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AVK 879 Series, Installation, Operation & Maintenance Manual

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AVK 879 Series Installation, Operation & Maintenance Manual Download Page 15

PROBLEM

CAUSE

SOLUTION

THE PILOT VALVE 

DOES NOT CLOSE TIGHT

Spring 

6

 is excessively compressed.

Turn the pilot calibration screw 

2

counter-clockwise.

Shutter seal gasket 

14

 is damaged.

Substitute seal gasket 

14

.

THE COVER OF THE PILOT 

LEAKS

Diaphragm 

11

 is damaged.

Substitute diaphragm 

11

.

ITEM

QTY

DESCRIPTION

MATERIALS

6

1

SPRING

TEMPERED STEEL SiCrV

11

1

DIAPHRAGM

EPDM + NYLON

14

1

SHUTTER

A EPDM

16.2 Pilot: Troubleshooting

16.3 Pilot: Recommended spare parts

ACMO-AVK | IOM Manuals

ACMO-AVK_IOM_879-M100_00-20200520

15

ACMO-AVK CONTROL VALVE SERIES 879

879/BB0X99 - M100 PRESSURE REDUCING VALVE

The designs, materials and specifications shown are subject to change without notice. This is due to the continuous development of our product programme.
Unauthorized use is forbidden.

Summary of Contents for 879 Series

Page 1: ...INSTALLATION OPERATION MAINTENANCE MANUAL ACMO AVK CONTROL VALVE SERIES 879 M100 879 BB0X99 PRESSURE REDUCING VALVE Rev 00 20200520 ACMO AVK_IOM_879 M100_2020 COPYRIGHT AVKGROUP ACMO www acmosrl com ...

Page 2: ... tests once installed 12 Commissioning 13 Maintenance 14 Recommended spare parts 15 Troubleshooting 16 ACV100 pilot 16 1 Pilot Components and dimensions 16 2 Pilot Troubleshooting 16 3 Pilot Recommended spare parts The designs materials and specifications shown are subject to change without notice This is due to the continuous development of our product programme Unauthorized use is forbidden ACMO...

Page 3: ...ny hazardous movement caused by stored energy pressurized air water under pressure must be prevented When a valve needs to be dismantled from a pipeline water may emerge from the pipeline or the valve The pipeline must be emptied completely before the valve is dismantled It is strictly prohibited to disinstall any component when the system is under pressure working or when there is any fluid insid...

Page 4: ...rder upon arrival and report a claim immediately before unloading the goods Lifting the valve improperly may damage it Lift the valves using slings ISO 4878 otherwise if present on one valve using the specific eyebolts Make sure the slings do not interfere with circuit components Don t lift up the valves using the position indicator or the accessories and pipes installed on the valve Please make s...

Page 5: ...though AC MO S r l valves are designed and built to be extremely long lasting at the end of their life cycle they must be removed and replaced Dismantle the valve separate its components to dispose them of and recycle them e g metal parts must be separated from plastic parts etc WARNING Always respect the directives on waste collection disposal and recycling Carefully observe all steps listed in N...

Page 6: ...HEX NUT STAINLESS STEEL A2 EN ISO 3506 1 14 DIAPHRAGM SUPPORT DUCTILE IRON EN GJS 500 7 EN 1563 15 OBTURATOR DUCTILE IRON EN GJS 500 7 EN 1563 16 REGULATING PLUG STAINLESS STEEL AISI304 EN 10088 3 17 SEAT STAINLESS STEEL AISI304 EN 10088 3 18 STEM STAINLESS STEEL AISI304 EN 10088 3 15 16 17 18 13 12 14 2 3 4 1 7 8 10 11 9 6 5 7 Series 879 overview 7 1 Valve components description The designs mater...

Page 7: ...9 405 355 28 12 319 198 156 300 850 835 604 540 795 554 525 445 400 23 12 370 460 410 28 12 370 255 220 350 980 960 710 600 870 604 585 505 460 23 16 429 520 470 28 16 429 456 323 400 1100 1020 780 660 995 710 645 565 515 28 16 480 580 525 31 16 480 542 494 450 1200 1200 929 720 1060 780 705 615 565 28 20 530 640 585 31 20 548 868 641 500 1250 1270 1018 795 1245 929 780 670 620 28 20 582 715 650 3...

