12
Performance Curve
Selection from Flow Rate Characteristic Graph (PA(P)3313)
Required specification example: Find the pilot air pressure for a discharge rate of 6 L/min, a
discharge pressure of 0.25 MPa, and a cycle of 4 Hz. <The transfer fluid is fresh water (viscosity 1
mPa·s, specific gravity 1.0).>
If the total lifting height is required instead of the discharge pressure, a discharge pressure of 0.1
MPa corresponds to a total lift of 10 m.
Selection procedures:
1. First mark the intersection point for a discharge rate of 6 L/min and a discharge pressure of 0.25
MPa.
2. Find the pilot air pressure for the marked point. In this case, the point is between the discharge
curves (solid lines) for SUP = 0.4 MPa and SUP = 0.5 MPa, and based on the proportional
relationship to these lines, the pilot air pressure for this point is approximately 0.45 MPa.
Caution
1. These flow rate characteristics are for fresh water (viscosity 1 mPa·s, specific gravity 1.0).
2. Flow characteristic is measured based on necessary minimum piping.
3. The discharge rate differs greatly depending on properties (viscosity, specific gravity) of the fluid
being transferred and operating conditions (lifting range, transfer distance), etc.
1) Flow Rate Characteristics
