I-actuator ye-pneumaticisisekeli esiyinhloko yi-valve positioner elawulayo.Isebenza ngokuhambisana ne-actuator yomoya ukuze kwandiswe ukunemba kwendawo yevalvu, inciphise imiphumela yamandla okungalingani okuphakathi nendawo kanye nokungqubuzana kwesiqu, futhi iqinisekise ukuthi ivalvu isabela kusignali yesilawuli.thola indawo efanele.

Lezi zimo ezilandelayo zenza kudingeke ukuthi kusetshenziswe indawo yokubuka indawo:

1. Uma kunomehluko omkhulu wengcindezi kanye nomfutho ophakathi nendawo;

2. Uma izinga levalvu elawulayo likhulu (DN > 100);

3. Ivalvu elawula izinga lokushisa eliphezulu noma eliphansi;

4. Lapho kubalulekile ukusheshisa umsebenzi wevalvu elawulayo;

5. Uma amasiginali ajwayelekile asetshenziswa ukushayela ama-actuator ngobubanzi bentwasahlobo obungajwayelekile (ububanzi basentwasahlobo ngaphandle kuka-20-100KPa);

6. Noma nini lapho kusetshenziswa ukulawulwa kobubanzi bokuhlukanisa;

7. Uma i-valve iphendulwa, izikhombisi-ndlela zomoya-ukuvala kanye ne-air-to-open zishintshashintsha;

8. Lapho i-positioner cam idinga ukushintshwa ukuze kushintshwe izici zokugeleza kwevalvu;

9. Uma kufunwa isenzo esilinganayo, asikho isidingo se-spring noma i-piston actuator;

10. Izibonisi zamavalvu zikagesi-womoya kufanele zisatshalaliswe lapho kusetshenziswa amasiginali kagesi ukulawula ama-actuator womoya.

I-valve ye-electromagnetic:
I-valve ye-solenoid kufanele ifakwe ohlelweni lapho ukulawulwa kohlelo noma ukulawulwa kwezindawo ezimbili kuyadingeka.Ukusebenzisana phakathi kwe-valve ye-solenoid kanye ne-valve elawulayo kufanele kucatshangelwe lapho kukhethwa i-solenoid valve ngaphezu komthombo wamandla we-AC ne-DC, i-voltage, kanye nemvamisa.Ingaba nomsebenzi "ovulekile ngokujwayelekile" noma "okuvalwe ngokujwayelekile".
Ama-valve amabili e-solenoid angasetshenziswa ngokuhambisana uma kudingekile ukwandisa umthamo we-solenoid valve ukuze kuncishiswe isikhathi sokusebenza, noma i-solenoid valve ingasetshenziswa njenge-valve yokushayela ngokuhambisana ne-relay yomoya yomthamo omkhulu.
I-pneumatic relay:
I-pneumatic relay uhlobo lwesikhulisi samandla esingadlulisa isignali yomfutho womoya kude ukuze kuncishiswe isikhathi esilethwa ukwelulwa kwepayipi lesignali.Phakathi kwesilawuli kanye ne-valve elawula insimu, kunomsebenzi owengeziwe wokukhulisa noma ukunciphisa isignali.Isetshenziswa ngokuyinhloko phakathi kwe-transmitter yasensimini kanye nedivayisi yokulawula egumbini lokulawula elimaphakathi.

isiguquli:
Kunezinhlobo ezimbili zama-converter: i-converter yegesi kagesi kanye ne-gas-electric converter.Ukuqaphela ukuguqulwa okuhambisanayo kobudlelwane obuthile phakathi kwegesi namasignali kagesi yilokho okwenzayo.Isetshenziswa kakhulu ukuguqula amasignali egesi angu-0 100KPa abe amasignali kagesi angu-0 10 mA noma 0 4 mA, noma amasignali kagesi angu-0 10 mA noma angu-4 mA abe amasignali kagesi angu-0 10 mA noma angu-4 mA.

Isilawuli sesihlungi somoya:
Okunamathiselwe kwedivayisi esetshenziswa nemishini yezimboni ezishintshayo yisihlungi somoya valvu yokwehlisa.Umsebenzi wawo oyinhloko uwukusimamisa ingcindezi ezingeni olifunayo ngenkathi ihlunga futhi ihlanza umoya ocindezelwe ophuma ku-compressor yomoya.Isilinda somoya, okokusebenza kokufafaza, imithombo yokuphakelwa komoya, nemishini yokusimamisa ingcindezi yamathuluzi amancane omoya ezinye zezibonelo zamathuluzi omoya namavalvu e-solenoid angasetshenziswa kuwo.

I-valve yokuzikhiya (i-valve yokuphepha):
I-valve yokuzikhiya iwumshini ogcina i-valve isendaweni.Uma umthombo womoya wehluleka, idivayisi ingacisha isignali yomthombo womoya ukuze igcine ikamelo le-membrane noma isignali yokucindezela yesilinda ezingeni layo langaphambi kokwehluleka kanye nendawo yevalvu endaweni yayo yangaphambi kokwehluleka.Emthelela wokuvikela isikhundla.

i-valve position transmitter
Lapho i-valve yokulawula ikude negumbi lokulawula, kuyadingeka ukuhlomisa i-valve position transmitter, eguqula ukugudluka kwe-valve yokuvula ibe isignali kagesi futhi iyithumele ekamelweni lokulawula ngokuvumelana nomthetho onqunywe kusengaphambili, ukuze qonda kahle indawo yokushintsha ye-valve ngaphandle kokuya kusayithi.Isignali ingase ibe isignali eqhubekayo emele noma yikuphi ukuvulwa kwe-valve noma ingase ithathwe njengomsebenzi wokuhlehlisa isihleli se-valve.

Iswishi yokuvakasha (isixhumi)
Iswishi yomkhawulo iyingxenye edlulisela ngesikhathi esisodwa isignali yenkomba futhi ikhombisa izindawo ezimbili ezeqisayo zeswishi yevalvu.Igumbi lokulawula lingabika isimo sokushintshwa kwe-valve ngokusekelwe kule signali futhi lithathe isinyathelo esifanele.