Khetholla phaephe Φ, DN, le lisenthimithara ka potlako

Moralong le thekong ea liphaephe, li-fitting tsa liphaephe le li-valve, Φ, DN le lisenthimithara (“) ke li-unit tse tharo tsa litlhaloso tse ferekanyang habonolo. Phapang ea tsona ea mantlha ke hore: Φ e emela bophara ba 'nete ba kantle ba' mele, DN ke khoutu ea litlhaloso tsamaisong ea metric, 'me lisenthimithara ke khoutu ea litlhaloso tsamaisong ea borena. Ka mor'a moo, liphapang tse qaqileng le likhokahano lipakeng tsa tse tharo lia hlalosoa:

1. Liphapang litlhalosong tsa mantlha

Φ (bophara):Φ ke tlhaka ya Segerike eo boenjiniere bo emelang bophara ba 'nete ba 'mele (hangata bophara ba kantle). Ke boitsebahatso bo hlakileng ka ho fetisisa 'me ha bo hloke phetoho. Mohlala, Φ114.3 e bolela hore bophara ba 'nete ba kantle ba phaephe ke 114.3mm.

DN (Bophara ba Lebitso):DN (Bophara ba Nominal) ke bophara bo tloaelehileng tsamaisong ea metric. Hase bophara ba kahare kapa bophara ba kantle, empa ke "boholo ba nominal" bo boletsoeng ka maiketsetso bakeng sa boiketlo ba khokahano (hoo e ka bang karolelano ea bophara ba kahare le bophara ba kantle). Mohlala, DN100 ke khoutu ea litlhaloso feela 'me bophara ba eona ba 'nete ba kantle e ka ba 114.3mm kapa 108mm.

Senthimithara (“):Inch ke yuniti ya bolelele tsamaisong ya borena (inchi e le 1 = 25.4mm). Diphaepheng, e boetse e emela bophara bo tlwaelehileng. Mohlala, 4″ e emela phaephe ya 4-inch, mme bophara ba yona ba nnete ba kantle bo tsitsitse ho 114.3mm.

2. Ho hlaka le ho ikhetha ha boitsebiso

Φ E hlakileng ka ho fetisisa:bophara ba 'nete ba kantle bo tšoailoe ka ho toba, seo u se bonang ke seo u se fumanang, ha ho na ho hlaka.

Li-inchi li totobetse haholoanyane:Liphaepheng tsa Brithani (Phaephe), bophara ba kantle bo tsamaellanang le lisenthimithara bo ikhetha. Mohlala, 4″ ke Φ114.3, 10″ ke Φ273, ha ho hlokahale netefatso e eketsehileng.

Ho na le ho se hlaka ho DN:boleng bo tšoanang ba DN bo ka tsamaellana le letoto la bophara ba kantle bo fapaneng litsamaisong tsa liphaephe tsa lapeng. Mohlala, DN100:

- Letoto la I (Letoto la A/machabeng):bophara ba kantle ke Φ114.3mm

- Letoto la II (Letoto la B/tšebeliso ea lapeng):bophara ba kantle ke Φ108mm

Ka hona, ha o reka kapa o taka, haeba o ngola DN100 feela, o tlameha ho bontsha hore na ke letoto la I kapa la II, ho seng jwalo ho bonolo ho reka sehlahiswa se fosahetseng.

3. Kamano le phetolo pakeng tsa tse tharo

Tsena tse tharo li ke ke tsa fetoloa ka ho atisa le ho arola ka mokhoa o bonolo oa lipalo (mohlala, u ke ke ua sebelisa DN100 / 25.4 ka ho toba ho bala lisenthimithara), empa u tlameha ho itšetleha ka litafole tsa papiso tse tloaelehileng tsa indasteri.

4. Maemo a sebetsang le litlhaloso tsa ho ngola mabitso

DN:E sebediswa hangata diphaepheng tsa tshepe tsa dipalangwang tsa metsi le kgase (tse nang le galvanized kapa tse sa nang le galvanized), diphaephe tsa tshepe tse entsweng ka foreimi, diphaephe tsa polasetiki, jj.

Φ:E sebediswa hangata diphaepheng tsa tshepe tse se nang moedi, diphaepheng tsa tshepe e sa ruseng, diphaepheng tsa tshepe e se nang ferrous, jj. Ha e tshwauwa, hangata e sebediswa mmoho le botenya ba lebota, jwalo ka Φ108×4 (e bolelang bophara ba kantle ba 108mm, botenya ba lebota ba 4mm).

Senthimithara:E sebelisoa haholo liphaepheng le li-valve tse kenngoang litsamaisong tsa Amerika le Europe, hammoho le masimong a indasteri a setso joalo ka oli le khase ea tlhaho.

5. Kakaretso

Φ:E emela bophara ba 'nete ba kantle ba phaephe. ​​Ho khetha e tsamaellanangvalafo ea serurubele, valve ea hekelevalve ea ho hlahloba, sheba feela bophara ba kantle ba phaephe ka ho toba.

DN:Ke khoutu ea bophara ba lebitso la metric feela. Ha u reka li-valve, etsa bonnete ba hore u netefatsa letoto la A/I le B/II ho qoba ho hloleha ho hokela li-flange.TWSthepali-valve tsa serurubele, li-valve tsa heke, li-valve tsa ho hlahlobale lihlahisoa tse ling. Ha ho odarwa, diparamitha tsa letoto di tlameha ho hlaloswa ho netefatsa hore diphaephe di a tshwana.

Senthimithara (“):Bophara ba lebitso la Brithani, bo sebediswang haholo bakeng sa di-valve tse tswang kantle ho naha. 25.4 e ke ke ya sebediswa ho fetolela bophara ba kantle ka ho toba. E hloka ho netefatswa ka ho sheba tafole e tloaelehileng.