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2. Install a filter or strainer with low piping resistance on the suction piping to block the entrance of solid
particles or wafer fragments.
CAUTION! Wafer fragments inside the pump may get stuck in the bellows and cause
damage. If solid matter clogs the pump's valves, internal suction or discharge volume may
be affected with the normal checking function disabled.
3. When installing a valve on suction piping, select a valve with a larger orifice than the inner diameter of
the pipe. A smaller orifice may result in a larger suction piping resistance or an increased chance for
the valve to become clogged with a crystallized substance. Make sure to keep the valve open during
pump operation.
CAUTION! Operating the pump with the valve on the suction piping closed will cause
inward deformation of the bellows.
4. Do not create air traps in suction plumbing.
Points to be observed in the discharge piping arrangement
1. The pump discharge load increases with the length of the discharge piping and the number of bends
along the pipe. Install a dampener to decrease the load and prevent pulsation.
2. When installing a valve on discharge piping, select a valve with a larger orifice than the inner diameter
of the pipe. A smaller orifice may result in a larger discharge piping resistance or an increase chance
for the valve to become clogged with a crystallized substance. Make sure to keep the valve open during
pump operation. Do not close the valve until the discharge pressure is completely released after the
pump is stopped.
CAUTION! Do not close the discharge valve to stop the pump. The resulting impactive
pressure may deform the bellows.
3. A filter must be selected to meet the pump type. Filtering area, grain-removing performance and flow
characteristics should be taken into consideration in selecting the filter. A desired flow rate may not be
achieved if the selection is wrong. Proper filter venting is critical.
CAUTION! The filter should be wetted before running process liquid. A desired flow
rate may not be achieved if the filter is not wetted sufficiently. The filter dries out if the
process liquid is not supplied for a long time. Read the filter instruction manual for details.
4. The piping should be designed so that no residual pressure results on the discharge side upon stopping
the pump. (For example, filter air elimination should be set full open or a return circuit should be
employed to remove residual pressure.)
CAUTION! Residual pressure in the discharge piping upon stopping the pump may
deform the bellows.