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9. The pump cannot transfer gas. Do not allow it to idle for a long time.
If the pump is operated for a long time without any fluid inside or in a gas-fluid mixed state, the
diaphragm may be damaged or the life may be shortened. Do not continue idling for 3 minutes or
longer.
10. Condensation and freezing of the pilot port
The location around the switching valve and the air exhaust port can cool down quickly due to
expansion of the supply air, and this may cause condensation on the piping and the condensation
may freeze during operation in winter. Take measures to ensure that water droplets from
condensation are not splashed onto any electric parts or equipment.
11. Condensation and freezing of the directional control valve
Condensation and freezing may occur in the directional control valve due to the same cause as
10. Condensation and freezing of the pilot port. In this case, decrease the dew point of the supply
air, decrease the pilot air pressure, or reduce the discharge air.
Caution
1. Suspension of the pump operation
When operation is stopped exhaust the residual pressure of the air supply port using the 3-port
solenoid valve. Stopping the process pump while air is supplied, load is applied to the internal
parts and the life will be shortened. If the process pump is stopped consuming the residual
pressure, the operation of the switching part of the pilot air in the process pump becomes
unstable and may not be restarted. When the operation cannot be restarted, press the reset
button or supply air to the air operated reset port.
2. Use the constant pilot air pressure.
The automatically operated type of some models adopts an air spring for the built-in air control
circuit, and the pump may malfunction and stop when the pilot air pressure fluctuation exceeds 50
kPa.
3. Reverse flow
The check valve inside the process pump does not completely stop reverse flow (the flow from
the discharge side to the suction side). For this reason, fluid may sometimes flow from the
discharge side to the suction side when the pump is stationary, etc). As a countermeasure, install
a 2-way valve or a check valve. However, please note that when a check valve is installed, if the
cracking pressure is high, defective suction may occur. (As a guide, the cracking pressure should
be 0.02 MPa or less.)
2. Mounting
Caution
1. Read the operation manual before mounting the product.
Read the operation manual carefully and understand the contents before mounting the product.
The manual should also be kept where it can be referred to whenever necessary.
2. Open the sealed package inside a clean room.
Products specified for clean room (PAP3310) are sealed and double packaged inside a clean
room. We recommend that the inner package should be opened inside a clean room or clean
environment.
3. Confirm the mounting orientation of the product.
Face the foot downward. Even when the foot is not used, the foot faces downward.
Also, secure all specified mounting positions when using the product.
If the propagation of the vibration of the pump is not acceptable, insert vibro-isolating rubber when
mounting.
3. Piping
Caution
1. Flush the piping.
Flush and clean the piping before connecting the product. Any dirt or scale and the like left in the
piping may cause malfunction or failure.
2. Use fittings with resin threads when connecting piping to the product with resin threads at
the ports.
Using fittings with metal threads may cause damage to the ports.
