SMC Networks PB1313A Operation Manual page 16

3) Viscosity characteristics
With reference to the viscosity characteristic graph (shown below), discharge amount of
transported fluid with higher viscosity can be calculated.
●How to calculate the pilot air pressure and consumed air flow
< Example of required specifications >
-Discharge : 200mL/min
-Solenoid valve cycle : Calculate the pilot air pressure and consumed air flow at 5Hz
1．First, check the ratio of discharge amount to clean water from the graph above when the
viscosity is 15mPa･s.
From the graph it is approx. 40%.
2．Next, convert it to discharge rate of clean water.
40% of the discharge of clean water corresponds to 200mL/min. of required specification.
Therefore 200mL/min / 0.40 = approx. 500mL/min, meaning that 500mL/min. of
discharge is necessary for clean water.
3．According to the flow characteristic graph, mark the intersection of discharge pressure
0.2Mpa and discharge amount 500mL/min.
The intersection shows that the pilot air pressure is approx. 0.35MPa.
4．Based on the air consumption graph, mark the point of pilot air pressure of 0.35MPa.
From this point, air consumption is approx. 10.5L/min[ANR].
粘度（ｍＰａ・ｓ）
Viscosity (mPa･s)
-Discharge pressure : 0.2MPa
－15－
-Viscosity : 15mPa･s