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WESTINGHOUSE 1C31224G01WESTINGHOUSE 1C31224G01

工控zui重要的*是穩定,第二是穩定,第三還是穩定,而穩定不單是硬件方面,軟件其實也非常重要,再有就是抗于擾。這里只談PLC軟件。 我把PLC程序規范為以下幾個組成部分： 
一、系統初始化， 
二、過程或狀態的描述(相當于繼電、接觸控制中的中間繼電器)， 
三、人機操作控制(手動操作，參數修改等)， 
四、設備控制輸出(電機、閥等)， 
五、通信(各控制設備間的互鎖和數據交換)、 
六、過程或狀態的故障描述， 
七、報警輸出和故障位置等信息顯示， 
八、生產過程報表(產、質量等)。 
手機

： 

 Qq:

鄭娟萍

廈門仲鑫航自動化設備有限公司

下面主要談談過程或狀態的描述和設備控制輸出，因為這基本上是程序的主要部分。
程序好壞的標準：穩定、易調試、易修改、易擴展、易讀、實時性(快)。在這么多年的實踐中，我感到先由過程或狀態的描述得到各種狀態變量，再對設備輸出進行編程能比較好的達到上述目標，可能它在快的方面有所欠缺(因為程序長一些)但這*可以從其它方面得到解決(例如中斷)。這種想法主要源自數學上的狀態方程：Q=f(S1，S2，S3……..,Sn)其中Q為設備輸出,S1、S2、S3…….Sn為狀態變量(包括輸入輸出)。f是由指令系統組成的算法。

