Yokogawa SB401-10

　分散控制系統(tǒng)(DCS)的主要作用是對(duì)生產(chǎn)過(guò)程進(jìn)行控制、監(jiān)視、管理和決策，因此必須具有很高的可靠性，才能保證工廠的安全、經(jīng)濟(jì)運(yùn)行。隨著大規(guī)模計(jì)算機(jī)系統(tǒng)和計(jì)算機(jī)通信網(wǎng)絡(luò)的不斷發(fā)展，可靠性問(wèn)題己經(jīng)成為一個(gè)十分重要的問(wèn)題，其理論也在這種形勢(shì)下不斷地發(fā)展和*?？煽啃约夹g(shù)的研究?jī)?nèi)容大致分為四個(gè)方面：可靠性設(shè)計(jì)、可靠性分析、可靠性試驗(yàn)、可靠性管理。

在DCS系統(tǒng)中，采用了許多提高可靠性的技術(shù)措施。這些技術(shù)措施是建立在以下四種基本思想上的：① 使系統(tǒng)本身不易發(fā)生故障，即所謂的故障預(yù)防;② 在系統(tǒng)發(fā)生故障時(shí)盡可能減少故障所造成的影響，即所謂的故障保安和故障弱化;③ 當(dāng)系統(tǒng)發(fā)生故障時(shí)，能夠讓系統(tǒng)繼續(xù)運(yùn)行，即所謂的故障容錯(cuò);④ 當(dāng)系統(tǒng)發(fā)生故障時(shí)，可以在不停止系統(tǒng)運(yùn)行的情況下進(jìn)行維修，即所謂的在線維修?；谶@四種基本思想，DCS系統(tǒng)中采用了各種各樣的可靠性措施降低事故的發(fā)生及所造成的損失。

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PARKER 06R113AC PNEUMATIC AIR REGULATOR ADJ. 1/4 NPT PORTS 250 PSI MAX. NOS

Parker 06F11AC 1/4" Pneumatic Filter w/ PS756P, 150PSI New, Old Stock

6 NEW PARKER 4M4A-C4L-5-B BALL VALVES

PARKER F07RS13AC REGULATOR NIB

PARKER 1-1/4" PNEUMATIC AIR FILTER 08F68AC MADE IN USA NEW

NEW PARKER N3356304553 120V-AC 3/4IN NPT INLINE SOLENOID VALVE D283294

NEW PARKER MKC-3 VALVE 7/8IN ID 240V-AC SOLENOID COIL B316941

PARKER SERIES 2MA 250 PSI PNEUMATIC CYLINDER 02.00 CJ2MAUS33AC 36.00 NNB

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NEW PARKER FILTER REGULATOR 06E21A13AC 3/8" NPT 150 PSI

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Parker 1/4" Filter 06F18AC NEW IN BOX

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PARKER 3/8" REGULATOR 250 PSI 07R211AC

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Parker F07R313AC Regulator Pmax = 250PSI Tmax = 175 F

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Parker 06R313AC Pneumatic Regulator 250 psi 1/2"

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Parker 06R213AC, Air Line Regulator

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Parker 8A-C8L-1/3-T-SS C-Series Check Valve

Parker 6A-C6L-5-EPR-88 Check Valve

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PARKER FILTER 06F22AC

NEW PARKER PNEUMATIC CYLINDER 02.00 CJMAUS19AC 1.00 200PSI MAX

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Parker 06R111AC Air Regulator 250PSI 175F

Parker 06F11AC 1/4" Pneumatic Filter 250PSI NOS

3 each Parker 4A-C4L-1-BN-SS / C-Series Check Valve 1-PSIG

PARKER (06R213AC) 3/8" 250PSI REGULATOR // NEW in BOX /

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(NEW) Parker ( 07R213AC ) Pneumatic Pressure Regulator 3/8" NPT Max PSI 250

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PARKER FILTER 06F22AC

S.A.C 5ft MATCH BEACH TRIPOD( PARKER)

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Parker 2MA 02.50 CBE2MAU39AC 7.000 Pneumatic Cylinder

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Parker 06E24A18AC - Filter-Regulator 3/8" NPT Range 2-125 PSI, 250 PSI Max.

