Victaulic 5-Year Rebuild Kit Bedienungsanleitung

WARNING

Failure to follow instructions and warnings can cause product

failure, resulting in serious personal injury and property damage.

• Read and understand all instructions before attempting

to install, remove, adjust, or maintain any Victaulic piping

products.

• Depressurize and drain the piping system before attempting

to install, remove, adjust, or maintain any Victaulic 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 KIT INSTRUCTIONS

www.victaulic.com

REV_A

TABLE OF CONTENTS

Hazard Identification ......................................1

Contents of Rebuild Kit ....................................1

Removing the System from Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Instructions for Replacing Internal Components of the Valve

(Items 1 - 10 on Page 1) .................................4

Instructions for Replacing the Diaphragm (Item 11 on Page 1). . . . . . . 9

HAZARD IDENTIFICATION

Definitions for identifying the various hazard levels are

provided below. When you see this symbol, be alert to the

possibility of personal injury. Carefully read and fully

u nderstand the message that follows.

WARNING

• The use of the word “WARNING” identifies the presence

of hazards or unsafe practices that could result in death or

serious personal injury if instructions, including recommended

precautions, are not followed.

CAUTION

• The use of the word “CAUTION” identifies 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

Internal Components of the Valve

Item Qty. Description

11Clapper Seal

21Seal Ring

3* 1Seal Washer

41Bolt Seal

51Clapper Shaft

61Latch Shaft

71Clapper Spring

81Latch Spring

92Latch Spring Insertion Tool

10 1Cover Plate Gasket

11 1Diaphragm

* Item #3 is not applicable for 1 ½ – 2-inch/48.3 – 60.3-mm valve sizes.

I-NXT.RBKIT_1

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

REMOVING THE SYSTEM FROM SERVICE

WARNING

• Depressurize and drain the piping system

before attempting to remove the cover plate

from the valve.

Failure to follow this instruction could result

in serious personal injury and/or property

damage.

CAUTION

• Any activities that require taking the

valve out of service may eliminate the fire

protection provided.

• Before servicing or testing the system,

notify the authority having jurisdiction.

• Consideration of a fire patrol should be

given in the affected areas.

Failure to follow these instructions could

result in serious personal injury and/or

property 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

service.

5. Open the water supply main drain valve.

6. Confirm that water is not flowing from the water supply main drain

valve.

I-NXT.RBKIT_2

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKIT

REBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

7. Close the diaphragm-charge-line ball valve.

8. Open the system main drain valve to drain any water that has

accumulated and to release system air pressure.

NOTE: If the system has operated, open the remote system test valve

(inspector’s test connection) and 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.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

INSTRUCTIONS FOR REPLACING INTERNAL

COMPONENTS OF THE VALVE

(ITEMS 1 - 10 ON PAGE 1)

WARNING

• Make sure the valve is depressurized

and drained completely before the

cover plate bolts are removed.

The cover plate could blow off if the

cover plate bolts are removed while the

valve is pressurized, resulting in serious

personal injury and/or property damage.

1. After all pressure is released from the system, loosen the cover

plate bolts slowly. NOTE: DO NOT remove any cover plate bolts

until all cover plate bolts are loosened.

2. Remove all cover plate bolts, along with the cover plate and

cover plate gasket. Discard the old cover plate gasket. NOTE:

The 1 ½-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 spring will drop out of position. Discard the clapper

spring.

6. Remove the clapper from the valve body.

I-NXT.RBKIT_4

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKIT

REBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

7. Remove the latch-shaft retaining plugs from the valve body.

WARNING

• DO NOT allow the latch to drop onto the valve-body seat ring.

Failure to follow this instruction will damage the valve-body seat

ring and cause improper valve operation, resulting in serious

personal injury and/or property damage.

8. Remove the latch shaft. NOTE: As the latch shaft is being

removed, the latch and latch spring will drop out of position. BE

PREPARED TO SUPPORT THE LATCH AND LATCH SPRING

DURING REMOVAL OF THE LATCH SHAFT. DO NOT ALLOW

THE LATCH TO DROP ONTO THE VALVE-BODY SEAT RING.

Discard the latch shaft and latch spring. Save the latch for

re-installation.

WARNING

• Make sure the latch is re-installed in the correct orientation.