PHOENIX CONTACT 1678826 WITH SPIN WELDER ENCODER 58000747

LEECRAFT 32 INDICATOR 125V 1/3W

BRYANT CONTROL BCI GP3 REV-A NIB

AMPHENOL AEROSPACE 5/8" O.D. CABLE CLAMP, 97-3057-1010 *NEW*

WIKA 1.5" 160 PSI 1/8" NPT 111.12 PRESSURE GAUGE, 4233395 *NEW*

GENERAL ELECTRIC BLACK RECESSED PUSH BUTTON CR104P *NEW*

US GAUGE 400 PSI, 1/4" NPT PRESSURE GAUGE 1424-0046 *NEW*

MARSH 1/2" NPT 0-100 PSI PRESSUE GAUGE 34693-3 ISS.C *NEW*

MARTIN BUSHING SH1 1/2 BORE NIB

NMB-MAT COOLING FAN 4715MS-23T-B30

AERO 8 CONTACT FEMALE CRIMP CONNECTOR, MS3476L12-8S *NEW*

FIREYE FLAME MONITOR EB-700 ENG CODE 04

TREGAKISS CLEANING STATION SERIAL# TT 5591

BUSS FUSE HOLDER J60030-3C NNB

BRAD HARRISON 600V 10A MINI-CHANGE CORDSET, 40903, NIB

MAHR / FEDERAL 0.01mm, MODEL VM DIGITAL INDICATOR 04792658-G-020A03A / IND-1025

TDK NOISE FILTER ZMB2203-13

PRX DUAL DARLINGTON TRANSISTOR MODULE, KD324515HB

HONEYWELL 120V 0.21A MODUTROL MOTOR, M644B1049

SIEMENS * TERMINAL BLOCK 1 LOT OF 3  * 8WA1 011 -2SF27

BRAD HARRISON 4-POLE 18/4AWG 10M MICRO-CHANGE CORDSET, 884032K03M100 *NEW*

MCDONNELL & MILLER 120-240VAC, 100PSI, 1/2"NPT FLOW SWITCH, FS1 *NEW*

DWYER INSTRUMENTS DPG-110 TRANSDUCER WITH DSIPLAY 0-3000PSI NNB

ACME T-2-53012-S GENERAL PURPOSE TRANSFORMER RNB

RED LION CONTROLS PRS1-1011 PLUG-IN SPEED SWITCH, NIB

HONEYWELL SKINNER COIL, 7C111B2141SHF3 *NEW*

STEARNS 230VAC 60HZ COIL, 6-3-62306-09

3M BLUE B ELECTRICAL SPRING CONNECTORS, *NEW LOT OF 24*

REES INC. 1" NPT LARGE SWITCH ENCLOSURE, 04938-100 *NEW*

BRIDGEPORT 231-DC2 EMT CONNECTOR, LOT OF 25, NIB

PEPPERL & FUCHS MOMENTARY LIGHTED PUSH BUTTON LMPB-A-D24  *NEW*

ITT NEO-DYN PRESSURE SWITCH 115P1C3-67 NNB

ASHCROFT TYPE 200 1/2" NPT DIAPHRAGM SEAL W/ TRERICE 0-60 PSI GAUGE, C1018 *NEW*

GENERAL ELECTRIC 440VAC 50/60HZ CAPACITOR, Z97F5304 *NEW*

INDUSTRIAL SOLID STATE CONTROLS 115V 50/60 HZ TIMER BUL.1014

SIEMENS POWERS 30 PSI 160?°F 1/8" NPT SWITCHING RELAY, 243-0001

LINCOLN ELECTRIC 1/16"-3/32" WIRE SIZE CONVERSION KIT, T-13724-B *NEW*

FEDERAL 0.01mm DIGITAL INDICATOR IND-1012

EAGLE SIGNAL CONTROLS TIMER HP50-133

URYU SEISAKU 9.6VDC BATTERY PACK, UB9986 *NEW*

CAMERON & BARKELY PROFIBUS STATION 8IN/4OUT 1C675PDM841A NIB

HONEYWELL MICRO SWITCH SENSING AND CONTROL 972AA3XM-A3P-L-050 NIB

CORCOM EMI FILTER 6S1 6A 8103115/250V 50-60HZ

DANAHER CONTROLS 3/8 SHT FLG MT W/MKR SD MT DYNAPAR ENCODER 62540960121

GENERAL ELECTRIC 1.3-1.9A OVERLOAD RELAY, CR7G1WG SER. A, NIB

BALDOR SUPER E MOTOR VEM3538 W/ BOSTON GEAR CF7210ZB5GR0

