1、电磁阀从原理上分为三大类：
直动式电磁阀
原理：通电时，电磁线圈产生电磁力把关闭件从阀座上提起，阀门打开；断电时，电磁力消失，弹簧把关闭件压在阀座上，阀门关闭。
特点：在真空、负压、零压时能正常工作，但通径一般不超过25mm。
分步直动式电磁阀
原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，阀门打开。当入口与出口达到启动压差时，通电后，电磁力先导小阀，主阀下腔压力上升，上腔压力下降，从而利用压差把主阀向上推开；断电时，先导阀利用弹簧力或介质压力推动关闭件，向下移动，使阀门关闭。
特点：在零压差或真空、高压时亦能可*动作，但功率较大，要求必须水平安装。
原理：通电时，电磁力把先导孔打开，上腔室压力迅速下降，在关 闭件周围形成上低下高的压差，流体压力推动关闭件向上移动，阀门打开；断电时，弹簧力把先导孔关闭，入口压力通过旁通孔迅速腔室在关阀件周围形成下低上高的压差，流体压力推动关闭件向下移动，关闭阀门。
特点：流体压力范围上限较高，可任意安装（需定制）但必须满足流体压差条件。
2、电磁阀从阀结构和材料上的不同与原理上的区别，分为六个分支小类：直动膜片结构、分步直动膜片结构、先导膜片结构、直动活塞结构、分步直动活塞结构、先导活塞结构。
贺德克二位三通电磁阀WK07L-01-C-V-24DG现货3056068;WSM06020Y-01-C-N-12DG;90;EUR
3056075;WSM06020Y-01-C-N-230AG;109
3056077;WSM06020Y-01-C-N-24DG;90;EUR
3230846;WSM12120YR-01-C-N-12DG;162
3230852;WSM12120YR-01-C-N-24DG;162
558860;WS08W-01-C-N-12DG;101
560231;WS08W-01M-C-N-0 without coil;84
3008246;WS08W-01-C-N-0 ohne Spule;73
3010181;WS08W-01-C-V-0 without coil;77
3011913;WS08W-01-C-N-24DG;101
3043358;WS08W-01-C-N-230AG;121
3126568;WS08W-30M-C-N-0 without coil;95
3132864;WS08W-30-C-N-24DG;112
3094657;WK10C-01-C-N-0 without coil;67
3094698;WK10C-01-C-V-0 without coil;72
3094699;WK10C-01M-C-N-0 without coil;110
3115602;WKM08130C-01-C-N-24DG;84
3115603;WKM08130C-01-C-N-230AG;104
3117597;WKM08130C-01-C-N-0 ohne Spule;57
3117639;WKM08130C-01-C-N-12DG;84
3117644;WKM08130C-01-C-V-0 ohne Spule;61
3117645;WKM08130C-01M-C-N-0 ohne Spule;98
3010193;WK08D-01-C-N-0 without coil;57
3010194;WK08D-01-C-V-0 without coil;61
3010195;WK08D-01M-C-N-0 without coil;98
6063118;4WE 6 D S01-24DG *;194
6063150;4WE 10 EA S01-12DG *;349
6063156;4WE 10 EA S01-24DG *;349
6063149;4WE 10 D S01-12DG *;349
6063155;4WE 10 D S01-24DG *;349
3038913;WK10G-01-C-N-24DG;210;EUR
3044464;WK10G-01-C-N-12DG;210;EUR
3044482;WK10G-01-C-N-230AG;247
3046161;WK10G-01-C-N-0 without coil;154
3046162;WK10G-01-C-V-0 without coil;159
3181538;WK10G-01M-C-N-0 without coil;213
3044407;WK10E-01-C-N-12DG;202
3044426;WK10E-01-C-N-230AG;240;EUR
3044428;WK10E-01-C-N-24DG;202
3046159;WK10E-01-C-N-0 without coil;147
3129360;PDB10P-01M-C-N-330-12PG-2.2;286
3129361;PDB10P-01M-C-N-500-12PG-2.2;286
3129362;PDB10P-01M-C-N-087-12PG-2.2;286
3129363;PDB10P-01M-C-N-330-24PG-8.8;286
3129364;PDB10P-01M-C-N-500-24PG-8.8;286
3129365;PDB10P-01M-C-N-087-24PG-8.8;286
3191373;PDB12P-01-C-N-330-0 WITHOUT COIL;257
3191374;PDB12P-01-C-N-500-0 WITHOUT COIL;257
3255568;PDB12P-01M-C-N-330-0 WITHOUT COIL;298
3255570;PDB12P-01M-C-N-500-0 WITHOUT COIL;298
3255571;PDB12P-01M-C-N-87-0 WITHOUT COIL;298
3436075;PDB16221PE-01-C-N-060-0 ohne Spule;427
3436078;PDB16221PE-01-C-N-060-12PG-2.2;472
3436079;PDB16221PE-01-C-N-060-24PG-8.8;472
3436080;PDB16221PE-01-C-N-230-0 ohne Spule;427
3111728;PDR08-01-C-N-200-12PG-2.2;173
3056429 FP161-1-N CAVITY PLUG
3056431 FP162-0-N CAVITY PLUG
