I-PSI vs PSI: Uyini Umehluko: Incazelo Elula

Ezweni lobunjiniyela, ukukhiqiza, kanye nokulawula uketshezi, amagama aqondile ayisisekelo sokuphepha nokusebenza kahle. Uma usebenza nezinhlelo zokucindezela, ama-valve, noma ama-gauge, kungenzeka ukuthi uke wahlangabezana nala magama.I-PSIfuthiI-PSIGNakuba zibukeka zifana, ukuzisebenzisa ngokushintshana kungaholela emaphutheni abalulekile ekwakhiweni nasekusebenzeni kwesistimu.

Kulo mhlahlandlela, sizohlukanisa umehluko phakathi kwe-PSI ne-PSI, sihlole izinhlelo zokusebenza zazo, futhi sichaze ukuthi kungani ukuqonda lo mehluko kubalulekile kunoma ubani osebenza nezinhlelo ezicindezelekile.

Iyini i-PSI?

I-PSIimeleAmaphawundi nge-intshi yesikwele. Kuyiyunithi eyisisekelo yokucindezela esetshenziselwa ukubala inani lamandla (ngamakhilogremu) asetshenziswa endaweni eyodwa yesikwele yesentimitha.

Kodwa-ke, igama elithi “PSI” ngokwalo livamile. Ngenxa yokuthi ingcindezi ihlala iwukuqhathanisa amaphuzu amabili, ukusho nje ukuthi “PSI” kungaba yinto engacacile. Ngokuvamile, lapho abantu besebenzisa elithi “PSI” engxoxweni evamile, babhekisela ekucindezelekeni okuhlobene nengcindezi yomoya—kodwa ngokwezobuchwepheshe, lokhu kuyingxenye yendaba kuphela. Ukuze sibe neqiniso, kumelwe sicacise ukuthi silinganisa sisuka endaweni engenalutho noma sisuka emoyeni osizungezile.

Iyini i-PSIG?

I-PSIGimeleAmaphawundi nge-Square Inch GaugeLokhu ukufundwa kwengcindezi okubonayo ku-gauge ejwayelekile yengcindezi.

U-“G” yingxenye ebaluleke kakhulu yalesi sifinyezo. Sichaza ukuthi ukulinganisa kuhlobene nomfutho womoya ozungezile. Ngamazwi alula, i-PSIG ikutshela ukuthi ingcindezi *eningi* kangakanani ohlelweni kunomoya olucindezelayo usuka ngaphandle.

- Iphuzu Eliyi-Zero:Esikalini se-PSIG, u-“0 PSIG” akusho ukuthi akukho ukucindezeleka okuphelele. Kunalokho, kusho ukuthi ukucindezeleka ngaphakathi kwesistimu kufana nokucindezela komoya okungaphandle (cishe u-14.7 PSI ezingeni lolwandle).

- Isifaniso Somhlaba Wangempela:Uma ufutha ithayi lemoto bese igeyiji ifundeka ukuthi i-32 PSIG, lokho kusho ukuthi umoya ongaphakathi ungamakhilogremu angu-32 nge-intshi yesikwele *ngaphezu* komfutho womoya.

Umehluko Obalulekile Phakathi kwe-PSI ne-PSI

Umehluko oyinhloko phakathi kwala magama amabili usekuqondeni kwawoindawo yokubhekisela.

> *Qaphela: Nakuba igama elithi “PSI” livame ukusetshenziswa ngokwesiko, ezimweni zesayensi eziqinile, ingcindezi ehlanganisa nomkhathi womhlaba ibizwa ngokuthi i-PSIA (Absolute).*

Ukuze ubone lokhu ngeso lengqondo, cabanga ngepayipi elivaliwe. Uma ususa wonke ama-molecule omoya ukuze wakhe i-vacuum ephelele, usunayo0 I-PSIA(Ngokuphelele). Uma uvula lelo phayiphi emoyeni ezingeni lolwandle, ingcindezi engaphakathi ikhuphukela ku-14.7 I-PSIA, okufundwa njengo0 i-PSIG.

