1 Amaphuzu abalulekile okukhethwa kwevalvu

1.1 Cacisa inhloso yevalvu emshinini noma ocingweni

Ukunquma izimo zokusebenza ze-valve: uhlobo lwendawo esebenzayo, ingcindezi yokusebenza, izinga lokushisa lokusebenza nezindlela zokulawula ukusebenza, njll.;

1.2 Ukukhetha kahle uhlobo lwevalvu

Imfuneko yokukhethwa okulungile kohlobo lwe-valve ukuthi umklami uyiqonda ngokugcwele yonke inqubo yokukhiqiza nezimo zokusebenza. Lapho abaklami bekhetha izinhlobo zamavalvu, kufanele baqale baqonde izici zesakhiwo nokusebenza kwevalvu ngayinye;

1.3 Nquma indlela yokunqanyulwa kwevalvu

Phakathi koxhumano oluluchungechunge, ukuxhumana kwe-flange, nokuxhumana kokugcina okushiselwe, okubili kokuqala yizona ezisetshenziswa kakhulu.Ama-valve anemicuikakhulukazi ama-valve anobubanzi obuncane obungaphansi kwama-50mm. Uma ububanzi bukhulu kakhulu, kuyoba nzima kakhulu ukufaka nokuvala uxhumano. Ama-valve oxhumano lwe-Flange kulula ukuwafaka nokuwahlakaza, kodwa makhulu futhi abiza kakhulu kunama-valve anentambo, ngakho afaneleka ukuxhumeka kwamapayipi amadayimitha ahlukahlukene wamapayipi nezingcindezi. Izixhumanisi ezishiselwe zifanele izimo zomthwalo osindayo futhi zithembeke kakhulu kunoxhumo lwe-flange. Kodwa-ke, kunzima ukuhlukanisa nokufaka kabusha ama-valve ashiselwe, ngakho ukusetshenziswa kwawo kunqunyelwe ezimweni lapho ngokuvamile angasebenza khona ngokwethembeka isikhathi eside, noma lapho izimo zokusebenza zinzima futhi izinga lokushisa liphezulu;

1.4 Ukukhethwa kwempahla yevalvu

Lapho ukhetha izinto zokwakha izindlu ze-valve, izingxenye zangaphakathi nezindawo zokuvala uphawu, ngaphezu kokucabangela izakhiwo ezibonakalayo (izinga lokushisa, ingcindezi) kanye nezakhiwo zamakhemikhali (ukugqwala) kwendawo yokusebenza, ukuhlanzeka kwendawo (ukuba khona noma ukungabikho kwezinhlayiya eziqinile. ) kufanele futhi kubhekwe kufanele kubhekwe. Ukwengeza, kufanele futhi ubhekisele emithethweni efanele yezwe kanye nomnyango wabasebenzisi. Ukukhethwa okulungile nokunengqondo kwezinto ze-valve kungaqinisekisa impilo yesevisi eyonga kakhulu kanye nokusebenza okungcono kakhulu kwe-valve. Ukulandelana kokukhethwa kwempahla yomzimba we-valve yile: insimbi engagqwali ye-iron-carbon steel-stainless, kanye nokulandelana kokukhetha impahla yendandatho yokuvala ithi: irabha-yethusi-alloy steel-F4;

1.5 Abanye

Ukwengeza, izinga lokugeleza kanye nezinga lokucindezela koketshezi olugeleza ku-valve kufanele kunqunywe futhi i-valve efanele ikhethwe kusetshenziswa ulwazi olutholakalayo (njengamakhathalogi omkhiqizo we-valve, amasampula omkhiqizo we-valve, njll.).

2 Isingeniso kumavalvu asetshenziswa kakhulu

Kunezinhlobo eziningi zama-valve, okuhlanganisa ama-valve esango, ama-globe valves, ama-throttle valves, ama-butterfly valves, ama-plug valve, ama-ball valve, ama-valve kagesi, ama-diaphragm valve, ama-sheke valve, ama-valve okuphepha, ama-valve okunciphisa ingcindezi, izicupho kanye nama-valve okuvala okuphuthumayo, phakathi kwazo ezivame ukusetshenziswa Kukhona ama-valve esango, ama-globe valves, ama-throttle valves, ama-plug valves, ama-butterfly valves, ama-ball valve, ama-sheke valve, ama-diaphragm valve, njll.

2.1I-valve yesango

Ivalvu yesango isho ivalvu umzimba wayo wokuvula nokuvala (i-valve plate) ishayelwa isiqu se-valve futhi yehla inyuka ihambisana nendawo yokuvala yesihlalo sevalvu ukuze ixhume noma inqamule uketshezi lwamanzi. Uma kuqhathaniswa nama-stop valves, ama-valve esango anokusebenza kangcono kokuvala, ukumelana noketshezi oluncane, umzamo omncane wokuvula nokuvala, futhi abe nokusebenza okuthile kokulungisa. Zingamanye ama-stop valves asetshenziswa kakhulu. Okubi ukuthi inkulu ngobukhulu futhi iyinkimbinkimbi kakhulu ngesakhiwo kune-valve yokumisa. Indawo yokubeka uphawu kulula ukuyigqoka futhi kunzima ukuyinakekela, ngakho ngokuvamile ayifaneleki ukunyakazisa. Ngokwesimo sentambo esiqwini se-valve ye-valve yesango, ihlukaniswe yaba izigaba ezimbili: uhlobo lwe-stem evulekile kanye nohlobo lwe-stem olufihliwe. Ngokwezici zesakhiwo sesango, lingahlukaniswa ngezinhlobo ezimbili: uhlobo lwe-wedge kanye nohlobo oluhambisanayo.

2.2Misa i-valve

I-valve ye-globe iyi-valve evala iye phansi. Izingxenye zokuvula nezokuvala (ama-valve discs) aqhutshwa isiqu se-valve ukuze siye phezulu naphansi eduze kwe-eksisi yesihlalo se-valve (indawo yokuvala). Uma kuqhathaniswa nama-valve esango, anokusebenza okuhle kokulawula, ukusebenza kabi kokuvalwa, isakhiwo esilula, ukukhiqiza nokugcinwa okulula, ukumelana noketshezi olukhulu, kanye nentengo eshibhile. Kuyivalvu yokumisa evame ukusetshenziswa, evame ukusetshenziswa kumapayipi aphakathi nendawo namancane.

2.3 I-valve yebhola

Ingxenye yokuvula neyokuvala ye-valve yebhola iyibhola elinendilinga ngokusebenzisa imbobo. Ibhola lizungeza nesiqu se-valve ukuvula nokuvala i-valve. I-valve yebhola inesakhiwo esilula, ukuvulwa okusheshayo nokuvala, ukusebenza okulula, usayizi omncane, isisindo esilula, izingxenye ezimbalwa, ukumelana noketshezi oluncane, ukufakwa uphawu okuhle nokugcinwa kalula.