ASAHI AV VALVES Installation, Operation and Maintenance Manual
Butterfly Valve Type 57, 56, 56D Electric Actuated Type S 21
- Make certain stem hole of seat are properly aligned. The upper side stem hole of seat bush A [183] has
lager than seat bush B [184] of lower side. When the stem bush is assembled oppositely, the stem [7]
cannot be inserted.
- Make certain tabs are properly aligned.
6) Insert the stem [7] of the body [1].
7) Install the stem holder [8] onto valve body [1] with countersunk holes facing up using 4 screws [157].
8) Install the actuator [35] and stand [30] onto the valve body using bolt (E) [38] and bolt (K) [39].
9) After assembly, make sure that the valve can be fully opened and closed smoothly.
10) Fully open or close the valve by motor-driven operation. (Refer to page 17)
Assembly Procedure
- Nominal size 400mm (16”)
1) Before starting assembly, grease (Silicone) should be spread on the
O-ring.
2) Put the O-ring (C) [6] onto the stem [7]. Put the O-ring (A) [4]
and O-ring (B) [5] onto the disc [2].
3) Grease (Silicone) should be spread on the top and bottom disc [2],
the stem of the seat [3].
4) Put it into the state of open the valve slightly. Insert the set of seat
- disc [3] into the body [1].
5) Insert the stem [7] of the body [1].
6) To install gear operator reverse disassembly procedure #5).
*Make certain line scribed on top of stem [7] indicates disc [2]
position while installing stem [7].
7) After assembly, make sure that the valve can be fully opened and closed smoothly.
Nominal size: 400mm (16”)
Manual Han󲿧l󲿨
Actuator type: SRJ Actuator type: LTRM, LTMD, LTRH
Upper side:
Stem hole is large size
Lower side:
Stem hole is small size
Caution
Concave part of seat bush
Convex part of seat bush
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