YASKAWA MOTOMAN-MPX2600 Instructions Manual page 102

MPX2600
10 Maintenance and Inspection
10.3 Inspection of the Explosion-Proof Device
 Operation check of pressure reducing valve
A flow-meter (measurable range of 0 to 5 L/min is included) and the
joint or hose etc. which are connected with the flow-meter for checking the
conduction are prepared by the customer.
Note that the plug size for the exhaust side of the pressure adjusting valve
is Rc1/4.
Refer to Fig. 10-14 "Operation Check for Pressure Adjusting Valve".
1. Turn OFF the power supply to the DX200.
2. Unscrew the hexagon socket head cap screws to remove the pressure
unit cover. (Refer to Fig. 10-10 "Pressure Switch Unit Cover".)
3. Set the pressure of operation air reducing valve as shown in Table
10-11 "Reducing Valve for Operating Pressure-Adjusting Pressure 1-".
Refer to section 10.3.1.2 "Operation Method of Pressure Reducing
Valve" for the pressure reducing valve operation.
Table 10-11: Reducing Valve for Operating Pressure-Adjusting
Pressure 1-
Pressure reducing valve
for the operating pressure
4. Connect the flow meter to the pressure adjusting valve exhaust side.
5. Check that the flow-meter indicates 5 L/min when the operating
pressure is 0.05 MPa.
6. Set the pressure of operation air reducing valve as shown in Table 10-12
"Reducing Valve for Operating Pressure-Adjusting Pressure 2-".
Refer to section 10.3.1.2 for the pressure reducing valve operation.
Table 10-12: Reducing Valve for Operating Pressure-Adjusting
Pressure 2-
Pressure reducing valve
for the operating pressure
7. Check that the flow-meter indicates 0 L/min when the operating
Pressure is 0.02 MPa.
8. Remove the flow-meter.
9. Set the pressure of both purging air and operation air reducing valves
as shown in Table 10-13 "List of Setting Value for Pressure Reducing
Valve for Purging Pressure and Operating Pressure".
Refer to section 10.3.1.2 for the pressure reducing valve operation.
Table 10-13: List of Setting Value for Pressure Reducing Valve for Purging
Pressure and Operating Pressure
Pressure reducing valve
for purging pressure
Pressure reducing valve
for the operating pressure
Pressure [MPa]
0.05
Pressure [MPa]
0.02
Pressure [MPa]
0.18 to 0.20
0.01 to 0.02
10-21
180788-1CD
HW1484370
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