Installation, Operation and Maintenance Manual
󲷇H-A058-E-12󲷈 Diaphragm Valve, True Union Diaphragm Valve (15-50mm, 1/2”-2”) Pneumatic Actuated Type AI
26
(16) Disassembling method for replacing parts
- Never attempt to disassemble an actuator.
(If disassembled under tension, internal parts may jump out and this is very dangerous.)
- Do not touch the actuator when it operated.
- Be sure to conduct a safety check on all hand and power tools to be used before beginning work.
- Wear protective gloves and safety goggles as fluid remain in the valve even if the pipeline is empty.
(You may be injured.)
Spanner wrench Protective gloves Safety goggles
<Disassemble>
Procedure
1) Completely discharge fluid from line.
2) Close main valve for air and open bypass valve to discharge
air from the actuator.
3) Remove air line.
4) Loosen bolt [40] between the body and the actuator.
5) Remove actuator [28], [29], [30].
6) Remove diaphragm [3] by turning it 90 degrees.
7) Remove compressor [6].
8) Remove joint [7].
9) Remove Compressor pushing plate [33].
<Assembly>
Procedure
Assembly by using reverse procedures on steps 9) to 1).
(As to the body tightening torque, refer to Table 1.)
* Nominal size 15 mm; Use the assembly tool (Option).
(Table 1) Body tightening torque value Unit:Nm {kgfcm} [lbinch]
Nominal size
Diaphragm
material
15mm, 20mm
(1/2”, 3/4”)
25mm, 32mm
(1”, 1 1/2”)
40mm
(1 1/2”)
50mm
(2”)
Rubber
3.0
{31}
[27]
5.0
{51}
[44]
12.0
{122}
[106]
15.0
{153}
[133]
PTFE
5.0
{51}
[44]
8.0
{82}
[71]
15.0
{153}
[133]
20.0
{204}
[177]
Bypass valve knob
Open
Close
Assembly tool (Option)
Warning
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