This is a legacy product, and replaced byAW40K-F04D-8-B, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, FA, AW MASS PRO 1/2 MODULAR (PT), 2.20462 lb
guardRegulator constructionMass (kg)Filter regulatorLubricatorAC40AAW40AL401/4, 3/8, 1/21/4Air?
Body Size: 40, Thread: F (G), Port Size: 04 (1/2), Option: D (N.O., Float Type Auto Drain), Semi-Standard 1: 8 (Metal Bowl w/Level Gauge), Semi-Standard 2: Standard
Type: -, Connection Method: -, Compressed Air Quality: General Dry Air, Connection Type: [G] G, Plumbing Thread Nominal: 1/2, Filtration Level: 5μm, Operating Environment: Standard, Operating Pressure Range(MPa): -, Flow Direction: [Right] From Left to Right, Drain Cock: [Auto Float Type] N.O. Automatic Drain, Bowl Material: [Metal with Level Gauge] Metal Case with Level Gauge, Bowl Guard
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Series: AF, Body Size: 40, Thread: F (G), Port Size: 04 (1/2), Mounting: Standard, Float Type Auto Drain: D [N.O. (Normally Opened)], Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: w/Drain Cock, Indicator: without Indicator, Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
Series: AF, Body Size: 40, Thread: G, Port Size: 1/2, Mounting: Standard, Float Type Auto Drain: D [N.O. (Normally Opened)], Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: w/Drain Cock, Indicator: without Indicator, Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
The refreshed AF series with 2 digits and an “A” suffix (AF40-□□-A) was released in April 2012. And the new design AF series with 2 digits and a “D” suffix (AF40-□□-D) was released in October 2019. 
Series: AF, Body Size: 40, Thread: F (G), Port Size: 04 (1/2), Mounting: Standard, Float Type Auto Drain: D [N.O. (Normally Opened)], Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: w/Drain Cock, Indicator: without Indicator, Flow Direction: R (Right to Left), Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
Series: AF, Body Size: 40, Thread: G, Port Size: 1/2, Mounting: Standard, Float Type Auto Drain: D [N.O. (Normally Opened)], Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: w/Drain Cock, Indicator: without Indicator, Flow Direction: Right to Left, Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
Series: AF, Body Size: 40, Thread: F (G), 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: w/Drain Cock, Indicator: without Indicator, Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
Series: AF, Body Size: 40, Thread: G, Port Size: 1/2, Mounting: Standard, Float Type Auto Drain: w/o Auto Drain, Bowl Type: Standard (Polycarbonate Bowl ), Bowl Guard: None, Drain Port: w/Drain Cock, Indicator: without Indicator, Flow Direction: Left to Right, Drain Cock w/Barb Fitting: None, Pressure Unit: Pressure Unit: MPa; Temp Unit: °C
This is a legacy product, and replaced byAFM40-F04D-A, MIST SEPARATOR, MODULAR, AIRLINE EQUIPMENT, AFM MASS PRO, FA, AFM 1/2INCH MODULAR (PT), 2.15272 lb
This is a legacy product, and replaced byAF40-F04D-A, FILTER, MODULAR, AIRLINE EQUIPMENT, AF MASS PRO, FA, AF MASS PRO 1/2 MODULAR (PT), 1.44634 lb
This is a legacy product, and replaced byAMG350C-F04D, DRYER, AMBIENT, AIRLINE EQUIPMENT, AMG AMBIENT DRYER, F7, AMG 1/2INCH EUROPEAN, 2.20462 lb
This is a legacy product, and replaced byAW40-F04D-2-B, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, FA, AW MASS PRO 1/2 MODULAR (PT), 2.01564 lb
This is a legacy product, and replaced byAW40-F04D-B, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, FA, AW MASS PRO 1/2 MODULAR (PT), 2.076 lb
This is a legacy product, and replaced byAFD40-F04D-A, MICRO MIST SEPARATOR MODULAR, AIRLINE EQUIPMENT, AFD MASS PRO, FA, AFD MASS PRO 1/2 MODULAR (PT), 1.27266 lb
In addition, the element part numbers of the models with 2 digits (e.g., AF40) and the element part numbers of the models with 2 digits and a letter suffix (e.g., AF40-□-A) are the same and interchangeable.
Note that elements of old AF, AFM, AFD, and AW series products with 3 digits (e.g., AF400) are not interchangeable.