Connected to the STP pump cooling water pipe. This port is 
used when water cooling the STP pump or using the TMS 
unit. 
Introduces a purge gas. 
In order to protect the inside of the STP pump when pumping 
reactive or corrosive gas, gas including hydrogen. 
The STP pump is delivered with a blank flange attached to this 
port. 
The STP pump in Figure 9 is a typical pump model. Refer to the STP Pump Instruction Manual (B). 
*1  Depending upon the pump model, the TMS unit (optional accessory) is not available. Refer to the STP Pump Instruction 
Manual (B) for more detailed information. 
*2  Depending upon the pump model, the TMS sensor is built in the STP pump. Refer to the STP Pump Instruction Manual (B) 
for more detailed information. 
*3  Depending upon the pump model, the STP pump is not equipped with water cooling unit. Refer to the STP Pump 
Instruction Manual (B) for more detailed information. 
*4  Depending upon the pump model, the STP pump is not equipped with a purge port. Refer to the STP Pump Instruction 
Manual (B) for more detailed information.