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What is the difference between ANA1, ANB1, and AN□02 series silencers?

AN□02 series: It features 35 dB(A) noise reduction, and uses flame-resistant material (equivalent to UL-94 standard V-O) for the main body. Only 1/4, 3/8, and 1/2 port sizes are available.
(Reference 1) Standard AN series compact resin type silencer: 30 dB(A) noise reduction

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://smccatalog.partbuilder.smcpneumatics.com/support/faq/en-jp/?ca_id=silencers-pressure-gauges&fa_id=10447

AC20B-N02-V1-CZ-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-V1-CZ-A

AC20B-N02-V1-Z-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-V1-Z-A

AC30B-N02-V1-Z-A

Body Size: 30, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC30B-N02-V1-Z-A

AC20B-N02C-V1-Z-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: C (N.C. Float Type Auto Drain), Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02C-V1-Z-A

AC30B-N02CG-V1-Z-A

Body Size: 30, Thread: N (NPT), Port Size: 02 (1/4), Option: CG (C + G), Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC30B-N02CG-V1-Z-A

AC30B-N02C-V1-Z-A

Body Size: 30, Thread: N (NPT), Port Size: 02 (1/4), Option: C (N.C. Float Type Auto Drain), Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC30B-N02C-V1-Z-A

AC20B-N02-SV-Z-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: SV (S + V), Semi-Standard 1: Standard, Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-SV-Z-A

AC20B-02-V1-C-A

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-02-V1-C-A

AC40B-N02-V1-2Z-A

Body Size: 40, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC40B-N02-V1-2Z-A

AC20B-02CG-SV-C-A

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: CG (C + G), Attachment: SV (S + V), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-02CG-SV-C-A

AC20B-02C-SV-C-A

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: C (N.C. Float Type Auto Drain), Attachment: SV (S + V), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-02C-SV-C-A

AC20B-02-TV-C-A

Body Size: 20, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: Standard, Attachment: TV (T + V), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-02-TV-C-A

AC20B-N02-SV-CZ-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: SV (S + V), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-SV-CZ-A

AC20B-N02-TV-2JZ-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: TV (T + V), Semi-Standard 1: 2J (2 + J), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-TV-2JZ-A

AC20B-N02-TV-2Z-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: TV (T + V), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-TV-2Z-A

AC20B-N02-V1-2Z-A

Body Size: 20, Thread: N (NPT), Port Size: 02 (1/4), Option: Standard, Attachment: V1 (3-Port Valve for Residual Pressure Release; Mounting: V+AF+AR), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, Â°F)

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC20B-N02-V1-2Z-A

AC25B-02D-TV-A

Body Size: 25, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: D (N.O. Float Type Auto Drain), Attachment: TV (T + V), Semi-Standard 1: Standard, Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC25B-02D-TV-A

AC25B-02-SV-2-A

Body Size: 25, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: Standard, Attachment: SV (S + V), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC25B-02-SV-2-A

AC25B-02-SV-A

Body Size: 25, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 02 (1/4), Option: Standard, Attachment: SV (S + V), Semi-Standard 1: Standard, Semi-Standard 2: Standard

https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://partbuilder.smcpneumatics.com/product-search-results/AC25B-02-SV-A