Periodical inspection, Inspection procedures – Yamato Scientific SQ 510 Autoclave, Sterilizers User Manual
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Periodical Inspection
Periodical Voluntary Inspection of Small-sized Pressure Vessel
Inspection procedures
Piping
①
Make sure that the drain valve and exhaust solenoid valve do not rotate by hand. Make sure
that no water droplets are adhered around the fitting area.
If the valves rotate or droplets are adhered, the piping is loose. Tighten it securely.
②
Make sure that the nut on the joint does not rotate when turned clockwise with a screw wrench.
Make sure that no water droplets are adhered around it.
If the valves rotate or droplets are adhered, the piping is loose. Tighten it securely.
③
Make sure that damages do not exist on the piping. Make sure that no water droplets are
adhered around it.
If the conditions above, especially water droplet, are observed on the areas other than the joint, the
piping must be replaced.
Pressure
①
Set up/connect the respective devices referring to the figure above.
②
Pressurize the chamber inside. When the corrected pressure gauge reads 0.05MPa, 0.1MPa
and 0.15MPa, compare the readings between the corrected pressure gauge and the pressure
gauge on the main unit.
The tolerance of pressure accuracy compared should be within ±0.005 MPa. If it is beyond this
range, replace the pressure gauge.
Safety valve
①
In order to confirm the operating pressure of safety valve, pressurize it to 0.15 MPa first and
then pressurize it gradually.
②
The valve should be actuated at the pressure between 0.25 and 0.26 MPa. Do not pressurize
it with 0.27 MPa or more.
If the valve is actuated in the range other than the above, adjust it according to the procedures
below.
【分解図】
スプリング
作動圧力低下
作動圧力上昇
緩む
締る
固定ネジ
1) Loosen the setscrew.
2) Adjust the operating pressure with a adjusting screw.
3) After the adjustment is completed, tighten the setscrew.
Pressure
device
Close the cover.
Corrected pressure gauge
Pressure-proof hose
Connected to the
drain valve
Operating pressure high
Operating pressure low
Tighten
Loosen
Setscrew
Deal drawing
Spring