I-768N / Series 768N FireLock NXT
™
Dry Valve / Installation, Maintenance, and Testing Manual
INTERNAL VALVE COMPONENTS – SECTION VIEW AND EXPLODED VIEW DRAWINGS
Clapper Seal
Latch
Clapper
Diaphragm
Assembly
Seat
Exaggerated for Clarity
Valve is shown in the “set” position
Item Description
1 Valve Body
2 Clapper
3 Clapper Seal
4 Seal Ring
5 Seal Washer*
6 Seal Retaining Ring
7 Seal Assembly Bolt
8 Clapper Spring
9 Clapper Shaft
10 Clapper Shaft Bushing and O-Ring (Qty. 2)
Item Description
11 Cover Plate
12 Cover Plate Gasket
13 Cover Plate Bolts
14 Latch
15 Latch Spring
16 Latch Spring Bushing and O-Ring (Qty. 2)
17 Diaphragm
18 Diaphragm Cover
19 Diaphragm Cover Cap Screws (Qty. 8)
20 Latch Shaft
The 1½-inch/48.3-mm and 2-inch/60.3-mm valve sizes contain washers under the heads of the cover plate bolts.
1
11
16
10
20
19
8
4
3
17
18
7
5
14
15
13
12
2
9
6
16
10
* Item 5 (Seal Washer) is not used in 1½-inch/48.3-mm and 2-inch/60.3-mm valve sizes.
I-768N_8 REV_C
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