I-actuator ye-pneumaticIsengezo esiyinhloko yi-valve positioner elawulayo. Isebenza ngokubambisana ne-pneumatic actuator ukwandisa ukunemba kwesikhundla se-valve, ukunciphisa imiphumela yamandla angalingani kanye nokungqubuzana kwesiqu se-medium, nokuqinisekisa ukuthi i-valve isabela esignalini yomlawuli. Ifinyelela indawo efanele.

Lezi zimo ezilandelayo zidinga ukusetshenziswa kwe-locator:

1. Uma kukhona umehluko omkhulu wokucindezela kanye nomfutho ophakathi nendawo ophezulu;

2. Uma ubukhulu bevalvu yokulawula bukhulu (DN > 100);

3. Ivalvu elawula amazinga okushisa aphezulu noma aphansi;

4. Uma kubalulekile ukusheshisa umsebenzi wevalvu yokulawula;

5. Uma izimpawu ezijwayelekile zisetshenziswa ukushayela ama-actuator anezinhlobo ze ...

6. Noma nini lapho kusetshenziswa ukulawula ububanzi obuhlukanisiwe;

7. Uma ivalvu iphendulwa, iziqondiso zokuvala umoya kanye neziqondiso zokuvula umoya ziyashintshana;

8. Uma ikhamera yesimo idinga ukuguqulwa ukuze kushintshwe izici zokugeleza kwevalvu;

9. Uma kudingeka isenzo esilinganayo, asikho isidingo se-actuator yesipilingi noma ye-piston;

10. Ama-valve positioners kagesi-omoya kumele asatshalaliswe lapho kusetshenziswa amasignali kagesi ukulawula ama-actuator omoya.

I-valve kagesi:
I-valve ye-solenoid kumele ifakwe ohlelweni uma kudingeka ukulawulwa kohlelo noma ukulawulwa kwezikhundla ezimbili. Ukusebenzisana phakathi kwe-valve ye-solenoid ne-valve elawulayo kumele kucatshangelwe lapho kukhethwa i-valve ye-solenoid ngaphezu komthombo wamandla we-AC ne-DC, i-voltage, kanye nemvamisa. Ingaba nokusebenza "okuvame ukuvuleka" noma "okuvame ukuvalwa".
Amavalvu amabili e-solenoid angasetshenziswa ngesikhathi esifanayo uma kudingeka ukwandisa umthamo wevalvu ye-solenoid ukuze kuncishiswe isikhathi sokusebenza, noma ivalvu ye-solenoid ingasetshenziswa njengevalvu yokushayela kanye ne-relay ye-pneumatic enamandla amakhulu.
Ukudluliselwa komoya:
I-relay ye-pneumatic uhlobo lwe-amplifier yamandla engadlulisela isignali yokucindezela komoya kude ukuze kuncishiswe isikhathi sokulibaziseka esibangelwa ukwelulwa kwepayipi lesignali. Phakathi komlawuli kanye ne-valve elawula insimu, kunomsebenzi owengeziwe wokukhulisa noma ukunciphisa ukukhulisa isignali. Isetshenziswa ngokuyinhloko phakathi komthumeli wensimu kanye nedivayisi elawulayo egumbini lokulawula eliphakathi.

isiguquli:
Kunezinhlobo ezimbili zama-converter: i-converter kagesi kanye ne-converter kagesi kagesi. Ukuqaphela ukuguqulwa okuhambisanayo kobudlelwano obuthile phakathi kwe-gas kanye nezimpawu zikagesi yilokho ekwenzayo. Isetshenziswa kakhulu ukuguqula izimpawu zikagesi ezingu-0 100KPa zibe izimpawu zikagesi ezingu-0 10 mA noma ezingu-0 4 mA, noma izimpawu zikagesi ezingu-0 10 mA noma ezingu-4 mA zibe izimpawu zikagesi ezingu-0 10 mA noma ezingu-4 mA.

Umlawuli wokuhlunga umoya:
Isinamathiseli sedivayisi esisetshenziswa emishinini yokwenza izinto ngokuzenzakalela yezimboni yivalvu yokwehlisa umfutho wesihlungi somoya. Umsebenzi wayo oyinhloko ukuqinisa umfutho ezingeni elifunekayo ngenkathi uhlunga futhi uhlanza umoya ocindezelwe ovela kwi-compressor yomoya. Isilinda somoya, imishini yokufafaza, imithombo yokuphakelwa komoya, kanye namadivayisi okuqinisa umfutho wamathuluzi amancane omoya kuyizibonelo zezinsimbi zomoya namavalvu e-solenoid angasetshenziswa kuwo.

Ivalvu ezikhiyayo (ivalvu yokuphepha):
I-valve ezikhiyayo iyindlela egcina i-valve isendaweni yayo. Uma umthombo womoya uhluleka, idivayisi ingacima isignali yomthombo womoya ukuze igcine i-membrane chamber noma isignali yokucindezela yesilinda ezingeni layo langaphambi kokwehluleka kanye nendawo ye-valve ekusethweni kwayo kwangaphambi kokwehluleka. Kumphumela wokuvikelwa kwesikhundla.

umthumeli wesikhundla se-valve
Uma i-valve elawulayo ikude negumbi lokulawula, kuyadingeka ukuhlomisa i-transmitter yesikhundla se-valve, eguqula ukufuduka kokuvulwa kwe-valve ibe isignali kagesi bese iyithumela egumbini lokulawula ngokuhambisana nomthetho onqunyiwe, ukuze kuqondwe ngokunembile indawo yokushintsha ye-valve ngaphandle kokuya endaweni. Isignali ingaba isignali eqhubekayo emele noma yikuphi ukuvulwa kwe-valve noma ingabhekwa njengokusebenza kokubuyisela emuva kwe-valve positioner.

Ukushintsha kokuhamba (ukuxhumana)
Iswishi yomkhawulo iyisakhi esidlulisela isignali yesikhombisi ngasikhathi sinye futhi sibonise izikhundla ezimbili eziqine kakhulu zeswishi yevalvu. Igumbi lokulawula lingabika isimo seswishi sevalvu ngokusekelwe kulesi signali futhi lithathe isinyathelo esifanele.