23
4. Connection
4. Connection4. Connection
4. Connection
4.1 Connecting fluid piping
4.1 Connecting fluid piping 4.1 Connecting fluid piping
4.1 Connecting fluid piping
1) Connect a flow valve and a drain valve to the fluid discharge port of the pump.
2) Connect a valve for maintenance to the fluid suction intake port of the pump.
3) Connect a hose to the valve on the suction-port side and the valve of the discharge-port side of the pump.
4) Connect a hose on the suction-side intake and the discharge-port side to the respective vessels.
Fig.4.1
CAUTION
CAUTIONCAUTION
CAUTION
•Use a flexible hose to absorb pump vibration, and ground the hose.
•Make sure that there will be no external force on any connection part of the pump.
Be especially careful not to have the pump support part of the weight of the hose and the piping.
•Use a sturdy hose that will not collapse under the strong suction of the pump. Also, make sure
the hose is of more than sufficient pressure rating.
•Use a hose of a diameter the same as or larger than the pump's ports. If you use a hose of
smaller diameter, the pump's performance will be adversely affected, and it may even malfunction.
•When pumping a fluid that contains slurry, verify that the particle size is below the
slurry limitation (after p.30, 10.1 Main specifications).
If it exceeds the limitation of slurries indicated in the main specifications, attach a strainer to
the pump to stop larger particles. Otherwise, such particles may cause a malfunction.
•If, depending upon the place of pump installation, the
volume of the pumped fluid changes drastically, install a
relief valve on the discharge side, and bring the pressure
down below the maximum permissible value. If, owing to
a change in the volume of fluid, the pressure inside the
pump exceeds the maximum permissible pressure, it
may cause damage.
•Keep a vessel below the relief valve to catch any
drain off.
Fig. 4.2
•When testing piping for leakage, do NOT apply pressure to the pump's inlet and outlet sides with
compressed air from outside. It may cause abnormal breakage to the diaphragm or the switching
portion. When testing the piping, either install a valve between the pump's suction inlet and the
discharge outlet and piping, or disconnect the pump from the piping and install plugs so that there
will be no pressure from outside.
•In our product inspection, clean water (pure water for the DP-F series) is used. To prevent mixture
of dirty water into the fluid to be pumped, clean the inside of the pump before finishing installation
work.
•When installing a standby pump or two pumps in parallel, be sure to provide a valve on each of
the IN and OUT sides and perform pump switching by using the liquid material valve. If the
valve of the stop-side pump is open, the diaphragm will be inverted by the discharge pressure of
the operating-side pump, resulting in damage in an early stage.
To Next Page
Loading...
Need help?
General