Failure to re-install the latch in the correct orientation could

cause 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 tool (supplied with the kit) onto each arm of

the new latch spring (supplied with the kit). Using the spring insert

tool to close the latch spring arms together slightly, install the latch

spring onto the latch shaft, as shown above.

11. Continue to pass the latch shaft through the other arm of the latch

and valve body.

I-NXT.RBKIT_5

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

12. REMOVE THE SPRING INSERT TOOLS FROM THE ARMS OF

THE LATCH SPRING.

13. Apply a thin coat of Victaulic lubricant or silicone lubricant to the

o-ring on each latch-shaft retaining plug. Install the latch-shaft

retaining plugs into the valve body.

13a. Tighten the latch-shaft retaining plugs until metal-to-metal contact

occurs with the valve body.

14. Place the new clapper assembly onto the valve-body seat ring.

Make sure the holes in the clapper arms align with the holes in the

valve body.

15. Insert the clapper shaft halfway into the valve body.

16. Install 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 the clapper shaft bushings until metal-to-metal contact

occurs with the valve body.

I-NXT.RBKIT_6

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKIT

REBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

20. Check the clapper for freedom of movement.

21. Rotate the clapper out of the valve body. Remove the seal

assembly bolt/bolt seal from the clapper seal, as shown above.

Save the seal assembly bolt for re-installation. Discard the bolt

seal.

22. Remove the seal-retaining ring. Save the seal-retaining ring for

re-installation.

23. Pry the edge of the old seal washer from inside the 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-NXT.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

26. Install the new bolt seal (supplied with the kit) onto the seal-

assembly bolt.

27. Place the seal-retaining ring onto the seal washer of the clapper

seal. Install the seal-assembly bolt/bolt seal through the seal-

retaining ring and clapper.

28. Tighten the seal-assembly bolt/bolt seal to the torque value listed

in the table on this page to ensure a proper seal.

REQUIRED SEAL-ASSEMBLY BOLT/BOLT SEAL TORQUES

Size Torque

Nominal Size

inches

Actual

Outside Diameter

inches

inch-lbs

N•m

1 ½ 1.900 40

48.3 5

22.375 40

60.3 5

2 ½ 2.875 90

73.0 10

76.1 mm 3.000 90

76.1 10

33.500 90

88.9 10

44.500 110

114.3 12

165.1 mm 6.500 160

165.1 18

66.625 160

168.3 18

88.625 160

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 1 ½-inch/48.3-mm and

2-inch/60.3-mm valve sizes, a washer must be re-installed under

the head of each cover plate bolt.

I-NXT.RBKIT_8

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

CAUTION

• DO NOT over-tighten the cover plate bolts.

Failure to follow this instruction could cause damage to the

cover plate gasket, resulting in valve leakage.

31. Align the cover plate/cover plate gasket to the valve. Make sure the

clapper spring’s arms are rotated to their installed position. Tighten

all cover plate bolts into the cover plate/valve body.

32. Torque all cover plate bolts in an even, crossing pattern. Refer

to the “Required Cover Plate Bolt Torques” table below for the

required torque values. DO NOT over-tighten the cover plate bolts.

Required Cover Plate Bolt Torques

Size Torque

Nominal Size

inches

Actual

Outside Diameter

inches

ft-lbs

N•m

1 ½ 1.900 30

48.3 41

22.375 30

60.3 41

2 ½ 2.875 60

73.0 81

76.1 mm 3.000 60

76.1 81

33.500 60

88.9 81

44.500 100

114.3 136

165.1 mm 6.500 115

165.1 156

66.625 115

168.3 156

88.625 100

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, follow the “Removing the System from

Service” section.

1. Break the unions that connect the trim to the diaphragm cover.

Refer to the applicable trim drawing for details.

2. Remove the cap screws from the diaphragm cover, and pull the

diaphragm cover/trim off the valve.

3. Remove the old diaphragm from the valve body. Discard the

diaphragm.

I-NXT.RBKIT_9

5-Year Rebuild Kit Instructions for

FireLock NXT™ Valves

SERIES 768 AND 769

I-NXT.RBKITREBUILD KIT INSTRUCTIONS

www.victaulic.com

REV_A

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