STP-H803/H1303 Series Instruction Manual
7.2 Start
Procedures
Start the backing pump before or simultaneously with start of the STP pump.
Open the vacuum valve located at the outlet port flange side after starting the
backing pump.
◇
DO NOT open the vacuum valve without operating the backing pump.
Depending upon the type of the backing pump, doing so may cause a
reverse flow of oil, which could contaminate the inside of the STP
pump.
O
pe
ra
tio
n
◇
When start/stop operations are frequently performed, the STP pump
may overheat. Avoid doing so.
7.3 Stop
Procedures
Close the vacuum valve located at the outlet port flange side just before or after
stopping the STP pump.
After closing the valve, stop the backing pump.
◇
DO NOT stop the backing pump without closing the vacuum valve.
Depending upon the type of the backing pump, doing so could cause
a reverse flow of atmospheric air into the STP pump, which may
result in a malfunction.
◇
DO NOT stop the backing pump without closing the valve.
Depending upon the type of the backing pump, doing so may cause a
reverse flow of oil, which could contaminate the inside of the STP
pump.
7-2
