Victaulic 5-Year Rebuild Kit Instructions Manual Download Page 11

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4. Clean the back of the valve body to remove any debris that may

interfere with proper diaphragm seating.

4a. Clean the inside of the diaphragm cover to remove any foreign

material.

CAUTION

• Use caution when installing a new diaphragm into the valve

body.

Failure to follow this instruction could cause damage to the
diaphragm, resulting in improper valve operation and valve
leakage.

5. Install the new diaphragm (provided with the kit) by aligning the

holes in the diaphragm with the holes in the valve body. Be careful
not to damage the diaphragm during installation.

6. Align the holes of the diaphragm cover with the holes in the

diaphragm/valve body. Tighten all cap screws into the diaphragm
cover/valve body.

Re-attach the trim at the unions that were loosened in step 1.
Refer to the applicable trim drawing for details.

MAKE SURE

ALL UNIONS THAT WERE LOOSENED TO PERMIT ACCESS
TO THE DIAPHRAGM COVER ARE RE-TIGHTENED BEFORE
ATTEMPTING TO PLACE THE SYSTEM BACK IN SERVICE.

8. Place the system back in service by following the “Placing

the System in Service” section in the applicable installation,
maintenance, and testing manual for the valve.

5-Year Rebuild Kit Instructions for

FireLock NXT

™

Valves

SERIES 768 AND 769

I-NXT.RBKIT

REBUILD KIT INSTRUCTIONS

I-NXT.RBKIT

For complete contact information, visit www.victaulic.com

I-NXT.RBKIT 6071 REV A UPDATED 03/2010 ZNXT5RBKIT

Summary of Contents for 5-Year Rebuild Kit

Page 1: ...ictaulic piping products Wear safety glasses hardhat and foot protection If you need additional copies of any literature or if you have any questions concerning the safe use of this product contact Victaulic P O Box 31 Easton PA 18044 0031 USA Telephone 1 800 PICK VIC e mail pickvic victaulic com WARNING 5 Year Rebuild Kit Instructions for FireLock NXT Valves SERIES 768 AND 769 I NXT RBKIT REBUILD...

Page 2: ...ifies possible hazards or unsafe practices that could result in personal injury and product or property damage if instructions including recommended precautions are not followed NOTICE The use of the word NOTICE identifies special instructions that are important but not related to hazards CONTENTS OF REBUILD KIT 5 6 8 9 9 11 7 10 1 2 3 4 Internal Components of the Valve Item Qty Description 1 1 Cl...

Page 3: ...rty damage 1 Notify the authority having jurisdiction remote station alarm monitors and those in the affected area that the system is being taken out of service 2 Open the water supply main drain valve fully to flush the water supply of any contaminants 3 Close the water supply main drain valve Water Supply Main Control Valve 4 Close the water supply main control valve to take the system out of se...

Page 4: ...any auxiliary drain valves 9 Close the slow fill ball valve on the Air Maintenance Trim Assembly AMTA 10 PUSH DOWN ON THE AUTO DRAIN SCREW TO REMOVE PRESSURE IN THE DIAPHRAGM CHARGE LINE I NXT RBKIT_3 5 Year Rebuild Kit Instructions for FireLock NXT Valves SERIES 768 AND 769 I NXT RBKIT REBUILD KIT INSTRUCTIONS www victaulic com VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY 2010 VICTAUL...

Page 5: ...over plate and cover plate gasket Discard the old cover plate gasket NOTE The 11 2 inch 48 3 mm and 2 inch 60 3 mm valve sizes contain washers under the heads of the cover plate bolts Keep these washers for re installation 3 Push the latch back toward the diaphragm 4 Remove the clapper shaft bushings from the valve body 5 Remove the clapper shaft NOTE As the shaft is being removed the clapper spri...

Page 6: ...improper valve operation resulting in serious personal injury and or property damage This Side Must Face Toward Diaphragm This Side Must Face Toward Outside of Valve 9 Insert the new latch shaft supplied with the kit through the valve body and into the first arm of the shaft MAKE SURE THE RECESSED SIDE OF THE LATCH FACES TOWARD THE OUTSIDE OF THE VALVE BODY AS SHOWN ABOVE 10 Place a spring insert ...

Page 7: ...ll the clapper spring onto the clapper shaft Make sure the loop of the clapper spring is facing toward the clapper as shown above 17 Finish inserting the clapper shaft through the clapper arm and valve body 18 Apply a thin coat of Victaulic lubricant or silicone lubricant to the o ring on each clapper shaft bushing Install the clapper shaft bushings into the valve body until hand tight 19 Tighten ...

Page 8: ...clapper seal Remove and discard the seal washer 24 Pry the old clapper seal along with the seal ring out of the clapper Discard the clapper seal and seal ring 25 Install the new clapper seal assembly supplied with the kit into the clapper carefully Make sure the seal ring snaps into the clapper completely I NXT RBKIT_7 5 Year Rebuild Kit Instructions for FireLock NXT Valves SERIES 768 AND 769 I NX...

Page 9: ...73 0 10 76 1mm 3 000 90 76 1 10 3 3 500 90 88 9 10 4 4 500 110 114 3 12 165 1mm 6 500 160 165 1 18 6 6 625 160 168 3 18 8 8 625 160 219 1 18 29 Align the holes of the new cover plate gasket provided with the kit with the holes in the cover plate 30 Insert one cover plate bolt through the cover plate and cover plate gasket to ease alignment NOTE For 11 2 inch 48 3 mm and 2 inch 60 3 mm valve sizes ...

Page 10: ... 115 165 1 156 6 6 625 115 168 3 156 8 8 625 100 219 1 136 INSTRUCTIONS FOR REPLACING THE DIAPHRAGM ITEM 11 ON PAGE 1 WARNING Make sure the valve is depressurized and drained before attempting to remove any trim from the valve Failure to depressurize and drain the valve before removing any trim from the valve could cause serious personal injury and or property damage If the system is in service fo...

Page 11: ...dy Tighten all cap screws into the diaphragm cover valve body 7 Re attach the trim at the unions that were loosened in step 1 Refer to the applicable trim drawing for details MAKE SURE ALL UNIONS THAT WERE LOOSENED TO PERMIT ACCESS TO THE DIAPHRAGM COVER ARE RE TIGHTENED BEFORE ATTEMPTING TO PLACE THE SYSTEM BACK IN SERVICE 8 Place the system back in service by following the Placing the System in ...

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