DSTD108P

DSTD108P

DSTD108P

：祖巧丽

：

1. 可靠性高，抗*力强

    工业生产对控制设备的可靠性要求：

①平均故障间隔时间长

②故障修复时间（平均修复时间）短

任何电子设备产生的故障，通常为两种：

     ①偶发性故障。由于外界恶劣环境如电磁干扰、超高温、超低温、过电压、欠电压、振动等引起的故障。这类故障，只要不引起系统部件的损坏，一旦环境条件恢复正常，系统也随之恢复正常。但对PLC而言，受外界影响后，内部存储的信息可能被破坏。

     ②*性故障。由于元器件不可恢复的破坏而引起的故障。

如果能限制偶发性故障的发生条件，如果能使PLC在恶劣环境中不受影响或能把影响的后果限制在zui小范围，使PLC在恶劣条件消失后自动恢复正常，这样就能提高平均故障间隔时间；如果能在PLC上增加一些诊断措施和适当的保护手段，在*性故障出现时，能很快查出故障发生点，并将故障限制在局部，就能降低PLC的平均修复时间。为此，各PLC的生产厂商在硬件和软件方面采取了多种措施，使PLC除了本身具有较强的自诊断能力，能及时给出出错信息，停止运行等待修复外，还使PLC具有了很强的抗*力。

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ROVALVE 6 INCH 150 PSIG KNIFE GATE VALVE S20-B MSS

LADISH V218 1/2" CHECK VALVE V-5260-0607-05B

LADISH 1/2" 150 CHECK VALVE 8274-0714-05B

ASCO RED-HAT 3/8" 2W SOLENOID VALVE NIB OFSF8030G10 105009

PARKER 110-120V, 50/60Hz, 1/4", 10W, 2-WAY SOLENOID VALVE 73216BN2MT00 *NEW*

NORRIS 3" 200PSIG-CWP BUTTERFLY VALVE R1011-13AA-1A

FESTO 24VDC SOLENOID COIL MSSD-F-24-LED-M?12-SA 186579 *NEW*

PARKER 24VDC 6W 300 PSI 1/16" ORIFICE SOLENOID VALVE, 3121BBN1GV00RRT?1J1C2 *NEW*

CDK VALVE CVS2-50A-10-02H?S-3 NIB

EEP /PRODUCTS 500 PSI PRESSURE 3/8" VALVE 64250-220

VICKERS DIRECTIONAL VALVE CG5V 6FW D MUB6 11

ABZ 6" 200PSI CAST IRON BUTTERFLY VALVE W/ ACTUATOR SR 200 DA

VICKERS 5000PSI DIRECTIONAL CONTROL SOLENOID VALVE DG4V-3-2C-M-WL-?B-40

ASCO 3/4 INCH, 120V, 50/60Hz, 10.5W, SOLENOID VALVE 8030B83 *NEW*

HAM-LET 2000psi 1/4" BALL VALVE H-700-SS-L-1/4-?T-LD

JAMESBURY 4" VALVE QUADRA-POWR II ACTUATOR QP3C /M W/ PMV POSITIONER P-2000

REXROTH MANNESMANN CONTROL VALVE 3DREP 6 C-11/25A24NZ4M

NIBCO 1-1/4" BRONZE GLOBE VALVE T-276-AP

ASCO 1/2" NPT, 17.1W, FUEL GAS 5PSI, 3-PIN MALE, SOLENOID VALVE ZBX8214G0202137?9

NELES-JAMESBURY ACTUATOR ST-1200 W/ WAFER-SPHERE VALVE SIZE 12 815W-11-3600-MT

NACHI CHECK VALVE CA-G10-1-20

3" SS BALL VALVE 800 CF8M

PARKER CHECK VALVE VCL6F65A-20 *NEW*

ROSS VALVE BODY SERVICE KIT, 1678K77 *NEW*

APOLLO 600 WOG PSI 1-1/2" NPT BRONZE BALL VALVE, 70-107-P2741 *NEW*

PARKER PILOT VALVE D31VW1BA7570YF NEW

SWAGELOK 3/8" NPT 5000PSIG 100°F 2 WAY FLOW CONTROL VALVE SS-1RS8-SC11

300S 1000W BRASS GATE VALVE NO HANDLE 20139

MILWAUKEE 125 S.W.P 200 W.O.G 1/2" BRONZE VALVE 1148-1158 NNB

LADISH 1/2" GATE VALVE 150 C501517

NUMATICS 5/8" NPT 5-PORT PNEUMATIC VALVE, 33HLD5410000000 *NEW*

R-R&C 1975WOG@100°F 1/2" STEEL GATE VALVE CR-13 / F57-D

HONEYWELL SOLENOID VALVE 7C111P3 15 1SHF7

ITT ENGINEERED VALVES FABRI-VALVE 150CWP 10" KNIFE GATE VALVE C37S316

CU 1/4"CS 10000PSI STEM SHUT-OFF VALVE

1/4" 300 1000 BRASS CHECK VALVE

PARKER HYDRAULIC CONTROL VALVE RCBF1600S0A1AAA *NEW NO BOX*

MAC 24V 4.0W 20-120PSI SMALL 4 WAY AIR VALVE *NEW*

MAC VAC-120PSI, 24VDC, 5.4W, 1/8"NPT, SOLENOID VALVE 35A-SAC-DDAA-1B?A *NEW*

GREEN 3/4" BRASS LINE 3 WAY BALL VALVE

CONBRACO 5/8"NPT 1/2"NPT BRONZE VALVE 45-301

MAC 24V 4.0W 20-120PSI SMALL 4 WAY AIR VALVE *NEW*

MAC VAC-120PSI, 24VDC, 5.4W, 1/8"NPT, SOLENOID VALVE 35A-SAC-DDAA-1B?A *NEW*

GREEN 3/4" BRASS LINE 3 WAY BALL VALVE

CONBRACO 5/8"NPT 1/2"NPT BRONZE VALVE 45-301

VELAN SS316 CLASS 150 SIZE 6 KNIFE GATE VALVE L14-0320B-13BL

PARKER 115/120V 145 PSI 1/4" NPT SOLENOID VALVE, B551AB553C *NEW*

NUMATICS 100-120V, 50/60Hz, .290A, 1/2"NPT 554SA431K *NEW, SEALED*

FESTO 24VDC, 4.5W, 42VAC, 9/7VA, SOLENOID COIL MSFG-24/42-50/6?0-OD *NEW SEALED*

BIMBA FLOW CONTROL FCP2K *NEW*

SMC PNEUMATIC SOLENOID VALVE 3 PIECE ASSEMBLY VQ1171-5LB-C6