3056432 FP162-0-V CAVITY PLUG
3056433 FP163-0-N CAVITY PLUG
3056434 FP163-0-V CAVITY PLUG
2127490 SB16A-300F7/342U-16 DN100 PN16
2127491 SB16A-375F7/342U-16 DN100 PN16
2127870 SAF20M12T210A-S63
2127871 SAF20M12T330A-S63
2128104 DICHTSATZ 3.8*125 PU/NBR
2128303 FPU-1-250F2,5G2A1K (FPS/FPK)
2128313 SBO210P-0,32E1/344U-160AI
2128360 FPU-1-400F2,5G4A3K
3011365 HRGBLPU 25 B1 142 ST MONT
3014029 HRGBLPU 25 PWTA CP-415/615 ST
3014052 RV10A-01-C-N-05
3014103 RV10A-01-C-N-15
3014841 KHM-38SR-3314-06X
3014997 PTK-250/2.0/M/FL053-E
3015057 HRL 5 B 42 AL ST M BL/ZNC
3015166 AUFNAHMEKOLBEN
3015255 HRS 2 S 22 AL ST M BL/ZNC
3015349 RV16A-01-C-N-05
3015350 RV16A-01-C-N-15
3015351 RV16A-01-C-N-30
3015352 RV16A-01-C-N-70
3015411 SR08-01-C-N-1.0V
3015412 SR08-01-C-N-1.8V
3015473 SR08-01-C-N-2.8V
3015474 SR08-01-C-N-4.8V
3015482 SR08-01-C-V-7.9V
3016418 SAF32E12Y2T315A-S309
3016438 FAM-30-M-2-A/2700-030-DM-02-S-Z-1
3016593 HRRL 3 KP 2X20 PP 92,5/2 M8 WZNR325
3016595 HRRL 3 KP 2X16 PP 92,5/2 M8 WZNR325
3016610 KFZP-1+2/2.3/P/71/10(PTFE)
3016611 KFZP-1+2/2.3/P/71/5(PTFE)
3016617 WK08X-01-C-N-0 WITHOUT COIL
3016618 WK08X-01-C-V-0 WITHOUT COIL
3016622 WK08P-01-C-N-0 WITHOUT COIL
3016647 WK08X-01M-C-N-0 WITHOUT COIL
3016670 DRV-08-18.1/0
3017053 KHB3K-G1-L-1112-06X-SO560
3017145 SD10-01-C-N-V
3017250 FAM-15-M-2-A/1900-015-DM-02-S-Z-1
3017251 FAM-50-M-2-A/3200-045-DM-02-S-Z-2
3017271 KHB-18LR-1114-16X-SO760
3017272 KHB-22LR-1114-16X-SO760
3018362 OLF-5/15-S-370-N-Z-BM
3018367 PTS-300/2.0/M/150/FL135
3018375 KHB-16-F6-11141-02X
3018376 KHB-16-F3-11141-02X
3018437 HRGKSM 0 R 44-46/47 ST
3018439 HRGKSM 0 R 47-50/50 ST
3018440 HRGKSM 0 R 51-54/55 ST
3018441 HRGKSM 0 R 55-58/59 ST
3018442 HRGKSM 0 R 58-61/62 ST
3018443 HRGKSM 0 R 66-69/69 ST
3018444 HRGKSM 0 R 70-73/73 ST
3018445 HRGKSM 0 R 77-80/80 ST
3018446 HRGKSM 0 R 81-84/85 ST
3018447 HRGKSM 0 R 85-88/89 ST
3018549 FAM-70-M-2-A/5100-075-DM-02-S-Z-1
3018569 WK08W-01-C-N-0 WITHOUT COIL
3018571 WK08W-01-C-V-0 WITHOUT COIL
3018585 WK08W-01-C-N-24DG
3018678 UEBERG-ST FPU G11-G5/8-ISO228 (BAUGR)
3018717 WK08W-01-C-N-12DG
3018966 SB400-20A1/112S-290A
3018967 SB400-32A1/112S-290A
3018968 SB400-50A1/112S-290A
3019159 KHB-G11/4-1112-06X-G-SW14
3019247 KHB-G1/2-1114-16X-SO760
3019298 HRD 1 A 200 PP ST
3019407 WS08W-01M-C-N-12DG
3019743 WS08Z-01-C-N-12DG
3019769 WS08Z-01-C-N-24DT
3019783 KHP3K-10-L-1114-14X
3019826 WS08Z-01M-C-N-24DG
3019925 WS08ZR-01M-C-N-24DG
3019937 OLF-5-E-Z-Z-Z-E
3019944 WS08Y-01-C-N-12DG
3020028 WS08YR-01-C-N-12DG
3020088 WS08YR-01M-C-V-24DG
3020127 WS08W-01M-C-N-12DL
3020150 WS08W-01M-C-N-24DL
3020206 WK08V-01-C-N-12DG
3020235 WK08V-01-C-N-24DG
3020375 WK08C-01-C-N-12DG
3020388 WK08C-01-C-N-24DG
3020407 WK08C-01M-C-N-12DG
3020454 WK08C-01M-C-N-24DL
3020470 WK08D-01-C-N-12DG
3020504 WK08D-01-C-N-24DG