Ukusetshenziswa kwe-PSI Ezimbonini Ezihlukahlukene

Uma isetshenziswa ngendlela yayo ephelele (ngokuvamile ichazwa ngokuthiI-PSIA), lokhu kulinganisa kubalulekile ekusetshenzisweni lapho izinguquko ekuphakameni noma ezimweni zomkhathi zingathinta inqubo.

1. Izindiza kanye Nezindiza:Ama-altimeter kanye nezinhlelo zokucindezela i-cabin zithembele ekufundweni kwengcindezi okuphelele ukuqinisekisa ukuphepha ezindaweni eziphakeme.

2. Ubuchwepheshe bokushaja i-vacuum:Ezinhlelweni eziklanyelwe ukudala i-vacuum, ososayensi balinganisa ukuthi sebefinyelele kude kangakanani ekucindezelweni komoya kuya ku-vacuum ephelele, edinga izikali zokucindezela eziphelele.

3. Ukupakisha Ukudla:I-Modified Atmosphere Packaging (MAP) ivame ukusebenzisa izibalo zokucindezela okuphelele ukuqinisekisa ukuthi ingxube efanele yegesi ivaliwe ngaphakathi kwephakheji kungakhathaliseki isimo sezulu noma ukuphakama kwesitshalo.

4. Isiqandisi se-HVAC:Ochwepheshe basebenzisa ama-gauge amaningi afundeka ku-PSIG, kodwa lapho bebala ukushisa okuphezulu kanye nokupholisa okungaphansi kokushaja kwesistimu, bavame ukuguqulela ku-absolute pressure (PSIA) ukuze kuqhathaniswe kahle i-thermodynamic properties.

Ukusetshenziswa kwe-PSIG Ezimbonini Ezihlukahlukene

Ngenxa yokuthi izwe esiphila kulo lingaphansi kwengcindezi yomoya engaguquki, i-PSIG iyisilinganiso esiwusizo kakhulu semishini yansuku zonke yezimboni. Ama-valve, amaphampu, namapayipi ngokuvamile alinganiswa ku-PSIG ngoba kumele amelane nengcindezi *ehlukile*.

1. Ukukhiqizwa kwama-Valve:Umaivalvu enomfutho ophezuluIshidi lemininingwane libala ukucindezela okuphezulu okungu-150 PSIG, kusho ukuthi ivalvu ingaphatha ukucindezela kwangaphakathi okungu-150 psi ngaphezu komoya wangaphandle. Uma leyo valve iyiswa esiqongweni sentaba, amandla ayo asebenzayo angashintsha, yingakho i-PSIG iyisilinganiso esijwayelekile.

2. Izinhlelo ze-Hydraulic:Imishini yokwakha, njengemishini yokumba kanye nama-lift, isebenzisa i-PSIG ukukala amandla oketshezi lwe-hydraulic. Igeyiji ikhombisa ingcindezi ekhiqizwa yiphampu ngaphezu kwengcindezi yomoya.

3. Izitshalo Zokuhlanza Amanzi:Abasebenzi baqapha i-PSIG ukuqinisekisa ukuthi amapayipi namathangi okuhlunga awacindezelwa ngokweqile.

4. Amathuluzi Omoya:Ama-wrench anamandla kanye nama-compressor omoya alinganiswa ku-PSIG. Ithangi le-compressor eligcina umoya ku-100 PSIG libamba umoya oxinene ngama-100 psi kunomoya wangaphandle, olungele ukusebenza.

Ukubaluleka Kokuqonda Ukulinganisa Ukucindezela

Kumafektri ama-valve noma kumthengi wezimboni, ukudideka kwala magama kungaba kubi kakhulu futhi kube yingozi.

- Izingozi Zokuphepha:Uma ivalvu ikalwe nge-150 PSI (ehunyushwa ngokuthi i-Absolute), bese uyifaka ohlelweni olusebenza ku-135 PSIG, empeleni uyibeka ngaphansi komthetho.149.7 I-PSIA(135 PSIG + 14.7 emoyeni). Ubuyobe usebenza eduze kakhulu nendawo yokwehluleka.

- Ukusebenza Kahle Kohlelo:Amaphampu nama-compressor athembele ekuhlukaneni kwengcindezi ukuze ahambise uketshezi. Uma uklama uhlelo usebenzisa izinombolo eziphelele lapho usho izinombolo zokulinganisa, iphampu ingase ingabi namandla anele okunqoba ukuphakama noma ukungqubuzana kwamaphayiphi.

