本特利330180-90-00              

詢價熱線電話`1 8 0 5 0 0 3 6 9 4 5 `】【詢價座機--0592-6808374 】【詢價QQ :3443643092 】 

   

  1) 由于PLC是通過輸入電路接受開關量、模擬量等輸入信號，因此輸入電路的元器件質量的好壞和連接方式直接影響著控制系統的可靠性。比如：按鈕、行程開關等輸入開關量的觸點接觸是否良好、接線是否牢固等。設備上的機械限位開關是比較容易產生故障的元件。在設計時，應盡量選用可靠性高的接近開關代替機械限位開關。此外，按鈕的常開和常閉觸點的選擇也會影響到系統的可靠性。現以一個簡單的起動、停止控制線路為例，如圖2和圖3所示的是兩個控制線路和它們的對應梯形圖。這兩個控制線路的控制功能完全一樣，按下起動按鈕，輸出動作；按下停止按鈕，輸出斷開；但它們的可靠性不一樣。我們假設輸出斷開為安全狀態，那么圖3的可靠性要比圖2的高。這是因為SB1、SB2都有發生故障的可能，而最常見的現象是輸入電路開路。當采用圖3電路時，不論SB1、SB2開關本身開路還是接線開路，輸出都為安全狀態，保證了系統的安全和可靠。

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LADISH 2" 275PSI@100°F CHECK VALVE 8273-0714-20B
 
