18
Operating conditions
Operation and Stoppage
■ During operation
Make sure a suction and a discharge line are fully opened
.
■ When stopping the pump
•
Before stopping the pump, make sure the discharge line is open to the atmosphere. Otherwise, the bellows
may deform.
•
Do not close a discharge valve as stopping the pump, or an impact pressure may damage the bellows or
check valves.
■ During stoppage
• Always check the specification of the double solenoid valve before installation. Some types (pressure centre
types) are designed to pressurize both the right and left air chambers at the same time.
• Do not leave the pump with any chemical in the bellows for a long period. Some chemical gas can penetrate
the bellows and corrode metal parts.
Air exhaust port
Do not narrow an air exhaust line (for example by reducing the tube I.D.). Or the residual pressure in the pump
may damage the bellows.
* Always observe the minimum composite effective cross-sectional area. Do not extend the air exhaust port too far away
from the solenoid valve (SV) or the quick exhaust valve (QEV). Otherwise, increased pipe resistance may break the limit.
Leak sensors
The sensors occasionally fails to detect leakage depending on operating conditions. Contact us for detail.
Ambient temperature
Observe the allowable operating ambient temperature range of 0-60ºC.
Pump surface temperature
Risk of burning. The surface temperature of the pump or pipe rises high along with liquid temperature in or
right after operation. e.g. cylinder surface temperature rises up to 73
º
C when liquid temperature is 180
º
C and
ambient temperature is 60
º
C.
Noise from pump
Exhaust noise accompanies pump operation. Provide noise insulation as necessary. e.g. a noise level rises up
to 79.4dB (A) at 150spm and 0.3MPa (supply air pressure).