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What is the difference between old AR10 to 60 and new and old AR-A and AR-B series regulators?

Features and the main differences/similarities of the refreshed AR10-A to AR40-A and AR20-B to AR60-B series are described below.

The features of AR-A series regulators are as follows. ① The flow rate characteristics (reduced pressure drop) have been improved. ② The product has been whitened. ③ A backflow function has been added.

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://smccatalog.partbuilder.smcpneumatics.com/support/faq/en-jp/?ca_id=combination-units&fa_id=10969

SMC AR20KP-060 o-ring ar20, AR MASS PRO

The modular design of the AR series connects with other SMC air preparation equipment.Modular type regulator, Optional embedded pressure gauge , Available with built-in backflow mechanism , Knob is made of ozone resistant rubber material (HNBR) , Improved relief sensitivity , 6 Sizes , Rc, NPT or G(PF) threads, O-RING AR20, AIRLINE EQUIPMENT, AR MASS PRO, 21, AR MASS PRO NO SIZE RATING

https://www.smcpneumatics.com/AR20KP-060.html

Modular Type Regulator Series AR

: Right to left Upward handle Applicable model AR20 to 60 AR20 to 60 AR20 to 60 AR20 to 60 Name plate and pressure gauge in imperial units (PSI, F) Name plate and pressure gauge in imperial units (PSI, F) When more than one specification is required, indicate in ascending alphanumeric order.

https://www.smcpneumatics.com/pdfs/ar_series_filter_regulators.pdf

AR20-N02E-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 02 (1/4), Options: E (Square Embedded Type Pressure Gauge, w/Limit Indicator), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N02E-Z-D

AR20-01-1-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 01 (1/8), Options: w/o Mounting Option, Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-01-1-D

AR20-02-1-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 02 (1/4), Options: w/o Mounting Option, Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-02-1-D

AR20-02E-1-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 02 (1/4), Options: E (Square Embedded Type Pressure Gauge, w/Limit Indicator), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-02E-1-D

AR20-N01-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: w/o Mounting Option, Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01-1Z-D

AR20-N01BE-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: BE (B+E), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01BE-1Z-D

AR20-N01BE-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: BE (B+E), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01BE-Z-D

AR20-N01B-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: B (w/Bracket), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01B-Z-D

AR20-N01E-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: E (Square Embedded Type Pressure Gauge, w/Limit Indicator), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01E-1Z-D

AR20-N01EH-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: EH (E+H), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01EH-Z-D

AR20-N01E-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: E (Square Embedded Type Pressure Gauge, w/Limit Indicator), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01E-Z-D

AR20-N01H-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: H (w/Set Nut, for Panel Mount), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01H-1Z-D

AR20-N01H-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: H (w/Set Nut, for Panel Mount), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01H-Z-D

AR20-N01-Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: w/o Mounting Option, Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N01-Z-D

AR20-N02-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 02 (1/4), Options: w/o Mounting Option, Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N02-1Z-D

AR20-N02B-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 02 (1/4), Options: B (w/Bracket), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N02B-1Z-D

AR20-N02BE-1Z-D

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 02 (1/4), Options: BE (B+E), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AR20-N02BE-1Z-D