6
2) Adjustment of discharged flow rate
(1) Use the throttle connected to discharge side to adjust discharge flow. Do not close valve
suddenly, as it generates surge and remarkably shortens pump life.
(2) When discharge flow is under range of specifications, keep minimum flow for process pump
by installing bypass circuit from discharge side to suction side. Discharge flow under
minimum flow may stop pump due to unstable operation.
●
Typical circuit
5. Maintenance and check
1) During operation
- During operation of pump, it is necessary to check leakage of fluid and air and operating condition
periodically. If any abnormality or concern is seen, stop the pump immediately and contact local
supplier or SMC.
- When touching the pump for maintenance, put the protective tool such as glove which isn
’t
affected by transported fluid to prevent burn.
2) During stop
- If the pump is stopped for a few hours, exhaust the air at supply side.
- If the pump is left unused for extended period, clean inside of the pump to prevent adherence and
sticking of transported fluid over the time which could cause abnormal operation.
3) Check and repair
- Replace the diaphragm before it reaches referential life cycles (specified cycles). If the pump is
continued after the life of diaphragm, the check valves of wetted part as well as the diaphragm are
deteriorated and operating failure could be caused.
Process Pump
Bypass
