ASAHI AV VALVES Installation, Operation and Maintenance Manual
Butterfly Valve Type 57, 56, 56D Electric Actuated Type S 4
(4) Name of parts
Type 57: 40-350mm (1 1/2”-14”)
Body material: U-PVC, PP, PVDF
No. DESCRIPTION No. DESCRIPTION No. DESCRIPTION
[1] Body [30] Stand [157] Screw (F)
[2] Disc [35] Actuator [183] Seat Bush (A)
[3] Seat [36] Stem bush [184] Seat Bush (B)
[6] O-ring (C) [38] Bolt (E) [185] O-Ring (I)
[7] Stem [39] Bolt (K)
[8] Stem Holder (A) [40] Key (B)
Nominal size: 40-250mm (1 1/2”-10”)
Nominal size: 300, 350mm (12”, 14”)
*1 Parts shown as ( ) is only used for 125mm (5”), 150mm (6”).
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