INTERLINKBT BUS STOP 300V 9A 5-WIRE MALE RECEPTACLE, RSF 58-1M *NEW*

LOY THERMOCOUPLE PROBE

IFM EFECTOR200 PHOTOELECTRIC SENSOR OGP201 NIB

BRAD HARRISON 4P MALE 12" #18 PVC LEADS MICRO-CHANGE RECEPTACLE 80599-18 NIB

GENERAL ELECTRIC CONTACTOR CR305B0 SIZE 0 115V 60Hz OR 95V 50Hz

IDI 2152A5 LED INDICATING LAMP LOT OF 4 NNB

OMRON 100-120VAC 10 SEC. TIMER RELAY, H3Y-4, NIB

FESTO FLAT CYLINDER DZH-50-300-PPV-A

DYNASONICS * TRANSIT TIME FLOWMETER * DTFXL2-XN1-NN

HOFFMAN HOL-TITE OIL TIGHT HOLE SEAL FOR 30.5MM PUSHBUTTON HOLES, A-SPB *NEW*

BALLUFF 250V 6A LIMIT SWITCH, BNS 819-D04-R12-100-10-FD *NEW*

LOCK METALCHEK 9 MK II BG METAL DETECTOR HDS

EUROTHERM DRIVES PANEL METER GB055166U001

MARTIN 3/8" PITCH 1" WIDE BELTS 5/8" BORE TIMING PULLEY, 30L100 *NEW*

BOSTON GEAR 1725 RPM 1HP MOTOR, PM9100ATF-I

WIKA OIL FILLED GUAGE 0-1000PSI NNB

NEMIC-LAMBDA POWER SUPPLY LWT50H-522

GATES MULTI-SPEED BELT, 2430V319 *NEW*

VICKERS 115V 60HZ SOLENOID COIL, 361145

MARTIN SPROCKET 60BS15HT 1 1/8

SERVICE FIRST TEMPERATURE CONTROL SWITCH, SWT00647 *NEW*

DELPHI AIR METER AF10015 NIB

SETRA SYSTEMS 60HZ 117VAC ELECTRONIC MANOMETER MODEL 350B 104595

FLOW CONTROL VSC-538-06 OCS02951 NIB

TRERICE 50 TO 300 °F BIMETAL THERMOMETER 52-2237 *NEW*

GENERAL ELECTRIC 230-240/460-480V 1.0/.5A 56Y FRAME 1/12HP AC MOTOR, SK32FN3784

PSYTRONICS TRANSIENT VOLTAGE SURGE SUPPRESSOR P2401D SINGLE PHASE 240 VOLTS

SEW EURODRIVE BMG1 BRAKE HF10NM 440VAC

HEIDENHAIN CORP. 3/8"SHAFT DIA. ENCODER, ROD 529/2010.05000

STATIC O RING 200-1750 PSI 2500 RANGE PRESSURE SWITCH, 8N6-B45-NX-C1A-JJTTX6

INGERSOLL-RAND SINGLE CHANNEL METER 93817393

TURCK CORDSET, VB2-FSM 4.4/2WKC 4T-0.3/0.3/S622 *NEW*

LEVITON 125/250V 30A 3 POLE 3 WIRE LOCKING PLUG, 2661 *NEW*

CROUSE-HINDS TANDEM OUTLET BOX 1/2" FS17 3/4" FS27 NNB

CROUSE-HINDS CONDULET 2 INCH NPT MOGUL CONDUIT OUTLET BODY, BLB6 *NEW*

ALLEN BRADLEY 800FM-LMP44MN3RX12 SERIES B NIB

ELECTROCUBE 600V 1/2W 150 OHMS SINGLE-PHASE RC NETWORKS, RG1986-7 *NEW LOT OF 2*

ASHCROFT 2-1/2" DIA. 60 PSI 1/4" NPT PRESSURE GAUGE, 436-05

WOODHEAD BRAD HARRISON 250V 4A 4P 5M MICRO CHANGE CORDSET, 884030C02M050 *NEW*

COPLEY CONTROLS CORP CONNECTOR KIT 84-00046-000 REV. A NIB

STEARNS SPRING-SET DISC BRAKE 1-005-031-01-NF

HOFFMAN 8.00 X 3.25 X 2.75 PUSHBUTTON ENCLOSURE, E-3PB *NEW*

ALLEN BRADLEY OVERLOAD RELAY 592-BOV16 SER A

ILME 2-1/4" NPT CONNECTOR HOODS, 23780, NEW LOT OF 2

RED LION CONTROLS IMP20162 115/230 VAC APOLLO INLIGENT METER, NNB

EATON VICKERS 02-10255 C KIT 35V22 BLD LT NIB

THOMAS & BETTS 143 1" LOCKNUT, LOT OF 50, NIB

