TM 10-4610-237-12
4.16 GATE VALVE ASSEMBLY (2-INCH) REPAIR.
This task consists of.
a.
Disassembly
b.
Cleaning
c.
Inspection
d.
Repair
e.
Assembly
INITIAL SET-UP:
Tools:
Material/Parts:
General Mechanics Tool Kit (Item 1, App. B)
Detergent, General Purpose (Item 1, App. E)
Pipe Wrench (Item 4, App. B)
Wiping Rag (Item 2, App. E)
Vice (Item 2, App. B)
Tape, Anti-seize (Item 3, App. E)
Equipment Condition:
Coupling Gasket (Item 2, App. I)
Gate valve assembly removed (para. 3.4a)
Packing (Item 11, App. I)
NOTE
Ensure that all parts identified as mandatory replacement parts are discarded and replaced with
new components.
a.
Disassembly. Refer to Figure 4-7.
(1)
Clamp gate valve body (13) in vise.
(2)
Remove plug (1) from female coupling (2).
(3)
Disconnect ring (1A) from female coupling (2).
(4)
Remove gasket (2A) from female coupling (2).
(5)
Using pipe wrench, unscrew female coupling (2) from valve body (13).
(6)
Using pipe wrench, unscrew male coupling (3) from valve body (13).
(7)
Remove cap (3A) from male coupling (3) and remove gasket (3B) from male coupling (3).
(8)
Disconnect ring (3C) from male coupling (3).
(9)
Turn handwheel (5) fully clockwise to close valve.
(10)
Remove handwheel nut (4) and handwheel (5) from stem (11).
(11)
Using pipe wrench, remove bonnet ring (9) from valve body (13). Lift bonnet (10) and attached parts
from valve body.
(12)
Slide disc (12) from end of stem (11).
(13)
Unscrew packing nut (6) from bonnet (10).
(14)
Remove packing gland (7) and packing (8) from bonnet (10).
(15)
Unscrew stem (11) from bottom of bonnet (10).
4-28 Change 1
