10
4-5
．
Speed control
Be sure to control speed to open and close the gage in
meter out
condition. Otherwise, the Gate valve life will
be adversely affected. Improper use of speed controls can damage end-lock mechanism as well as shorten life
time of valve.
4-6
．
Exhaust piping
Avoid system designs that combine additional solenoid valves to the Gate valve. The added exhaust pressures from
other solenoid valves may cause improper operation of the end lock mechanism.
4-7
．
Operation of valve
1)
Please confirm in regulated differential pressure of 4kPa and during the opening and shutting operation of the
valve.
OPEN / CLOSE
2)
Incase the
Body (Chamber)
and
Gate
are heated and cooling gradually from High Temperature to Room
temperature then please make
OPEN
condition. If it is cooling at
CLOSE
condition then Gate O -ring
could become stuck and when operated to
OPEN
condition. This condition will pull out the O-ring
Warning
3)
Maintain and monitor
specified
operating pressure range of Gate valve. System design can change over time
providing
Over/Under
pressurization. The internal components could be damaged by improper pressure.
4)
Do not put your hands near moving components or into the opening of the body without confirming safety. The
closing forces will cause injury and bodily harm if the valve is operated.
5)
Do not remove the Cover on the actuating part. The cover shields internal components while the Gate valve is
operating prevent injury.
6)
Remove the pneumatic tubing from valve operation and confirm cylinder has no pressure prior to maintenance.
Be aware of your system design and latent energy stored to prevent accidental actuation. These steps will ensure
that stored energy is removed. Additionally, pneumatic lines disconnected could create a potential hazard if
energized.
Caution
4-8
．
Replacement of O-ring
Use the parts shown on “4. Replacement parts list” when replacing bonnet assembly, Gate and O
-rings for a gate.
Give sufficient cleaning to O-ring groove and mount O-ring in gland avoiding twisting. Use a plastic specific tool so as
not to damage sealing surface of the O-ring groove. Refer to the maintenance manual for details. After replacement,
confirm vacuum by leak inspection.
Warning
4-9
．
Return of Product
Vacuum products must be decontaminated prior to returning to SMC. The substances used in process application
must be identified with certified removal of contaminants. The return authorization number will only be provided
after the decontamination form has passed evaluation. The decontamination form is submitted by Product Return
Request Sheet or Detoxification/Decontamination certificate to SMC and await return contact from SMC before
returning the item to SMC. Please refer to International Chemical Safety Cards (ICSC) for a list of the harmful
substances. If you have any questions, please contact your SMC sales representative.