KAYDON REAL-SLIM BALL BEARING 52334001 0G2

DAYKIN 480V 2.1A 1PH 60HZ TRANSFORMER DISCONNECT, MDGTC-05

WESCHLER INSTRUMENTS 0-50 AC AMPERES METER, 606B926A19 *NEW*

SERVICE FIRST 440VAC 50/60HZ ROUND CAPACITOR, CPT01144 *NEW*

DORNER 130V 2.3A 1/3HP 2500 RPM GEAR MOTOR, 827-002

SQUARE D 60A 600VAC MAX DISCONNECT SWITCH CLASS 9422 TYPE TD-1 LR44199

PHOENIX CONTACT RELAY  120VAC 2949211 ISOLATION I/O 4KV EMG 12-REL/KSR-120/1

P&H HARNISCHFEGER * FIVE SPEED PUSH BUTTON  * 32Q876D3

RIETSCHOTEN 3/8" NPT THRUSTER, Z-75

ROSEMOUNT 45VDC 2000 PSI 1151 SMART PRESSURE TRANSMITTER, 1151DP3S52DF

REOTEMP PRESSURE GAUGE EN 837-1, AISI 316 TUBE AND SOCKET PSI

THOMAS & BETTS .250-.375 CABLE 3/4" HUB CONDUIT FITTINGS, 2271 *NEW LOT OF 8*

ROTANIUM-VISA CRIMP P38933 NYLON INSULATED BRAZED SEAM 12-10 AWG 600V NIB

SYRON SENSOR JUNCTION BOX W/ BAYONET STYLE CONNECTOR, DTC1400

ACTIVE Z8420PS 40 PIN LOT OF 2 NIB

TESTRON CORPORATION 5-PIN CONNECTOR SWITCH, MAA26991S *NEW*

MICRON CONTROL TRANSFORMERS  B500-208-1F SERIES 2 NNB

BANNER FIBER OPTIC CABLE ITA23S 17967 SET OF 2

PHOENIX CONTACT CONNECTOR SMKDSP 1, 5/2-5, 08 NIB SEALED

HONEYWELL BZ-3RS MICRO SWITCH, LOT OF 4, IN BOX

BRAD HARRISON MPIS MULTI-PORT INTERCONNECT SYSTEM, 702P601 *NEW*

BROWNING 242 COUPLING SIZE 2" BORE GRID-FLEX COUPLING,  CHGF242X2 *NEW*

OHMITE 300W 3.1 OHMS VITREOUS ENAMELED RESISTOR, 2516 *NEW*

ASHCROFT 160 PSI 1/4 IN. NPT BM PRESSURE GAUGE, 1008

MARTIN 17T,  3-1/16" BUSH BORE, SPROCKET 100SF17

ROSEMOUNT 45VDC 2000 PSI 1151 SMART PRESSURE TRANSMITTER, 1151DP4E52B3

IGB3012-BPKG/M/V4A/US-104

FESTO MSV-3 119 807 MVH-5/3G

SMC INA-11-426-N10 FILTER 1.0MPA 145PSI NEW

SQUARE D  COMPANY 8501 KP-12 2 POLE GENERAL PURPOSE RELAY NIB

EMECANIQUE ZB2-BE102 CONTACT BLOCK, LOT OF 9, IN BOX

TURCK 250V 4AMAX WKBE 3T-6/S600 NIB

B-LINE B200D 5/16" SQUARE WASHER LOT OF 50 NIB

MICRON IMPERVITRAN .025KVA 50/60HZ INDUSTRIAL CONTROL TRANSFORMER, B025BTZ13JK

TURCK PROXIMITY SENSOR Bi 4-M12-AP6X-H1141 NIB

LITHONIA LIGHTING 12 AWG 20A CONNECTORS, G123N, LOT OF 11

BROOKS MT 3810 VARIABLE AREA FLOWMETER TRANSMITTER 3810A11B1RAA1A1

TOKHEIM AUTOMATION FC-330

TRABON 24VDC SOLENOID COIL, 557225, NNB

OHMITE 300W 4.0 OHMS VITREOUS ENAMELED RESISTOR, 2517 *NEW*

OMRON 24VAC/DC CONTROL UNIT, D40B-J1

REDINGTON 115VAC 8W 7-DIGIT COUNTER, 2-1017 *NEW*

RIGID STEEL CLOSE NIPPLE CONDUIT PIPE 3/4"X4" NIB

1" NPT NUMATICS F50B-08A AIR FILTER NNB

EMECANIQUE OPERATING KEY, ZCK-Y071 *NEW*

TURCK KB 4T-1-SB 4T NIB

MOORE 42V 4-20MA 0-100 PSIG PRESSURE TRANSMITTER, 341GE1S2B1NNN13