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NEW PARKER 06F13AC 250PSI 1/4 IN NPT PNEUMATIC FILTER B349819

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PARKER 2A-C2L-1/3-BN-B CHECK VALVE C SERIES 1/8" INLET/OUTLET

Parker, General Purpose Valve 08F23C2140A-C

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Parker Pneumatic Filter 06F18AC 1/4" NPT 250 PSI 1700 kPa 175oF New

NEW MAZDA / PARKER Air Conditioning A/C Drier Receiver 85-0122

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NEW PARKER B3C00022 B3M200PLTX 115V-AC SOLENOID VALVE D375176

PARKER 01.50 CJMAU14AC SERIES MA

PARKER 01.50 CTB2MAU14AC 4.000

Parker Air Series 2AN Cylinder 01.50 CJ2ANR19AC 3.000

Motorhome RV Universal Make Male Insert Oring A/C Receiver Drier

NEW PARKER B3C00022 B3M200PLTX 115V-AC SOLENOID VALVE D376444

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PARKER A/C DRIER PH08833500

PARKER SERIES 2A 02.00 CJAUV14AC 1.000

PARKER PNEUMATIC CYLINDER 1 1/2" BORE 1" STROKE 01.50 CKJTC2HLT19A19AC 1.000

NEW PARKER 06R113AC 250PSI 1/4 IN PNEUMATIC REGULATOR B273021

NEW PARKER XM30NB553A 110/120V-AC 1/8IN NPT SOLENOID VALVE D275150

Motorhome RV Universal Make A/C Receiver Drier

Parker 2MA 02.00 CBE2MAUS19AC 8.000 Pneumatic Cylinder

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Parker A C Filter Dryer Receiver NEW 07-0095, For R12,R22,R134a,MP39,MP52

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NEW PARKER REGULATOR 3/8" X 5/8" NPT 07R213AC

Parker Series 2A Cylinder, Model: 01.50 C02AU14AC 5.00. New Old Stock. No Box

Parker Valve Solenoid On Indicator Kit 1301167-Y 120AC

Parker Filter Drier 1693117C1 A/C Drier 10" X 3" 11/16"F X 3/8"F New

PARKER, AIR CYLINDER, 1 1/2" BORE X 1" STROKE, 01.50 CJ2AU14AC 1.000

Parker Valve Solenoid On Indicator Kit 1301167-Y 120AC NIB

NEW 07F45AC PARKER LUBRICATOR (EB1)

11.5 FOOT STANDARD BARRIER PARKER A/C HOSE #8 !! 13/32" ID FITTINGS INCLUDED

Parker Pressure Regulator Valve 07R315AC Pmax = 250 psi (1700 kPa) Tmax=175F

NEW PARKER 71315SN1GN00 THREADED 120V-AC 1/16 IN NPT SOLENOID VALVE B250447

Parker 02.00 CD2MAU14AC9.000 Air Cylinder 250psi 2.000

PARKER COMPAIR Valve Series 5/9 ADC 240AC coils - Brand New

NEW PARKER S10LC COIL 120V-AC SOLENOID VALVE REPLACEMENT PART D385332

Parker 3/8 inch regulator 06r213ac

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PARKER 2A-C2L-1 -B CHECK VALVE C SERIES 1/8" INLET/OUTLET

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Parker Air Cylinder 01.50 CJ2ANR14AC 2.000 Series 2AN

PARKER REGULATOR 06R116AC1 NOS NIB

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(4) Steveco World Series WSL166S Parker Gemtech 163S 02203 A/C Liquid Line Drier

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(2) NEW PARKER CONNECTORS PESC2220B V+P 2M 24 AC/DC

Parker Pneumatic Cylinder 1.25DXPSRY01.0 AC-369 ER

PARKER Pneumatic Filter Particulate Pipe-Nippled Y Configured 1/4" Port |AC4|

PARKER A/C FILTER DRIER RECEIVER Hi-Capacity

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