Kedu ihe bụ eriri NPT?

NPT na-anọchi anya National Pipe Taper, nke bụ ọkọlọtọ US maka eriri tepeed nke ejiri na ọkpọkọ na akwa ọkpọkọ maka ebumnuche akara. Emebere eriri NPT iji nye akara na-enweghị nkwụsị mgbe ejiri eriri eri, dị ka Teflon teepu ma ọ bụ ọkpọkọ dope. Ihe nkedo dị na eri NPT na-enye ya ohere ịmepụta akara mgbe ejikọtara ya na eriri ọzọ a kpụrụ akpụ.

Isi njirimara nke eriri NPT gụnyere:

1. Mkpa:Dayameta dị n'èzí (OD) nke eri ahụ na-ebelata ntakịrị site na mmalite ruo na njedebe nke eriri ahụ. Nke a taper, nke na-adịkarị 1/16 inch kwa inch, na-enyere aka ịmepụta akara siri ike ka akụkụ ahụ na-ejikọta ọnụ.

2. eriri eriri: NPT eri nwere 60-ogo eri angle, yiri ọtụtụ ndị ọzọ ịghasa ụkpụrụ ụkpụrụ, ma udi na spacing na-kpọmkwem e mere maka ọkpọkọ njikọ.

3. Mgbapụta: The pitch (ọnụọgụ nke eri kwa inch) dịgasị iche iche dabere n'aha ọkpọkọ size. Dịka ọmụmaatụ, NPT 1/8-inch nwere eriri 27 kwa inch, ebe NPT nke anụ ọhịa 2 nwere eri 11.5 kwa inch.

4. Akara:Iji hụ na akara kwesịrị ekwesị, a ga-eji eriri eri eme ihe. Na-enweghị ya, enwere ike ịpụpụ n'ihi na kọntaktị metal na metal naanị anaghị emepụta akara zuru oke.

5. Na-agbatị aka:Ekwesịrị ibu ụzọ mechie eriri NPT n'aka, wee nyekwa ya ntụgharị ọzọ na eriri iji nweta akara kwesịrị ekwesị. Ọnụ ọgụgụ nke ntụgharị ndị ọzọ na-adabere na nha nke dabara na ihe onwunwe; N'ozuzu, 1.5 ruo 3.5 tụgharịa gafere mkpịsị aka ike ka akwadoro.

A na-ejikarị eriri NPT eme ihe na plọbing, hydraulics, na sistemu pneumatic, n'etiti ndị ọzọ, ebe a na-achọ njikọ echekwabara, nke na-agbapụta. Enwekwara ụdị mkpuchi akọrọ akpọrọ NPTF (National Pipe Taper Fuel) nke emebere iji nye akara igwe na-enweghị mkpa maka mkpuchi dị iche, ọ bụ ezie na ngwa ụfọdụ ka nwere ike ịchọ mkpuchi maka nchekwa agbakwunyere.

Maka ajụjụ ọ bụla ọzọ metụtara NPT fittings ma ọ bụ ndị ọzọ na ngwaahịa katalọgụ, biko kpọtụrụ anyị.