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主营AB/ABB/GE/施耐德/本特利/ TRICONEX 巴赫曼/西屋/黑马 福克斯波罗 霍尼韦尔 等PLC 模块卡件
plc每完成一次循环操作所需的时间称为一个扫描周期。不同型号的plc，循环扫描周期在1微秒到几十微秒之间。程序计数器这样的循环操作，这是dcs所没有的。这也是使plc的冗余不如dcs的原因。dcs是在运算放大器的基础上得以发展的。把所有的函数和过程变量之间的关系都做能块（有的dcs系统称为膨化块）。dcs和plc的表现的主要差别是在开关量的逻辑解算和模拟量的运算上，即使后来两者相互有些渗透，但是还是有区别。80年代以后，plc除逻辑运算外，控制回路用的算法功能已经大大加强，但 plc用梯形图编程，模拟量的运算在编程时不太直观，编程比较麻烦。但在解算逻辑方面，表现出快速的优点，在微秒量级，解算1k逻辑程序不到1毫秒。它把所有的输入都当成开关量来处理，16位（也有32位的）为一个模拟量。
KUNKLE 6182HGV02-KM 137PSI 1-1/2 IN NPT BRONZE THREADED RELIEF VALVE D562969
CROSBY 972182FA N84177 150PSI 1IN NPT 70GPM THREADED RELIEF VALVE D523760
LESER 4411.4404 IRON FLANGED RELIEF VALVE 40X65MM 8BAR D556730
FARRIS 1855 95PSI 1-1/2 IN NPT 1362CFM STEEL THREADED RELIEF VALVE D564371
MERCER 81-17151V13G11 STEEL RELIEF VALVE 1751CFM 500PSI 1IN NPT D586314
WATER WELL PUMP PRESSURE RELIEF VALVE 210-01 TLRV 1IN X 3/4IN NPT D576764
HENRY 560A IRON THREADED RELIEF VALVE 150PSI 1/2X3/4IN FNPT D585369
HENRY 560A IRON THREADED RELIEF VALVE 150PSI 1/2X3/4IN FNPT D585361
KUNKLE 6182FE01 BRONZE THREADED RELIEF VALVE 45PSI 1IN NPT 349SCFM D585544
FARRIS 2745/S4 STAINLESS RELIEF VALVE 1/2 IN NPT 290PSI 22GPM D565279
CONSOLIDATED 1980C2 300PSI 1 IN NPT 145GPM STEEL RELIEF VALVE D563481
HYDROSEAL 1BV-30 STAINLESS RELIEF VALVE 1/2IN NPT 5.5GPM 250PSI D597648
LUKENHEIMER 1226C 110PSI 2 IN NPT 741CFM BRONZE RELIEF VALVE D544347
KUNKLE 337-H01 15PSI 2 IN NPT 903CFM THREADED RELIEF VALVE D551862
ANDERSON GREENWOOD 81PS1S8A12A-4 125PSI 16GPM 1IN FLANGED RELIEF VALVE D577800
WELLMARK W9501-RSB 1200 SAFETY RELIEF VALVE 1IN X 1IN 2421SCFM 900PSI D591035
HANSEN H56 1/2X3/4IN NPT 150PSI STEEL REFRIGERATION RELIEF VALVE D539913
PLAST-O-MATIC 3/4IN NPT PVC THREADED RELIEF VALVE D599614
J.E. LONERGAN LCT-14 STEEL RELIEF VALVE 322CFM 225PSI 3/4 X 1IN NPT D597629
SPENCE ENGINEERING 31GF BRONZE THREADED RELIEF VALVE 1-1/4IN NPT 100PSI D599492
HYDROSEAL 2CXV00-E 3150PSI 87GPM 3/8 X 1/2 IN NPT RELIEF VALVE D534022
KUNKLE 20-E01-MG 115PSI 1 IN NPT 38GPM BRONZE THREADED RELIEF VALVE D556852
NAKAKITA NS255 A-H 25X50MM 1 IN NPT 93KG/H 0.5KGF/CM2 RELIEF VALVE D539060
DRESSER 1543D-21 15PSI 1/2 IN 157LBS-HR STEEL THREADED RELIEF VALVE D552887
CROSBY 951400MA 1/2X1IN NPT 300PSI 456CFM STEEL RELIEF VALVE D564522
FARRIS 2745/S4 STAINLESS RELIEF VALVE 1/2 IN NPT 290PSI 404CFM D565281
KUNKLE 1-D01-LC 295LB/H 60PSI 3/4 IN NPT SAFETY RELIEF VALVE D554574
AQUATROL 69 150PSI 1/2 IN NPT 22GPM BRONZE THREADED RELIEF VALVE D559257
KUNKLE 20-E01-MG 15PSI 1 IN 14GPM NPT BRONZE THREADED RELIEF VALVE D558715
FULFLO VJF5R 1 IN STEEL FLANGED RELIEF VALVE D556322
GRIFFCO BPV050P BACK PRESSURE VALVE PVC 0-150PSI 50PSI 1/2 IN NPT D579308
MERCER 91-17D31V07I2 FLANGED RELIEF VALVE 1IN 60PSI D596608