BEI MOTION SYSTEM 3/8IN SHAFT ENCODER M25D-X-HSS360B3-XDL-X-E-C14-X-3

BEI 5-24VDC 3/8" SHAFT DIA. ENCODER, XH25D-SS-500-ABZC-7272-EM18

CONTROLOTRON SYSTEM 1010 MULTIFUNCTION ULTRASONIC FLOWMETER 1010FTN1

INFICON 250-505 VDEO16-X REGELVENTIL NIB

CONTROLOTRON SYSTEM 1010 MULTIFUNCTION ULTRASONIC FLOWMETER 1010FTN1

INFICON 250-505 VDEO16-X REGELVENTIL NIB

DWYER 25 PSIG 120F 0-2 INCHES OF WATER PHOTOHELIC PRESSURE SWITCH/GAUGE, 3002C*

MELCO TECHNOREX * 24V 0.16A FAN * MMF-08D24ES

BANNER CURRENT SENSOR CI3RC  *LOT OF 2*

EAGLE SIGNAL 0-10 MINUTE TIMER, NO PART NUMBER

STATEC TECHNOLOGIES 4-PIN COMMUNICATION UNIT, R850-R

ITT  METRIX F74000 ANNECY METER 92 06 9999 0189

STANDFAST CHP750 NITROGEN GAS CYLINDER

CROUSE-HINDS CONDUIT GANG BOX 1/2 FSC 12 3/4 FSC 22 NNB

BRAD HARRISON 5P MALE 12" #16 PVC LEADS MINI-CHANGE RESEPTACLE 41310 NIB

B-LINE JOINER B787-22

WESTINGHOUSE CIRCUIT BREAKER BAB3060H TYPE BA

TESTRON CORPORATION MAA26992S MULTI-PIN CONNECTOR, NEW

JOHNSON CONTROLS PENN ALL RANGE P70AA118

TPC WIRE & CABLE 3 POLE FEMALE PANEL MOUNT RECEPTACLE, 63302 *NEW*

BUSSMANN 600 VAC 30A DISCONNECT SWITCH, BDNF30MS1 *NEW*

VEEDER-ROOT 115VAC 6W 60HZ 6-DIGIT COUNTER, 744386-241 *NEW*

NIDEC 12VDC .22A FANS, TA225DC, NEW LOT OF 2

SIMPSON 2865 DIGITAL PANEL METER 200mA AC 105-130V AC, 50-400Hz 6VA

AGASTAT 120V 60HZ .5-5 SECOND TIMING RELAY W/O TIMING KNOB, 7022AB

PHOENIX CONTACT 3.81MM 6-POS TERMINAL BLOCKS, MCVR 1.5/6-ST-3.81, NIB LOT OF 34

NMB 230VAC 35/35W 1 PHASE THERMALLY PROTECTED COOLING FAN, 5915PC-23T-B30

CROUSE-HINDS 600V 10A 16AWG 10" LEAD MINI-LINE MALE RECEPTACLE, 5000110-18 *NEW*

GE FANUC 12 PT 115V AC OUTPUT MODULE A0A12F A03B-0807-C159

WHITMAN CONTROLS 250VAC 5A 5000 PSIG PRESSURE SWITCH, J205G-25S-K52L18-X

WESTLOCK CONTROL COPR. 120VAC 3A ACCUTRAK DUAL DISPLAY MONITOR 9044AN *NNB*

BRADY 1.50" MARKER LENGTH B-500 WIRE MARKER CARDS, WM-200-224 *NEW LOT OF 25*

OMRON 100VAC TRANSMITTER K3FK-PRU-21-B

ROSS W6476D2307 SINGLE-SPINDLE POPPET VALVE, NO BOX

TURK CONNECTOR KIT B 8145-0 NIB 1 LOT OF 2

BAR 100XkPa 200-BDD 1/4NPT CBM NIB

EMECANIQUE XALB164H29 PUSH BUTTON CONTROL STATION, NIB

ASHCROFT 160 PSI 1/4 IN. NPT LM PRESSURE GAUGE, 1008

FESTO 24V 4-PIN 90 DEGREE ANGLE CONNECTOR, 18527 *NEW*

TPC WIRE & CABLE 5 PIN 89500 AH6P NNB

GLOBESTRUT 2 HOLE ADJUSTABLE CORNER ANGLE LOT OF 15 NIB

TAYMAC GANG-VERTICAL MOUNT FOR ONE DUPLEX RECEPTACLE, 10310, NIB

FESTO MUHX2-ZP-D-1-24G MANIFOLD NIB

AUTOMATIC DIRECT RELAY SOCKET 784-4C-SKT-1  (LOT OF 4)

