Item Classification pD(Torrcm) /D (Knudsen number) >0.5 <0.01 Viscous flow 0.5 to 0.015 0.01 to 0.3 Intermediate flow <0.015 >0.3 Molecular flow 8 Exhaust time (low/medium vacuum) 4 5 1 2 3 4 1 2 3 The time (gt) required to exhaust a chamber at low vacuum with volume V (l), from pressure P1 to P2, using a pump with pumping speed S (l/sec) is gt=2.3(V/S)log(P1/P2).
(P1 P2) : Upstream pressure (MPa) : Downstream pressure (MPa) : Effective area (mm) : Cv factor Q P P1 P2 S Cv 9
Pressure Momentary change P1 P2 Set value Anti-chattering function Devices such as large bore cylinders and high-flow vacuum ejectors consume a large volume of air when they operate, and this may cause a momentary drop in the primary pressure.
Normal primary pressure Drop of primary pressure Increase of primary pressure Pressure P1 P2 Time Switch output 1, 2 ON OFF The correction value is not stored on the EEPROM. When auto shift is used: When the primary pressure changes, set the auto shift function to Lo.
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
3 kPa)1 l/min (ANR) or less (at P2 = 0.4 MPa)0.6 l/min (ANR) or less (at P2 = 0.2 MPa)1.4 l/min (ANR) or less (at P2 = 0.6 MPa)1/4?5 to 60C (No freezing)?5 to 50C (No freezing)Bleed type0.5
Q=240S P(P1+0.100) Subsonic flow when (P2+0.100)/ (P1+0.100)>0.5 Sonic flow when (P2+0.100)/ (P1+0.100)0.5 Q: Air flow ratedm 3 /min(ANR) Q=120S (P1+0.100) 2 ) P: Differential pressure P1P2MPa P1: Upstream pressureMPa P2: Downstream pressureMPa Correction for different air temperatures Multiply the flow rate calculated with the about formula by a coefficient from the table below.
Nil Without restrictor With restrictor S Digital flow switch ON/OFF valve Nil Without digital flow switch NPN open collector 1 output + Analog output (1 to 5 V) PNP open collector 1 output + Analog output (1 to 5 V) NPN open collector 2 outputs PNP open collector 2 outputs NPN open collector 1 output + Analog output (4 to 20 mA) PNP open collector 1 output + Analog output (4 to 20 mA) P1 P2
Port size Enclosure C4 C6 C8 C0 F0 F1 F2 F3 P1 P2 P3 L0 L1 L2 T1 T3 M1 M2 M3 Nil W Dust-protected Dust-tight, Water-jet-proof (IP65) With 4 One-touch fitting With 6 One-touch fitting With 8 One-touch fitting Without One-touch fitting (With clip) Without lead wire F kit for 2 to 12 stations/Double wiring F kit for 13 to 24 stations/Double wiring F kit for 2 to 24 stations/Single wiring P/J