CROSBY JR-U-CA RELIEF VALVE 18GPM 80PSI 1/2 X 1IN NPT D597652
CROSBY VALVE & GAGE JRS-A THREADED RELIEF VALVE 80PSI 1/2 X 1IN NPT D595642
CROSBY VALVE & GAGE JRSA THREADED RELIEF VALVE 150PSI 3/4 X 1IN NPT D596560
CONBRACO 11-701-21 100PSI 2 IN NPT 2414LB/HR BRONZE RELIEF VALVE D531147
FARRIS 1850 250PSI 1/2 IN NPT STEEL THREADED RELIEF VALVE D563806
FOSTER VI080BDO 10-28PSI 2 IN BRONZE THREADED RELIEF VALVE D563562
VIKING C-1 PRESSURE OPERATED RELIEF VALVE 1/2 IN NPT BRASS D569284
FISHER 298A-1 0.70 SPRING LOADED RELIEF VALVE 3-13PSI 1/4IN NPT D599436
LONERGAN L14B-C40-LS STEEL RELIEF VALVE 700PSI 1/2IN NPT D599794
FARRIS 1875-0L 30PSI 1/2 IN NPT RELIEF VALVE D567138
WATTS 1XL M6STD.Z21.22 150PSI 1/2IN NPT PRESSURE RELIEF VALVE D587869
CYRUS 803 STEEL RELIEF VALVE 246CFM 100PSI 1/2IN NPT D594755
CIRCLE SEAL P75-344 2440PSI 1/2 IN NPT BRASS RELIEF VALVE D561507
WATTS M3 174A 75PSI 3/4IN NPT BRONZE PRESSURE SAFETY RELIEF VALVE D594792
REGO PRV9434T CRYO-FLOW 375PSI 1/2 IN NPT BRASS RELIEF VALVE D567635
BELL & GOSSETT 4100 4100000 BTU/HR 30PSI 2 IN NPT IRON RELIEF VALVE D522943
WATTS M3 174A 150PSI 3/4 IN NPT BRASS THREADED RELIEF VALVE D567421
WL HAMILTON 1/2IN NPT 40PSI BRONZE THREADED RELIEF VALVE D552327
CASH ACME NCLX-5 TEMPERATURE PRESSURE 3/4 IN NPT RELIEF VALVE D562073
WATTS 100XL 150PSI 3/4 IN NPT BRASS RELIEF VALVE D562069
MANSFIELD 451 26662-005 PRESSURE RELIEF VALVE 75PSI 1/2 IN NPT BRASS D577178
LIMITORQUE SMB SIZE 4T 14.4HP 1900RPM L0218AR4 250V-DC VALVE ACTUATOR D555245
LIMITORQUE L120-190 4HP 575V-AC VALVE ACTUATOR D568990
LIMITORQUE SMB SIZE 2 8HP 3510RPM X0215 550V-AC VALVE ACTUATOR D555244
DODGE 132429 6 SLV RTL LINER ASSEMBLY BEARING D515854
DODGE 132594 SLEEVOIL 10XC LINER BEARING 10IN D497462
FLOWSERVE L120-190 LIMITORQUE DS204 250V-DC VALVE ACTUATOR D555272
LIMITORQUE SMA SIZE 3 4HP 250V-DC VALVE ACTUATOR D567728
ROSEMOUNT 3D39441G09 WORLD CLASS 3000 9FT ANALYZER HEATER PROBE D577132
LIMITORQUE SMA 550V-AC SIZE 1 VALVE ACTUATOR D568830
BECK 11--01 ELECTRONIC CONTROL DRIVE ACTUATOR 120V 1PH D584153
METSO P4610370 KAJAANI MCA MICROWAVE CONSISTENCY TRANSMITTER DISPLAY D594724
EL-O-MATIC PS4000.U0A14A.00K0 PNEUMATIC VALVE ACTUATOR D597213
AUMA SA 10.1-FA10 GZ 25.1 GS250 ELECTRIC VALVE ACTUATOR D560956
AUMA SA07.5 GS200.3/GZ200.3 AD63-2/80 864:1 ELECTRIC ACTUATOR D562557
SIEMENS 6DR52100EN000AA0 VALVE POSITIONER D553034
FLOWSERVE L120-40 LIMITORQUE 1HP VALVE ACTUATOR D555066
DODGE 132954 SLEEVOIL BEARING LINER ASSEMBLY 4-15/16IN D521952
ROTORK SM-5120-N-1-48/300-90 VALVE DAMPER ROTARY ACTUATOR D538452
SIEMENS 6DR5215-0EN00-0AA0 SIPART PS2 ELECTRO-PNEUMATIC POSITIONER D554224
LIMITORQUE L120-40 1.8HP 1900RPM MSG0056Y 250V-DC VALVE ACTUATOR D555275
SIEMENS P1051AD 5-7/8IN ID PUMP STEEL BUSHING D511529
