Butterfly Valve Type-57P
Butterfly_Valve_Type57P_Install
Rev. B
Operating procedure
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Open and Close the valve by turning handle slowly. Turn clockwise to Close, counterclockwise to
Open.
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Lever Type – The direction of the handle is the same as the disc
For full Closed position, the handle is perpendicular to the piping
For Full Open position, the lever handle is parallel to the piping system.
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Gear type
For full Closed, the indicator shows Shut.
For full Open, the indicator shows Open.
General operating Instructions
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Operate the valve within the pressure vs. Temperature range as per table below, otherwise the
valve can be damaged
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Select a valve material that is suitable for the media. (Refer to Chemical Resistance on AV Valve)
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Do not step on valve or apply excessive weight (the valve can be damaged)
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Allow sufficient space for maintenance and inspection
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Keep the valve away from excessive heat or fire. (Valve can become deformed or destroyed)
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Make sure to properly dispose of used valves. (Poisonous gas is generated when burned
improperly)
Caution: Do not attempt to repair or replace parts while valve is under pressure.
Refer to Asahi/America Type-57P Operation and Maintenance manual for Disassembly/Assembly or valve
repair
.
General Instructions for Transportation, Unpacking and Storage
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Keep the valve packed in original carton box as delivered until installation
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Keep the valve away from any coal, tar, creosote (antiseptic for wood) termite insecticide,
vermicides and paint. (Could cause swelling and damage to the valve)
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Do not impact or drop the valve (It can be damaged)
Visual Maintenance Inspection
1) Check for flaws, cracks, or deformation of the valve.
2) Check for any leaks to the outside of the valve.
3) Check for seat/disc deformation due to improper installation of the valve.
4) Check for smoothness of handle operation.
Troubleshooting
Problem
Cause
Treatment
Fluid leaks in the closed Position
1) Travel stop is not properly set
2) The seat is damaged or worn
3) Foreign materials are trapped
4) the disc is damaged or worn
5) Flange bolt torque uneven/wrong
Adjust the stop
Replace the seat
Remove material
Replace the disc
Adjust and retighten
Fluid leaks to the outside
1) The seat is damaged or worn
2) Flange bolts are not tight or
unevenly torqued
Replace the seat
Properly torque flange bolts
The Handle does not operate
smoothly
1) Foreign materials on disc/seat
2) Gear-op is damaged
3) Flange bolts are overtightened
Remove the materials
Repair and Replace
Adjust and Torque bolts
Valves do not operate
1) The gear-operator is damaged
2) The stem is damaged
Replace Gear operator
Replace the stem