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AVK 764 Series, Field Maintenance And Instruction Manual

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American AVK Company
An ISO 9001 registered company

Maintenance Manual Series 764
*Subject to change without notice. (rev. 01/19 A)

AVK SERIES 764 - ECCENTRIC PLUG VALVE
FIELD MAINTENANCE AND 
INSTRUCTION MANUAL 

TABLE OF CONTENTS
EXPLODED ASSEMBLY / PARTS LIST

SAFETY

INTRODUCTION / DESCRIPTION

RECEIVING AND STORAGE

INSTALLATION AND TESTING

 

- INSTALLATION

 

- TESTING

OPERATION AND MAINTENANCE

 

- TOOLS

 

- OPERATION

 

- MAINTENANCE PROCEDURES

  - 

INSPECTION

 

 

- DISASSEMBLY FOR INSPECTION

 

 

- REASSEMBLY AFTER INSPECTION

REPAIR PROCEDURES

TROUBLESHOOTING GUIDE

PARTS AND SERVICE

WARRANTY

AMERIC

AN A

VK C

OMP

ANY

Summary of Contents for 764 Series

Page 1: ... INSTRUCTION MANUAL TABLE OF CONTENTS EXPLODED ASSEMBLY PARTS LIST SAFETY INTRODUCTION DESCRIPTION RECEIVING AND STORAGE INSTALLATION AND TESTING INSTALLATION TESTING OPERATION AND MAINTENANCE TOOLS OPERATION MAINTENANCE PROCEDURES INSPECTION DISASSEMBLY FOR INSPECTION REASSEMBLY AFTER INSPECTION REPAIR PROCEDURES TROUBLESHOOTING GUIDE PARTS AND SERVICE WARRANTY AMERICAN AVK COMPANY ...

Page 2: ...page 1 American AVK Series 764 Eccentric Plug Valve Exploded Parts Breakdown 730 729 726 724 725 721 722 718 722 702 709 703 704 711 714 705 710 723 702 701 707 715 708 706 728 714 ...

Page 3: ...eel 714 Bearing 304 Stainless steel 715 Washer NBR Neoprene 716 Gearbox Bolt Copper Alloy 717 Gearbox Washer NBR Neoprene 718 Stop Plate Zinc Plate 304 316 Stainless steel 719 Stop Plate Screw Copper Alloy 720 Stop Plate Nut NBR 721 Stop Bolt Copper Alloy 722 Stop Washer NBR 723 Stop Nut Copper Alloy 724 Wrench Nut Lock Bolt EPDM encapsulated ductile iron 725 Wrench Nut Lock Washer Copper Alloy 72...

Page 4: ... It is essential that staff undertaking these operations are adequately trained and it is the responsibility of the end user that only trained and competent staff undertake these duties This manual has been designed to assist but it cannot replace quality training in the workplace However AVK s technical staff are always available to answer questions relating to specific problems that may not be c...

Page 5: ... valve parts Failure to carefully follow these recommendations is likely to result in damage to the valve as well as risk of personal injury INSPECTION AFTER UNLOADING AVK eccentric plug valves should be inspected for damage at the time of receipt The initial inspection should verify compliance with specifications direction of opening size and flange details A visual inspection of the seating surf...

Page 6: ...ay be installed vertically however whenever possible horizontal orientation is preferred When eccentric plug valves are mounted in a horizontal line the recommended installation is with the plug rotating 90 upward to open This orientation reduces the chance of solids preventing plug operation Typical Eccentric Plug Valve Installations FLOW FLOW FLOW page 5 Fig 1 Eccentric Plug Valve Installation ...

Page 7: ...the proper flow direction and with adequate clearance for actuating devices The valves are designed o allow flow in both directions however they are normally installed in a standard flow direction with the seat on the downstream of the flow and the flow against the back of the plug 5 Tighten the bolts and nuts in the crossover method shown in Fig 2 to load the pipe and valve evenly and prevent str...

Page 8: ...e foreign material such as weld spatter oil grease and dirt from the valve and pipeline 2 Install the valve as shown in Figure 1 A In horizontal pipelines install valve so plug is horizontal and rotates upward as valve opens B For vertical pipelines install valve with the end marked Seat at top of valve 3 Tighten the flange bolts or studs in a sequence according to Figure 2 4 Ensure the valve and ...

Page 9: ...25 PSI DN 65 100 20 20 DN 150 200 40 40 page 8 LEVER OPERATED VALVES A wrench head and lever Figure 4 are also available for use for direct quarter turn operation Various lever lengths are available for specific pressure conditions as shown in the Table below All lengths are in accordance with EN12570 ...

Page 10: ...manent records APPLICATION HAZARDS 1 AVK eccentric plug valves should not be installed in lines where service pressure will exceed the rated working pressure of the valve 2 The valve should not be used in applications that are exposed to freezing temperatures unless sufficient flow is maintained through the valve or other protection is provided to prevent freezing 3 Pipe fittings and valves instal...

Page 11: ... valve to seat Re open the valve and flush the system again to verify that debris has been dislodged from the seating area Fig 5 Stop Plate Detail F718 MAINTENANCE WARNING Flush the system prior to operating valves to prevent damage to seats and plugs When performing maintenance that requires disassembly on valves ensure that the system pressure is at 0 PSI 1 AVK Eccentric Plug Valves are designed...

Page 12: ...record should be made to indicate that the valve has been repaired and is in working condition Any marking that the valve is inoperable should be removed In addition fire department and other appropriate municipal departments should be informed of satisfactory repair of the valve PACKING ADJUSTMENT 1 This can be carried out with the valve under pressure in the pipeline 2 Tighten the two gland nuts...

Page 13: ... the ISO flange bolts 2 4xthread size req Nm See table 9 Install actuator REPLACE OTHER COMPONENTS FIGURE 7 1 Isolate valve and ensure there is no pressure in pipeline 2 Remove hot melt 1 to expose bonnet bolts 2 3 Remove actuator 4 Disassembly ISO flange 3 gland 8 gland nuts 4 and packing 9 5 Remove bonnet bolts 2 and lift bonnet 10 6 Push plug 15 out of body 17 replace needed components then rea...

Page 14: ...ction Replace stem o rings PROBLEM Nozzle section facing the wrong direction Corrective action Loosen the Nozzle Section hardware and carefully rotate the Nozzle Section to the desired position Tighten the mounting hardware to 60 Ft Lbs PROBLEM Hydrant flow is low Probable Cause Hydrant or supply vale is not fully open Corrective action Verify that the hydrant is fully open The AVK Series 24 hydra...

Page 15: ...his warranty shall be void As to motors gearing or accessory equipment purchased by American AVK Company from others manufacturers and used or incorporated into American AVK Company s products those manufacturers warranties shall apply American AVK Company will honor all reasonable costs to repair or replace any American AVK Company Wet Barrel Fire Hydrant found to be defective American AVK Compan...

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