SIEMENS 6DR5215-0EN00-0AA0 SIPART PS2 ELECTRO-PNEUMATIC POSITIONER D554223
ROOTS DRESSER RK10AVBOO 10IN ROTARY LOBE BLOWER REPAIR KIT D583917
FLOWSERVE CSCPX1750EAXVS STAINLESS PUMP SEAL CARTRIDGE 1.75IN D561308
ROTORK 40AFA25A 575V-AC 3PH 5.9HP 500LB-FT ELECTRIC VALVE ACTUATOR D565521
EIM MDF3-4 M2CP 2000 ROTORY VALVE ACTUATOR CONTROLLER ASSEMBLY D566173
ROSEMOUNT 4847B61G04 OXYMITTER 4000 ANSI 6FT CELL REPLACEMENT KIT D592368
VALVCON LVWX2500KS2N115AC JAMESBURY VALVE ACTUATOR 115V-AC D554431
JOHN CRANE 1-82982 T1648LP TYPE 1648LP 3-1/4IN STAINLESS PUMP SEAL D528859
MOYNO SS A2D5020 15-1/4IN STAINLESS PUMP ROTOR D595422
EL-O-MATIC EL-2500 ELECTRIC ROTARY VALVE ACTUATOR D594705
SIEMENS 6DR5110-0NN01-0AA3 SIPART PS2 SMART VALVE POSITIONER D583320
SIEMENS 6DR5110-0NN01-0AA3 SIPART PS2 SMART VALVE POSITIONER D583495
JORDAN CONTROLS ROTORK SM-1730-D-1-12/1200-90 ROTARY ACTUATOR 120V D569894
EL-O-MATIC PD4000.U0A00A.00K0 PNEUMATIC VALVE ACTUATOR 116PSI D594763
JORDAN CONTROLS ROTORK SM-1730-D-1-12/1200-90 ROTARY ACTUATOR 120V D569896
SIEMENS 6DR5210-0EN01-0AA3 SIPART PS2 SMART VALVE POSITIONER D583322
ROTORK A14 0.6HP 575V-AC 120LB-FT 3PH VALVE ACTUATOR D565866
EL-O-MATIC PS2500.U0A14A.00K0 PNEUMATIC VALVE ACTUATOR 116PSI D594769
GOULDS RC04051A 1012 13IN TAPER BORE IRON STUFFING BOX COVER D579941
METSO NP704/B1S1A NELES PNEUMATIC VALVE POSITIONER D553381
EIM Q7N2-6 M2CP 2000 ROTORY VALVE ACTUATOR CONTROLLER ASSEMBLY D566468
PUMP IMPELLER 25IN OD 3IN THREADED ID 4 VANE D566179
ABB V0001 TZIDC ELECTRO PNEUMATIC VALVE POSITIONER D597872
SIEMENS 6DR5210-0EN01-0AA3 SIPART PS2 SMART VALVE POSITIONER D583326
WEIR 38777 31IN OD 14-1/8IN EYE SLURRY PUMP IMPELLER 4-VANE D563691
FLOWSERVE 120CHTA59AX5 R-655-3 STEEL BALANCE SLEEVE D568833
DODGE 132225 SLEEVOIL SIZE 8 RT THRUST PLATE KIT D559923
WEIR DAM005XLM BEARING CARTRIDGE ASSEMBLY SLURRY CENTRIFUGAL PUMP D598798
HONEYWELL 0102660-1-0000-00001000-00 120V-AC ACTUATOR D514336
WEIR 59111 31IN OD 12IN EYE SLURRY PUMP IMPELLER 4-VANE D580528
FLOWSERVE GEB422246DB-C JS STAINLESS SPLIT PUMP SEAL D569456
EIM 9H5753FC-C 1/4HP 575V-AC 3PH ELECTRIC VALVE ACTUATOR D579678
SIEMENS 6DR5210-0EN00-0AA3 SIPART PS2 HART VALVE POSITIONER D566823
FLOWSERVE RG316SR7SN0GE00 AUTOMAX PNEUMATIC VALVE ACTUATOR D580127
SUDMO D630 2141403 SANITARY DOUBLE SEAT STAINLESS VALVE ACTUATOR D568754
MASONEILAN DRESSER SVI2-21123121 DIGITAL VALVE POSITIONER D583853
ATLAS COPCO 2906-0298-00 AIR COMPRESSOR SERVICE KIT D552484
NELES JAMESBURY QPX4C/K40 QUADRA-POWR X VALVE ACTUATOR D553767
DEZURIK 425939T CONSISTENCY TRANSMITTER PIPELINE MODULE D585020
GOULDS RC04113A011216 CD4MCU 10IN TAPER BORE STUFFING BOX COVER D567031
STURM 0M0 6 VANE 23 IN OD 4-1/4 IN ID BRASS PUMP