Imibono Engalungile Evamile Mayelana ne-PSI kanye ne-PSIG

1. I-PSI ifana ne-PSI.

Lokhu kungamanga. Ezimweni eziningi zezimboni, igama elithi “PSI” lisetshenziswa njengendlela yokuxhumana nabantu, kodwa ngokobuchwepheshe, uma inombolo ivela ku-standard dial gauge, iyi-PSIG. Uma kuyi-theory calculation ehilela imithetho ye-vacuum noma igesi, kungenzeka ukuthi yi-PSIA.

2. Ukucindezela komoya akubalulekile.

Nakuba i-14.7 PSI ingase ibonakale incane uma iqhathaniswa nesistimu ye-hydraulic ye-3,000 PSI, ibalulekile ezinhlelweni ezinengcindezi ephansi (njengokungenisa umoya noma ukulethwa kwegesi) futhi ibaluleke kakhulu kubunjiniyela obunembe kakhulu.

Indlela Yokuguqula Phakathi Kwe-PSI Ne-PSI (Absolute)

Ukuze ushintshe ngokunembile phakathi kokucindezela kwegeyiji kanye nokucindezela okuphelele, udinga ukucabanga ngokucindezela komoya.

Ifomula:

- I-PSIA = I-PSIG + 14.7(Ingcindezi yomoya olwandle)
- I-PSIG = I-PSIA – 14.7

Isibonelo:

Uma imithambo yokucindezela ibonisa ukufundwa kwe-I-PSIG engu-50ngesilinganiso:
- Ukucindezeleka Okuphelele (i-PSIA)= 50 + 14.7 =64.7 I-PSIA

*Qaphela: Ngomsebenzi onembile kakhulu noma ezindaweni eziphakeme kakhulu, inani elijwayelekile le-psi elingu-14.7 kumele lilungiswe ukuze lihambisane nokucindezela kwendawo kwe-barometric.*

Imibuzo Evame Ukubuzwa Mayelana ne-PSI kanye ne-PSI

Ingabe i-PSI iyafana ne-PSI?

Cha. I-PSI yigama elijwayelekile lamaphawundi nge-intshi yesikwele. I-PSI ibhekisela ngqo ekucindezelweni okulinganiswe ngokuphathelene nokucindezela komoya (ingcindezi yokulinganisa). Uma umuntu ethi “PSI” ngokuphathelene nokufundwa kwegeyiji, cishe njalo usho i-PSI.

Ngingayiguqula kanjani i-PSIG ibe yi-PSIA?

Engeza ingcindezi yomoya (14.7 psi ezingeni lolwandle) enanini le-PSIG. Ifomula: PSIA = PSIG + 14.7.

Kungani ama-valve elinganiswa ku-PSI esikhundleni se-PSI?

Ama-valve alinganiswa ku-PSIG ngoba kumele amelane nomehluko wokucindezela phakathi kwengaphakathi lepayipi nomoya wangaphandle. Lo mehluko yiwona obangela ukucindezeleka emzimbeni we-valve.

Isiphetho: Ukukhetha Ukulinganisa Ukucindezela Okufanele Kwezidingo Zakho

Ukuqonda umehluko phakathi kwe-**PSIG ne-PSI** kungaphezu nje kwemibuzo yobuchwepheshe—kuyisidingo sokuphepha nokunemba ekulawuleni uketshezi.

- Uma ubheka igeyiji ethangini, epayipini, noma evalvini:UbhekeI-PSIG.

- Uma wenza izibalo zesayensi noma usebenza nezinhlelo ezivaliwe:UdingaI-PSIA(I-PSI Ephelele).

At Umkhiqizi we-NSW Valve, siklama imikhiqizo yethu ukuze imelane nezidingo ezinzima zezicelo zezimboni zangempela. Zonke izilinganiso zethu zokucindezela zibhalwe ngokucacile ku-PSIG ukuze zikusize ukhethe i-valve efanele izimo zakho zokusebenza ezithile. Uma unemibuzo mayelana nezilinganiso zokucindezela zephrojekthi yakho elandelayo, xhumana nethimba lethu lobunjiniyela namuhla.