1. MOUNTING
8
1.5 Gate Valve GV-50B-6B, GV-200B-8B (option)
Assemble the gate valve as shown below. Refer to the drawing at the end of this man-
ual.
1. Disassemble the gate valve as-
sembled tentatively: spacer,
gasket1, gate valve, gasket 2,
seachest cap and shaft assem-
bly.
When assembling the gate
valve, use original washers,
bolts and nuts. Keep the bot-
tom of the seachest cap and
the shaft free of dust and be
careful not to damage them.
2. Weld the spacer to the hull bot-
tom.
The hull side of the spacer
should be flush with the hull
bottom. Be careful not to dam-
age the side fixed to the gate
valve.
3. Clean the side of the spacer to
be fixed to the gate valve.
4. Grease (supplied) both sides of
the gasket 1 and the inner side
of the spacer. Place the gasket 1 onto the spacer.
5. Clean the flange side of the gate valve, and place it on the gasket 1. The scale
side of the gate valve should be up.
6. Fix stud bolts of the spacer with washers and bolts loosely.
7. Keep seachest cap and shaft assembly free of dirt and dust.
8. Grease (supplied) both sides of the gasket 2 and place it onto the gate valve.
9. Place seachest cap and shaft assembly onto the gasket 2.
10. Fix the assembly with bolts, nuts and washers loosely.
11. Unscrew nuts from flange 2, and confirm
that shaft can be moved up and down
smoothly by hand.
You will feel some resistance because of
the O-ring (P135).
12. Fasten the gate valve with bolts, nuts and
washers above and below.
Note: When installing a transducer, do it be-
fore step 7 or after removing the seachest cap
and the shaft assembly.
Spacer
Nut
Washer
Gate
Valve
Nut
Washer
Bolt
Gasket 2
Seachest
cap
Shaft
O-ring (P135)
Scale
Gasket 1
Stud bolt
Bolt
M6×25
Shaft
Flange
O-ring
Spring
washer
Damper
Transducer case
Transducer
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