Page 8: ...5 m s Minimum necessary differential pressure 0 2 bar Working temperature from 10 C to 80 C 0 1 2 3 4 5 6 7 8 9 10 0 5 10 15 20 25 B A CAVITATION RISK NO CAVITATION DOWNSTREAM PRESSURE bar UPSTREAM PRESSURE bar HEAD LOSS DIAGRAM FLOW RATE m3 h HEAD LOSS bar 0 01 0 1 1 0 1 10 100 1000 10000 DN50 DN65 DN80 DN100 DN150 DN200 DN250 DN300 DN350 DN450 DN400 DN500 DN600 REDUCED BORE FULL BORE DN65 DN80 D...

Page 9: ...e not damages to any joint pipe or tools The hydraulic pressure reducing valve is an automatic control valve specifically designed to maintain outlet pressure constant at a defined value Independently from the pipeline pressure variations or variations in the water demand 8 Principle of operation 9 Installation DN REDUCED BORE 65 80 100 125 150 200 250 300 350 400 450 500 600 Kv m3 h 53 83 119 135...

Page 10: ... 6 PRESSURE GAUGE STAINLESS STEEL 7 3 WAY BALL VALVE NICKEL BRASS 8 2 WAY BALL VALVE NICKEL BRASS 5 7 3 1 8 4 6 2 10 Hydraulic circuit The designs materials and specifications shown are subject to change without notice This is due to the continuous development of our product programme Unauthorized use is forbidden ACMO AVK IOM Manuals ACMO AVK_IOM_879 M100_00 20200520 10 ACMO AVK CONTROL VALVE SER...

Page 11: ...The needle valve 3 has been calibrated in our factory To reduce the opening speed of the hydraulic valve turn needle valve 3 clock wise Vice versa to increase it 3 Turn the calibration screw situated on the pilot valve 5 counter clockwise until the spring loo sens completely Open ball valve 8 the main valve will stay closed if the downstream pressure is higher than the minimum pressure of calibrat...

Page 12: ...ontrol circuit Remove the screws on the valve cover remove the cover and take out the obturator completely Check for any eventual damage of the rubber components such as the lip seals of the piston and the seal gasket to schedule the maintenance intervention Assemble the obturator the valve cover and tighten the bolts properly Put the valve back into service This kind of check allows scheduling th...

Page 13: ...eat The main valve diaphragm leaks Close the ball valve 1 4 8 and remove the plug from the cover If the diaphragm continues leaking it must be substituted because it has been damaged WARNING The valve will open completely THE VALVE DOES NOT REGULATE Swings Slowly calibrate the needle valve 3 until the swings stop Air in the upper part of the valve Loosen the cover connections let the air escape an...

Page 14: ...ESS STEEL A2 EN 10088 3 8 SPRING GUIDE Mn Steel Ni Plated 9 FIXING HOLDER STAINLESS STEEL AISI304 EN 10088 1 10 SCREW STAINLESS STEEL A2 EN 10088 3 11 DIAPHRAGM EPDM NYLON EN 681 1 12 YOKE STAINLESS STEEL AISI304 EN 10088 1 13 BODY STAINLESS STEEL AISI304 EN 10088 1 14 SHUTTER AISI304 EPDM EN 10088 1 EN 681 1 15 O RING NBR EN 681 1 16 PLUG STAINLESS STEEL AISI304 EN 10088 1 16 ACV100 pilot 16 1 Pi...

Page 15: ...TEM QTY DESCRIPTION MATERIALS 6 1 SPRING TEMPERED STEEL SiCrV 11 1 DIAPHRAGM EPDM NYLON 14 1 SHUTTER AISI304 EPDM 16 2 Pilot Troubleshooting 16 3 Pilot Recommended spare parts ACMO AVK IOM Manuals ACMO AVK_IOM_879 M100_00 20200520 15 ACMO AVK CONTROL VALVE SERIES 879 879 BB0X99 M100 PRESSURE REDUCING VALVE The designs materials and specifications shown are subject to change without notice This is ...

Page 16: ...oma Italy Via Franco Michelini Tocci 93 tel 39066628238 fax 39066628335 inforoma acmospa com Headquarters 31056 Roncade TV Italy Via T da Modena 28 Z I tel 390422840220 r a fax 390422840923 info acmospa com www acmosrl com ...

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