TM 10-4320-345-13
4-15.
GATE VALVE ASSEIMBLY(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 2, App B)
Wiping Rag (Item 2, App E)
Vice (Item 2, App B)
Tape, Anti-seize (Item 4, Appendix E)
Equipment Condition :
Coupling Gasket (Item 1, App I)
Gate valve assembly removed (para 3-4a)
Packing (Item 7, App I)
NOTE
Ensure that all parts identified as mandatory replacement parts are discarded and replaced with
new components
a.
Disassembly.
Refer to figure 4-2.
(1)
Clamp gate valve body (13) in vise.
(2)
Remove gasket (1) from female coupling (2).
(3)
Using pipe wrench, unscrew female coupling (2) from valve body (13).
(4)
Using pipe wrench, unscrew male coupling (3) from valve body (13).
(5)
Turn handwheel (5) fully clockwise to close valve.
(6)
Remove handwheel nut (4) and handwheel (5) from stem (11).
(7)
Using pipe wrench, remove bonnet ring (9) from valve body (13) Lift bonnet (10) and
attached parts from valve body.
(8)
Slide disc (12) from end of stem (11).
(9)
Unscrew packing nut (6) from bonnet (10).
(10)
Remove packing gland (7) and packing (8) from bonnet (10).
(11)
Unscrew stem (11) from bottom of bonnet (10).
b.
Cleaning.
(1)
Wash all components with clean water and detergent.
(2)
Rinse components in clean water and dry with wiping rag.
4-24