HonEYWELL SKINNER VALVE 120 VOLTAGE A 3 LB 2 127AB96A46 NIB
 
POWELL VALVE 3/4" 1975PSI@100°F GLOBE VALVE GL08SA58GB
 
FLOWSERVE ULTRASWITCH W/ COMPACT ACTUATOR C25 SR-2C IMP & 1IN 150 CF8M VALVE
 
CAT PUMP VALVE KIT 33835
 
AUTOMATIC VALVE 10BAR 150PSIG PNEUMATIC SOLENOID VALVE 413B65S31C-DB7
 
SMC 3 VALVE MANIFOLD base PLASTIC THREAD AT END CRAKCED
 
MAXON 3/4" 125 PSIG SHUT-OFF VALVE, 5000-0
 
SMC 0-0.5MPA 1" NPT SOLENOID PROCESS VAVLE V0307-5TZ
 
FAIRBANKS 8" GATE VALVE 104043
 
NUMATICS 24VDC 6W SOLENOID VALVE 030SA446E000061?/236-115B
 
NORGREN 30-150PSI 1/4"NPT SOLENOID VALVE 375-02-007-32-0?2/00 *NNB*
 
PARKER * ConTROL SOLENOID VALVE * D3W1B56Y
 
GRACO VALVE SERVICE KIT 560-001-960 *NEW*
SMC 0-0.5MPA 1" NPT SOLENOID PROCESS VAVLE V0307-5TZ
 
FAIRBANKS 8" GATE VALVE 104043
 
NUMATICS 24VDC 6W SOLENOID VALVE 030SA446E000061?/236-115B
 
PARKER * ConTROL SOLENOID VALVE * D3W1B56Y
 
GRACO VALVE SERVICE KIT 560-001-960 *NEW*
 
ARMSTRONG THERMOSTATIC STEAM TRAP D1175-5 NIB
 
SMC SOLENOID VALVE VP3145-045DZB1-?NSW/2 225-344B
 
FABRI-VALVE 150CWP S316 10" KNIFE GATE VALVE F440745 67
 
NUMATICS 1/4"NPT REGULATOR VALVE NO GAUGE I34RD100J0503K0?0
 
SHICK 8" I.D. 11" O.D. STAINLESS STEEL ROTARY VALVE T-224
 
PARKER DIRECTIonAL VALVE D1VW001CVYCF4
 
ROSS ConTROLS 150 PSIG 1-1/4" NPT PILOT OPERATED CHECK VALVE, 2751B7901 NNB
 
SMC 26V .15-1.0MPA SOLENOID VALVE NVFS2400 *NEW*
 
BOSCH 1700PSI PRESSURE REDUCING VALVE 0 811 145 115 *NEW*
 
WATTS REGULATOR 600 PSI 3/4" NPT BRASS BALL VALVE, B-6800
 
VICKERS ALUM VALVE HOUSING 23035 REV. 3
 
APOLLO 1/2" LOCKING BALL SHUT OFF VALVE 70-103-27
 
TOYO-OKI WHD3A-D-V30-BCA?-025A-S1D VALVE W/ TOYOOKI ECAD-MS-S1D
 
ACCUTRAK 1040 DUAL DISPLAY W/ 3" OPEN/CLOSE 2KE VALVE 104357
 
metaLWORK PNEUMATIC REGULATOR VALVE
 
NUMATICS 150PSI DOUBLE SOLENOID VALVE 152JJ441O000000 *NEW*
 
WILKERSON 3/8" PORT / 3/4" THREADS SOLENOID VALVE N28-06-0C00
 
METREX VALVE WATER REGULATING VALVE 50-250PSI
 
PARKER 120/110V, 60/50HZ, .72-.75A, 3000 PSI, DIRECTIonAL ConTROL VALVE D3W1HNYC
 
SMC/ FLC 3/8"NPT FLOW SWITCH W SOLENOID VALVE AND PLUG ATTACHMENT L-61456/VX2330
 
WANDFLUH SOLENOID VALVE P135V-M40 NIB
 
NUMATICS 150PSI SOLENOID VAVLE 554JK43AO *NEW*

FLOWSERVE DURA SEAL PUMP SEAL CARTRIDGE GKB2135501B NIB

 

MODULAR DIVIDER VALVE SUB-PLATE NPSF

 

NUMATICS SOLENOID VALVE 11DSA-4410

 

SMC PNEUMATIC VALVE VHS4500-03

 

NUMATICS 150PSIG PNEUMATIC SOLENOID VALVE 031SA446C000030 / 237-958B NIB

 

NUMATICS 150PSIG PNEUMATIC SOLENOID VALVE ISO5599/11 / 134BB400KP

 

ARMSTRON MACHINE WORKS AM-91 STEAM HUMIDIFIER, NNB

 

DELTROL ConTROLS 24VDC 6.5W 90PSI SOLENOID VALVE DSV28-090-A08F-?P91 99344

 

SERVICE FIRST THERMO EXPANSION VALVE VAL04911 NIB

 

NORGREN 0-60PSI 0-4.0BAR PRESSURE GAUGE

 

PARKER 24VDC 3.0A 5000 PSI HYDRAULIC SOLENOID VALVE, D1FXE01FCVDJ004?0 NNB

 

ROSS PORT RIGHT ANGLE PO CHECK VALVE 1958A1010 NNB

 

HUNT VALVE COMPANY 150PSI, 250PSI FLO-DIRECTOR VALVE MODEL 43

 

ASCO MP-C-080 / 238210-032D SOLENOID VALVE COIL

 

MAC 15W 120/40V PNEUMATIC SOLENOID VALVE 250B-181CAAA

 

MAC VALVE REPAIR KIT K-09001C

 

REXROTH PNEUMATIC VALVE NIB 0820 402 046

 

LUBRIQUIP SHUT-OFF VALVE 527-005-180

 

ASCO SOLENOID VALVE 8551A001MS 99686

 

NUMATICS 150PSIG PNEUMATIC SOLENOID VALVE 031SA400C / 237-958B NIB

 

ROSS 20.7BAR MAX LINE FILTER REGULATOR 5211B5027 100070

 

UNKNOWN MFG * EASY READ VALVE * EF 35 B

 

JAMESBURY 18" BUTTERFLY VALVE ACTUATOR ST-1800 MOD. A

 

ASCO SOLENOID VALVE 120/60 MP-C-080 272610-132-D

 

SUN HYDRAULICS 1000PSI RPEC FAN RELIEF VALVE 89341 71110 NIB

 

SUN HYDRAULICS VAVLES 60069-C NIB

 

JAMESBURY ST-400B ACTUATOR 8" 316SS BUTTERFLY VALVE 815W-11-3600-MT W/ P-2000

 

NUMATICS 120V .11A 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, 152SA400K

 

NUMATICS 150PSIG SOLENOID VALVE 237-1008B / 237-1011B / 031SS6002000030

 

NUMATICS 120V .16A 50/60HZ 150 PSIG-AIR SOLENOID VALVE, 33DSP4410 *REPAIRED*

 

NUMATICS 110/120V .37A 150 PSIG-AIR SOLENOID VALVE W/ base, I35SA43BK066E30

 

BOSCH 4500PSI 315BAR PRESSURE REDUCING VALVE 0 811 150 234

 

ASCO 110/120V 25PSI SOLENOID VALVE 821BB 0