Body Size: 40, Thread: None (Rc: for Body Size 20, 30, 40, 50, 60; M5: for Body Size 10), Port Size: 04 (1/2), Option: w/o Bracket; w/o Auto Drain, Semi-Standard 1: R (Flow Direction Right to Left), Semi-Standard 2: Standard

Body Size: 40, Thread: None (Rc: for Body Size 20, 30, 40, 50, 60; M5: for Body Size 10), Port Size: 04 (1/2), Option: B (Bracket), Semi-Standard 1: 2R (2 + R), Semi-Standard 2: Standard

Body Size: 40, Thread: None (Rc: for Body Size 20, 30, 40, 50, 60; M5: for Body Size 10), Port Size: 04 (1/2), Option: BD (B + D), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Standard

Body Size: 40, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 04 (1/2), Option: Standard, Semi-Standard 1: Standard, Semi-Standard 2: R (Flow Direction: Right to Left)

Body Size: 40, Thread: N (NPT), Port Size: 04 (1/2), Option: G (For Sizes 10, 20, 30, 40 Round Type Pressure Gauge w/Limit Indicator; For For Size 10: Round Type Pressure Gauge w/o Limit Indicator ), Semi-Standard 1: Standard, Semi-Standard 2: WZ (W + Z)

Rated Flow Range: 40 (5 to 40 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 04 (1/2), Output Specification: J (OUT 1: Analog 1 to 5V; OUT 2: Analog 1 to 5V), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: F (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °F)

Body Size: 40, Thread: N (NPT), Port Size: 04 (1/2), Mounting: None, Semi-Standard, Body Size 10: Z (Name Plate, Caution Plate for Bowl in Imperial Units: psi, °F), Semi-Standard, Body Size 20: Standard, Semi-Standard, Body Size 30, 40, 50 & 60: Standard

Size: 40, Thread Type: F (G), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: C [N.C.

Size: 40, Thread Type: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: w/o Auto Drain, Bowl: Sizes 20, 30, 40: Polycarbonate Bowl; Sizes 50, 60: Stainless Steel, Drain Port: w/Drain Cock, Indicator: L (w/Element Service indicator), Flow Direction: Left to Right, Drain Cock w/Barb Fitting: W (Drain Cock w/Barb Fitting), Pressure Unit: Z (Name Plate and Caution

Size: 40, Thread Type: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: w/o Auto Drain, Bowl: Sizes 20, 30, 40: Polycarbonate Bowl; Sizes 50, 60: Stainless Steel, Drain Port: w/Drain Cock, Indicator: w/o Indicator, Flow Direction: R (Right to Left), Drain Cock w/Barb Fitting: None, Pressure Unit: Z (Name Plate and Caution Plate for Bowl in Imperial Units

Size: 40, Thread Type: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: w/o Auto Drain, Bowl: Sizes 20, 30, 40: Polycarbonate Bowl; Sizes 50, 60: Stainless Steel, Drain Port: w/Drain Cock, Indicator: L (w/Element Service Indicator), Flow Direction: Left to Right, Drain Cock w/Barb Fitting: W (Drain Cock w/Barb Fitting), Pressure Unit: Z (Name Plate and Caution

Body Size: 40, Thread Type: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: w/o Auto Drain, Bowl: Sizes 20, 30, 40: Polycarbonate Bowl; Sizes 50, 60: Stainless Steel, Drain Port: w/Drain Cock, Indicator: L (w/Element Service Indicator), Flow Direction: Left to Right, Drain Cock w/Barb Fitting: W (Drain Cock w/Barb Fitting), Pressure Unit: Z (Name Plate

Series: AFD, Body Size: 40, Thread: N (NPT), Port Size: 04 (1/2), Mounting: Standard, Float Type Auto Drain: w/o Auto Drain, Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: J (Drain Guide 1/8: Body Size 20; Drain Guide 1/4: Body Size 30, 40), Indicator: without Indicator, Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Unit: Z (Pressure Unit

Rated Flow Range: 40 (5 to 40 L/min), Flow Adjustment Valve: S (w/Flow Adjustment Valve), Thread: F (G), Port Size: 04 (1/2), Output Specification/Temperature Sensor: F (Out 1: PNP; Out 2: Flow Rate: Analog 4 to 20 mA; Temp.: None; Temperature Sensor: None), Lead Wire: N (w/o Lead Wire and M8 Connector), Unit Specification: J (Instantaneous Flow: L/min, Accumulated Flow: L, Temperature: Â

Stations: 04 (4 Stations), Piping: B (U Side: Open; D Side: Open), Thread Type: N (NPT), Supply Unit Components: W (w/Flow Adj. Valve; w/Stop Valve), Return Unit Flow Switch: 7 (Integrated Display), Return Unit Flow Range: 40 (5 to 40 L/min), Return Unit Components: W (w/Flow Adj.

Body Size: 40, Pipe Thread: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Nominal Filtration Rating: 40 (40µ), Water Removal Type: S (Water Drop Removal Type), Semi-standard: Z (Name Plate And Caution Plate For Bowl In Imperial Unit (PSI, °F))

Size: 40, Thread Type: N (NPT), Port Size: 04 (1/2), Mounting: w/o Mounting Option, Float Type Auto Drain: C [N.C.

Stations: 04 (4 Stations), Piping: B (U Side: Open; D Side: Open), Thread Type: N (NPT), Supply Unit Components: P (w/o Flow Adj. Valve; w/Stop Valve), Return Unit Flow Switch: 7 (Integrated Display), Return Unit Flow Range: 40 (5 to 40 L/min), Return Unit Components: W (w/Flow Adj.

Rated Flow Range: 40 (5 to 40 L/min), Flow Adjustment Valve: w/o Flow Adjustment Valve, Thread: F (G), Port Size: 04 (1/2), Output Specification/Temperature Sensor: FT (Out 1: PNP; Out 2: Flow Rate: Analog 4 to 20 mA ⇔ Analog 4 to 20 mA; Temperature Sensor: Yes), Lead Wire: N (w/o Lead Wire and M8 Connector), Unit Specification: J (Instantaneous Flow: L/min, Accumulated Flow: L, Temperature

Angle Seat Valve /

Next, measure this flow rate at 80%, 60%, 40%, and 20%, as well as the upstream and downstream pressure. The sonic conductance C can be calculated based on this maximum flow rate. Substitute the data of the others into the subsonic flow formula to find b, and calculate the critical pressure ratio b from that average.