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6. After removing the Stem Nut, the remainder of the Disc & Diaphragm Assembly should disassemble easily. Polish stem guide

surfaces with fine emery cloth to remove any mineral deposits and inspect for excessive wear. Remove any mineral build-up from

other components with wire brush or by using a Mineral Dissolving Solution. Inspect parts for wear and replace if necessary.

7. Inspect valve seat. If seat is not damaged, removal is not necessary. If it is damaged please contact factory for instructions.

8 IOM-A-ACV-980-16-19_680-16-19 2115

EDP# 1917102

IOM-A-ACV-980-16-19_680-16-19 2115

EDP# 1917102

Содержание 680GD-16-19

Страница 1: ...l Valve 3 Maintenance Schedule 6 Trouble Shooting Guide 6 Valve Disassembly Instructions 8 ACV Schematic 11 Local building or plumbing codes may require modifica tions to the information provided You...

Страница 2: ...to minimize the surges asso ciated with the starting and stopping of pumps The valve slowly opens and closes as required to control pumping related surges The pump starts and stops against a closed v...

Страница 3: ...to confirm rate of movement and remove excess air trapped within the cover chambers To increase the rate of opening closing turn the adjustment screws on the speed controls OUT counterclockwise See Fi...

Страница 4: ...nue to operate as the main valve closes To close main valve de energize the solenoid checking that the main valve closes STEP 7 Closing Speed Flow Adjustment While free flow goes into the upper chambe...

Страница 5: ...cification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace diaphragm or...

Страница 6: ...Main Valve will not close Closed isolation valves in pilot system Check isolation valves ensure open Diaphragm is damaged Conduct diaphragm seal test repair and replace if necessary Main valve stem a...

Страница 7: ...e cover nuts and washers 3 Remove the cover If cover is not free to be removed loosen it by tapping upward along its outside edge with a dull cold chisel pic tured above a Large valves may require the...

Страница 8: ...its and inspect for excessive wear Remove any mineral build up from other components with wire brush or by using a Mineral Dissolving Solution Inspect parts for wear and replace if necessary 7 Inspect...

Страница 9: ...r smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrity of the Seat Seal by following the Seat Seal Test procedure in previous section 12 Return v...

Страница 10: ...r 3 and Smaller ASTM A276 302 Stainless Steel 13A Bearing Retaining Ring 4 and Larger ASTM A276 302 Stainless Steel 14 Inner Bearing ASTM A276 304 Stainless Steel 15 O ring Buna N Nitrile 16 O ring Bu...

Страница 11: ...IOM A ACV 980 16 19_680 16 19 2115 EDP 1917102 2021 Watts 11 NOTES...

Страница 12: ...2 2021 Watts USA Backflow T 978 689 6066 F 978 975 8350 AmesFireWater com USA Control Valves T 713 943 0688 F 713 944 9445 AmesFireWater com Canada T 888 208 8927 F 905 481 2316 AmesFireWater ca Latin...