日本SMC流體閥VCA20-6A-1：VCA、VCB、VCL、VCS、VCW及VDW系列的工作介質比較單一，故閥的結構簡單，體積和重量都比對應口徑的VX系列要小而輕，價格也低些。.

VXR2系列是SMC防水錘型二位二通先導式電磁閥，在IN側沒有壓力或很低壓力下，由于提升彈簧的反力使主閥芯開啟，故稱為零差壓動作型，即Z低動作壓力差為零。.

日本SMC流體閥VCA20-6A-1：

SMC流體閥的工作介質

氣動元件的工作介質通常是壓縮空氣。SMC流體閥是指通過閥的工作介質除空氣（包括真空狀態）及氬氣、氮氣、氦氣等惰性氣體外，還可以是水、油、蒸汽等多種液體和氣體。當然，不同的系列允許通過的工作介質是不同的，請參見SMC 2、3通流體閥選型指南。

SMC流體閥幾種典型結構

下圖是VCW系列的結構原理圖。對于N.C.型，電磁線圈3不通電時，閥芯關閉IN口與OUT口。當電磁線圈通電時，動鐵心組件4a克服復位彈簧6的彈簧力，被靜鐵心2所被吸引，IN口與OUT開啟。N.C.型的圖形符號表示，在不通電時，IN口至OUT口是封閉的，但若OUT口與IN口對換，則不能封閉。

VCA21-4G-3-02	VCL31-4G-10-04-D	VCW41-1G-5-02-F	VX070-069-1
VCA21-4G-3-02-F	VCL31-4G-10-04-H	VCW41-1G-6-03-X51	VX070-069-2
VCA21-4G-5-02	VCL31-4G-10-04-N	VCW41-2G-10-04-L-F	VX2110-01-1D
VCA21-4G-5-02-F	VCL31-4G-3-02	VCW41-2G-5-03	VX2110-01-1D1
VCA21-5D-3-02	VCL31-4G-3-03	VCW41-2TL-5-03	VX2110-01-1D1-B
VCA21-5D-3-02-F	VCL31-4G-4-02	VCW41-3D-10-06	VX2110-01-1DZ-B
VCA21-5D-5-02	VCL31-4G-4-03	VCW41-3D-7-02-A	VX2110-01-1TZ-B
VCA21-5D-5-02F	VCL31-4G-4-03-D	VCW41-3DL-10-06	VX2110-01-2G1-B
VCA21-5D-5-02-F	VCL31-4G-5-02	VCW41-4C-10-04-G-F	VX2110-01-3D
VCA21-5DB-3-02-F	VCL31-4G-5-02-H	VCW41-4D-10-02-L-F	VX2110-01-3G1
VCA21-5DL-3-02	VCL31-4G-5-03	VCW41-4D-10-03-C	VX2110-01-4D
VCA21-5DL-3-02-F	VCL31-4G-5-03-F	VCW41-4D-10-03-F	VX2110-01-4D1
VCA21-5DL-5-02	VCL31-4G-7-02	VCW41-4D-10-03-L	VX2110-01-4DZ1
VCA21-5DL-5-02-F	VCL31-4G-7-02-H	VCW41-4D-10-04	VX2110-01-4G
VCA21-5DLB-3-02	VCL31-4G-7-03-D	VCW41-4D-10-04G	VX2110-01-4G1
VCA21-5G-3-02	VCL31-4G-7-03-H	VCW41-4D-10-04-G	VX2110-01-4G-B
VCA21-5G-3-02F	VCL31-5D-10-03	VCW41-4D-10-04-L-F	VX2110-01-5C1-B
VCA21-5G-3-02-F	VCL31-5D-10-04	VCW41-4D-10-06	VX2110-01-5D
VCA21-5G-3-02N-F	VCL31-5D-10-04-F	VCW41-4D-10-06-H	VX2110-01-5D1
VCA21-5G-5-02	VCL31-5D-3-02	VCW41-4D-10-06-K	VX2110-01-5D-B
VCA21-5G-5-02-F	VCL31-5D-4-02	VCW41-4D-10-06-L	VX2110-01-5DZ
VCA21-5GB-3-02	VCL31-5D-4-02-H-F	VCW41-4D-3-03-G	VX2110-01-5DZ1
VCA21-5GB-5-02	VCL31-5D-5-03	VCW41-4D-4-03	VX2110-01-5DZ1-B
VCA21-5T-3-02	VCL31-5D-7-02	VCW41-4D-5-02	VX2110-01-5DZ-B
VCA21-6G-3-02	VCL31-5D-7-03-F	VCW41-4D-5-03	VX2110-01-5DZ-B-X21
VCA21-6G-5-02-F	VCL31-5DL-5-03	VCW41-4D-5-03F	VX2110-01-5G
VCA21-8D-3-02-F	VCL31-5G-10-03	VCW41-4D-7-03	VX2110-01-5G1
VCA21-9D-3-02-F(AC48V)	VCL31-5G-10-04	VCW41-4G-10-04	VX2110-01-5G-B
VCA21A-2D-3-02	VCL31-5G-10-04-F	VCW41-4G-10-04-C	VX2110-01-6G
VCA21A-3D-5-02	VCL31-5G-3-03	VCW41-4G-10-06	VX2110-01-6G-B
VCA21A-3DL-5-02	VCL31-5G-4-02	VCW41-4G-10-06-G	VX2110-02-1G
VCA21A-3G-5-02	VCL31-5G-4-03	VCW41-4G-10-06-K	VX2110-02-3G
VCA21A-4D-3-02	VCL31-5G-5-03	VCW41-4G-10-06-L	VX2110-02-4T1
VCA21A-4D-3-02-F	VCL31-5G-7-02	VCW41-4G-3-02	VX2110-02-5D
VCA21A-4D-5-02	VCL31-5G-7-03	VCW41-4G-3-02-H	VX2110-02-5D-B
VCA21A-4D-5-02F	VCL31-5G-7-03-F	VCW41-4G-3-03	VX2110-02-5DZ1