8 0 03 3 Tighten the bolts and nuts gradually with a torque wrench to the specified torque level in a diagonal m
20. ns Avoid excessive tightening The valve can be damaged type A SO Avoid excessive tightening The valve can be damaged Caution Make sure that the threaded connections are plastic x plastic Wrap the threaded joints on our plastic piping with sealing tape Using a liquid sealing Metallic thread can cause damage agent or liquid gasket may cause stress cracks Environmental Stress Cracking Our product warranty shall not apply in case of said use even when said use is unavoidable to eves Necessary items ee Fae ee Peep eg ee tte ee eee atte Sealing tape Strap wrench Spanner wrench Procedure 1 Wind a sealing tape around the external thread of joint leaving the end about 3mm free 2 Loosen the union nut 2 with a strap wrench Pod 3 Remove the union nut 2 and the end connector 3 Sealing Tape lt 4 Tighten the external thread of the joint and the end connector 3 i hard by hand 5 Using a spanner wrench screw in the end connector 3 by turning 180 360 carefully without damaging it Avoid excessive tightening The valve can be damaged 6 Make sure that the O ring A 11 is mounted 7 Set the end connector 3 and union nut 2 directly on the body without allowing the O ring A 11 to come off Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 10 ASAHI AV VALVES 8 Make sure that flow direction is correct 9 Tighten unio
21. pe16 Pneumatic Actuated Type AD 15 50mm 1 2 2 17 ASAHI AV VALVES Speed Controller gt Installation Operation and Maintenance Manual Procedure Actuator Opening Speed Closing Speed Air to Open Not adjustable Adjustable Double Acting Adjustable Adjustable 1 Loosen the lock nut by ccew turning 2 2 Turn cw the handle fully 3 3 Supply the air to speed controller 4 Turn cew the handle little by little to adjust the opening closing speed required 4 5 When the adjustment is finished tighten the handle lock nuts 5 RO 1 4 ZoD T 2 3 Handle 5 Diaphragm Valve Type16 Pneumatic Actuated Type AD 15 50mm 1 2 2 18 ASAHI AV VALVES Installation Operation and Maintenance Manual 17 Inspection items Perform periodic maintenance Leakage may develop due to temperature changes or over Caution periods of prolonged storage rest or operation Periodically inspect and maintain the AV valve in accordance with the plant schedule Minimum one maintenance per year is recommended Portion to be Inspection Item inspecte
22. ual 2 General operating instructions Do not disassemble or modify the actuator Warning If disassembled under tension internal parts may jump out and this is very dangerous ee Using a positive pressure gas with our plastic piping may pose a dangerous condition due to the repellent force particular to compressible fluids even when the gas is under similar pressures used for liquids Therefore be sure to take the necessary safety precautions such as covering the piping with protective material For inquiries please contact us For conducting a leak test on newly installed piping be sure to check for leaks under water pressure If absolutely necessary to use a gas in testing please consult your nearest service station beforehand A S Do not step on or apply excessive weight on valve It can be damaged Caution Do not use AV valves in a place where they may become submerged in water Submergence will make AV valve fail Do not use the valve in conditions where the fluid may have crystallized The valve will not operate properly Do not disassemble the actuator Injury may occur Do not use the valve in vacuum service It can be damaged Keep the valve away from excessive heat or fire It can be damaged or destroyed Always operate the valve within the pressure vs temperature range The valve can be damaged or deformed by operating beyond the allowable range Allow sufficient space for maintenance and inspection
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