PHOENIX CONTACT TERMINAL BLOCKS, TYPE USIG, NIB LOT OF 41

TURCK BIM-IKE-AP6X-V1131 AND KLi3 - 1 EACH

SERVICE FIRST 480/600V 50/60HZ TRANSFORMER, TRR00579 *NEW*

BRAD HARRISON 40908 MINI-CHANGE RECEPTACLE, LOT OF 2, NEW IN BAG

PAPST EBM * 115V 50/60HZ 18/17W FAN * W2K121-AA15-01

AMP 2-87631-0 FEMALE SOCKET CONNECTORS 0625 LOT OF 104

PRX POWEREX THYRISTOR MODULE A1 103 001 020 8713

FAIRCHILD EA-13367-1 REPAIR KIT, NIB

BRAD HARRISON 250V 4A 4P 5M MICRO-CHANGE FEMALE CORDSET, 804000A09M050 *NEW*

DWYER 125/250/480VAC 15A 10 PSI 180F PRESSURE SWITCH, 1823-5 SER. 1800 *NEW*

SICK C40S-0903DC200

ASHCROFT 45-1279-SS-04L 30/0 IMV 4 1/2 DURAGAUGE, NIB

PHOENIX CONTACT 125VAC 15A RAIL MOUNTABLE DUAL SOCKET EM-DUO 120/15 5600461

WESTCODE THYRISTOR MODULE BISCR15001850 0202

APPLETON EXPLOSION PROOF CONDUIT FITTING 3/4" EYF-EYM NNB

SIEMENS 3SB3 110-1HA20 EMERGENCY STOP BUTTON, 3ZX1012-0SB30-1AA1, NIB

ADALET PLM 2-7/8" NPT ARMORED CABLE CONNECTOR, JAG-250

ALLIED ELECTRONICS 6K235HF LOW POWER TRANSFORMER NIB

GC VALVES 24VDC SOLENOID COIL, HS4YN16 *NEW*

HONEYWELL MICROSWITCH 250VAC 4A LIMIT SWITCH, LSYAC1ADD

BOSCH 12:1 RATIO GEAR REDUCER, 3 842 516 621

DYNEX THYRISTOR MODULE DCR504ST1515-1183A 0421

PARKER 240V 60HZ SOLENOID VALVE, 202952 *NEW*

DWYER 117V 10A 25 PSIG 120F PHOTOHELIC PRESSURE SWITCH/GAGE, 3050 *NEW*

ITT CORP 1-316L-RA35MAX-CWP200, 1" ITT 2360 TYC CF8M

PICOMA BECK GALVANIZED CONDUIT COUPLING 1 1/2" THREAD LOT OF 13 NNB

DWYER 240VAC 125VDC EXPLOSION-PROOF PRESSURE SWITCH, 1950G-5-B

SQUARE D MECHANICAL INTERLOCK KIT 9423M1

A-H&H 250VDC 600VAC 20-30A POWER-LOCK

TPC * QUICK CONNECT CORD SET M/F EXT CNLC 4P 2M * 94412 REV. G

MARSHALL TOWN 0-20 OZ. PER SQ.IN. 1/4" NPT WATER PRESSURE GAUGE, 90266

MATSUSHITA ELECTRIC BUV54Z1455ZZT 540 VAC 14.5 MFD CAPACITOR, LOT OF 5, NEW

FANUC POWER CABLE CP9I-OMPB-0150-AAA, SEALED

BRAD HARRISON MPIS 410P401 MULTI-PORT INTERCONNECT SYSTEM, NIB

LEUKHARDT BK MIKRO 4 24V, 0.25A RELAY MODULE 8.0403.04

CUSTOM CONTROL SENSORS 125/250/480VAC 15A 750 PSIG PRESSURE SWITCH, 604G1

NERLITE 12VDC 75MA S-40 SPOT ARRAY ILLUMINATOR, 650302 *NEW*

RELIANCE ELECTRIC M052576005T007916716KA APPROX 1" DIA. SHAFT 0.9 HP MOTOR, NEW

ALLEN BRADLEY 60A 600VAC-250VDC SER. A LINE TERMINAL GUARD1494V-DS60

MICRO SWITCH LSYFC1ADD NNB

IR INTERNATIONAL RECTIFIER  THYRISTOR MODULE 410403.24AW 9121

ALLEN BRADLEY AMBER ILLUMINATED PILOT LIGHT 800T-QT24R  *NEW IN BOX*

AMPHENOL CIRCULAR CONNECTOR PTO2E-14-19P , 1073/21 V 22A

TURCK QPAK TEFLON COVERS FOR QPAK SENSORS, T-Q08-T-MCC *NEW LOT OF 28*

REOTEMP THERMOMETER AA/04/04/F55 MODEL A 4"STEM 25 TO 125F NIB

RJG TECHNOLOGIES,INJECTION MOLDING MONITORING SYSTEM,PM-4005

HYDRAULIC LIQUID FILLED PRESSURE GAUGE 0-160PSI NNB

VICKERS DCPFS-12-5-20 FLANGE VALVE NNB

COIL HOSE PNEUMATICS 11Q11KSCH

AIR MONITOR CORPORATION MASS-tron II MASS FLOW TRANSMITTER W/ COLD MIX E33305

METRON 56 LB/PULG 4 KG/CM2 LIQUID FILLED PRESSURE GAUGE, NOM-I

REXROTH ZDR6DA2-43/150YV PRESSURE REDUCING HYDRAULIC VALVE NNB

B-LINE 82015 3"STD 3 1/2"OD CLAMPS NNB LOT OF 35

GERWAH BELLOW SHAFT COUPLING AK500 NNB

ROSEMOUNT HAND HELD REMOTE TRANSMITTER MODEL 268 104805

KROHNE 1.4-20MA 150PSI ALTOMETER IFC090/F/D/HART/6