Onani valavu: Valve yowunikira imadziwikanso ngati valavu yanjira imodzi kapena valavu yoyendera, ntchito yake ndikuletsa sing'anga mu payipi Backflow.Valavu yapansi ya mpope yotseka madzi imakhalanso m'gulu la valve yosabwerera.Valavu yomwe imatsegula kapena kutseka yokha mwa kuyenda ndi mphamvu yapakati kuti ateteze sing'anga kubwerera kumbuyo imatchedwa check valve.Ma valve owunika ali m'gulu la ma valve otomatiki.Ma valve owunikira amagwiritsidwa ntchito makamaka m'mapaipi pomwe sing'anga imayenda mbali imodzi, ndipo amangolola sing'anga kuyenda mbali imodzi kuti apewe ngozi.Malinga ndi kapangidwe ka valavu cheke, akhoza kugawidwa mu mitundu itatu: kukweza valavu cheke, swing valavu cheke ndi valavu gulugufe.Ma valve okwera amatha kugawidwa m'mitundu iwiri: ma valvu oyang'ana owoneka ndi ma valve opingasa.Mavavu oyendera ma swing amagawidwa m'mitundu itatu: valavu yoyang'ana tsamba limodzi, valavu yoyang'ana kawiri ndi valavu yoyang'ana masamba ambiri.Vavu yoyang'ana gulugufe ndi valavu yowunikira molunjika.Ma valve omwe atchulidwa pamwambapa amatha kugawidwa m'mitundu itatu mu mawonekedwe olumikizirana: valavu yoyang'ana yolumikizidwa, valavu yoyang'ana flanged ndi valavu yolumikizira.
Kuyika kwa valve yoyang'ana kuyenera kumvetsera zotsatirazi: Musapangitse kuti valavu yowunika ikhale yolemera mu payipi, ndipo valavu yaikulu yowunikira iyenera kuthandizidwa paokha kuti isakhudzidwe ndi kupanikizika kopangidwa ndi mapaipi.
Poikapo, tcherani khutu kumayendedwe apakati akuyenera kukhala ogwirizana ndi momwe muvi wavotera ndi thupi la valve.
Valavu yoyang'ana yokwera iyenera kuyikidwa paipi yoyima.Valavu yoyang'ana yokwera yamtundu wa lifti iyenera kuyikidwa paipi yopingasa.
Magawo akuluakulu a ntchito ya valve cheke: Kuthamanga mwadzina kapena kupanikizika kwapadera: PN1.0-16.0MPa, ANSI CLASS1 50-900, JIS 10-20K, m'mimba mwake mwadzina kapena caliber: DN15-900.
NPS 1/4-36, njira yolumikizira: flange, kuwotcherera matako, ulusi, kuwotcherera zitsulo, etc., kutentha koyenera: -196 ℃-540 ℃, valavu thupi zakuthupi: WCB.
ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (3041), CF8M (316), CF3M (316L), Ti, kusankha zipangizo zosiyanasiyana, mavavu cheke angagwiritsidwe ntchito madzi, nthunzi, mafuta, nitric asidi, asidi asidi, makutidwe ndi okosijeni Kugonana media, urea ndi media zina.