The refreshed AR series with 2 digits and a “B” suffix (AR40-□□-B) was released in May 2012. And the new design AR series with 2 digits and a “D” suffix (AR40-□□-D) was released in October 2019.

AR10-A: Rc1/16
AR20-A to AR40-A, AR20(K)-B to AR60(K)-B, and AR20(K)-D to AR40(K)-D: Rc1/8
Old AR10: Rc1/16
Old AR20(K) to AR30(K): Rc1/8
Old AR40(K) to AR60(K): Rc1/4
Old AR1000: Rc1/16
Old AR2000 to AR3000: Rc1/8
Old AR4000 to AR6000: Rc1/4

The AR20K-B to AR60K-B and the AR20K-D to AR40K-D are regulators with a backflow function.
For example, if you want to install a regulator between a valve and a cylinder, select a regulator with a backflow function for the smooth flow of the cylinder return side compressed air to the regulator.

The second refreshed AC series (2 digits and a “B” suffix: AC□□-□□-B) was released in May 2014. And the third refreshed AC series (2 digits and a “D” suffix: AC□□-□□-D) was released in October 2019.
The AC series catalogs can be found here.

The AR-A, AR-B, AR-D, and old AR** series operation manuals can be found here.

The AW-A, AW-B, AW-D, and old AW** series operation manuals can be found here.

LEC: 3 (3m), Controller Mounting: D (DIN Rail)

Size: 32, Motor Mounting Position: D (In-line Type), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 100mm, Motor Option: B (w/Lock), Rod End Thread: Female, Mounting: F (Rod Flange), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: 5 (5m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data Input Type), I/O Cable

Size: 32, Motor Mounting Position: D (In-line Type), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 150mm, Motor Option: B (w/Lock), Rod End Thread: Female, Mounting: Both Ends Tapped (Standard), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: 5 (5m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data Input Type

Size: 25, Motor Mounting Position: R (Right), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 200mm, Motor Option: C (w/Motor Cover), Rod End Thread: Female, Mounting: D (Double Clevis), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: B (15m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data Input Type), I/O Cable

Size: 40, Motor Mounting Position: D (In-line Type), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 250mm, Motor Option: C (w/Motor Cover), Rod End Thread: M (Male), Mounting: Both Ends Tapped (Standard), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: B (15m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data

LEC: 1 (1.5m), Controller Mounting: D (DIN Rail)

Size: 25, Motor Mounting Position: D (In-line Type), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 300mm, Motor Option: B (w/Lock), Rod End Thread: Female, Mounting: Both Ends Tapped (Standard), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: 3 (3m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data Input Type

Lock: None, Body Shape: D (Mounting Tap: 4xM10x1.5, Pin Hole: 2xø8H7), Mounting Surface: B (Same Side as Port Location), Bore Size: 50mm, Port Thread: TF (G), Guide Pin Diameter: 195 (19.5mm), Guide Pin Shape: D (Diamond Type), Clamp Arm Position: B (90° From Port), Clamping Height: L (Low Type), Shim: S (With 3mm Shims)

Lock: L (With Lock), Body Shape: D (Mounting Tap: 4xM10x1.5, Pin Hole: 2xø8H7), Mounting Surface: B (Same Side as Port Location), Bore Size: 50mm, Port Thread: Rc, Guide Pin Diameter: 195 (19.5mm), Guide Pin Shape: D (Diamond Type), Clamp Arm Position: B (90° From Port), Clamping Height: L (Low Type), Shim: S (With 3mm Shims)

Lock: L (With Lock), Body Shape: D (Mounting Tap: 4xM10x1.5, Pin Hole: 2xø8H7), Mounting Surface: B (Same Side as Port Location), Bore Size: 50mm, Port Thread: Rc, Guide Pin Diameter: 195 (19.5mm), Guide Pin Shape: D (Diamond Type), Clamp Arm Position: B (90° From Port), Clamping Height: L (Low Type), Shim: S (With 3mm Shims), Auto Switch: P79W--Reed, 2-color Indication, High Magnetic Field

Lock: L (With Lock), Body Shape: D (Mounting Tap: 4xM10x1.5, Pin Hole: 2xø8H7), Mounting Surface: B (Same Side as Port Location), Bore Size: 50mm, Port Thread: TF (G), Guide Pin Diameter: 250 (25.0mm), Guide Pin Shape: D (Diamond Type), Clamp Arm Position: B (90° From Port), Clamping Height: H (High Type), Shim: S (With 3mm Shims)

Lock: L (With Lock), Body Shape: D (Mounting Tap: 4xM10x1.5, Pin Hole: 2xø8H7), Mounting Surface: B (Same Side as Port Location), Bore Size: 50mm, Port Thread: TF (G), Guide Pin Diameter: 250 (25.0mm), Guide Pin Shape: D (Diamond Type), Clamp Arm Position: B (90° From Port), Clamping Height: H (High Type), Shim: S (With 3mm Shims), Auto Switch: P74--Reed, DC Volt, AC Volt, High Magnetic

Size: 16, Motor Mounting Position: D (In-line Type), Motor: Step Motor (Servo 24 VDC), Lead Screw: B (Size 16: 5mm, Size 25: 6mm, Size 32/40: 8mm), Stroke: 100mm, Motor Option: None, Rod End Thread: M (Male), Mounting: Both Ends Tapped (Standard), Actuator Cable: R (Robotic Flexible Cable), Actuator Cable Length: B (15m), Controller Type - LEC, JXC: 6P (LECA6, PNP, Step Data Input Type),

LEC: 5 (5m), Controller Mounting: D (DIN Rail)