Chii chinonzi NPT thread?
NPT inomirira National Pipe Taper, inova muyero wekuUS weshinda dzakatepwa dzinoshandiswa pamapombi nepombi zvinoiswa nechinangwa chekusunga. Tambo dzeNPT dzakagadzirwa kuti dzipe chisimbiso chisina kubvinza kana ichishandiswa neshinda sealant, seTeflon tepi kana pombi dope. Iyo taper patambo yeNPT inoibvumira kuumba chisimbiso kana ichibatanidzwa neimwe shinda yakadhindwa.
Hunhu hwakakosha hweNPT tambo dzinosanganisira:
1. Taper:Iyo dhayamita yekunze (OD) yeshinda inoderera zvishoma kubva pakutanga kusvika kumagumo eshinda. Iyi taper, inowanzoita 1/16 inch per inch, inobatsira mukugadzira chisimbiso chakasimba sezvo zvikamu zvakasimbiswa pamwechete.
2. Thread angle: Tambo dzeNPT dzine 60-degree thread angle, yakafanana nemamwe akawanda screw thread standards, asi chimiro uye spacing zvakagadzirirwa zvakananga kubatanidzwa kwepombi.
3. Pitch: Chimiro (nhamba yeshinda pa inch) inosiyana zvichienderana nehukuru hwezita repombi. Semuenzaniso, 1/8-inch NPT ine tambo makumi maviri nenomwe painch, nepo 2-inch NPT ine 11.5 tambo pa inch.
4. Chisimbiso:Kuti uone chisimbiso chakakodzera, chinovhara shinda chinofanira kushandiswa. Pasina iyo, pane mukana wakakura wekudonha nekuti iyo simbi-kune-simbi yekusangana chete haigadziri chisimbiso chakakwana.
5. Kusimbisa Maoko:Tambo dzeNPT dzinofanirwa kutanga dzakasimbiswa nemaoko, dzozopihwa mamwe majana ane wrench kuti uwane chisimbiso chakakodzera. Nhamba yekuwedzera kutendeuka kunoenderana nehukuru hwekukodzera uye zvinhu; kazhinji, 1.5 kusvika 3.5 kutendeuka kupfuura minwe yakasimba inokurudzirwa.
NPT tambo dzinowanzo shandiswa mupombi dzemvura, hydraulics, uye pneumatic masisitimu, pakati pevamwe, uko yakachengeteka, inovuza-proof yekubatanidza inodiwa. Iko kune zvakare yakaoma-chisimbiso shanduro inonzi NPTF (National Pipe Taper Fuel) iyo yakagadzirirwa kupa mechanical chisimbiso pasina kudiwa kwechisimbiso chakasiyana, kunyange zvazvo mamwe mapurogiramu angave achiri kuda chisimbiso chekuchengetedzwa kwakawedzerwa.
Kune chero mimwe mibvunzo ine chekuita neNPT fittings kana iyo yese yechigadzirwa catalog, ndapota taura nesu.